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Fixed bug mdev-5028.

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Apparently in a general case a short-cut for the distinct optimization
is invalid if join buffers are used to join tables after the tables whose
values are to selected.
This commit is contained in:
Igor Babaev
2013-10-02 17:59:56 -07:00
parent ec7da1561e
commit 00816a964f
5 changed files with 179 additions and 8 deletions
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5
sql/sql_select.h
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@ -314,8 +314,9 @@ typedef struct st_join_table {
uint used_null_fields;
uint used_uneven_bit_fields;
enum join_type type;
bool cached_eq_ref_table,eq_ref_table,not_used_in_distinct;
bool sorted;
bool cached_eq_ref_table,eq_ref_table;
bool shortcut_for_distinct;
bool sorted;
/*
If it's not 0 the number stored this field indicates that the index
scan has been chosen to access the table data and we expect to scan