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MDEV-7811: EXPLAIN/ANALYZE FORMAT=JSON should show subquery cache

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This commit is contained in:
Oleksandr Byelkin
2015-03-25 18:27:10 +01:00
committed by Sergei Petrunia
parent 498a264d19
commit c6aee27b73
11 changed files with 401 additions and 9 deletions
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15
sql/sql_expression_cache.cc
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@ -43,7 +43,7 @@ ulong subquery_cache_miss, subquery_cache_hit;
Expression_cache_tmptable::Expression_cache_tmptable(THD *thd,
List<Item> &dependants,
Item *value)
:cache_table(NULL), table_thd(thd), items(dependants), val(value),
:cache_table(NULL), table_thd(thd), stat(NULL), items(dependants), val(value),
hit(0), miss(0), inited (0)
{
DBUG_ENTER("Expression_cache_tmptable::Expression_cache_tmptable");
@ -61,6 +61,9 @@ void Expression_cache_tmptable::disable_cache()
cache_table->file->ha_index_end();
free_tmp_table(table_thd, cache_table);
cache_table= NULL;
flush_stat();
if (stat)
stat->cache= NULL;
}
@ -164,6 +167,7 @@ void Expression_cache_tmptable::init()
goto error;
}
flush_stat();
DBUG_VOID_RETURN;
error:
@ -180,6 +184,11 @@ Expression_cache_tmptable::~Expression_cache_tmptable()
if (cache_table)
disable_cache();
else
{
flush_stat();
stat= NULL;
}
}
@ -323,3 +332,7 @@ void Expression_cache_tmptable::print(String *str, enum_query_type query_type)
}
str->append('>');
}
const char *Expression_cache_stat::state_str[3]=
{"UNINITIALYZED", "DISABLED", "ENABLED"};