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--
-- Tests for functions providing information about partitions
--
SELECT * FROM pg_partition_tree(NULL);
relid | parentrelid | isleaf | level
-------+-------------+--------+-------
(0 rows)
SELECT * FROM pg_partition_tree(0);
relid | parentrelid | isleaf | level
-------+-------------+--------+-------
(0 rows)
SELECT pg_partition_root(NULL);
pg_partition_root
-------------------
(1 row)
SELECT pg_partition_root(0);
pg_partition_root
-------------------
(1 row)
-- Test table partition trees
CREATE TABLE ptif_test (a int, b int) PARTITION BY range (a);
CREATE TABLE ptif_test0 PARTITION OF ptif_test
FOR VALUES FROM (minvalue) TO (0) PARTITION BY list (b);
CREATE TABLE ptif_test01 PARTITION OF ptif_test0 FOR VALUES IN (1);
CREATE TABLE ptif_test1 PARTITION OF ptif_test
FOR VALUES FROM (0) TO (100) PARTITION BY list (b);
CREATE TABLE ptif_test11 PARTITION OF ptif_test1 FOR VALUES IN (1);
CREATE TABLE ptif_test2 PARTITION OF ptif_test
FOR VALUES FROM (100) TO (200);
-- This partitioned table should remain with no partitions.
CREATE TABLE ptif_test3 PARTITION OF ptif_test
FOR VALUES FROM (200) TO (maxvalue) PARTITION BY list (b);
-- Test index partition tree
CREATE INDEX ptif_test_index ON ONLY ptif_test (a);
CREATE INDEX ptif_test0_index ON ONLY ptif_test0 (a);
ALTER INDEX ptif_test_index ATTACH PARTITION ptif_test0_index;
CREATE INDEX ptif_test01_index ON ptif_test01 (a);
ALTER INDEX ptif_test0_index ATTACH PARTITION ptif_test01_index;
CREATE INDEX ptif_test1_index ON ONLY ptif_test1 (a);
ALTER INDEX ptif_test_index ATTACH PARTITION ptif_test1_index;
CREATE INDEX ptif_test11_index ON ptif_test11 (a);
ALTER INDEX ptif_test1_index ATTACH PARTITION ptif_test11_index;
CREATE INDEX ptif_test2_index ON ptif_test2 (a);
ALTER INDEX ptif_test_index ATTACH PARTITION ptif_test2_index;
CREATE INDEX ptif_test3_index ON ptif_test3 (a);
ALTER INDEX ptif_test_index ATTACH PARTITION ptif_test3_index;
-- List all tables members of the tree
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test');
relid | parentrelid | level | isleaf
-------------+-------------+-------+--------
ptif_test | | 0 | f
ptif_test0 | ptif_test | 1 | f
ptif_test1 | ptif_test | 1 | f
ptif_test2 | ptif_test | 1 | t
ptif_test3 | ptif_test | 1 | f
ptif_test01 | ptif_test0 | 2 | t
ptif_test11 | ptif_test1 | 2 | t
(7 rows)
-- List tables from an intermediate level
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test0') p
JOIN pg_class c ON (p.relid = c.oid);
relid | parentrelid | level | isleaf
-------------+-------------+-------+--------
ptif_test0 | ptif_test | 0 | f
ptif_test01 | ptif_test0 | 1 | t
(2 rows)
-- List from leaf table
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test01') p
JOIN pg_class c ON (p.relid = c.oid);
relid | parentrelid | level | isleaf
-------------+-------------+-------+--------
ptif_test01 | ptif_test0 | 0 | t
(1 row)
-- List from partitioned table with no partitions
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test3') p
JOIN pg_class c ON (p.relid = c.oid);
relid | parentrelid | level | isleaf
------------+-------------+-------+--------
ptif_test3 | ptif_test | 0 | f
(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
JOIN pg_class c ON (p.relid = c.oid);
relid | parentrelid | level | isleaf
-------------+-------------+-------+--------
ptif_test | | 0 | f
ptif_test0 | ptif_test | 1 | f
ptif_test1 | ptif_test | 1 | f
ptif_test2 | ptif_test | 1 | t
ptif_test3 | ptif_test | 1 | f
ptif_test01 | ptif_test0 | 2 | t
ptif_test11 | ptif_test1 | 2 | t
(7 rows)
-- List all indexes members of the tree
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test_index');
relid | parentrelid | level | isleaf
-------------------+------------------+-------+--------
ptif_test_index | | 0 | f
ptif_test0_index | ptif_test_index | 1 | f
ptif_test1_index | ptif_test_index | 1 | f
ptif_test2_index | ptif_test_index | 1 | t
ptif_test3_index | ptif_test_index | 1 | f
ptif_test01_index | ptif_test0_index | 2 | t
ptif_test11_index | ptif_test1_index | 2 | t
(7 rows)
-- List indexes from an intermediate level
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test0_index') p
JOIN pg_class c ON (p.relid = c.oid);
relid | parentrelid | level | isleaf
-------------------+------------------+-------+--------
ptif_test0_index | ptif_test_index | 0 | f
ptif_test01_index | ptif_test0_index | 1 | t
(2 rows)
-- List from leaf index
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test01_index') p
JOIN pg_class c ON (p.relid = c.oid);
relid | parentrelid | level | isleaf
-------------------+------------------+-------+--------
ptif_test01_index | ptif_test0_index | 0 | t
(1 row)
-- List from partitioned index with no partitions
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_test3_index') p
JOIN pg_class c ON (p.relid = c.oid);
relid | parentrelid | level | isleaf
------------------+-----------------+-------+--------
ptif_test3_index | ptif_test_index | 0 | f
(1 row)
-- List all members using pg_partition_root with leaf index reference
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);
relid | parentrelid | level | isleaf
-------------------+------------------+-------+--------
ptif_test_index | | 0 | f
ptif_test0_index | ptif_test_index | 1 | f
ptif_test1_index | ptif_test_index | 1 | f
ptif_test2_index | ptif_test_index | 1 | t
ptif_test3_index | ptif_test_index | 1 | f
ptif_test01_index | ptif_test0_index | 2 | t
ptif_test11_index | ptif_test1_index | 2 | t
(7 rows)
DROP TABLE ptif_test;
-- Table that is not part of any partition tree is not listed.
CREATE TABLE ptif_normal_table(a int);
SELECT relid, parentrelid, level, isleaf
FROM pg_partition_tree('ptif_normal_table');
relid | parentrelid | level | isleaf
-------+-------------+-------+--------
(0 rows)
SELECT pg_partition_root('ptif_normal_table');
pg_partition_root
-------------------
(1 row)
DROP TABLE ptif_normal_table;
-- Various partitioning-related functions return NULL if passed relations
-- of types that cannot be part of a partition tree; for example, views,
-- materialized views, etc.
CREATE VIEW ptif_test_view AS SELECT 1;
CREATE MATERIALIZED VIEW ptif_test_matview AS SELECT 1;
SELECT * FROM pg_partition_tree('ptif_test_view');
relid | parentrelid | isleaf | level
-------+-------------+--------+-------
(0 rows)
SELECT * FROM pg_partition_tree('ptif_test_matview');
relid | parentrelid | isleaf | level
-------+-------------+--------+-------
(0 rows)
SELECT pg_partition_root('ptif_test_view');
pg_partition_root
-------------------
(1 row)
SELECT pg_partition_root('ptif_test_matview');
pg_partition_root
-------------------
(1 row)
DROP VIEW ptif_test_view;
DROP MATERIALIZED VIEW ptif_test_matview;
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