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34 lines
1.2 KiB
Plaintext
34 lines
1.2 KiB
Plaintext
-- { echo }
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CREATE FUNCTION 02483_plusone AS (a) -> a + 1;
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CREATE TABLE 02483_substitute_udf (id UInt32, number UInt32 DEFAULT 02483_plusone(id)) ENGINE=MergeTree() ORDER BY id;
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DESC TABLE 02483_substitute_udf;
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id UInt32
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number UInt32 DEFAULT id + 1
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INSERT INTO 02483_substitute_udf (id, number) VALUES (1, NULL);
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SELECT * FROM 02483_substitute_udf ORDER BY id;
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1 2
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CREATE FUNCTION 02483_plustwo AS (a) -> a + 2;
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ALTER TABLE 02483_substitute_udf MODIFY COLUMN number UInt32 DEFAULT 02483_plustwo(id);
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DESC TABLE 02483_substitute_udf;
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id UInt32
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number UInt32 DEFAULT id + 2
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INSERT INTO 02483_substitute_udf (id, number) VALUES (5, NULL);
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SELECT * FROM 02483_substitute_udf ORDER BY id;
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1 2
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5 7
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CREATE FUNCTION 02483_plusthree AS (a) -> a + 3;
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ALTER TABLE 02483_substitute_udf DROP COLUMN number;
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ALTER TABLE 02483_substitute_udf ADD COLUMN new_number UInt32 DEFAULT 02483_plusthree(id);
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DESC TABLE 02483_substitute_udf;
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id UInt32
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new_number UInt32 DEFAULT id + 3
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INSERT INTO 02483_substitute_udf (id, new_number) VALUES (10, NULL);
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SELECT * FROM 02483_substitute_udf ORDER BY id;
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1 4
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5 8
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10 13
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DROP TABLE 02483_substitute_udf;
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DROP FUNCTION 02483_plusone;
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DROP FUNCTION 02483_plustwo;
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DROP FUNCTION 02483_plusthree;
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