diff options
Diffstat (limited to 'sql/table.cc')
| -rw-r--r-- | sql/table.cc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sql/table.cc b/sql/table.cc index 94cd174ffd7..52e63ea7389 100644 --- a/sql/table.cc +++ b/sql/table.cc @@ -4162,6 +4162,8 @@ void TABLE::init(THD *thd, TABLE_LIST *tl) created= TRUE; cond_selectivity= 1.0; cond_selectivity_sampling_explain= NULL; + quick_condition_rows=0; + initialize_quick_structures(); #ifdef HAVE_REPLICATION /* used in RBR Triggers */ master_had_triggers= 0; @@ -7546,3 +7548,22 @@ bool fk_modifies_child(enum_fk_option opt) static bool can_write[]= { false, false, true, true, false, true }; return can_write[opt]; } + + +/* + @brief + Initialize all the quick structures that are used to stored the + estimates when the range optimizer is run. + @details + This is specifically needed when we read the TABLE structure from the + table cache. There can be some garbage data from previous queries + that need to be reset here. +*/ + +void TABLE::initialize_quick_structures() +{ + bzero(quick_rows, sizeof(quick_rows)); + bzero(quick_key_parts, sizeof(quick_key_parts)); + bzero(quick_costs, sizeof(quick_costs)); + bzero(quick_n_ranges, sizeof(quick_n_ranges)); +} |