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Bug#20577: Partitions: use of to_days() function leads to selection failures
Problem was that the partition containing NULL values was pruned away, since '2001-01-01' < '2001-02-00' but TO_DAYS('2001-02-00') is NULL. Added the NULL partition for RANGE/LIST partitioning on TO_DAYS() function to be scanned too. Also fixed a bug that added ALLOW_INVALID_DATES to sql_mode (SELECT * FROM t WHERE date_col < '1999-99-99' on a RANGE/LIST partitioned table would add it).
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@ -745,7 +745,7 @@ a
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EXPLAIN PARTITIONS SELECT * FROM t1
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WHERE a >= '2004-07-01' AND a <= '2004-09-30';
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id select_type table partitions type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 p407,p408,p409 ALL NULL NULL NULL NULL 9 Using where
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1 SIMPLE t1 p3xx,p407,p408,p409 ALL NULL NULL NULL NULL 18 Using where
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SELECT * from t1
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WHERE (a >= '2004-07-01' AND a <= '2004-09-30') OR
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(a >= '2005-07-01' AND a <= '2005-09-30');
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@ -772,7 +772,7 @@ EXPLAIN PARTITIONS SELECT * from t1
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WHERE (a >= '2004-07-01' AND a <= '2004-09-30') OR
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(a >= '2005-07-01' AND a <= '2005-09-30');
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id select_type table partitions type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 p407,p408,p409,p507,p508,p509 ALL NULL NULL NULL NULL 18 Using where
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1 SIMPLE t1 p3xx,p407,p408,p409,p507,p508,p509 ALL NULL NULL NULL NULL 27 Using where
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DROP TABLE t1;
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create table t1 (a int);
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insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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