forked from huawei/openGauss-server
953 lines
32 KiB
Plaintext
953 lines
32 KiB
Plaintext
----------------------------------------------------------
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---------------generated column test
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----------------------------------------------------------
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CREATE TABLE gtest0 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (55) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest0_pkey" for table "gtest0"
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CREATE TABLE gtest1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest1_pkey" for table "gtest1"
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SELECT table_name, column_name, column_default, is_nullable, is_generated, generation_expression FROM information_schema.columns WHERE table_name LIKE 'gtest_' ORDER BY 1, 2;
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table_name | column_name | column_default | is_nullable | is_generated | generation_expression
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------------+-------------+----------------+-------------+--------------+-----------------------
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gtest0 | a | | NO | NEVER |
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gtest0 | b | | YES | ALWAYS | 55
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gtest1 | a | | NO | NEVER |
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gtest1 | b | | YES | ALWAYS | (a * 2)
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(4 rows)
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\d gtest1
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Table "public.gtest1"
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Column | Type | Modifiers
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--------+---------+--------------------------------------
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a | integer | not null
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b | integer | generated always as ((a * 2)) stored
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Indexes:
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"gtest1_pkey" PRIMARY KEY, btree (a) TABLESPACE pg_default
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-- duplicate generated
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CREATE TABLE gtest_err_1 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED GENERATED ALWAYS AS (a * 3) STORED);
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ERROR: multiple generation clauses specified for column "b" of table "gtest_err_1"
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LINE 1: ...ARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED GENERATED ...
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^
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-- references to other generated columns, including self-references
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CREATE TABLE gtest_err_2a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (b * 2) STORED);
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ERROR: cannot use generated column "b" in column generation expression
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DETAIL: A generated column cannot reference another generated column.
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CREATE TABLE gtest_err_2b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED, c int GENERATED ALWAYS AS (b * 3) STORED);
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ERROR: cannot use generated column "b" in column generation expression
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DETAIL: A generated column cannot reference another generated column.
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-- invalid reference
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CREATE TABLE gtest_err_3 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (c * 2) STORED);
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ERROR: column "c" does not exist
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-- generation expression must be immutable
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CREATE TABLE gtest_err_4 (a int PRIMARY KEY, b double precision GENERATED ALWAYS AS (random()) STORED);
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ERROR: generation expression is not immutable
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-- cannot have default/identity and generated
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CREATE TABLE gtest_err_5a (a int PRIMARY KEY, b int DEFAULT 5 GENERATED ALWAYS AS (a * 2) STORED);
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ERROR: both default and generation expression specified for column "b" of table "gtest_err_5a"
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LINE 1: ... gtest_err_5a (a int PRIMARY KEY, b int DEFAULT 5 GENERATED ...
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^
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CREATE TABLE gtest_err_5b (a int PRIMARY KEY, b int GENERATED ALWAYS AS identity GENERATED ALWAYS AS (a * 2) STORED);
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ERROR: syntax error at or near "identity"
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LINE 1: ..._5b (a int PRIMARY KEY, b int GENERATED ALWAYS AS identity G...
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^
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-- reference to system column not allowed in generated column
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CREATE TABLE gtest_err_6a (a int PRIMARY KEY, b bool GENERATED ALWAYS AS (xmin <> 37) STORED);
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ERROR: cannot use system column "xmin" in column generation expression
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-- various prohibited constructs
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CREATE TABLE gtest_err_7a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (avg(a)) STORED);
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ERROR: cannot use aggregate function in generated column expression
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CREATE TABLE gtest_err_7b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (row_number() OVER (ORDER BY a)) STORED);
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ERROR: cannot use window function in generated column expression
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CREATE TABLE gtest_err_7c (a int PRIMARY KEY, b int GENERATED ALWAYS AS ((SELECT a)) STORED);
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ERROR: cannot use subquery in generated column expression
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CREATE TABLE gtest_err_7d (a int PRIMARY KEY, b int GENERATED ALWAYS AS (generate_series(1, a)) STORED);
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ERROR: generated column expression must not return a set
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INSERT INTO gtest1 VALUES (1);
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INSERT INTO gtest1 VALUES (2, DEFAULT);
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INSERT INTO gtest1 VALUES (21, DEFAULT), (22, DEFAULT), (23, DEFAULT), (24, DEFAULT);
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DELETE FROM gtest1 WHERE a >20;
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INSERT INTO gtest1 VALUES (3, 33); -- error
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ERROR: cannot insert into column "b"
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DETAIL: Column "b" is a generated column.
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SELECT * FROM gtest1 ORDER BY a;
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a | b
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---+---
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1 | 2
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2 | 4
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(2 rows)
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UPDATE gtest1 SET b = DEFAULT WHERE a = 1;
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UPDATE gtest1 SET b = 11 WHERE a = 1; -- error
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ERROR: column "b" can only be updated to DEFAULT
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DETAIL: Column "b" is a generated column.
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SELECT * FROM gtest1 ORDER BY a;
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a | b
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---+---
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1 | 2
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2 | 4
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(2 rows)
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SELECT a, b, b * 2 AS b2 FROM gtest1 ORDER BY a;
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a | b | b2
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---+---+----
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1 | 2 | 4
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2 | 4 | 8
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(2 rows)
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SELECT a, b FROM gtest1 WHERE b = 4 ORDER BY a;
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a | b
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---+---
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2 | 4
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(1 row)
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-- test that overflow error happens on write
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INSERT INTO gtest1 VALUES (2000000000);
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ERROR: integer out of range
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SELECT * FROM gtest1;
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a | b
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---+---
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2 | 4
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1 | 2
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(2 rows)
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DELETE FROM gtest1 WHERE a = 2000000000;
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-- test with joins
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CREATE TABLE gtestx (x int, y int);
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INSERT INTO gtestx VALUES (11, 1), (22, 2), (33, 3);
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SELECT * FROM gtestx, gtest1 WHERE gtestx.y = gtest1.a;
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x | y | a | b
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----+---+---+---
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11 | 1 | 1 | 2
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22 | 2 | 2 | 4
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(2 rows)
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DROP TABLE gtestx;
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-- test UPDATE/DELETE quals
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SELECT * FROM gtest1 ORDER BY a;
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a | b
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---+---
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1 | 2
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2 | 4
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(2 rows)
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UPDATE gtest1 SET a = 3 WHERE b = 4;
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SELECT * FROM gtest1 ORDER BY a;
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a | b
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---+---
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1 | 2
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3 | 6
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(2 rows)
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DELETE FROM gtest1 WHERE b = 2;
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SELECT * FROM gtest1 ORDER BY a;
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a | b
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---+---
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3 | 6
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(1 row)
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-- views
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CREATE VIEW gtest1v AS SELECT * FROM gtest1;
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SELECT * FROM gtest1v;
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a | b
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---+---
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3 | 6
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(1 row)
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INSERT INTO gtest1v VALUES (4, 8); -- fails
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ERROR: cannot insert into view "gtest1v"
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HINT: You need an unconditional ON INSERT DO INSTEAD rule or an INSTEAD OF INSERT trigger.
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DROP VIEW gtest1v;
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-- CTEs
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WITH foo AS (SELECT * FROM gtest1) SELECT * FROM foo;
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a | b
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---+---
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3 | 6
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(1 row)
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-- test stored update
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CREATE TABLE gtest3 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 3) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest3_pkey" for table "gtest3"
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INSERT INTO gtest3 (a) VALUES (1), (2), (3);
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SELECT * FROM gtest3 ORDER BY a;
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a | b
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---+---
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1 | 3
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2 | 6
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3 | 9
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(3 rows)
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UPDATE gtest3 SET a = 22 WHERE a = 2;
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SELECT * FROM gtest3 ORDER BY a;
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a | b
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----+----
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1 | 3
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3 | 9
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22 | 66
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(3 rows)
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-- COPY
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TRUNCATE gtest1;
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INSERT INTO gtest1 (a) VALUES (1), (2);
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COPY gtest1 TO stdout;
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1
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2
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COPY gtest1 (a, b) TO stdout;
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ERROR: column "b" is a generated column
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DETAIL: Generated columns cannot be used in COPY.
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COPY gtest1 FROM stdin;
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COPY gtest1 (a, b) FROM stdin;
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ERROR: column "b" is a generated column
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DETAIL: Generated columns cannot be used in COPY.
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SELECT * FROM gtest1 ORDER BY a;
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a | b
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---+---
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1 | 2
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2 | 4
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3 | 6
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4 | 8
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(4 rows)
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TRUNCATE gtest3;
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INSERT INTO gtest3 (a) VALUES (1), (2);
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COPY gtest3 TO stdout;
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1
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2
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COPY gtest3 (a, b) TO stdout;
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ERROR: column "b" is a generated column
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DETAIL: Generated columns cannot be used in COPY.
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COPY gtest3 FROM stdin;
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COPY gtest3 (a, b) FROM stdin;
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ERROR: column "b" is a generated column
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DETAIL: Generated columns cannot be used in COPY.
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SELECT * FROM gtest3 ORDER BY a;
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a | b
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---+----
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1 | 3
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2 | 6
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3 | 9
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4 | 12
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(4 rows)
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-- null values
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CREATE TABLE gtest2 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (NULL) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest2_pkey" for table "gtest2"
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INSERT INTO gtest2 VALUES (1);
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SELECT * FROM gtest2;
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a | b
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---+---
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1 |
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(1 row)
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-- composite types
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CREATE TYPE double_int as (a int, b int);
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CREATE TABLE gtest4 (
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a int,
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b double_int GENERATED ALWAYS AS ((a * 2, a * 3)) STORED
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);
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INSERT INTO gtest4 VALUES (1), (6);
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SELECT * FROM gtest4;
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a | b
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---+---------
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1 | (2,3)
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6 | (12,18)
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(2 rows)
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DROP TABLE gtest4;
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DROP TYPE double_int;
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-- using tableoid is allowed
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CREATE TABLE gtest_tableoid (
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a int PRIMARY KEY,
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b bool GENERATED ALWAYS AS (tableoid <> 0) STORED
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);
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ERROR: cannot use system column "tableoid" in column generation expression
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-- drop column behavior
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CREATE TABLE gtest10 (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (b * 2) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest10_pkey" for table "gtest10"
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ALTER TABLE gtest10 DROP COLUMN b;
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\d gtest10
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Table "public.gtest10"
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Column | Type | Modifiers
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--------+---------+-----------
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a | integer | not null
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Indexes:
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"gtest10_pkey" PRIMARY KEY, btree (a) TABLESPACE pg_default
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CREATE TABLE gtest10a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest10a_pkey" for table "gtest10a"
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ALTER TABLE gtest10a DROP COLUMN b;
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INSERT INTO gtest10a (a) VALUES (1);
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DROP TABLE gtest10a;
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-- privileges
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CREATE USER regress_user11 with password 'Gauss_123';
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CREATE TABLE gtest11s (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (b * 2) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest11s_pkey" for table "gtest11s"
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INSERT INTO gtest11s VALUES (1, 10), (2, 20);
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GRANT SELECT (a, c) ON gtest11s TO regress_user11;
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CREATE FUNCTION gf1(a int) RETURNS int AS $$ SELECT a * 3 $$ IMMUTABLE LANGUAGE SQL;
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REVOKE ALL ON FUNCTION gf1(int) FROM PUBLIC;
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CREATE TABLE gtest12s (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (gf1(b)) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest12s_pkey" for table "gtest12s"
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INSERT INTO gtest12s VALUES (1, 10), (2, 20);
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GRANT SELECT (a, c) ON gtest12s TO regress_user11;
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SET ROLE regress_user11 PASSWORD 'Gauss_123';
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SELECT a, b FROM gtest11s; -- not allowed
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ERROR: permission denied for relation gtest11s
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DETAIL: N/A
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SELECT a, c FROM gtest11s; -- allowed
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a | c
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---+----
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1 | 20
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2 | 40
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(2 rows)
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SELECT gf1(10); -- not allowed
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ERROR: permission denied for function gf1
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DETAIL: N/A
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CONTEXT: referenced column: gf1
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SELECT a, c FROM gtest12s; -- allowed
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a | c
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---+----
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1 | 30
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2 | 60
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(2 rows)
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RESET ROLE;
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DROP TABLE gtest11s, gtest12s;
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DROP FUNCTION gf1(int);
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DROP USER regress_user11;
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-- check constraints
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CREATE TABLE gtest20 (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED CHECK (b < 50));
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest20_pkey" for table "gtest20"
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INSERT INTO gtest20 (a) VALUES (10); -- ok
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INSERT INTO gtest20 (a) VALUES (30); -- violates constraint
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ERROR: new row for relation "gtest20" violates check constraint "gtest20_b_check"
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DETAIL: N/A
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CREATE TABLE gtest20a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest20a_pkey" for table "gtest20a"
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INSERT INTO gtest20a (a) VALUES (10);
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INSERT INTO gtest20a (a) VALUES (30);
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ALTER TABLE gtest20a ADD CHECK (b < 50); -- fails on existing row
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ERROR: check constraint "gtest20a_b_check" is violated by some row
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CREATE TABLE gtest20b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest20b_pkey" for table "gtest20b"
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INSERT INTO gtest20b (a) VALUES (10);
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INSERT INTO gtest20b (a) VALUES (30);
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ALTER TABLE gtest20b ADD CONSTRAINT chk CHECK (b < 50) NOT VALID;
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ALTER TABLE gtest20b VALIDATE CONSTRAINT chk; -- fails on existing row
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ERROR: check constraint "chk" is violated by some row
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DROP TABLE gtest20a,gtest20b;
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DROP TABLE gtest20;
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-- not-null constraints
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CREATE TABLE gtest21a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (nullif(a, 0)) STORED NOT NULL);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest21a_pkey" for table "gtest21a"
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INSERT INTO gtest21a (a) VALUES (1); -- ok
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INSERT INTO gtest21a (a) VALUES (0); -- violates constraint
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ERROR: null value in column "b" violates not-null constraint
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DETAIL: Failing row contains (0, null).
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CREATE TABLE gtest21b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (nullif(a, 0)) STORED);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest21b_pkey" for table "gtest21b"
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ALTER TABLE gtest21b ALTER COLUMN b SET NOT NULL;
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INSERT INTO gtest21b (a) VALUES (1); -- ok
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INSERT INTO gtest21b (a) VALUES (0); -- violates constraint
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ERROR: null value in column "b" violates not-null constraint
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DETAIL: Failing row contains (0, null).
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ALTER TABLE gtest21b ALTER COLUMN b DROP NOT NULL;
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INSERT INTO gtest21b (a) VALUES (0); -- ok now
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DROP TABLE gtest21a,gtest21b;
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-- index constraints
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CREATE TABLE gtest22a (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a / 2) STORED UNIQUE);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest22a_pkey" for table "gtest22a"
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NOTICE: CREATE TABLE / UNIQUE will create implicit index "gtest22a_b_key" for table "gtest22a"
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INSERT INTO gtest22a VALUES (2);
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INSERT INTO gtest22a VALUES (3);
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INSERT INTO gtest22a VALUES (4);
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ERROR: duplicate key value violates unique constraint "gtest22a_b_key"
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DETAIL: Key (b)=(2) already exists.
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CREATE TABLE gtest22b (a int, b int GENERATED ALWAYS AS (a / 2) STORED, PRIMARY KEY (a, b));
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest22b_pkey" for table "gtest22b"
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INSERT INTO gtest22b VALUES (2);
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INSERT INTO gtest22b VALUES (2);
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ERROR: duplicate key value violates unique constraint "gtest22b_pkey"
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DETAIL: Key (a, b)=(2, 1) already exists.
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DROP TABLE gtest22b,gtest22a;
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-- indexes
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CREATE TABLE gtest22c (a int, b int GENERATED ALWAYS AS (a * 2) STORED);
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CREATE INDEX gtest22c_b_idx ON gtest22c (b);
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CREATE INDEX gtest22c_expr_idx ON gtest22c ((b * 3));
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CREATE INDEX gtest22c_pred_idx ON gtest22c (a) WHERE b > 0;
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\d gtest22c
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Table "public.gtest22c"
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Column | Type | Modifiers
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--------+---------+--------------------------------------
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a | integer |
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b | integer | generated always as ((a * 2)) stored
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Indexes:
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"gtest22c_b_idx" btree (b) TABLESPACE pg_default
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"gtest22c_expr_idx" btree ((b * 3)) TABLESPACE pg_default
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"gtest22c_pred_idx" btree (a) TABLESPACE pg_default WHERE b > 0
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INSERT INTO gtest22c VALUES (1), (2), (3);
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SET enable_seqscan TO off;
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SET enable_bitmapscan TO off;
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EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE b = 4;
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QUERY PLAN
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---------------------------------------------
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[Bypass]
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Index Scan using gtest22c_b_idx on gtest22c
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Index Cond: (b = 4)
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(3 rows)
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SELECT * FROM gtest22c WHERE b = 4;
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a | b
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---+---
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2 | 4
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(1 row)
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EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE b * 3 = 6;
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QUERY PLAN
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------------------------------------------------
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[Bypass]
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Index Scan using gtest22c_expr_idx on gtest22c
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Index Cond: ((b * 3) = 6)
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(3 rows)
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SELECT * FROM gtest22c WHERE b * 3 = 6;
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a | b
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---+---
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1 | 2
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(1 row)
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EXPLAIN (COSTS OFF) SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
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QUERY PLAN
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------------------------------------------------
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[Bypass]
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Index Scan using gtest22c_pred_idx on gtest22c
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Index Cond: (a = 1)
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(3 rows)
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SELECT * FROM gtest22c WHERE a = 1 AND b > 0;
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a | b
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---+---
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1 | 2
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(1 row)
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RESET enable_seqscan;
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RESET enable_bitmapscan;
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DROP TABLE gtest22c;
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-- foreign keys
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CREATE TABLE gtest23a (x int PRIMARY KEY, y int);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest23a_pkey" for table "gtest23a"
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INSERT INTO gtest23a VALUES (1, 11), (2, 22), (3, 33);
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CREATE TABLE gtest23x (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x) ON UPDATE CASCADE); -- error
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest23x_pkey" for table "gtest23x"
|
|
ERROR: invalid ON UPDATE action for foreign key constraint containing generated column
|
|
CREATE TABLE gtest23x (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x) ON DELETE SET NULL); -- error
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest23x_pkey" for table "gtest23x"
|
|
ERROR: invalid ON DELETE action for foreign key constraint containing generated column
|
|
CREATE TABLE gtest23b (a int PRIMARY KEY, b int GENERATED ALWAYS AS (a * 2) STORED REFERENCES gtest23a (x));
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest23b_pkey" for table "gtest23b"
|
|
\d gtest23b
|
|
Table "public.gtest23b"
|
|
Column | Type | Modifiers
|
|
--------+---------+--------------------------------------
|
|
a | integer | not null
|
|
b | integer | generated always as ((a * 2)) stored
|
|
Indexes:
|
|
"gtest23b_pkey" PRIMARY KEY, btree (a) TABLESPACE pg_default
|
|
Foreign-key constraints:
|
|
"gtest23b_b_fkey" FOREIGN KEY (b) REFERENCES gtest23a(x)
|
|
|
|
INSERT INTO gtest23b VALUES (1); -- ok
|
|
INSERT INTO gtest23b VALUES (5); -- error
|
|
ERROR: insert or update on table "gtest23b" violates foreign key constraint "gtest23b_b_fkey"
|
|
DETAIL: Key (b)=(10) is not present in table "gtest23a".
|
|
DROP TABLE gtest23b;
|
|
DROP TABLE gtest23a;
|
|
CREATE TABLE gtest23p (x int, y int GENERATED ALWAYS AS (x * 2) STORED, PRIMARY KEY (y));
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest23p_pkey" for table "gtest23p"
|
|
INSERT INTO gtest23p VALUES (1), (2), (3);
|
|
CREATE TABLE gtest23q (a int PRIMARY KEY, b int REFERENCES gtest23p (y));
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest23q_pkey" for table "gtest23q"
|
|
INSERT INTO gtest23q VALUES (1, 2); -- ok
|
|
INSERT INTO gtest23q VALUES (2, 5); -- error
|
|
ERROR: insert or update on table "gtest23q" violates foreign key constraint "gtest23q_b_fkey"
|
|
DETAIL: Key (b)=(5) is not present in table "gtest23p".
|
|
DROP TABLE gtest23q;
|
|
-- domains
|
|
CREATE DOMAIN gtestdomain1 AS int CHECK (VALUE < 10);
|
|
CREATE TABLE gtest24 (a int PRIMARY KEY, b gtestdomain1 GENERATED ALWAYS AS (a * 2) STORED);
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest24_pkey" for table "gtest24"
|
|
INSERT INTO gtest24 (a) VALUES (4); -- ok
|
|
INSERT INTO gtest24 (a) VALUES (6); -- error
|
|
ERROR: value for domain gtestdomain1 violates check constraint "gtestdomain1_check"
|
|
DROP TABLE gtest24;
|
|
DROP DOMAIN gtestdomain1;
|
|
-- typed tables (currently not supported)
|
|
CREATE TYPE gtest_type AS (f1 integer, f2 text, f3 bigint);
|
|
CREATE TABLE gtest28 OF gtest_type (f1 WITH OPTIONS GENERATED ALWAYS AS (f2 *2) STORED);
|
|
ERROR: generated columns are not supported on typed tables
|
|
DROP TYPE gtest_type CASCADE;
|
|
-- partitioned table
|
|
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 text, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE (f1) ( PARTITION p1 VALUES LESS THAN ('2016-07-16'));
|
|
INSERT INTO gtest_parent (f1, f2) VALUES ('2016-07-15', 1);
|
|
SELECT * FROM gtest_parent;
|
|
f1 | f2 | f3
|
|
--------------------------+----+----
|
|
Fri Jul 15 00:00:00 2016 | 1 | 2
|
|
(1 row)
|
|
|
|
DROP TABLE gtest_parent;
|
|
-- generated columns in partition key (not allowed)
|
|
CREATE TABLE gtest_parent (f1 date NOT NULL, f2 bigint, f3 bigint GENERATED ALWAYS AS (f2 * 2) STORED) PARTITION BY RANGE (f3) ( PARTITION p1 VALUES LESS THAN ('2016-07-16'));
|
|
ERROR: cannot use generated column in partition key
|
|
DETAIL: Column "f3" is a generated column.
|
|
-- ALTER TABLE ... ADD COLUMN
|
|
CREATE TABLE gtest25 (a int PRIMARY KEY);
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest25_pkey" for table "gtest25"
|
|
INSERT INTO gtest25 VALUES (3), (4);
|
|
ALTER TABLE gtest25 ADD COLUMN b int GENERATED ALWAYS AS (a * 3) STORED;
|
|
SELECT * FROM gtest25 ORDER BY a;
|
|
a | b
|
|
---+----
|
|
3 | 9
|
|
4 | 12
|
|
(2 rows)
|
|
|
|
ALTER TABLE gtest25 ADD COLUMN x int GENERATED ALWAYS AS (b * 4) STORED; -- error
|
|
ERROR: cannot use generated column "b" in column generation expression
|
|
DETAIL: A generated column cannot reference another generated column.
|
|
ALTER TABLE gtest25 ADD COLUMN x int GENERATED ALWAYS AS (z * 4) STORED; -- error
|
|
ERROR: column "z" does not exist
|
|
DROP TABLE gtest25;
|
|
-- ALTER TABLE ... ALTER COLUMN
|
|
CREATE TABLE gtest27 (
|
|
a int,
|
|
b int GENERATED ALWAYS AS (a * 2) STORED
|
|
);
|
|
INSERT INTO gtest27 (a) VALUES (3), (4);
|
|
ALTER TABLE gtest27 ALTER COLUMN a TYPE text; -- error
|
|
ERROR: cannot alter type of a column used by a generated column
|
|
DETAIL: Column "a" is used by generated column "b".
|
|
ALTER TABLE gtest27 ALTER COLUMN b TYPE numeric;
|
|
\d gtest27
|
|
Table "public.gtest27"
|
|
Column | Type | Modifiers
|
|
--------+---------+--------------------------------------
|
|
a | integer |
|
|
b | numeric | generated always as ((a * 2)) stored
|
|
|
|
SELECT * FROM gtest27;
|
|
a | b
|
|
---+---
|
|
3 | 6
|
|
4 | 8
|
|
(2 rows)
|
|
|
|
ALTER TABLE gtest27 ALTER COLUMN b TYPE boolean USING b <> 0;
|
|
ALTER TABLE gtest27 ALTER COLUMN b DROP DEFAULT; -- error
|
|
ERROR: column "b" of relation "gtest27" is a generated column
|
|
\d gtest27
|
|
Table "public.gtest27"
|
|
Column | Type | Modifiers
|
|
--------+---------+--------------------------------------
|
|
a | integer |
|
|
b | boolean | generated always as ((a * 2)) stored
|
|
|
|
DROP TABLE gtest27;
|
|
-- triggers
|
|
CREATE TABLE gtest26 (
|
|
a int PRIMARY KEY,
|
|
b int GENERATED ALWAYS AS (a * 2) STORED
|
|
);
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "gtest26_pkey" for table "gtest26"
|
|
CREATE FUNCTION gtest_trigger_func() RETURNS trigger
|
|
LANGUAGE plpgsql
|
|
AS $$
|
|
BEGIN
|
|
IF tg_op IN ('DELETE', 'UPDATE') THEN
|
|
RAISE INFO '%: %: old = %', TG_NAME, TG_WHEN, OLD;
|
|
END IF;
|
|
IF tg_op IN ('INSERT', 'UPDATE') THEN
|
|
RAISE INFO '%: %: new = %', TG_NAME, TG_WHEN, NEW;
|
|
END IF;
|
|
IF tg_op = 'DELETE' THEN
|
|
RETURN OLD;
|
|
ELSE
|
|
RETURN NEW;
|
|
END IF;
|
|
END
|
|
$$;
|
|
CREATE TRIGGER gtest1 BEFORE DELETE OR UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
WHEN (OLD.b < 0) -- ok
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
CREATE TRIGGER gtest2a BEFORE INSERT OR UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
WHEN (NEW.b < 0) -- error
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
ERROR: BEFORE trigger's WHEN condition cannot reference NEW generated columns
|
|
LINE 3: WHEN (NEW.b < 0)
|
|
^
|
|
DETAIL: Column "b" is a generated column.
|
|
CREATE TRIGGER gtest2b BEFORE INSERT OR UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
WHEN (NEW.* IS NOT NULL) -- error
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
ERROR: BEFORE trigger's WHEN condition cannot reference NEW generated columns
|
|
LINE 3: WHEN (NEW.* IS NOT NULL)
|
|
^
|
|
DETAIL: A whole-row reference is used and the table contains generated columns.
|
|
CREATE TRIGGER gtest2 BEFORE INSERT ON gtest26
|
|
FOR EACH ROW
|
|
WHEN (NEW.a < 0)
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
CREATE TRIGGER gtest3 AFTER DELETE OR UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
WHEN (OLD.b < 0) -- ok
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
CREATE TRIGGER gtest4 AFTER INSERT OR UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
WHEN (NEW.b < 0) -- ok
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
INSERT INTO gtest26 (a) VALUES (-2), (0), (3);
|
|
INFO: gtest2: BEFORE: new = (-2,)
|
|
INFO: gtest4: AFTER: new = (-2,-4)
|
|
SELECT * FROM gtest26 ORDER BY a;
|
|
a | b
|
|
----+----
|
|
-2 | -4
|
|
0 | 0
|
|
3 | 6
|
|
(3 rows)
|
|
|
|
UPDATE gtest26 SET a = a * -2;
|
|
INFO: gtest1: BEFORE: old = (-2,-4)
|
|
INFO: gtest1: BEFORE: new = (4,)
|
|
INFO: gtest3: AFTER: old = (-2,-4)
|
|
INFO: gtest3: AFTER: new = (4,8)
|
|
INFO: gtest4: AFTER: old = (3,6)
|
|
INFO: gtest4: AFTER: new = (-6,-12)
|
|
SELECT * FROM gtest26 ORDER BY a;
|
|
a | b
|
|
----+-----
|
|
-6 | -12
|
|
0 | 0
|
|
4 | 8
|
|
(3 rows)
|
|
|
|
DELETE FROM gtest26 WHERE a = -6;
|
|
INFO: gtest1: BEFORE: old = (-6,-12)
|
|
INFO: gtest3: AFTER: old = (-6,-12)
|
|
SELECT * FROM gtest26 ORDER BY a;
|
|
a | b
|
|
---+---
|
|
0 | 0
|
|
4 | 8
|
|
(2 rows)
|
|
|
|
DROP TRIGGER gtest1 ON gtest26;
|
|
DROP TRIGGER gtest2 ON gtest26;
|
|
DROP TRIGGER gtest3 ON gtest26;
|
|
-- Check that an UPDATE of "a" fires the trigger for UPDATE OF b, per
|
|
-- SQL standard.
|
|
CREATE FUNCTION gtest_trigger_func3() RETURNS trigger
|
|
LANGUAGE plpgsql
|
|
AS $$
|
|
BEGIN
|
|
RAISE NOTICE 'OK';
|
|
RETURN NEW;
|
|
END
|
|
$$;
|
|
CREATE TRIGGER gtest11 BEFORE UPDATE OF b ON gtest26
|
|
FOR EACH ROW
|
|
EXECUTE PROCEDURE gtest_trigger_func3();
|
|
UPDATE gtest26 SET a = 1 WHERE a = 0;
|
|
NOTICE: OK
|
|
DROP TRIGGER gtest11 ON gtest26;
|
|
TRUNCATE gtest26;
|
|
-- check that modifications of stored generated columns in triggers do
|
|
-- not get propagated
|
|
CREATE FUNCTION gtest_trigger_func4() RETURNS trigger
|
|
LANGUAGE plpgsql
|
|
AS $$
|
|
BEGIN
|
|
NEW.a = 10;
|
|
NEW.b = 300;
|
|
RETURN NEW;
|
|
END;
|
|
$$;
|
|
CREATE TRIGGER gtest12_01 BEFORE UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
CREATE TRIGGER gtest12_02 BEFORE UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
EXECUTE PROCEDURE gtest_trigger_func4();
|
|
CREATE TRIGGER gtest12_03 BEFORE UPDATE ON gtest26
|
|
FOR EACH ROW
|
|
EXECUTE PROCEDURE gtest_trigger_func();
|
|
INSERT INTO gtest26 (a) VALUES (1);
|
|
UPDATE gtest26 SET a = 11 WHERE a = 1;
|
|
INFO: gtest12_01: BEFORE: old = (1,2)
|
|
INFO: gtest12_01: BEFORE: new = (11,)
|
|
INFO: gtest12_03: BEFORE: old = (1,2)
|
|
INFO: gtest12_03: BEFORE: new = (10,)
|
|
SELECT * FROM gtest26 ORDER BY a;
|
|
a | b
|
|
----+----
|
|
10 | 20
|
|
(1 row)
|
|
|
|
DROP TABLE gtest26;
|
|
DROP FUNCTION gtest_trigger_func4;
|
|
DROP FUNCTION gtest_trigger_func3;
|
|
DROP FUNCTION gtest_trigger_func;
|
|
-- LIKE INCLUDING GENERATED and dropped column handling
|
|
CREATE TABLE gtest28a (
|
|
a int,
|
|
b int,
|
|
c int,
|
|
x int GENERATED ALWAYS AS (b * 2) STORED
|
|
);
|
|
ALTER TABLE gtest28a DROP COLUMN a;
|
|
CREATE TABLE gtest28b (LIKE gtest28a INCLUDING GENERATED);
|
|
\d gtest28*
|
|
Table "public.gtest28a"
|
|
Column | Type | Modifiers
|
|
--------+---------+--------------------------------------
|
|
b | integer |
|
|
c | integer |
|
|
x | integer | generated always as ((b * 2)) stored
|
|
|
|
Table "public.gtest28b"
|
|
Column | Type | Modifiers
|
|
--------+---------+--------------------------------------
|
|
b | integer |
|
|
c | integer |
|
|
x | integer | generated always as ((b * 2)) stored
|
|
|
|
DROP TABLE gtest28a;
|
|
DROP TABLE gtest28b;
|
|
CREATE TABLE test_like_gen_1 (a int, b int GENERATED ALWAYS AS (a * 2) STORED);
|
|
\d test_like_gen_1
|
|
Table "public.test_like_gen_1"
|
|
Column | Type | Modifiers
|
|
--------+---------+--------------------------------------
|
|
a | integer |
|
|
b | integer | generated always as ((a * 2)) stored
|
|
|
|
INSERT INTO test_like_gen_1 (a) VALUES (1);
|
|
SELECT * FROM test_like_gen_1;
|
|
a | b
|
|
---+---
|
|
1 | 2
|
|
(1 row)
|
|
|
|
CREATE TABLE test_like_gen_2 (LIKE test_like_gen_1);
|
|
\d test_like_gen_2
|
|
Table "public.test_like_gen_2"
|
|
Column | Type | Modifiers
|
|
--------+---------+-----------
|
|
a | integer |
|
|
b | integer |
|
|
|
|
INSERT INTO test_like_gen_2 (a) VALUES (1);
|
|
SELECT * FROM test_like_gen_2;
|
|
a | b
|
|
---+---
|
|
1 |
|
|
(1 row)
|
|
|
|
CREATE TABLE test_like_gen_3 (LIKE test_like_gen_1 INCLUDING GENERATED);
|
|
\d test_like_gen_3
|
|
Table "public.test_like_gen_3"
|
|
Column | Type | Modifiers
|
|
--------+---------+--------------------------------------
|
|
a | integer |
|
|
b | integer | generated always as ((a * 2)) stored
|
|
|
|
INSERT INTO test_like_gen_3 (a) VALUES (1);
|
|
SELECT * FROM test_like_gen_3;
|
|
a | b
|
|
---+---
|
|
1 | 2
|
|
(1 row)
|
|
|
|
DROP TABLE test_like_gen_1, test_like_gen_2, test_like_gen_3;
|
|
-- function
|
|
CREATE TABLE t1(height_cm int,height_in int GENERATED ALWAYS AS (height_cm * 2) STORED);
|
|
CREATE OR REPLACE FUNCTION gen_test(a integer) RETURNS int as $$
|
|
declare
|
|
b int;
|
|
begin
|
|
DELETE t1 where height_cm = a;
|
|
INSERT INTO t1 values(a);
|
|
SELECT height_in INTO b FROM t1 where height_cm = a;
|
|
return b;
|
|
end;
|
|
$$ language plpgsql;
|
|
select gen_test(100);
|
|
gen_test
|
|
----------
|
|
200
|
|
(1 row)
|
|
|
|
drop function gen_test;
|
|
DROP TABLE t1;
|
|
-- sequence test
|
|
CREATE SEQUENCE seq1 START WITH 33;
|
|
-- error
|
|
CREATE TABLE t1 (id serial,id1 integer GENERATED ALWAYS AS (nextval('seq1')) STORED);
|
|
NOTICE: CREATE TABLE will create implicit sequence "t1_id_seq" for serial column "t1.id"
|
|
ERROR: generation expression is not immutable
|
|
DROP SEQUENCE seq1;
|
|
--merage test
|
|
CREATE TABLE products_base
|
|
(
|
|
product_id INTEGER DEFAULT 0,
|
|
product_name VARCHAR(60) DEFAULT 'null',
|
|
category VARCHAR(60) DEFAULT 'unknown',
|
|
total INTEGER DEFAULT '0'
|
|
);
|
|
INSERT INTO products_base VALUES (1501, 'vivitar 35mm', 'electrncs', 100);
|
|
INSERT INTO products_base VALUES (1502, 'olympus is50', 'electrncs', 100);
|
|
INSERT INTO products_base VALUES (1600, 'play gym', 'toys', 100);
|
|
INSERT INTO products_base VALUES (1601, 'lamaze', 'toys', 100);
|
|
INSERT INTO products_base VALUES (1666, 'harry potter', 'dvd', 100);
|
|
CREATE TABLE newproducts_base
|
|
(
|
|
product_id INTEGER DEFAULT 0,
|
|
product_name VARCHAR(60) DEFAULT 'null',
|
|
category VARCHAR(60) DEFAULT 'unknown',
|
|
total INTEGER DEFAULT '0'
|
|
);
|
|
INSERT INTO newproducts_base VALUES (1502, 'olympus camera', 'electrncs', 200);
|
|
INSERT INTO newproducts_base VALUES (1601, 'lamaze', 'toys', 200);
|
|
INSERT INTO newproducts_base VALUES (1666, 'harry potter', 'toys', 200);
|
|
INSERT INTO newproducts_base VALUES (1700, 'wait interface', 'books', 200);
|
|
CREATE TABLE products_row
|
|
(
|
|
product_id INTEGER DEFAULT 0,
|
|
product_name VARCHAR(60) DEFAULT 'null',
|
|
category VARCHAR(60) DEFAULT 'unknown',
|
|
total INTEGER DEFAULT '0',
|
|
height_in int GENERATED ALWAYS AS (total * 2) STORED
|
|
);
|
|
INSERT INTO products_row SELECT * FROM products_base;
|
|
CREATE TABLE newproducts_row
|
|
(
|
|
product_id INTEGER DEFAULT 0,
|
|
product_name VARCHAR(60) DEFAULT 'null',
|
|
category VARCHAR(60) DEFAULT 'unknown',
|
|
total INTEGER DEFAULT '0',
|
|
height_in int GENERATED ALWAYS AS (total * 3) STORED
|
|
);
|
|
INSERT INTO newproducts_row SELECT * FROM newproducts_base;
|
|
MERGE INTO products_row p
|
|
USING newproducts_row np
|
|
ON p.product_id = np.product_id
|
|
WHEN MATCHED THEN
|
|
UPDATE SET product_name = np.product_name, category = np.category, total = np.total
|
|
WHEN NOT MATCHED THEN
|
|
INSERT VALUES (np.product_id, np.product_name, np.category, np.total);
|
|
SELECT * FROM products_row;
|
|
product_id | product_name | category | total | height_in
|
|
------------+----------------+-----------+-------+-----------
|
|
1501 | vivitar 35mm | electrncs | 100 | 200
|
|
1600 | play gym | toys | 100 | 200
|
|
1502 | olympus camera | electrncs | 200 | 400
|
|
1601 | lamaze | toys | 200 | 400
|
|
1666 | harry potter | toys | 200 | 400
|
|
1700 | wait interface | books | 200 | 400
|
|
(6 rows)
|
|
|
|
CREATE TABLE hw_create_as_test2(C_INT) as SELECT height_in FROM newproducts_row;
|
|
SELECT * FROM hw_create_as_test2;
|
|
c_int
|
|
-------
|
|
600
|
|
600
|
|
600
|
|
600
|
|
(4 rows)
|
|
|
|
DROP TABLE hw_create_as_test2;
|
|
DROP TABLE products_row;
|
|
DROP TABLE newproducts_row;
|
|
DROP TABLE newproducts_base;
|
|
DROP TABLE products_base;
|
|
--bypass test
|
|
INSERT INTO gtest1 values (200);
|
|
SELECT * FROM gtest1;
|
|
a | b
|
|
-----+-----
|
|
1 | 2
|
|
2 | 4
|
|
3 | 6
|
|
4 | 8
|
|
200 | 400
|
|
(5 rows)
|
|
|
|
UPDATE gtest1 set a = 300 where a = 200;
|
|
SELECT * FROM gtest1;
|
|
a | b
|
|
-----+-----
|
|
1 | 2
|
|
2 | 4
|
|
3 | 6
|
|
4 | 8
|
|
300 | 600
|
|
(5 rows)
|
|
|
|
--null test
|
|
CREATE TABLE t1 (id int,id1 integer GENERATED ALWAYS AS (id*2) STORED);
|
|
INSERT INTO t1 values(100);
|
|
SELECT * FROM t1;
|
|
id | id1
|
|
-----+-----
|
|
100 | 200
|
|
(1 row)
|
|
|
|
UPDATE t1 set id = 200;
|
|
SELECT * FROM t1;
|
|
id | id1
|
|
-----+-----
|
|
200 | 400
|
|
(1 row)
|
|
|
|
UPDATE t1 set id = NULL;
|
|
SELECT * FROM t1;
|
|
id | id1
|
|
----+-----
|
|
|
|
|
(1 row)
|
|
|
|
DROP TABLE t1;
|
|
--cstore not support
|
|
CREATE TABLE t2(height_cm int,height_in int GENERATED ALWAYS AS (height_cm * 2) STORED) WITH (ORIENTATION = COLUMN);
|
|
ERROR: column/timeseries store unsupport constraint "GENERATED COL"
|
|
--ustore engine test
|
|
CREATE TABLE ustoretest (a int PRIMARY KEY, b int, c int GENERATED ALWAYS AS (a * 2) STORED) WITH (STORAGE_TYPE = USTORE, init_td=32);
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "ustoretest_pkey" for table "ustoretest"
|
|
INSERT INTO ustoretest(a,b) values(2,3),(4,5);
|
|
SELECT * FROM ustoretest;
|
|
a | b | c
|
|
---+---+---
|
|
2 | 3 | 4
|
|
4 | 5 | 8
|
|
(2 rows)
|
|
|
|
UPDATE ustoretest SET a=7 WHERE a=2;
|
|
SELECT * FROM ustoretest;
|
|
a | b | c
|
|
---+---+----
|
|
7 | 3 | 14
|
|
4 | 5 | 8
|
|
(2 rows)
|
|
|
|
DROP TABLE ustoretest;
|
|
DROP TABLE gtest0;
|
|
DROP TABLE gtest1;
|
|
DROP TABLE gtest2;
|
|
DROP TABLE gtest3;
|
|
DROP TABLE gtest10;
|