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86e9b131c7
It can be not that special to have Merge engine w/o default expression, while MergeTree will have it. So improve PREWHERE for such kinds, and also allow PREWHERE for DEFAULT and MATERIALIZED (since both are physical columns on disk and this make sense). Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
39 lines
827 B
SQL
39 lines
827 B
SQL
-- Allow PREWHERE when Merge() and MergeTree has different DEFAULT expression
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DROP TABLE IF EXISTS m;
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DROP TABLE IF EXISTS t1;
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DROP TABLE IF EXISTS t2;
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CREATE TABLE m
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(
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`a` String,
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`f` UInt8 DEFAULT 0
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)
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ENGINE = Merge(currentDatabase(), '^(t1|t2)$');
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CREATE TABLE t1
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(
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a String,
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f UInt8 DEFAULT 1
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)
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ENGINE = MergeTree
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ORDER BY tuple()
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SETTINGS index_granularity = 8192;
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INSERT INTO t1 (a) VALUES ('OK');
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CREATE TABLE t2
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(
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a String,
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f UInt8 DEFAULT 2
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)
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ENGINE = MergeTree
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ORDER BY tuple()
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SETTINGS index_granularity = 8192;
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INSERT INTO t2 (a) VALUES ('OK');
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-- { echoOn }
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SELECT * FROM m PREWHERE a = 'OK' ORDER BY a, f;
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SELECT * FROM m PREWHERE f = 1 ORDER BY a, f;
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SELECT * FROM m WHERE f = 0 SETTINGS optimize_move_to_prewhere=0;
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SELECT * FROM m WHERE f = 0 SETTINGS optimize_move_to_prewhere=1;
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