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Bug#49501 Inefficient information_schema check (system collation)

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added check_length optimization for I_S_NAME comparison
This commit is contained in:
Sergey Glukhov
2010-01-19 13:03:40 +04:00
parent 22cff39274
commit baacdf1dae
9 changed files with 49 additions and 41 deletions
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5
sql/table.cc
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@ -212,10 +212,7 @@ TABLE_CATEGORY get_table_category(const LEX_STRING *db, const LEX_STRING *name)
DBUG_ASSERT(db != NULL);
DBUG_ASSERT(name != NULL);
if ((db->length == INFORMATION_SCHEMA_NAME.length) &&
(my_strcasecmp(system_charset_info,
INFORMATION_SCHEMA_NAME.str,
db->str) == 0))
if (is_schema_db(db->str, db->length))
{
return TABLE_CATEGORY_INFORMATION;
}