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pg_partition_ancestors

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Adds another introspection feature for partitioning, necessary for
further psql patches.

Reviewed-by: Michaël Paquier
Discussion: https://postgr.es/m/20190226222757.GA31622@alvherre.pgsql
This commit is contained in:
Alvaro Herrera
2019-03-04 16:14:29 -03:00
parent d12fbe2f8e
commit b96f6b1948
6 changed files with 144 additions and 1 deletions
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65
src/test/regress/expected/partition_info.out
View File

@ -11,6 +11,16 @@ SELECT * FROM pg_partition_tree(0);
-------+-------------+--------+-------
(0 rows)
SELECT * FROM pg_partition_ancestors(NULL);
relid
-------
(0 rows)
SELECT * FROM pg_partition_ancestors(0);
relid
-------
(0 rows)
SELECT pg_partition_root(NULL);
pg_partition_root
-------------------
@ -92,6 +102,21 @@ SELECT relid, parentrelid, level, isleaf
ptif_test3 | ptif_test | 0 | f
(1 row)
-- List all ancestors of root and leaf tables
SELECT * FROM pg_partition_ancestors('ptif_test01');
relid
-------------
ptif_test01
ptif_test0
ptif_test
(3 rows)
SELECT * FROM pg_partition_ancestors('ptif_test');
relid
-----------
ptif_test
(1 row)
-- List all members using pg_partition_root with leaf table reference
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree(pg_partition_root('ptif_test01')) p
@ -164,6 +189,21 @@ SELECT relid, parentrelid, level, isleaf
ptif_test11_index | ptif_test1_index | 2 | t
(7 rows)
-- List all ancestors of root and leaf indexes
SELECT * FROM pg_partition_ancestors('ptif_test01_index');
relid
-------------------
ptif_test01_index
ptif_test0_index
ptif_test_index
(3 rows)
SELECT * FROM pg_partition_ancestors('ptif_test_index');
relid
-----------------
ptif_test_index
(1 row)
DROP TABLE ptif_test;
-- Table that is not part of any partition tree is not listed.
CREATE TABLE ptif_normal_table(a int);
@ -173,6 +213,11 @@ SELECT relid, parentrelid, level, isleaf
-------+-------------+-------+--------
(0 rows)
SELECT * FROM pg_partition_ancestors('ptif_normal_table');
relid
-------
(0 rows)
SELECT pg_partition_root('ptif_normal_table');
pg_partition_root
-------------------
@ -207,6 +252,26 @@ SELECT * FROM pg_partition_tree('ptif_li_child');
-------+-------------+--------+-------
(0 rows)
SELECT * FROM pg_partition_ancestors('ptif_test_view');
relid
-------
(0 rows)
SELECT * FROM pg_partition_ancestors('ptif_test_matview');
relid
-------
(0 rows)
SELECT * FROM pg_partition_ancestors('ptif_li_parent');
relid
-------
(0 rows)
SELECT * FROM pg_partition_ancestors('ptif_li_child');
relid
-------
(0 rows)
SELECT pg_partition_root('ptif_test_view');
pg_partition_root
-------------------

13
src/test/regress/sql/partition_info.sql
View File

@ -3,6 +3,8 @@
--
SELECT * FROM pg_partition_tree(NULL);
SELECT * FROM pg_partition_tree(0);
SELECT * FROM pg_partition_ancestors(NULL);
SELECT * FROM pg_partition_ancestors(0);
SELECT pg_partition_root(NULL);
SELECT pg_partition_root(0);
@ -50,6 +52,9 @@ SELECT relid, parentrelid, level, isleaf
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test3') p
JOIN pg_class c ON (p.relid = c.oid);
-- List all ancestors of root and leaf tables
SELECT * FROM pg_partition_ancestors('ptif_test01');
SELECT * FROM pg_partition_ancestors('ptif_test');
-- List all members using pg_partition_root with leaf table reference
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree(pg_partition_root('ptif_test01')) p
@ -74,6 +79,9 @@ SELECT relid, parentrelid, level, isleaf
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree(pg_partition_root('ptif_test01_index')) p
JOIN pg_class c ON (p.relid = c.oid);
-- List all ancestors of root and leaf indexes
SELECT * FROM pg_partition_ancestors('ptif_test01_index');
SELECT * FROM pg_partition_ancestors('ptif_test_index');
DROP TABLE ptif_test;
@ -81,6 +89,7 @@ DROP TABLE ptif_test;
CREATE TABLE ptif_normal_table(a int);
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_normal_table');
SELECT * FROM pg_partition_ancestors('ptif_normal_table');
SELECT pg_partition_root('ptif_normal_table');
DROP TABLE ptif_normal_table;
@ -95,6 +104,10 @@ SELECT * FROM pg_partition_tree('ptif_test_view');
SELECT * FROM pg_partition_tree('ptif_test_matview');
SELECT * FROM pg_partition_tree('ptif_li_parent');
SELECT * FROM pg_partition_tree('ptif_li_child');
SELECT * FROM pg_partition_ancestors('ptif_test_view');
SELECT * FROM pg_partition_ancestors('ptif_test_matview');
SELECT * FROM pg_partition_ancestors('ptif_li_parent');
SELECT * FROM pg_partition_ancestors('ptif_li_child');
SELECT pg_partition_root('ptif_test_view');
SELECT pg_partition_root('ptif_test_matview');
SELECT pg_partition_root('ptif_li_parent');