diff options
Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index 43b6f83d568..fc9b4262394 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -2781,6 +2781,13 @@ static Sys_var_ulong Sys_optimizer_search_depth( SESSION_VAR(optimizer_search_depth), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, MAX_TABLES+1), DEFAULT(MAX_TABLES+1), BLOCK_SIZE(1)); +static Sys_var_ulong Sys_optimizer_extra_pruning_depth( + "optimizer_extra_pruning_depth", + "If the optimizer needs to enumerate join prefix of this size or " + "larger, then it will try agressively prune away the search space.", + SESSION_VAR(optimizer_extra_pruning_depth), CMD_LINE(REQUIRED_ARG), + VALID_RANGE(0, MAX_TABLES+1), DEFAULT(8), BLOCK_SIZE(1)); + /* this is used in the sigsegv handler */ export const char *optimizer_switch_names[]= { |