34 lines
1.1 KiB
Plaintext
34 lines
1.1 KiB
Plaintext
CREATE TABLE delete_test (
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id SERIAL PRIMARY KEY,
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a INT,
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b text
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);
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INSERT INTO delete_test (a) VALUES (10);
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INSERT INTO delete_test (a, b) VALUES (50, repeat('x', 10000));
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INSERT INTO delete_test (a) VALUES (100);
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-- allow an alias to be specified for DELETE's target table
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DELETE FROM delete_test AS dt WHERE dt.a > 75;
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-- if an alias is specified, don't allow the original table name
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-- to be referenced
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DELETE FROM delete_test dt WHERE delete_test.a > 25;
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ERROR: invalid reference to FROM-clause entry for table "delete_test"
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LINE 1: DELETE FROM delete_test dt WHERE delete_test.a > 25;
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^
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HINT: Perhaps you meant to reference the table alias "dt".
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SELECT id, a, char_length(b) FROM delete_test;
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id | a | char_length
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----+----+-------------
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1 | 10 |
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2 | 50 | 10000
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(2 rows)
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-- delete a row with a TOASTed value
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DELETE FROM delete_test WHERE a > 25;
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SELECT id, a, char_length(b) FROM delete_test;
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id | a | char_length
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----+----+-------------
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1 | 10 |
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(1 row)
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DROP TABLE delete_test;
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