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Change optimizer_use_mrr=auto|disable|force

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to be optimizer_switch flags mrr=on|off and mrr_cost_based=on|off.
This commit is contained in:
Sergey Petrunya
2011-06-03 00:25:58 +04:00
parent c44c1bd188
commit 9482e387e6
14 changed files with 64 additions and 72 deletions
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8
sql/mysqld.cc
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@ -340,6 +340,8 @@ static const char *optimizer_switch_names[]=
"partial_match_rowid_merge",
"partial_match_table_scan",
"subquery_cache",
"mrr",
"mrr_cost_based",
"mrr_sort_keys",
"outer_join_with_cache",
"semijoin_with_cache",
@ -370,6 +372,8 @@ static const unsigned int optimizer_switch_names_len[]=
sizeof("partial_match_rowid_merge") - 1,
sizeof("partial_match_table_scan") - 1,
sizeof("subquery_cache") - 1,
sizeof("mrr") - 1,
sizeof("mrr_cost_based") - 1,
sizeof("mrr_sort_keys") - 1,
sizeof("outer_join_with_cache") - 1,
sizeof("semijoin_with_cache") - 1,
@ -487,6 +491,8 @@ static const char *optimizer_switch_str="index_merge=on,index_merge_union=on,"
"partial_match_rowid_merge=on,"
"partial_match_table_scan=on,"
"subquery_cache=on,"
"mrr=on,"
"mrr_cost_based=off,"
"mrr_sort_keys=on,"
"join_cache_incremental=on,"
"join_cache_hashed=on,"
@ -3731,8 +3737,6 @@ static int init_common_variables(const char *conf_file_name, int argc,
global_system_variables.character_set_results= default_charset_info;
global_system_variables.character_set_client= default_charset_info;
global_system_variables.optimizer_use_mrr= 1;
if (!(character_set_filesystem=
get_charset_by_csname(character_set_filesystem_name,
MY_CS_PRIMARY, MYF(MY_WME))))