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/*
* 1.test CREATE INDEX
*
* Deliberately avoid dropping objects in this section, to get some pg_dump
* coverage.
*/
-- Regular index with included columns
CREATE TABLE tbl_include_reg (c1 int, c2 int, c3 int, c4 box);
INSERT INTO tbl_include_reg SELECT x, 2*x, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
CREATE INDEX tbl_include_reg_idx ON tbl_include_reg (c1, c2) INCLUDE (c3, c4);
-- duplicate column is pretty pointless, but we allow it anyway
CREATE INDEX ON tbl_include_reg (c1, c2) INCLUDE (c1, c3);
SELECT pg_get_indexdef(i.indexrelid)
FROM pg_index i JOIN pg_class c ON i.indexrelid = c.oid
WHERE i.indrelid = 'tbl_include_reg'::regclass ORDER BY c.relname;
pg_get_indexdef
---------------------------------------------------------------------------------------------------------------
CREATE INDEX tbl_include_reg_c1_c2_c11_c3_idx ON public.tbl_include_reg USING btree (c1, c2) INCLUDE (c1, c3)
CREATE INDEX tbl_include_reg_idx ON public.tbl_include_reg USING btree (c1, c2) INCLUDE (c3, c4)
(2 rows)
\d tbl_include_reg_idx
Index "public.tbl_include_reg_idx"
Column | Type | Key? | Definition
--------+---------+------+------------
c1 | integer | yes | c1
c2 | integer | yes | c2
c3 | integer | no | c3
c4 | box | no | c4
btree, for table "public.tbl_include_reg"
-- Unique index and unique constraint
CREATE TABLE tbl_include_unique1 (c1 int, c2 int, c3 int, c4 box);
INSERT INTO tbl_include_unique1 SELECT x, 2*x, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
CREATE UNIQUE INDEX tbl_include_unique1_idx_unique ON tbl_include_unique1 using btree (c1, c2) INCLUDE (c3, c4);
ALTER TABLE tbl_include_unique1 add UNIQUE USING INDEX tbl_include_unique1_idx_unique;
ALTER TABLE tbl_include_unique1 add UNIQUE (c1, c2) INCLUDE (c3, c4);
SELECT pg_get_indexdef(i.indexrelid)
FROM pg_index i JOIN pg_class c ON i.indexrelid = c.oid
WHERE i.indrelid = 'tbl_include_unique1'::regclass ORDER BY c.relname;
pg_get_indexdef
-----------------------------------------------------------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_include_unique1_c1_c2_c3_c4_key ON public.tbl_include_unique1 USING btree (c1, c2) INCLUDE (c3, c4)
CREATE UNIQUE INDEX tbl_include_unique1_idx_unique ON public.tbl_include_unique1 USING btree (c1, c2) INCLUDE (c3, c4)
(2 rows)
-- Unique index and unique constraint. Both must fail.
CREATE TABLE tbl_include_unique2 (c1 int, c2 int, c3 int, c4 box);
INSERT INTO tbl_include_unique2 SELECT 1, 2, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
CREATE UNIQUE INDEX tbl_include_unique2_idx_unique ON tbl_include_unique2 using btree (c1, c2) INCLUDE (c3, c4);
ERROR: could not create unique index "tbl_include_unique2_idx_unique"
DETAIL: Key (c1, c2)=(1, 2) is duplicated.
ALTER TABLE tbl_include_unique2 add UNIQUE (c1, c2) INCLUDE (c3, c4);
ERROR: could not create unique index "tbl_include_unique2_c1_c2_c3_c4_key"
DETAIL: Key (c1, c2)=(1, 2) is duplicated.
-- PK constraint
CREATE TABLE tbl_include_pk (c1 int, c2 int, c3 int, c4 box);
INSERT INTO tbl_include_pk SELECT 1, 2*x, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ALTER TABLE tbl_include_pk add PRIMARY KEY (c1, c2) INCLUDE (c3, c4);
SELECT pg_get_indexdef(i.indexrelid)
FROM pg_index i JOIN pg_class c ON i.indexrelid = c.oid
WHERE i.indrelid = 'tbl_include_pk'::regclass ORDER BY c.relname;
pg_get_indexdef
--------------------------------------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_include_pk_pkey ON public.tbl_include_pk USING btree (c1, c2) INCLUDE (c3, c4)
(1 row)
CREATE TABLE tbl_include_box (c1 int, c2 int, c3 int, c4 box);
INSERT INTO tbl_include_box SELECT 1, 2*x, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
CREATE UNIQUE INDEX tbl_include_box_idx_unique ON tbl_include_box using btree (c1, c2) INCLUDE (c3, c4);
ALTER TABLE tbl_include_box add PRIMARY KEY USING INDEX tbl_include_box_idx_unique;
SELECT pg_get_indexdef(i.indexrelid)
FROM pg_index i JOIN pg_class c ON i.indexrelid = c.oid
WHERE i.indrelid = 'tbl_include_box'::regclass ORDER BY c.relname;
pg_get_indexdef
----------------------------------------------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_include_box_idx_unique ON public.tbl_include_box USING btree (c1, c2) INCLUDE (c3, c4)
(1 row)
-- PK constraint. Must fail.
CREATE TABLE tbl_include_box_pk (c1 int, c2 int, c3 int, c4 box);
INSERT INTO tbl_include_box_pk SELECT 1, 2, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ALTER TABLE tbl_include_box_pk add PRIMARY KEY (c1, c2) INCLUDE (c3, c4);
ERROR: could not create unique index "tbl_include_box_pk_pkey"
DETAIL: Key (c1, c2)=(1, 2) is duplicated.
/*
* 2. Test CREATE TABLE with constraint
*/
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box,
CONSTRAINT covering UNIQUE(c1,c2) INCLUDE(c3,c4));
SELECT indexrelid::regclass, indnatts, indnkeyatts, indisunique, indisprimary, indkey, indclass FROM pg_index WHERE indrelid = 'tbl'::regclass::oid;
indexrelid | indnatts | indnkeyatts | indisunique | indisprimary | indkey | indclass
------------+----------+-------------+-------------+--------------+---------+-----------
covering | 4 | 2 | t | f | 1 2 3 4 | 1978 1978
(1 row)
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'tbl'::regclass::oid;
pg_get_constraintdef | conname | conkey
----------------------------------+----------+--------
UNIQUE (c1, c2) INCLUDE (c3, c4) | covering | {1,2}
(1 row)
-- ensure that constraint works
INSERT INTO tbl SELECT 1, 2, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ERROR: duplicate key value violates unique constraint "covering"
DETAIL: Key (c1, c2)=(1, 2) already exists.
DROP TABLE tbl;
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box,
CONSTRAINT covering PRIMARY KEY(c1,c2) INCLUDE(c3,c4));
SELECT indexrelid::regclass, indnatts, indnkeyatts, indisunique, indisprimary, indkey, indclass FROM pg_index WHERE indrelid = 'tbl'::regclass::oid;
indexrelid | indnatts | indnkeyatts | indisunique | indisprimary | indkey | indclass
------------+----------+-------------+-------------+--------------+---------+-----------
covering | 4 | 2 | t | t | 1 2 3 4 | 1978 1978
(1 row)
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'tbl'::regclass::oid;
pg_get_constraintdef | conname | conkey
---------------------------------------+----------+--------
PRIMARY KEY (c1, c2) INCLUDE (c3, c4) | covering | {1,2}
(1 row)
-- ensure that constraint works
INSERT INTO tbl SELECT 1, 2, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ERROR: duplicate key value violates unique constraint "covering"
DETAIL: Key (c1, c2)=(1, 2) already exists.
INSERT INTO tbl SELECT 1, NULL, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ERROR: null value in column "c2" of relation "tbl" violates not-null constraint
DETAIL: Failing row contains (1, null, 3, (4,4),(4,4)).
INSERT INTO tbl SELECT x, 2*x, NULL, NULL FROM generate_series(1,300) AS x;
explain (costs off)
select * from tbl where (c1,c2,c3) < (2,5,1);
QUERY PLAN
------------------------------------------------
Bitmap Heap Scan on tbl
Filter: (ROW(c1, c2, c3) < ROW(2, 5, 1))
-> Bitmap Index Scan on covering
Index Cond: (ROW(c1, c2) <= ROW(2, 5))
(4 rows)
select * from tbl where (c1,c2,c3) < (2,5,1);
c1 | c2 | c3 | c4
----+----+----+----
1 | 2 | |
2 | 4 | |
(2 rows)
-- row comparison that compares high key at page boundary
SET enable_seqscan = off;
explain (costs off)
select * from tbl where (c1,c2,c3) < (262,1,1) limit 1;
QUERY PLAN
----------------------------------------------------
Limit
-> Index Only Scan using covering on tbl
Index Cond: (ROW(c1, c2) <= ROW(262, 1))
Filter: (ROW(c1, c2, c3) < ROW(262, 1, 1))
(4 rows)
select * from tbl where (c1,c2,c3) < (262,1,1) limit 1;
c1 | c2 | c3 | c4
----+----+----+----
1 | 2 | |
(1 row)
DROP TABLE tbl;
RESET enable_seqscan;
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box,
UNIQUE(c1,c2) INCLUDE(c3,c4));
SELECT indexrelid::regclass, indnatts, indnkeyatts, indisunique, indisprimary, indkey, indclass FROM pg_index WHERE indrelid = 'tbl'::regclass::oid;
indexrelid | indnatts | indnkeyatts | indisunique | indisprimary | indkey | indclass
---------------------+----------+-------------+-------------+--------------+---------+-----------
tbl_c1_c2_c3_c4_key | 4 | 2 | t | f | 1 2 3 4 | 1978 1978
(1 row)
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'tbl'::regclass::oid;
pg_get_constraintdef | conname | conkey
----------------------------------+---------------------+--------
UNIQUE (c1, c2) INCLUDE (c3, c4) | tbl_c1_c2_c3_c4_key | {1,2}
(1 row)
-- ensure that constraint works
INSERT INTO tbl SELECT 1, 2, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ERROR: duplicate key value violates unique constraint "tbl_c1_c2_c3_c4_key"
DETAIL: Key (c1, c2)=(1, 2) already exists.
DROP TABLE tbl;
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box,
PRIMARY KEY(c1,c2) INCLUDE(c3,c4));
SELECT indexrelid::regclass, indnatts, indnkeyatts, indisunique, indisprimary, indkey, indclass FROM pg_index WHERE indrelid = 'tbl'::regclass::oid;
indexrelid | indnatts | indnkeyatts | indisunique | indisprimary | indkey | indclass
------------+----------+-------------+-------------+--------------+---------+-----------
tbl_pkey | 4 | 2 | t | t | 1 2 3 4 | 1978 1978
(1 row)
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'tbl'::regclass::oid;
pg_get_constraintdef | conname | conkey
---------------------------------------+----------+--------
PRIMARY KEY (c1, c2) INCLUDE (c3, c4) | tbl_pkey | {1,2}
(1 row)
-- ensure that constraint works
INSERT INTO tbl SELECT 1, 2, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ERROR: duplicate key value violates unique constraint "tbl_pkey"
DETAIL: Key (c1, c2)=(1, 2) already exists.
INSERT INTO tbl SELECT 1, NULL, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ERROR: null value in column "c2" of relation "tbl" violates not-null constraint
DETAIL: Failing row contains (1, null, 3, (4,4),(4,4)).
INSERT INTO tbl SELECT x, 2*x, NULL, NULL FROM generate_series(1,10) AS x;
DROP TABLE tbl;
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box,
EXCLUDE USING btree (c1 WITH =) INCLUDE(c3,c4));
SELECT indexrelid::regclass, indnatts, indnkeyatts, indisunique, indisprimary, indkey, indclass FROM pg_index WHERE indrelid = 'tbl'::regclass::oid;
indexrelid | indnatts | indnkeyatts | indisunique | indisprimary | indkey | indclass
-------------------+----------+-------------+-------------+--------------+--------+----------
tbl_c1_c3_c4_excl | 3 | 1 | f | f | 1 3 4 | 1978
(1 row)
SELECT pg_get_constraintdef(oid), conname, conkey FROM pg_constraint WHERE conrelid = 'tbl'::regclass::oid;
pg_get_constraintdef | conname | conkey
--------------------------------------------------+-------------------+--------
EXCLUDE USING btree (c1 WITH =) INCLUDE (c3, c4) | tbl_c1_c3_c4_excl | {1}
(1 row)
-- ensure that constraint works
INSERT INTO tbl SELECT 1, 2, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ERROR: conflicting key value violates exclusion constraint "tbl_c1_c3_c4_excl"
DETAIL: Key (c1)=(1) conflicts with existing key (c1)=(1).
INSERT INTO tbl SELECT x, 2*x, NULL, NULL FROM generate_series(1,10) AS x;
DROP TABLE tbl;
/*
* 3.0 Test ALTER TABLE DROP COLUMN.
* Any column deletion leads to index deletion.
*/
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 int);
CREATE UNIQUE INDEX tbl_idx ON tbl using btree(c1, c2, c3, c4);
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_idx ON public.tbl USING btree (c1, c2, c3, c4)
(1 row)
ALTER TABLE tbl DROP COLUMN c3;
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
----------
(0 rows)
DROP TABLE tbl;
/*
* 3.1 Test ALTER TABLE DROP COLUMN.
* Included column deletion leads to the index deletion,
* AS well AS key columns deletion. It's explained in documentation.
*/
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box);
CREATE UNIQUE INDEX tbl_idx ON tbl using btree(c1, c2) INCLUDE(c3,c4);
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
---------------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_idx ON public.tbl USING btree (c1, c2) INCLUDE (c3, c4)
(1 row)
ALTER TABLE tbl DROP COLUMN c3;
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
----------
(0 rows)
DROP TABLE tbl;
/*
* 3.2 Test ALTER TABLE DROP COLUMN.
* Included column deletion leads to the index deletion.
* AS well AS key columns deletion. It's explained in documentation.
*/
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box, UNIQUE(c1, c2) INCLUDE(c3,c4));
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
---------------------------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_c1_c2_c3_c4_key ON public.tbl USING btree (c1, c2) INCLUDE (c3, c4)
(1 row)
ALTER TABLE tbl DROP COLUMN c3;
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
----------
(0 rows)
ALTER TABLE tbl DROP COLUMN c1;
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
----------
(0 rows)
DROP TABLE tbl;
/*
* 3.3 Test ALTER TABLE SET STATISTICS
*/
CREATE TABLE tbl (c1 int, c2 int);
CREATE INDEX tbl_idx ON tbl (c1, (c1+0)) INCLUDE (c2);
ALTER INDEX tbl_idx ALTER COLUMN 1 SET STATISTICS 1000;
ERROR: cannot alter statistics on non-expression column "c1" of index "tbl_idx"
HINT: Alter statistics on table column instead.
ALTER INDEX tbl_idx ALTER COLUMN 2 SET STATISTICS 1000;
ALTER INDEX tbl_idx ALTER COLUMN 3 SET STATISTICS 1000;
ERROR: cannot alter statistics on included column "c2" of index "tbl_idx"
ALTER INDEX tbl_idx ALTER COLUMN 4 SET STATISTICS 1000;
ERROR: column number 4 of relation "tbl_idx" does not exist
DROP TABLE tbl;
/*
* 4. CREATE INDEX CONCURRENTLY
*/
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box, UNIQUE(c1, c2) INCLUDE(c3,c4));
INSERT INTO tbl SELECT x, 2*x, 3*x, box('4,4,4,4') FROM generate_series(1,1000) AS x;
CREATE UNIQUE INDEX CONCURRENTLY on tbl (c1, c2) INCLUDE (c3, c4);
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
---------------------------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_c1_c2_c3_c4_idx ON public.tbl USING btree (c1, c2) INCLUDE (c3, c4)
CREATE UNIQUE INDEX tbl_c1_c2_c3_c4_key ON public.tbl USING btree (c1, c2) INCLUDE (c3, c4)
(2 rows)
DROP TABLE tbl;
/*
* 5. REINDEX
*/
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box, UNIQUE(c1, c2) INCLUDE(c3,c4));
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
---------------------------------------------------------------------------------------------
CREATE UNIQUE INDEX tbl_c1_c2_c3_c4_key ON public.tbl USING btree (c1, c2) INCLUDE (c3, c4)
(1 row)
ALTER TABLE tbl DROP COLUMN c3;
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
----------
(0 rows)
REINDEX INDEX tbl_c1_c2_c3_c4_key;
ERROR: relation "tbl_c1_c2_c3_c4_key" does not exist
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
----------
(0 rows)
ALTER TABLE tbl DROP COLUMN c1;
SELECT indexdef FROM pg_indexes WHERE tablename = 'tbl' ORDER BY indexname;
indexdef
----------
(0 rows)
DROP TABLE tbl;
/*
* 7. Check various AMs. All but btree and gist must fail.
*/
CREATE TABLE tbl (c1 int,c2 int, c3 box, c4 box);
CREATE INDEX on tbl USING brin(c1, c2) INCLUDE (c3, c4);
ERROR: access method "brin" does not support included columns
CREATE INDEX on tbl USING gist(c3) INCLUDE (c1, c4);
CREATE INDEX on tbl USING spgist(c3) INCLUDE (c4);
ERROR: access method "spgist" does not support included columns
CREATE INDEX on tbl USING gin(c1, c2) INCLUDE (c3, c4);
ERROR: access method "gin" does not support included columns
CREATE INDEX on tbl USING hash(c1, c2) INCLUDE (c3, c4);
ERROR: access method "hash" does not support included columns
CREATE INDEX on tbl USING rtree(c3) INCLUDE (c1, c4);
NOTICE: substituting access method "gist" for obsolete method "rtree"
CREATE INDEX on tbl USING btree(c1, c2) INCLUDE (c3, c4);
DROP TABLE tbl;
/*
* 8. Update, delete values in indexed table.
*/
CREATE TABLE tbl (c1 int, c2 int, c3 int, c4 box);
INSERT INTO tbl SELECT x, 2*x, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
CREATE UNIQUE INDEX tbl_idx_unique ON tbl using btree(c1, c2) INCLUDE (c3,c4);
UPDATE tbl SET c1 = 100 WHERE c1 = 2;
UPDATE tbl SET c1 = 1 WHERE c1 = 3;
-- should fail
UPDATE tbl SET c2 = 2 WHERE c1 = 1;
ERROR: duplicate key value violates unique constraint "tbl_idx_unique"
DETAIL: Key (c1, c2)=(1, 2) already exists.
UPDATE tbl SET c3 = 1;
DELETE FROM tbl WHERE c1 = 5 OR c3 = 12;
DROP TABLE tbl;
/*
* 9. Alter column type.
*/
CREATE TABLE tbl (c1 int,c2 int, c3 int, c4 box, UNIQUE(c1, c2) INCLUDE(c3,c4));
INSERT INTO tbl SELECT x, 2*x, 3*x, box('4,4,4,4') FROM generate_series(1,10) AS x;
ALTER TABLE tbl ALTER c1 TYPE bigint;
ALTER TABLE tbl ALTER c3 TYPE bigint;
\d tbl
Table "public.tbl"
Column | Type | Collation | Nullable | Default
--------+---------+-----------+----------+---------
c1 | bigint | | |
c2 | integer | | |
c3 | bigint | | |
c4 | box | | |
Indexes:
"tbl_c1_c2_c3_c4_key" UNIQUE CONSTRAINT, btree (c1, c2) INCLUDE (c3, c4)
DROP TABLE tbl;
|
