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This is a full cost-based implementation of the optimization that employs

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splitting technique for equi-joins of materialized derived tables/views/CTEs.
(see mdev-13369 and mdev-13389).
This commit is contained in:
Igor Babaev
2017-12-30 12:29:09 -08:00
parent 7a66e0ab8f
commit 4f0299f8b3
23 changed files with 2511 additions and 600 deletions
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sql/sql_const.h
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@ -231,6 +231,7 @@
*/
#define HEAP_TEMPTABLE_LOOKUP_COST 0.05
#define DISK_TEMPTABLE_LOOKUP_COST 1.0
#define SORT_INDEX_CMP_COST 0.02
#define MY_CHARSET_BIN_MB_MAXLEN 1