99 lines
2.8 KiB
SQL
99 lines
2.8 KiB
SQL
--
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-- UPDATE syntax tests
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--
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CREATE TABLE update_test (
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a INT DEFAULT 10,
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b INT,
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c TEXT
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);
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CREATE TABLE upsert_test (
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a INT PRIMARY KEY,
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b TEXT
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);
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INSERT INTO update_test VALUES (5, 10, 'foo');
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INSERT INTO update_test(b, a) VALUES (15, 10);
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SELECT * FROM update_test;
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UPDATE update_test SET a = DEFAULT, b = DEFAULT;
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SELECT * FROM update_test;
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-- aliases for the UPDATE target table
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UPDATE update_test AS t SET b = 10 WHERE t.a = 10;
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SELECT * FROM update_test;
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UPDATE update_test t SET b = t.b + 10 WHERE t.a = 10;
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SELECT * FROM update_test;
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--
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-- Test VALUES in FROM
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--
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UPDATE update_test SET a=v.i FROM (VALUES(100, 20)) AS v(i, j)
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WHERE update_test.b = v.j;
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SELECT * FROM update_test;
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--
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-- Test multiple-set-clause syntax
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--
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INSERT INTO update_test SELECT a,b+1,c FROM update_test;
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SELECT * FROM update_test;
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UPDATE update_test SET (c,b,a) = ('bugle', b+11, DEFAULT) WHERE c = 'foo';
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SELECT * FROM update_test;
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UPDATE update_test SET (c,b) = ('car', a+b), a = a + 1 WHERE a = 10;
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SELECT * FROM update_test;
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-- fail, multi assignment to same column:
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UPDATE update_test SET (c,b) = ('car', a+b), b = a + 1 WHERE a = 10;
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-- uncorrelated sub-select:
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UPDATE update_test
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SET (b,a) = (select a,b from update_test where b = 41 and c = 'car')
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WHERE a = 100 AND b = 20;
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SELECT * FROM update_test;
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-- correlated sub-select:
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UPDATE update_test o
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SET (b,a) = (select a+1,b from update_test i
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where i.a=o.a and i.b=o.b and i.c is not distinct from o.c);
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SELECT * FROM update_test;
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-- fail, multiple rows supplied:
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UPDATE update_test SET (b,a) = (select a+1,b from update_test);
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-- set to null if no rows supplied:
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UPDATE update_test SET (b,a) = (select a+1,b from update_test where a = 1000)
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WHERE a = 11;
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SELECT * FROM update_test;
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-- if an alias for the target table is specified, don't allow references
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-- to the original table name
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UPDATE update_test AS t SET b = update_test.b + 10 WHERE t.a = 10;
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-- Make sure that we can update to a TOASTed value.
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UPDATE update_test SET c = repeat('x', 10000) WHERE c = 'car';
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SELECT a, b, char_length(c) FROM update_test;
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-- Test ON CONFLICT DO UPDATE
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INSERT INTO upsert_test VALUES(1, 'Boo');
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-- uncorrelated sub-select:
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WITH aaa AS (SELECT 1 AS a, 'Foo' AS b) INSERT INTO upsert_test
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VALUES (1, 'Bar') ON CONFLICT(a)
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DO UPDATE SET (b, a) = (SELECT b, a FROM aaa) RETURNING *;
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-- correlated sub-select:
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INSERT INTO upsert_test VALUES (1, 'Baz') ON CONFLICT(a)
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DO UPDATE SET (b, a) = (SELECT b || ', Correlated', a from upsert_test i WHERE i.a = upsert_test.a)
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RETURNING *;
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-- correlated sub-select (EXCLUDED.* alias):
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INSERT INTO upsert_test VALUES (1, 'Bat') ON CONFLICT(a)
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DO UPDATE SET (b, a) = (SELECT b || ', Excluded', a from upsert_test i WHERE i.a = excluded.a)
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RETURNING *;
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DROP TABLE update_test;
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DROP TABLE upsert_test;
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