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pg_stat_statements: Expand tests for SET statements

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There are many grammar flavors that depend on the parse node
VariableSetStmt.  This closes the gap in pg_stat_statements by providing
test coverage for what should be a large majority of them, improving more
the work begun in de2aca2885.  This will be used to ease the
evaluation of a path towards more normalization of SET queries with
query jumbling.

Note that SET NAMES (grammar from the standard, synonym of SET
client_encoding) is omitted on purpose, this could use UTF8 with a
conditional script where UTF8 is supported, but that does not seem worth
the maintenance cost for the sake of these tests.

The author has submitted most of these in a TAP test (filled in any
holes I could spot), still queries in a SQL file of pg_stat_statements
is able to achieve the same goal while being easier to look at when
testing normalization patterns.

Author: Greg Sabino Mullane, Michael Paquier
Discussion: https://postgr.es/m/CAKAnmmJtJY2jzQN91=2QAD2eAJAA-Per61eyO48-TyxEg-q0Rg@mail.gmail.com
This commit is contained in:
Michael Paquier
2024-09-25 10:04:44 +09:00
parent aac2c9b4fd
commit ba90eac7a9
2 changed files with 132 additions and 10 deletions
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47
contrib/pg_stat_statements/sql/utility.sql
View File

@ -47,7 +47,8 @@ DROP FOREIGN DATA WRAPPER wrapper_stats;
-- Functions
CREATE FUNCTION func_stats(a text DEFAULT 'a_data', b text DEFAULT lower('b_data'))
RETURNS text AS $$ SELECT $1::text || '_' || $2::text; $$ LANGUAGE SQL;
RETURNS text AS $$ SELECT $1::text || '_' || $2::text; $$ LANGUAGE SQL
SET work_mem = '256kB';
DROP FUNCTION func_stats;
-- Rules
@ -277,12 +278,26 @@ SELECT pg_stat_statements_reset() IS NOT NULL AS t;
-- SET statements.
-- These use two different strings, still they count as one entry.
CREATE ROLE regress_stat_set_1;
CREATE ROLE regress_stat_set_2;
SET work_mem = '1MB';
Set work_mem = '1MB';
SET work_mem = '2MB';
SET work_mem = DEFAULT;
SET work_mem TO DEFAULT;
SET work_mem FROM CURRENT;
BEGIN;
SET LOCAL work_mem = '128kB';
SET LOCAL work_mem = '256kB';
SET LOCAL work_mem = DEFAULT;
SET LOCAL work_mem TO DEFAULT;
SET LOCAL work_mem FROM CURRENT;
COMMIT;
RESET work_mem;
SET enable_seqscan = off;
SET enable_seqscan = on;
SET SESSION work_mem = '300kB';
SET SESSION work_mem = '400kB';
RESET enable_seqscan;
-- SET TRANSACTION ISOLATION
BEGIN;
@ -290,15 +305,35 @@ SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
COMMIT;
-- SET SESSION CHARACTERISTICS
-- SET SESSION AUTHORIZATION
SET SESSION SESSION AUTHORIZATION DEFAULT;
SET SESSION AUTHORIZATION 'regress_stat_set_1';
SET SESSION AUTHORIZATION 'regress_stat_set_2';
RESET SESSION AUTHORIZATION;
BEGIN;
SET LOCAL SESSION AUTHORIZATION DEFAULT;
SET LOCAL SESSION AUTHORIZATION 'regress_stat_set_1';
SET LOCAL SESSION AUTHORIZATION 'regress_stat_set_2';
RESET SESSION AUTHORIZATION;
COMMIT;
-- SET SESSION CHARACTERISTICS
SET SESSION CHARACTERISTICS AS TRANSACTION READ ONLY;
SET SESSION CHARACTERISTICS AS TRANSACTION READ ONLY, READ ONLY;
SET SESSION CHARACTERISTICS AS TRANSACTION READ ONLY, READ WRITE;
-- SET XML OPTION
SET XML OPTION DOCUMENT;
SET XML OPTION CONTENT;
-- SET TIME ZONE
SET TIME ZONE 'America/New_York';
SET TIME ZONE 'Asia/Tokyo';
SET TIME ZONE DEFAULT;
SET TIME ZONE LOCAL;
SET TIME ZONE 'CST7CDT,M4.1.0,M10.5.0';
RESET TIME ZONE;
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
DROP ROLE regress_stat_set_1;
DROP ROLE regress_stat_set_2;
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
--
@ -329,3 +364,11 @@ DROP TABLE pgss_ctas;
DROP TABLE pgss_select_into;
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
-- Special cases. Keep these ones at the end to avoid conflicts.
SET SCHEMA 'foo';
SET SCHEMA 'public';
RESET ALL;
SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
SELECT pg_stat_statements_reset() IS NOT NULL AS t;