32 lines
868 B
MySQL
32 lines
868 B
MySQL
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CREATE TABLE t (i int PRIMARY KEY);
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INSERT INTO t SELECT generate_series(1, 5);
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SELECT create_immv('mv', 'SELECT * FROM t');
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SELECT immvrelid, ispopulated FROM pg_ivm_immv ORDER BY 1;
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-- refresh immv without changing the ispopulated flag
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SELECT refresh_immv('mv', true);
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SELECT immvrelid, ispopulated FROM pg_ivm_immv ORDER BY 1;
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INSERT INTO t VALUES(6);
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SELECT i FROM mv ORDER BY 1;
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-- change ispopulated to False
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SELECT refresh_immv('mv', false);
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SELECT immvrelid, ispopulated FROM pg_ivm_immv ORDER BY 1;
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SELECT i FROM mv ORDER BY 1;
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-- immv remains empty
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INSERT INTO t VALUES(7);
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SELECT i FROM mv ORDER BY 1;
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-- chaneg ispopulated to True, immv is updated
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SELECT refresh_immv('mv', true);
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SELECT immvrelid, ispopulated FROM pg_ivm_immv ORDER BY 1;
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SELECT i FROM mv ORDER BY 1;
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-- immediate maintenance
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INSERT INTO t VALUES(8);
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SELECT i FROM mv ORDER BY 1;
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