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@ -13,7 +13,13 @@ CREATE MATERIALIZED VIEW null_mv Engine = Log AS SELECT * FROM null_table LEFT J
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CREATE TABLE null_table_buffer (number UInt64) ENGINE = Buffer(currentDatabase(), null_table, 1, 1, 1, 100, 200, 10000, 20000);
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INSERT INTO null_table_buffer VALUES (1);
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SELECT sleep(3) FORMAT Null;
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-- OPTIMIZE query should flush Buffer table, but still it is not guaranteed
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-- (see the comment StorageBuffer::optimize)
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-- But the combination of OPTIMIZE + sleep + OPTIMIZE should be enough.
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OPTIMIZE TABLE null_table_buffer;
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SELECT sleep(1) FORMAT Null;
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OPTIMIZE TABLE null_table_buffer;
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-- Insert about should've landed into `null_mv`
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SELECT count() FROM null_mv;
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