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Introduce logical decoding.

Browse Source 
This feature, building on previous commits, allows the write-ahead log
stream to be decoded into a series of logical changes; that is,
inserts, updates, and deletes and the transactions which contain them.
It is capable of handling decoding even across changes to the schema
of the effected tables.  The output format is controlled by a
so-called "output plugin"; an example is included.  To make use of
this in a real replication system, the output plugin will need to be
modified to produce output in the format appropriate to that system,
and to perform filtering.

Currently, information can be extracted from the logical decoding
system only via SQL; future commits will add the ability to stream
changes via walsender.

Andres Freund, with review and other contributions from many other
people, including Álvaro Herrera, Abhijit Menon-Sen, Peter Gheogegan,
Kevin Grittner, Robert Haas, Heikki Linnakangas, Fujii Masao, Abhijit
Menon-Sen, Michael Paquier, Simon Riggs, Craig Ringer, and Steve
Singer.
This commit is contained in:
Robert Haas
2014-03-03 16:32:18 -05:00
parent de94b47c0a
commit b89e151054
89 changed files with 12998 additions and 194 deletions
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4
contrib/test_decoding/.gitignore vendored Normal file
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# Generated subdirectories
/log/
/results/
/tmp_check/

69
contrib/test_decoding/Makefile Normal file
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# contrib/test_decoding/Makefile
MODULES = test_decoding
OBJS = test_decoding.o
# Note: because we don't tell the Makefile there are any regression tests,
# we have to clean those result files explicitly
EXTRA_CLEAN = -r $(pg_regress_clean_files)
ifdef USE_PGXS
PG_CONFIG = pg_config
PGXS := $(shell $(PG_CONFIG) --pgxs)
include $(PGXS)
else
subdir = contrib/test_decoding
top_builddir = ../..
include $(top_builddir)/src/Makefile.global
include $(top_srcdir)/contrib/contrib-global.mk
endif
# Disabled because these tests require "wal_level=logical", which
# typical installcheck users do not have (e.g. buildfarm clients).
installcheck:;
# But it can nonetheless be very helpful to run tests on preexisting
# installation, allow to do so, but only if requested explicitly.
installcheck-force: regresscheck-install-force isolationcheck-install-force
check: regresscheck isolationcheck
submake-regress:
$(MAKE) -C $(top_builddir)/src/test/regress all
submake-isolation:
$(MAKE) -C $(top_builddir)/src/test/isolation all
submake-test_decoding:
$(MAKE) -C $(top_builddir)/contrib/test_decoding
REGRESSCHECKS=ddl rewrite toast permissions decoding_in_xact binary
regresscheck: all | submake-regress submake-test_decoding
$(pg_regress_check) \
--temp-config $(top_srcdir)/contrib/test_decoding/logical.conf \
--temp-install=./tmp_check \
--extra-install=contrib/test_decoding \
$(REGRESSCHECKS)
regresscheck-install-force: | submake-regress submake-test_decoding
$(pg_regress_installcheck) \
--extra-install=contrib/test_decoding \
$(REGRESSCHECKS)
ISOLATIONCHECKS=mxact delayed_startup concurrent_ddl_dml
isolationcheck: all | submake-isolation submake-test_decoding
$(pg_isolation_regress_check) \
--temp-config $(top_srcdir)/contrib/test_decoding/logical.conf \
--extra-install=contrib/test_decoding \
$(ISOLATIONCHECKS)
isolationcheck-install-force: all | submake-isolation submake-test_decoding
$(pg_isolation_regress_installcheck) \
--extra-install=contrib/test_decoding \
$(ISOLATIONCHECKS)
PHONY: submake-test_decoding submake-regress check \
regresscheck regresscheck-install-force \
isolationcheck isolationcheck-install-force

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contrib/test_decoding/expected/binary.out Normal file
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-- predictability
SET synchronous_commit = on;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
-- succeeds, textual plugin, textual consumer
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '0');
data
------
(0 rows)
-- fails, binary plugin, textual consumer
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '1');
ERROR: output plugin cannot produce text output
-- succeeds, textual plugin, binary consumer
SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '0');
data
------
(0 rows)
-- succeeds, binary plugin, binary consumer
SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '1');
data
------
(0 rows)
SELECT 'init' FROM pg_drop_replication_slot('regression_slot');
?column?
----------
init
(1 row)

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contrib/test_decoding/expected/concurrent_ddl_dml.out Normal file
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Parsed test spec with 2 sessions
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_float s1_insert_tbl2 s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_float: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE float;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[double precision]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl1_float s1_insert_tbl2 s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_float: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float; <waiting ...>
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl1_float: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[double precision]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_char s1_insert_tbl2 s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl1_char s1_insert_tbl2 s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying; <waiting ...>
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl1_char: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s2_alter_tbl1_float s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_float: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl1_float: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[double precision]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s2_alter_tbl1_char s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl1_char: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_float s1_insert_tbl2 s2_alter_tbl1_float s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_float: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE float;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_float: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl1_float: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[double precision]:1
COMMIT
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[double precision]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_char s1_insert_tbl2 s2_alter_tbl1_char s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl1_char: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[character varying]:'1'
COMMIT
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_char s1_begin s1_insert_tbl1 s2_alter_tbl2_text s1_insert_tbl2 s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_text: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE text;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[text]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_char s1_begin s1_insert_tbl1 s2_alter_tbl2_text s1_insert_tbl2 s2_alter_tbl1_char s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_char: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying;
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_text: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE text;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_char: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl1_char: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[text]:'1'
COMMIT
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_boolean s1_insert_tbl2 s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_boolean: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean;
ERROR: column "val2" cannot be cast automatically to type boolean
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_boolean s1_insert_tbl2 s2_alter_tbl1_boolean s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_boolean: ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean;
ERROR: column "val2" cannot be cast automatically to type boolean
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_alter_tbl1_boolean: ALTER TABLE tbl1 ALTER COLUMN val2 TYPE boolean; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl1_boolean: <... completed>
error in steps s1_commit s2_alter_tbl1_boolean: ERROR: column "val2" cannot be cast automatically to type boolean
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_add_int s1_insert_tbl2_3col s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s1_commit s1_begin s2_alter_tbl2_add_int s1_insert_tbl2_3col s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s1_begin: BEGIN;
step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_add_float s1_insert_tbl2_3col s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_add_float: ALTER TABLE tbl2 ADD COLUMN val3 FLOAT;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[double precision]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s1_commit s1_begin s2_alter_tbl2_add_float s1_insert_tbl2_3col s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s1_begin: BEGIN;
step s2_alter_tbl2_add_float: ALTER TABLE tbl2 ADD COLUMN val3 FLOAT;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[double precision]:1
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s2_alter_tbl2_add_char s1_insert_tbl2_3col s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s1_begin s1_insert_tbl1 s1_insert_tbl2 s1_commit s1_begin s2_alter_tbl2_add_char s1_insert_tbl2_3col s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s1_begin: BEGIN;
step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_int s1_begin s1_insert_tbl2_3col s2_alter_tbl2_drop_3rd_col s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
step s1_begin: BEGIN;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl2_drop_3rd_col: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
COMMIT
BEGIN
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_int s1_begin s1_insert_tbl2_3col s2_alter_tbl2_drop_3rd_col s1_insert_tbl2 s1_commit s1_insert_tbl2 s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
step s1_begin: BEGIN;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3; <waiting ...>
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl2_drop_3rd_col: <... completed>
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:null
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_int s1_begin s1_insert_tbl2_3col s2_alter_tbl2_drop_3rd_col s1_commit s2_get_changes s2_alter_tbl2_add_text s1_begin s1_insert_tbl2_3col s2_alter_tbl2_3rd_char s1_insert_tbl2_3col s1_commit s2_get_changes s2_alter_tbl2_3rd_int s1_insert_tbl2_3col s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_int: ALTER TABLE tbl2 ADD COLUMN val3 INTEGER;
step s1_begin: BEGIN;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3; <waiting ...>
step s1_commit: COMMIT;
step s2_alter_tbl2_drop_3rd_col: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
COMMIT
BEGIN
COMMIT
step s2_alter_tbl2_add_text: ALTER TABLE tbl2 ADD COLUMN val3 TEXT;
step s1_begin: BEGIN;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_alter_tbl2_3rd_char: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying; <waiting ...>
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl2_3rd_char: <... completed>
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
COMMIT
BEGIN
COMMIT
step s2_alter_tbl2_3rd_int: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE int USING val3::integer;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
table public.pg_temp: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:null
table public.pg_temp: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
table public.pg_temp: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_char s1_begin s1_insert_tbl1 s1_insert_tbl2_3col s2_alter_tbl2_3rd_text s1_insert_tbl2_3col s1_commit s1_insert_tbl2_3col s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_alter_tbl2_3rd_text: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE text; <waiting ...>
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl2_3rd_text: <... completed>
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_text s1_begin s1_insert_tbl1 s1_insert_tbl2_3col s2_alter_tbl2_3rd_char s1_insert_tbl2_3col s1_commit s1_insert_tbl2_3col s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_text: ALTER TABLE tbl2 ADD COLUMN val3 TEXT;
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_alter_tbl2_3rd_char: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying; <waiting ...>
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl2_3rd_char: <... completed>
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_char s1_begin s1_insert_tbl1 s2_alter_tbl2_3rd_text s1_insert_tbl2_3col s1_commit s2_alter_tbl2_drop_3rd_col s1_insert_tbl2 s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_3rd_text: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE text;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[text]:'1'
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_text s1_begin s1_insert_tbl1 s2_alter_tbl2_3rd_char s1_insert_tbl2_3col s1_commit s2_alter_tbl2_drop_3rd_col s1_insert_tbl2 s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_text: ALTER TABLE tbl2 ADD COLUMN val3 TEXT;
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_3rd_char: ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying;
step s1_insert_tbl2_3col: INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1);
step s1_commit: COMMIT;
step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
step s1_insert_tbl2: INSERT INTO tbl2 (val1, val2) VALUES (1, 1);
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1 val3[character varying]:'1'
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl2: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
?column?
stop
starting permutation: s1_init s2_alter_tbl2_add_char s1_begin s1_insert_tbl1 s2_alter_tbl2_drop_3rd_col s1_insert_tbl1 s1_commit s2_get_changes
step s1_init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s2_alter_tbl2_add_char: ALTER TABLE tbl2 ADD COLUMN val3 character varying;
step s1_begin: BEGIN;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s2_alter_tbl2_drop_3rd_col: ALTER TABLE tbl2 DROP COLUMN val3;
step s1_insert_tbl1: INSERT INTO tbl1 (val1, val2) VALUES (1, 1);
step s1_commit: COMMIT;
step s2_get_changes: SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0');
data
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
table public.tbl1: INSERT: val1[integer]:1 val2[integer]:1
COMMIT
?column?
stop

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-- predictability
SET synchronous_commit = on;
-- fail because we're creating a slot while in an xact with xid
BEGIN;
SELECT txid_current() = 0;
?column?
----------
f
(1 row)
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
ERROR: cannot create logical replication slot in transaction that has performed writes
ROLLBACK;
-- fail because we're creating a slot while in an subxact whose topxact has a xid
BEGIN;
SELECT txid_current() = 0;
?column?
----------
f
(1 row)
SAVEPOINT barf;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
ERROR: cannot create logical replication slot in transaction that has performed writes
ROLLBACK TO SAVEPOINT barf;
ROLLBACK;
-- succeed, outside tx.
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
?column?
----------
stop
(1 row)
-- succeed, in tx without xid.
BEGIN;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
COMMIT;
CREATE TABLE nobarf(id serial primary key, data text);
INSERT INTO nobarf(data) VALUES('1');
-- decoding works in transaction with xid
BEGIN;
SELECT txid_current() = 0;
?column?
----------
f
(1 row)
-- don't show yet, haven't committed
INSERT INTO nobarf(data) VALUES('2');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
data
-----------------------------------------------------------
BEGIN
COMMIT
BEGIN
table public.nobarf: INSERT: id[integer]:1 data[text]:'1'
COMMIT
(5 rows)
COMMIT;
INSERT INTO nobarf(data) VALUES('3');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
data
-----------------------------------------------------------
BEGIN
table public.nobarf: INSERT: id[integer]:2 data[text]:'2'
COMMIT
BEGIN
table public.nobarf: INSERT: id[integer]:3 data[text]:'3'
COMMIT
(6 rows)
SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
?column?
----------
stop
(1 row)

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Parsed test spec with 2 sessions
starting permutation: s1b s1w s2init s1c s2start s1b s1w s1c s2start s1b s1w s2start s1c s2start
step s1b: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1w: INSERT INTO do_write DEFAULT VALUES;
step s2init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding'); <waiting ...>
step s1c: COMMIT;
step s2init: <... completed>
?column?
init
step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
step s1b: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1w: INSERT INTO do_write DEFAULT VALUES;
step s1c: COMMIT;
step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
BEGIN
table public.do_write: INSERT: id[integer]:2
COMMIT
step s1b: BEGIN ISOLATION LEVEL SERIALIZABLE;
step s1w: INSERT INTO do_write DEFAULT VALUES;
step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
step s1c: COMMIT;
step s2start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
BEGIN
table public.do_write: INSERT: id[integer]:3
COMMIT
?column?
stop

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Parsed test spec with 3 sessions
starting permutation: s0init s0start s1begin s1sharepgclass s2begin s2sharepgclass s0w s0start s2commit s1commit
step s0init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
step s1begin: BEGIN;
step s1sharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s;
?column?
t
step s2begin: BEGIN;
step s2sharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s;
?column?
t
step s0w: INSERT INTO do_write DEFAULT VALUES;
step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
BEGIN
table public.do_write: INSERT: id[integer]:1
COMMIT
step s2commit: COMMIT;
step s1commit: COMMIT;
?column?
stop
starting permutation: s0init s0start s1begin s1keysharepgclass s2begin s2keysharepgclass s0alter s0w s0start s2commit s1commit
step s0init: SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');
?column?
init
step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
step s1begin: BEGIN;
step s1keysharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s;
?column?
t
step s2begin: BEGIN;
step s2keysharepgclass: SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s;
?column?
t
step s0alter: ALTER TABLE do_write ADD column ts timestamptz;
step s0w: INSERT INTO do_write DEFAULT VALUES;
step s0start: SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');
data
BEGIN
COMMIT
BEGIN
table public.do_write: INSERT: id[integer]:1 ts[timestamp with time zone]:null
COMMIT
step s2commit: COMMIT;
step s1commit: COMMIT;
?column?
stop

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-- predictability
SET synchronous_commit = on;
-- setup
CREATE ROLE lr_normal;
CREATE ROLE lr_superuser SUPERUSER;
CREATE ROLE lr_replication REPLICATION;
CREATE TABLE lr_test(data text);
-- superuser can control replication
SET ROLE lr_superuser;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
INSERT INTO lr_test VALUES('lr_superuser_init');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
data
--------------------------------------------------------------
BEGIN
table public.lr_test: INSERT: data[text]:'lr_superuser_init'
COMMIT
(3 rows)
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
RESET ROLE;
-- replication user can control replication
SET ROLE lr_replication;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
INSERT INTO lr_test VALUES('lr_superuser_init');
ERROR: permission denied for relation lr_test
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
data
------
(0 rows)
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
RESET ROLE;
-- plain user *can't* can control replication
SET ROLE lr_normal;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
ERROR: must be superuser or replication role to use replication slots
INSERT INTO lr_test VALUES('lr_superuser_init');
ERROR: permission denied for relation lr_test
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
ERROR: must be superuser or replication role to use replication slots
SELECT pg_drop_replication_slot('regression_slot');
ERROR: must be superuser or replication role to use replication slots
RESET ROLE;
-- replication users can drop superuser created slots
SET ROLE lr_superuser;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
RESET ROLE;
SET ROLE lr_replication;
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
RESET ROLE;
-- normal users can't drop existing slots
SET ROLE lr_superuser;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
RESET ROLE;
SET ROLE lr_normal;
SELECT pg_drop_replication_slot('regression_slot');
ERROR: must be superuser or replication role to use replication slots
RESET ROLE;
-- all users can see existing slots
SET ROLE lr_superuser;
SELECT slot_name, plugin FROM pg_replication_slots;
slot_name | plugin
-----------------+---------------
regression_slot | test_decoding
(1 row)
RESET ROLE;
SET ROLE lr_replication;
SELECT slot_name, plugin FROM pg_replication_slots;
slot_name | plugin
-----------------+---------------
regression_slot | test_decoding
(1 row)
RESET ROLE;
SET ROLE lr_normal;
SELECT slot_name, plugin FROM pg_replication_slots;
slot_name | plugin
-----------------+---------------
regression_slot | test_decoding
(1 row)
RESET ROLE;
-- cleanup
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
DROP ROLE lr_normal;
DROP ROLE lr_superuser;
DROP ROLE lr_replication;
DROP TABLE lr_test;

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-- predictability
SET synchronous_commit = on;
DROP TABLE IF EXISTS replication_example;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
INSERT INTO replication_example(somedata) VALUES (1);
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
data
----------------------------------------------------------------------------------------------------------
BEGIN
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:1 somedata[integer]:1 text[character varying]:null
COMMIT
(5 rows)
BEGIN;
INSERT INTO replication_example(somedata) VALUES (2);
ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (3, 1);
COMMIT;
BEGIN;
INSERT INTO replication_example(somedata) VALUES (3);
ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4, 2, 1);
COMMIT;
VACUUM FULL pg_am;
VACUUM FULL pg_amop;
VACUUM FULL pg_proc;
VACUUM FULL pg_opclass;
VACUUM FULL pg_type;
VACUUM FULL pg_index;
VACUUM FULL pg_database;
-- repeated rewrites that fail
BEGIN;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
ROLLBACK;
-- repeated rewrites that succeed
BEGIN;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
COMMIT;
-- repeated rewrites in different transactions
VACUUM FULL pg_class;
VACUUM FULL pg_class;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
BEGIN;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
COMMIT;
-- make old files go away
CHECKPOINT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
data
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BEGIN
table public.replication_example: INSERT: id[integer]:2 somedata[integer]:2 text[character varying]:null
table public.replication_example: INSERT: id[integer]:3 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:1
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:4 somedata[integer]:3 text[character varying]:null testcolumn1[integer]:null
table public.replication_example: INSERT: id[integer]:5 somedata[integer]:4 text[character varying]:null testcolumn1[integer]:2 testcolumn2[integer]:1
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:6 somedata[integer]:5 text[character varying]:null testcolumn1[integer]:3 testcolumn2[integer]:null
COMMIT
BEGIN
table public.replication_example: INSERT: id[integer]:7 somedata[integer]:6 text[character varying]:null testcolumn1[integer]:4 testcolumn2[integer]:null
table public.replication_example: INSERT: id[integer]:8 somedata[integer]:7 text[character varying]:null testcolumn1[integer]:5 testcolumn2[integer]:null testcolumn3[integer]:1
COMMIT
(35 rows)
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)
DROP TABLE IF EXISTS replication_example;

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-- predictability
SET synchronous_commit = on;
DROP TABLE IF EXISTS xpto;
NOTICE: table "xpto" does not exist, skipping
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
?column?
----------
init
(1 row)
CREATE SEQUENCE xpto_rand_seq START 79 INCREMENT 1499; -- portable "random"
CREATE TABLE xpto (
id serial primary key,
toasted_col1 text,
rand1 float8 DEFAULT nextval('xpto_rand_seq'),
toasted_col2 text,
rand2 float8 DEFAULT nextval('xpto_rand_seq')
);
-- uncompressed external toast data
INSERT INTO xpto (toasted_col1, toasted_col2) SELECT string_agg(g.i::text, ''), string_agg((g.i*2)::text, '') FROM generate_series(1, 2000) g(i);
-- compressed external toast data
INSERT INTO xpto (toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
-- update of existing column
UPDATE xpto SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i)) WHERE id = 1;
UPDATE xpto SET rand1 = 123.456 WHERE id = 1;
DELETE FROM xpto WHERE id = 1;
DROP TABLE IF EXISTS toasted_key;
NOTICE: table "toasted_key" does not exist, skipping
CREATE TABLE toasted_key (
id serial,
toasted_key text PRIMARY KEY,
toasted_col1 text,
toasted_col2 text
);
ALTER TABLE toasted_key ALTER COLUMN toasted_key SET STORAGE EXTERNAL;
ALTER TABLE toasted_key ALTER COLUMN toasted_col1 SET STORAGE EXTERNAL;
INSERT INTO toasted_key(toasted_key, toasted_col1) VALUES(repeat('1234567890', 200), repeat('9876543210', 200));
-- test update of a toasted key without changing it
UPDATE toasted_key SET toasted_col2 = toasted_col1;
-- test update of a toasted key, changing it
UPDATE toasted_key SET toasted_key = toasted_key || '1';
DELETE FROM toasted_key;
SELECT substr(data, 1, 200) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
substr
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.xpto: INSERT: id[integer]:1 toasted_col1[text]:'1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
COMMIT
BEGIN
table public.xpto: INSERT: id[integer]:2 toasted_col1[text]:null rand1[double precision]:3077 toasted_col2[text]:'00010002000300040005000600070008000900100011001200130014001500160017001800190020002100
COMMIT
BEGIN
table public.xpto: UPDATE: id[integer]:1 toasted_col1[text]:'1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374
COMMIT
BEGIN
table public.xpto: UPDATE: id[integer]:1 toasted_col1[text]:unchanged-toast-datum rand1[double precision]:123.456 toasted_col2[text]:unchanged-toast-datum rand2[double precision]:1578
COMMIT
BEGIN
table public.xpto: DELETE: id[integer]:1
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
COMMIT
BEGIN
table public.toasted_key: INSERT: id[integer]:1 toasted_key[text]:'1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123
COMMIT
BEGIN
table public.toasted_key: UPDATE: id[integer]:1 toasted_key[text]:unchanged-toast-datum toasted_col1[text]:unchanged-toast-datum toasted_col2[text]:'987654321098765432109876543210987654321098765432109
COMMIT
BEGIN
table public.toasted_key: UPDATE: old-key: toasted_key[text]:'123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678
COMMIT
BEGIN
table public.toasted_key: DELETE: toasted_key[text]:'123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567
COMMIT
(37 rows)
SELECT pg_drop_replication_slot('regression_slot');
pg_drop_replication_slot
--------------------------
(1 row)

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wal_level = logical
max_replication_slots = 4

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setup
{
DROP TABLE IF EXISTS tbl1;
DROP TABLE IF EXISTS tbl2;
CREATE TABLE tbl1(val1 integer, val2 integer);
CREATE TABLE tbl2(val1 integer, val2 integer);
}
teardown
{
DROP TABLE tbl1;
DROP TABLE tbl2;
SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
}
session "s1"
step "s1_init" { SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding'); }
step "s1_begin" { BEGIN; }
step "s1_insert_tbl1" { INSERT INTO tbl1 (val1, val2) VALUES (1, 1); }
step "s1_insert_tbl1_3col" { INSERT INTO tbl1 (val1, val2, val3) VALUES (1, 1, 1); }
step "s1_insert_tbl2" { INSERT INTO tbl2 (val1, val2) VALUES (1, 1); }
step "s1_insert_tbl2_3col" { INSERT INTO tbl2 (val1, val2, val3) VALUES (1, 1, 1); }
step "s1_commit" { COMMIT; }
session "s2"
step "s2_alter_tbl1_float" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE float; }
step "s2_alter_tbl1_char" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE character varying; }
step "s2_alter_tbl1_text" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE text; }
step "s2_alter_tbl1_boolean" { ALTER TABLE tbl1 ALTER COLUMN val2 TYPE boolean; }
step "s2_alter_tbl1_add_int" { ALTER TABLE tbl1 ADD COLUMN val3 INTEGER; }
step "s2_alter_tbl1_add_float" { ALTER TABLE tbl1 ADD COLUMN val3 FLOAT; }
step "s2_alter_tbl1_add_char" { ALTER TABLE tbl1 ADD COLUMN val3 character varying; }
step "s2_alter_tbl1_add_boolean" { ALTER TABLE tbl1 ADD COLUMN val3 BOOLEAN; }
step "s2_alter_tbl1_add_text" { ALTER TABLE tbl1 ADD COLUMN val3 TEXT; }
step "s2_alter_tbl2_float" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE float; }
step "s2_alter_tbl2_char" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE character varying; }
step "s2_alter_tbl2_text" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE text; }
step "s2_alter_tbl2_boolean" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean; }
step "s2_alter_tbl2_text" { ALTER TABLE tbl2 ALTER COLUMN val2 TYPE boolean; }
step "s2_alter_tbl2_add_int" { ALTER TABLE tbl2 ADD COLUMN val3 INTEGER; }
step "s2_alter_tbl2_add_float" { ALTER TABLE tbl2 ADD COLUMN val3 FLOAT; }
step "s2_alter_tbl2_add_char" { ALTER TABLE tbl2 ADD COLUMN val3 character varying; }
step "s2_alter_tbl2_add_boolean" { ALTER TABLE tbl2 ADD COLUMN val3 BOOLEAN; }
step "s2_alter_tbl2_add_text" { ALTER TABLE tbl2 ADD COLUMN val3 TEXT; }
step "s2_alter_tbl2_drop_3rd_col" { ALTER TABLE tbl2 DROP COLUMN val3; }
step "s2_alter_tbl2_3rd_char" { ALTER TABLE tbl2 ALTER COLUMN val3 TYPE character varying; }
step "s2_alter_tbl2_3rd_text" { ALTER TABLE tbl2 ALTER COLUMN val3 TYPE text; }
step "s2_alter_tbl2_3rd_int" { ALTER TABLE tbl2 ALTER COLUMN val3 TYPE int USING val3::integer; }
step "s2_get_changes" { SELECT regexp_replace(data, 'temp_\d+', 'temp') AS data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', '0'); }
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_float" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl1_float" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_char" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl1_char" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s2_alter_tbl1_float" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s2_alter_tbl1_char" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_float" "s1_insert_tbl2" "s2_alter_tbl1_float" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_char" "s1_insert_tbl2" "s2_alter_tbl1_char" "s1_commit" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_text" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_text" "s1_insert_tbl2" "s2_alter_tbl1_char" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_boolean" "s1_insert_tbl2" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_boolean" "s1_insert_tbl2" "s2_alter_tbl1_boolean" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_add_int" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s1_commit" "s1_begin" "s2_alter_tbl2_add_int" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_add_float" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s1_commit" "s1_begin" "s2_alter_tbl2_add_float" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_add_char" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
permutation "s1_init" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2" "s1_commit" "s1_begin" "s2_alter_tbl2_add_char" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_int" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_drop_3rd_col" "s1_commit" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_int" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl2" "s1_commit" "s1_insert_tbl2" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_int" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_drop_3rd_col" "s1_commit" "s2_get_changes" "s2_alter_tbl2_add_text" "s1_begin" "s1_insert_tbl2_3col" "s2_alter_tbl2_3rd_char" "s1_insert_tbl2_3col" "s1_commit" "s2_get_changes" "s2_alter_tbl2_3rd_int" "s1_insert_tbl2_3col" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_char" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2_3col" "s2_alter_tbl2_3rd_text" "s1_insert_tbl2_3col" "s1_commit" "s1_insert_tbl2_3col" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_text" "s1_begin" "s1_insert_tbl1" "s1_insert_tbl2_3col" "s2_alter_tbl2_3rd_char" "s1_insert_tbl2_3col" "s1_commit" "s1_insert_tbl2_3col" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_3rd_text" "s1_insert_tbl2_3col" "s1_commit" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl2" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_text" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_3rd_char" "s1_insert_tbl2_3col" "s1_commit" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl2" "s2_get_changes"
permutation "s1_init" "s2_alter_tbl2_add_char" "s1_begin" "s1_insert_tbl1" "s2_alter_tbl2_drop_3rd_col" "s1_insert_tbl1" "s1_commit" "s2_get_changes"

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setup
{
DROP TABLE IF EXISTS do_write;
CREATE TABLE do_write(id serial primary key);
}
teardown
{
DROP TABLE do_write;
SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
}
session "s1"
setup { SET synchronous_commit=on; }
step "s1b" { BEGIN ISOLATION LEVEL SERIALIZABLE; }
step "s1w" { INSERT INTO do_write DEFAULT VALUES; }
step "s1c" { COMMIT; }
session "s2"
setup { SET synchronous_commit=on; }
step "s2init" {SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');}
step "s2start" {SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');}
permutation "s1b" "s1w" "s2init" "s1c" "s2start" "s1b" "s1w" "s1c" "s2start" "s1b" "s1w" "s2start" "s1c" "s2start"

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setup
{
DROP TABLE IF EXISTS do_write;
CREATE TABLE do_write(id serial primary key);
}
teardown
{
DROP TABLE IF EXISTS do_write;
SELECT 'stop' FROM pg_drop_replication_slot('isolation_slot');
}
session "s0"
setup { SET synchronous_commit=on; }
step "s0init" {SELECT 'init' FROM pg_create_logical_replication_slot('isolation_slot', 'test_decoding');}
step "s0start" {SELECT data FROM pg_logical_slot_get_changes('isolation_slot', NULL, NULL, 'include-xids', 'false');}
step "s0alter" {ALTER TABLE do_write ADD column ts timestamptz; }
step "s0w" { INSERT INTO do_write DEFAULT VALUES; }
session "s1"
setup { SET synchronous_commit=on; }
step "s1begin" {BEGIN;}
step "s1sharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s; }
step "s1keysharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s; }
step "s1commit" {COMMIT;}
session "s2"
setup { SET synchronous_commit=on; }
step "s2begin" {BEGIN;}
step "s2sharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR SHARE) s; }
step "s2keysharepgclass" { SELECT count(*) > 1 FROM (SELECT * FROM pg_class FOR KEY SHARE) s; }
step "s2commit" {COMMIT;}
# test that we're handling an update-only mxact xmax correctly
permutation "s0init" "s0start" "s1begin" "s1sharepgclass" "s2begin" "s2sharepgclass" "s0w" "s0start" "s2commit" "s1commit"
# test that we're handling an update-only mxact xmax correctly
permutation "s0init" "s0start" "s1begin" "s1keysharepgclass" "s2begin" "s2keysharepgclass" "s0alter" "s0w" "s0start" "s2commit" "s1commit"

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-- predictability
SET synchronous_commit = on;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
-- succeeds, textual plugin, textual consumer
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '0');
-- fails, binary plugin, textual consumer
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'force-binary', '1');
-- succeeds, textual plugin, binary consumer
SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '0');
-- succeeds, binary plugin, binary consumer
SELECT data FROM pg_logical_slot_get_binary_changes('regression_slot', NULL, NULL, 'force-binary', '1');
SELECT 'init' FROM pg_drop_replication_slot('regression_slot');

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-- predictability
SET synchronous_commit = on;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
-- fail because of an already existing slot
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
-- fail because of an invalid name
SELECT 'init' FROM pg_create_logical_replication_slot('Invalid Name', 'test_decoding');
-- fail twice because of an invalid parameter values
SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'nonexistant-option', 'frakbar');
SELECT 'init' FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', 'frakbar');
-- succeed once
SELECT pg_drop_replication_slot('regression_slot');
-- fail
SELECT pg_drop_replication_slot('regression_slot');
-- check that we're detecting a streaming rep slot used for logical decoding
SELECT 'init' FROM pg_create_physical_replication_slot('repl');
SELECT data FROM pg_logical_slot_get_changes('repl', NULL, NULL, 'include-xids', '0');
SELECT pg_drop_replication_slot('repl');
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
/* check whether status function reports us, only reproduceable columns */
SELECT slot_name, plugin, slot_type, active,
NOT catalog_xmin IS NULL AS catalog_xmin_set,
xmin IS NULl AS data_xmin_not_set,
pg_xlog_location_diff(restart_lsn, '0/01000000') > 0 AS some_wal
FROM pg_replication_slots;
/*
* Check that changes are handled correctly when interleaved with ddl
*/
CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
BEGIN;
INSERT INTO replication_example(somedata, text) VALUES (1, 1);
INSERT INTO replication_example(somedata, text) VALUES (1, 2);
COMMIT;
ALTER TABLE replication_example ADD COLUMN bar int;
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 1, 4);
BEGIN;
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 2, 4);
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 3, 4);
INSERT INTO replication_example(somedata, text, bar) VALUES (2, 4, NULL);
COMMIT;
ALTER TABLE replication_example DROP COLUMN bar;
INSERT INTO replication_example(somedata, text) VALUES (3, 1);
BEGIN;
INSERT INTO replication_example(somedata, text) VALUES (3, 2);
INSERT INTO replication_example(somedata, text) VALUES (3, 3);
COMMIT;
ALTER TABLE replication_example RENAME COLUMN text TO somenum;
INSERT INTO replication_example(somedata, somenum) VALUES (4, 1);
-- collect all changes
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
ALTER TABLE replication_example ALTER COLUMN somenum TYPE int4 USING (somenum::int4);
-- throw away changes, they contain oids
SELECT count(data) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
INSERT INTO replication_example(somedata, somenum) VALUES (5, 1);
BEGIN;
INSERT INTO replication_example(somedata, somenum) VALUES (6, 1);
ALTER TABLE replication_example ADD COLUMN zaphod1 int;
INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 2, 1);
ALTER TABLE replication_example ADD COLUMN zaphod2 int;
INSERT INTO replication_example(somedata, somenum, zaphod2) VALUES (6, 3, 1);
INSERT INTO replication_example(somedata, somenum, zaphod1) VALUES (6, 4, 2);
COMMIT;
-- show changes
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
-- hide changes bc of oid visible in full table rewrites
CREATE TABLE tr_unique(id2 serial unique NOT NULL, data int);
INSERT INTO tr_unique(data) VALUES(10);
ALTER TABLE tr_unique RENAME TO tr_pkey;
ALTER TABLE tr_pkey ADD COLUMN id serial primary key;
SELECT count(data) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
INSERT INTO tr_pkey(data) VALUES(1);
--show deletion with primary key
DELETE FROM tr_pkey;
/* display results */
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
/*
* check that disk spooling works
*/
BEGIN;
CREATE TABLE tr_etoomuch (id serial primary key, data int);
INSERT INTO tr_etoomuch(data) SELECT g.i FROM generate_series(1, 10234) g(i);
DELETE FROM tr_etoomuch WHERE id < 5000;
UPDATE tr_etoomuch SET data = - data WHERE id > 5000;
COMMIT;
/* display results, but hide most of the output */
SELECT count(*), min(data), max(data)
FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0')
GROUP BY substring(data, 1, 24)
ORDER BY 1;
/*
* check whether we decode subtransactions correctly in relation with each
* other
*/
CREATE TABLE tr_sub (id serial primary key, path text);
-- toplevel, subtxn, toplevel, subtxn, subtxn
BEGIN;
INSERT INTO tr_sub(path) VALUES ('1-top-#1');
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('1-top-1-#1');
INSERT INTO tr_sub(path) VALUES ('1-top-1-#2');
RELEASE SAVEPOINT a;
SAVEPOINT b;
SAVEPOINT c;
INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#1');
INSERT INTO tr_sub(path) VALUES ('1-top-2-1-#2');
RELEASE SAVEPOINT c;
INSERT INTO tr_sub(path) VALUES ('1-top-2-#1');
RELEASE SAVEPOINT b;
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
-- check that we handle xlog assignments correctly
BEGIN;
-- nest 80 subtxns
SAVEPOINT subtop;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;SAVEPOINT a;
-- assign xid by inserting
INSERT INTO tr_sub(path) VALUES ('2-top-1...--#1');
INSERT INTO tr_sub(path) VALUES ('2-top-1...--#2');
INSERT INTO tr_sub(path) VALUES ('2-top-1...--#3');
RELEASE SAVEPOINT subtop;
INSERT INTO tr_sub(path) VALUES ('2-top-#1');
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
-- make sure rollbacked subtransactions aren't decoded
BEGIN;
INSERT INTO tr_sub(path) VALUES ('3-top-2-#1');
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('3-top-2-1-#1');
SAVEPOINT b;
INSERT INTO tr_sub(path) VALUES ('3-top-2-2-#1');
ROLLBACK TO SAVEPOINT b;
INSERT INTO tr_sub(path) VALUES ('3-top-2-#2');
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
-- test whether a known, but not yet logged toplevel xact, followed by a
-- subxact commit is handled correctly
BEGIN;
SELECT txid_current() != 0; -- so no fixed xid apears in the outfile
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('4-top-1-#1');
RELEASE SAVEPOINT a;
COMMIT;
-- test whether a change in a subtransaction, in an unknown toplevel
-- xact is handled correctly.
BEGIN;
SAVEPOINT a;
INSERT INTO tr_sub(path) VALUES ('5-top-1-#1');
COMMIT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
/*
* Check whether treating a table as a catalog table works somewhat
*/
CREATE TABLE replication_metadata (
id serial primary key,
relation name NOT NULL,
options text[]
)
WITH (user_catalog_table = true)
;
\d+ replication_metadata
INSERT INTO replication_metadata(relation, options)
VALUES ('foo', ARRAY['a', 'b']);
ALTER TABLE replication_metadata RESET (user_catalog_table);
\d+ replication_metadata
INSERT INTO replication_metadata(relation, options)
VALUES ('bar', ARRAY['a', 'b']);
ALTER TABLE replication_metadata SET (user_catalog_table = true);
\d+ replication_metadata
INSERT INTO replication_metadata(relation, options)
VALUES ('blub', NULL);
-- make sure rewrites don't work
ALTER TABLE replication_metadata ADD COLUMN rewritemeornot int;
ALTER TABLE replication_metadata ALTER COLUMN rewritemeornot TYPE text;
ALTER TABLE replication_metadata SET (user_catalog_table = false);
\d+ replication_metadata
INSERT INTO replication_metadata(relation, options)
VALUES ('zaphod', NULL);
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
/*
* check whether we handle updates/deletes correct with & without a pkey
*/
/* we should handle the case without a key at all more gracefully */
CREATE TABLE table_without_key(id serial, data int);
INSERT INTO table_without_key(data) VALUES(1),(2);
DELETE FROM table_without_key WHERE data = 1;
-- won't log old keys
UPDATE table_without_key SET data = 3 WHERE data = 2;
UPDATE table_without_key SET id = -id;
UPDATE table_without_key SET id = -id;
-- should log the full old row now
ALTER TABLE table_without_key REPLICA IDENTITY FULL;
UPDATE table_without_key SET data = 3 WHERE data = 2;
UPDATE table_without_key SET id = -id;
UPDATE table_without_key SET id = -id;
DELETE FROM table_without_key WHERE data = 3;
CREATE TABLE table_with_pkey(id serial primary key, data int);
INSERT INTO table_with_pkey(data) VALUES(1), (2);
DELETE FROM table_with_pkey WHERE data = 1;
-- should log the old pkey
UPDATE table_with_pkey SET data = 3 WHERE data = 2;
UPDATE table_with_pkey SET id = -id;
UPDATE table_with_pkey SET id = -id;
-- check that we log nothing despite having a pkey
ALTER TABLE table_without_key REPLICA IDENTITY NOTHING;
UPDATE table_with_pkey SET id = -id;
-- check that we log everything despite having a pkey
ALTER TABLE table_without_key REPLICA IDENTITY FULL;
UPDATE table_with_pkey SET id = -id;
DELETE FROM table_with_pkey WHERE data = 3;
CREATE TABLE table_with_unique_not_null(id serial unique, data int);
ALTER TABLE table_with_unique_not_null ALTER COLUMN id SET NOT NULL; --already set
-- won't log anything, replica identity not setup
INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
DELETE FROM table_with_unique_not_null WHERE data = 1;
UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
UPDATE table_with_unique_not_null SET id = -id;
UPDATE table_with_unique_not_null SET id = -id;
DELETE FROM table_with_unique_not_null WHERE data = 3;
-- should log old key
ALTER TABLE table_with_unique_not_null REPLICA IDENTITY USING INDEX table_with_unique_not_null_id_key;
INSERT INTO table_with_unique_not_null(data) VALUES(1), (2);
DELETE FROM table_with_unique_not_null WHERE data = 1;
UPDATE table_with_unique_not_null SET data = 3 WHERE data = 2;
UPDATE table_with_unique_not_null SET id = -id;
UPDATE table_with_unique_not_null SET id = -id;
DELETE FROM table_with_unique_not_null WHERE data = 3;
-- check toast support
BEGIN;
CREATE SEQUENCE toasttable_rand_seq START 79 INCREMENT 1499; -- portable "random"
CREATE TABLE toasttable(
id serial primary key,
toasted_col1 text,
rand1 float8 DEFAULT nextval('toasttable_rand_seq'),
toasted_col2 text,
rand2 float8 DEFAULT nextval('toasttable_rand_seq')
);
COMMIT;
-- uncompressed external toast data
INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
-- compressed external toast data
INSERT INTO toasttable(toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
-- update of existing column
UPDATE toasttable
SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
WHERE id = 1;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
INSERT INTO toasttable(toasted_col1) SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i);
-- update of second column, first column unchanged
UPDATE toasttable
SET toasted_col2 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i))
WHERE id = 1;
-- make sure we decode correctly even if the toast table is gone
DROP TABLE toasttable;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
-- done, free logical replication slot
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
SELECT pg_drop_replication_slot('regression_slot');
/* check that we aren't visible anymore now */
SELECT * FROM pg_stat_replication;

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-- predictability
SET synchronous_commit = on;
-- fail because we're creating a slot while in an xact with xid
BEGIN;
SELECT txid_current() = 0;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
ROLLBACK;
-- fail because we're creating a slot while in an subxact whose topxact has a xid
BEGIN;
SELECT txid_current() = 0;
SAVEPOINT barf;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
ROLLBACK TO SAVEPOINT barf;
ROLLBACK;
-- succeed, outside tx.
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
-- succeed, in tx without xid.
BEGIN;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
COMMIT;
CREATE TABLE nobarf(id serial primary key, data text);
INSERT INTO nobarf(data) VALUES('1');
-- decoding works in transaction with xid
BEGIN;
SELECT txid_current() = 0;
-- don't show yet, haven't committed
INSERT INTO nobarf(data) VALUES('2');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
COMMIT;
INSERT INTO nobarf(data) VALUES('3');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');

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-- predictability
SET synchronous_commit = on;
-- setup
CREATE ROLE lr_normal;
CREATE ROLE lr_superuser SUPERUSER;
CREATE ROLE lr_replication REPLICATION;
CREATE TABLE lr_test(data text);
-- superuser can control replication
SET ROLE lr_superuser;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
INSERT INTO lr_test VALUES('lr_superuser_init');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
SELECT pg_drop_replication_slot('regression_slot');
RESET ROLE;
-- replication user can control replication
SET ROLE lr_replication;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
INSERT INTO lr_test VALUES('lr_superuser_init');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
SELECT pg_drop_replication_slot('regression_slot');
RESET ROLE;
-- plain user *can't* can control replication
SET ROLE lr_normal;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
INSERT INTO lr_test VALUES('lr_superuser_init');
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
SELECT pg_drop_replication_slot('regression_slot');
RESET ROLE;
-- replication users can drop superuser created slots
SET ROLE lr_superuser;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
RESET ROLE;
SET ROLE lr_replication;
SELECT pg_drop_replication_slot('regression_slot');
RESET ROLE;
-- normal users can't drop existing slots
SET ROLE lr_superuser;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
RESET ROLE;
SET ROLE lr_normal;
SELECT pg_drop_replication_slot('regression_slot');
RESET ROLE;
-- all users can see existing slots
SET ROLE lr_superuser;
SELECT slot_name, plugin FROM pg_replication_slots;
RESET ROLE;
SET ROLE lr_replication;
SELECT slot_name, plugin FROM pg_replication_slots;
RESET ROLE;
SET ROLE lr_normal;
SELECT slot_name, plugin FROM pg_replication_slots;
RESET ROLE;
-- cleanup
SELECT pg_drop_replication_slot('regression_slot');
DROP ROLE lr_normal;
DROP ROLE lr_superuser;
DROP ROLE lr_replication;
DROP TABLE lr_test;

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-- predictability
SET synchronous_commit = on;
DROP TABLE IF EXISTS replication_example;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
CREATE TABLE replication_example(id SERIAL PRIMARY KEY, somedata int, text varchar(120));
INSERT INTO replication_example(somedata) VALUES (1);
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
BEGIN;
INSERT INTO replication_example(somedata) VALUES (2);
ALTER TABLE replication_example ADD COLUMN testcolumn1 int;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (3, 1);
COMMIT;
BEGIN;
INSERT INTO replication_example(somedata) VALUES (3);
ALTER TABLE replication_example ADD COLUMN testcolumn2 int;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn2) VALUES (4, 2, 1);
COMMIT;
VACUUM FULL pg_am;
VACUUM FULL pg_amop;
VACUUM FULL pg_proc;
VACUUM FULL pg_opclass;
VACUUM FULL pg_type;
VACUUM FULL pg_index;
VACUUM FULL pg_database;
-- repeated rewrites that fail
BEGIN;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
ROLLBACK;
-- repeated rewrites that succeed
BEGIN;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
CLUSTER pg_class USING pg_class_oid_index;
COMMIT;
-- repeated rewrites in different transactions
VACUUM FULL pg_class;
VACUUM FULL pg_class;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (5, 3);
BEGIN;
INSERT INTO replication_example(somedata, testcolumn1) VALUES (6, 4);
ALTER TABLE replication_example ADD COLUMN testcolumn3 int;
INSERT INTO replication_example(somedata, testcolumn1, testcolumn3) VALUES (7, 5, 1);
COMMIT;
-- make old files go away
CHECKPOINT;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
SELECT pg_drop_replication_slot('regression_slot');
DROP TABLE IF EXISTS replication_example;

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-- predictability
SET synchronous_commit = on;
DROP TABLE IF EXISTS xpto;
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'test_decoding');
CREATE SEQUENCE xpto_rand_seq START 79 INCREMENT 1499; -- portable "random"
CREATE TABLE xpto (
id serial primary key,
toasted_col1 text,
rand1 float8 DEFAULT nextval('xpto_rand_seq'),
toasted_col2 text,
rand2 float8 DEFAULT nextval('xpto_rand_seq')
);
-- uncompressed external toast data
INSERT INTO xpto (toasted_col1, toasted_col2) SELECT string_agg(g.i::text, ''), string_agg((g.i*2)::text, '') FROM generate_series(1, 2000) g(i);
-- compressed external toast data
INSERT INTO xpto (toasted_col2) SELECT repeat(string_agg(to_char(g.i, 'FM0000'), ''), 50) FROM generate_series(1, 500) g(i);
-- update of existing column
UPDATE xpto SET toasted_col1 = (SELECT string_agg(g.i::text, '') FROM generate_series(1, 2000) g(i)) WHERE id = 1;
UPDATE xpto SET rand1 = 123.456 WHERE id = 1;
DELETE FROM xpto WHERE id = 1;
DROP TABLE IF EXISTS toasted_key;
CREATE TABLE toasted_key (
id serial,
toasted_key text PRIMARY KEY,
toasted_col1 text,
toasted_col2 text
);
ALTER TABLE toasted_key ALTER COLUMN toasted_key SET STORAGE EXTERNAL;
ALTER TABLE toasted_key ALTER COLUMN toasted_col1 SET STORAGE EXTERNAL;
INSERT INTO toasted_key(toasted_key, toasted_col1) VALUES(repeat('1234567890', 200), repeat('9876543210', 200));
-- test update of a toasted key without changing it
UPDATE toasted_key SET toasted_col2 = toasted_col1;
-- test update of a toasted key, changing it
UPDATE toasted_key SET toasted_key = toasted_key || '1';
DELETE FROM toasted_key;
SELECT substr(data, 1, 200) FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'include-xids', '0');
SELECT pg_drop_replication_slot('regression_slot');

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/*-------------------------------------------------------------------------
*
* test_decoding.c
* example logical decoding output plugin
*
* Copyright (c) 2012-2014, PostgreSQL Global Development Group
*
* IDENTIFICATION
* contrib/test_decoding/test_decoding.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/sysattr.h"
#include "catalog/pg_class.h"
#include "catalog/pg_type.h"
#include "nodes/parsenodes.h"
#include "replication/output_plugin.h"
#include "replication/logical.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/memutils.h"
#include "utils/rel.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/typcache.h"
PG_MODULE_MAGIC;
extern void _PG_init(void);
extern void _PG_output_plugin_init(OutputPluginCallbacks *cb);
typedef struct
{
MemoryContext context;
bool include_xids;
bool include_timestamp;
} TestDecodingData;
/* These must be available to pg_dlsym() */
static void pg_decode_startup(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
bool is_init);
static void pg_decode_shutdown(LogicalDecodingContext *ctx);
static void pg_decode_begin_txn(LogicalDecodingContext *ctx,
ReorderBufferTXN *txn);
static void pg_decode_commit_txn(LogicalDecodingContext *ctx,
ReorderBufferTXN *txn, XLogRecPtr commit_lsn);
static void pg_decode_change(LogicalDecodingContext *ctx,
ReorderBufferTXN *txn, Relation rel,
ReorderBufferChange *change);
void
_PG_init(void)
{
/* other plugins can perform things here */
}
/* specify output plugin callbacks */
void
_PG_output_plugin_init(OutputPluginCallbacks *cb)
{
AssertVariableIsOfType(&_PG_output_plugin_init, LogicalOutputPluginInit);
cb->startup_cb = pg_decode_startup;
cb->begin_cb = pg_decode_begin_txn;
cb->change_cb = pg_decode_change;
cb->commit_cb = pg_decode_commit_txn;
cb->shutdown_cb = pg_decode_shutdown;
}
/* initialize this plugin */
static void
pg_decode_startup(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
bool is_init)
{
ListCell *option;
TestDecodingData *data;
data = palloc(sizeof(TestDecodingData));
data->context = AllocSetContextCreate(ctx->context,
"text conversion context",
ALLOCSET_DEFAULT_MINSIZE,
ALLOCSET_DEFAULT_INITSIZE,
ALLOCSET_DEFAULT_MAXSIZE);
data->include_xids = true;
data->include_timestamp = false;
ctx->output_plugin_private = data;
opt->output_type = OUTPUT_PLUGIN_TEXTUAL_OUTPUT;
foreach(option, ctx->output_plugin_options)
{
DefElem *elem = lfirst(option);
Assert(elem->arg == NULL || IsA(elem->arg, String));
if (strcmp(elem->defname, "include-xids") == 0)
{
/* if option does not provide a value, it means its value is true */
if (elem->arg == NULL)
data->include_xids = true;
else if (!parse_bool(strVal(elem->arg), &data->include_xids))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("could not parse value \"%s\" for parameter \"%s\"",
strVal(elem->arg), elem->defname)));
}
else if (strcmp(elem->defname, "include-timestamp") == 0)
{
if (elem->arg == NULL)
data->include_timestamp = true;
else if (!parse_bool(strVal(elem->arg), &data->include_timestamp))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("could not parse value \"%s\" for parameter \"%s\"",
strVal(elem->arg), elem->defname)));
}
else if (strcmp(elem->defname, "force-binary") == 0)
{
bool force_binary;
if (elem->arg == NULL)
continue;
else if (!parse_bool(strVal(elem->arg), &force_binary))
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("could not parse value \"%s\" for parameter \"%s\"",
strVal(elem->arg), elem->defname)));
if (force_binary)
opt->output_type = OUTPUT_PLUGIN_BINARY_OUTPUT;
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("option \"%s\" = \"%s\" is unknown",
elem->defname,
elem->arg ? strVal(elem->arg) : "(null)")));
}
}
}
/* cleanup this plugin's resources */
static void
pg_decode_shutdown(LogicalDecodingContext *ctx)
{
TestDecodingData *data = ctx->output_plugin_private;
/* cleanup our own resources via memory context reset */
MemoryContextDelete(data->context);
}
/* BEGIN callback */
static void
pg_decode_begin_txn(LogicalDecodingContext *ctx, ReorderBufferTXN *txn)
{
TestDecodingData *data = ctx->output_plugin_private;
OutputPluginPrepareWrite(ctx, true);
if (data->include_xids)
appendStringInfo(ctx->out, "BEGIN %u", txn->xid);
else
appendStringInfoString(ctx->out, "BEGIN");
OutputPluginWrite(ctx, true);
}
/* COMMIT callback */
static void
pg_decode_commit_txn(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
XLogRecPtr commit_lsn)
{
TestDecodingData *data = ctx->output_plugin_private;
OutputPluginPrepareWrite(ctx, true);
if (data->include_xids)
appendStringInfo(ctx->out, "COMMIT %u", txn->xid);
else
appendStringInfoString(ctx->out, "COMMIT");
if (data->include_timestamp)
appendStringInfo(ctx->out, " (at %s)",
timestamptz_to_str(txn->commit_time));
OutputPluginWrite(ctx, true);
}
/*
* Print literal `outputstr' already represented as string of type `typid'
* into stringbuf `s'.
*
* Some builtin types aren't quoted, the rest is quoted. Escaping is done as
* if standard_conforming_strings were enabled.
*/
static void
print_literal(StringInfo s, Oid typid, char *outputstr)
{
const char *valptr;
switch (typid)
{
case INT2OID:
case INT4OID:
case INT8OID:
case OIDOID:
case FLOAT4OID:
case FLOAT8OID:
case NUMERICOID:
/* NB: We don't care about Inf, NaN et al. */
appendStringInfoString(s, outputstr);
break;
case BITOID:
case VARBITOID:
appendStringInfo(s, "B'%s'", outputstr);
break;
case BOOLOID:
if (strcmp(outputstr, "t") == 0)
appendStringInfoString(s, "true");
else
appendStringInfoString(s, "false");
break;
default:
appendStringInfoChar(s, '\'');
for (valptr = outputstr; *valptr; valptr++)
{
char ch = *valptr;
if (SQL_STR_DOUBLE(ch, false))
appendStringInfoChar(s, ch);
appendStringInfoChar(s, ch);
}
appendStringInfoChar(s, '\'');
break;
}
}
/* print the tuple 'tuple' into the StringInfo s */
static void
tuple_to_stringinfo(StringInfo s, TupleDesc tupdesc, HeapTuple tuple, bool skip_nulls)
{
int natt;
Oid oid;
/* print oid of tuple, it's not included in the TupleDesc */
if ((oid = HeapTupleHeaderGetOid(tuple->t_data)) != InvalidOid)
{
appendStringInfo(s, " oid[oid]:%u", oid);
}
/* print all columns individually */
for (natt = 0; natt < tupdesc->natts; natt++)
{
Form_pg_attribute attr; /* the attribute itself */
Oid typid; /* type of current attribute */
Oid typoutput; /* output function */
bool typisvarlena;
Datum origval; /* possibly toasted Datum */
bool isnull; /* column is null? */
attr = tupdesc->attrs[natt];
/*
* don't print dropped columns, we can't be sure everything is
* available for them
*/
if (attr->attisdropped)
continue;
/*
* Don't print system columns, oid will already have been printed if
* present.
*/
if (attr->attnum < 0)
continue;
typid = attr->atttypid;
/* get Datum from tuple */
origval = fastgetattr(tuple, natt + 1, tupdesc, &isnull);
if (isnull && skip_nulls)
continue;
/* print attribute name */
appendStringInfoChar(s, ' ');
appendStringInfoString(s, quote_identifier(NameStr(attr->attname)));
/* print attribute type */
appendStringInfoChar(s, '[');
appendStringInfoString(s, format_type_be(typid));
appendStringInfoChar(s, ']');
/* query output function */
getTypeOutputInfo(typid,
&typoutput, &typisvarlena);
/* print separator */
appendStringInfoChar(s, ':');
/* print data */
if (isnull)
appendStringInfoString(s, "null");
else if (typisvarlena && VARATT_IS_EXTERNAL_ONDISK(origval))
appendStringInfoString(s, "unchanged-toast-datum");
else if (!typisvarlena)
print_literal(s, typid,
OidOutputFunctionCall(typoutput, origval));
else
{
Datum val; /* definitely detoasted Datum */
val = PointerGetDatum(PG_DETOAST_DATUM(origval));
print_literal(s, typid, OidOutputFunctionCall(typoutput, val));
}
}
}
/*
* callback for individual changed tuples
*/
static void
pg_decode_change(LogicalDecodingContext *ctx, ReorderBufferTXN *txn,
Relation relation, ReorderBufferChange *change)
{
TestDecodingData *data;
Form_pg_class class_form;
TupleDesc tupdesc;
MemoryContext old;
data = ctx->output_plugin_private;
class_form = RelationGetForm(relation);
tupdesc = RelationGetDescr(relation);
/* Avoid leaking memory by using and resetting our own context */
old = MemoryContextSwitchTo(data->context);
OutputPluginPrepareWrite(ctx, true);
appendStringInfoString(ctx->out, "table ");
appendStringInfoString(ctx->out,
quote_qualified_identifier(
get_namespace_name(
get_rel_namespace(RelationGetRelid(relation))),
NameStr(class_form->relname)));
appendStringInfoString(ctx->out, ":");
switch (change->action)
{
case REORDER_BUFFER_CHANGE_INSERT:
appendStringInfoString(ctx->out, " INSERT:");
if (change->tp.newtuple == NULL)
appendStringInfoString(ctx->out, " (no-tuple-data)");
else
tuple_to_stringinfo(ctx->out, tupdesc,
&change->tp.newtuple->tuple,
false);
break;
case REORDER_BUFFER_CHANGE_UPDATE:
appendStringInfoString(ctx->out, " UPDATE:");
if (change->tp.oldtuple != NULL)
{
appendStringInfoString(ctx->out, " old-key:");
tuple_to_stringinfo(ctx->out, tupdesc,
&change->tp.oldtuple->tuple,
true);
appendStringInfoString(ctx->out, " new-tuple:");
}
if (change->tp.newtuple == NULL)
appendStringInfoString(ctx->out, " (no-tuple-data)");
else
tuple_to_stringinfo(ctx->out, tupdesc,
&change->tp.newtuple->tuple,
false);
break;
case REORDER_BUFFER_CHANGE_DELETE:
appendStringInfoString(ctx->out, " DELETE:");
/* if there was no PK, we only know that a delete happened */
if (change->tp.oldtuple == NULL)
appendStringInfoString(ctx->out, " (no-tuple-data)");
/* In DELETE, only the replica identity is present; display that */
else
tuple_to_stringinfo(ctx->out, tupdesc,
&change->tp.oldtuple->tuple,
true);
break;
}
MemoryContextSwitchTo(old);
MemoryContextReset(data->context);
OutputPluginWrite(ctx, true);
}