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MDEV-3798: EXPLAIN UPDATE/DELETE

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- Address review feedback: rename nearly any name used by the new EXPLAIN code.
This commit is contained in:
Sergey Petrunya
2013-10-05 09:58:22 +04:00
parent f5fba6564b
commit fedf769f0b
19 changed files with 273 additions and 289 deletions
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16
sql/sql_select.h
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@ -258,7 +258,7 @@ typedef struct st_join_table {
JOIN_TAB_RANGE *bush_children;
/* Special content for EXPLAIN 'Extra' column or NULL if none */
enum Extra_tag info;
enum explain_extra_tag info;
/*
Bitmap of TAB_INFO_* bits that encodes special line for EXPLAIN 'Extra'
@ -1336,7 +1336,7 @@ public:
emb_sjm_nest= NULL;
sjm_lookup_tables= 0;
exec_qpf_saved= false;
exec_saved_explain= false;
/*
The following is needed because JOIN::cleanup(true) may be called for
joins for which JOIN::optimize was aborted with an error before a proper
@ -1344,7 +1344,13 @@ public:
*/
table_access_tabs= NULL;
}
bool exec_qpf_saved;
/*
TRUE <=> There was a JOIN::exec() call, which saved this JOIN's EXPLAIN.
The idea is that we also save at the end of JOIN::optimize(), but that
might not be the final plan.
*/
bool exec_saved_explain;
int prepare(Item ***rref_pointer_array, TABLE_LIST *tables, uint wind_num,
COND *conds, uint og_num, ORDER *order, ORDER *group,
@ -1470,8 +1476,8 @@ public:
{
return (unit->item && unit->item->is_in_predicate());
}
int save_qpf(QPF_query *output, bool need_tmp_table, bool need_order,
bool distinct, const char *message);
int save_explain_data(Explain_query *output, bool need_tmp_table,
bool need_order, bool distinct, const char *message);
private:
/**
TRUE if the query contains an aggregate function but has no GROUP