diff options
| author | unknown <sergefp@mysql.com> | 2005-04-29 01:16:32 +0400 |
|---|---|---|
| committer | unknown <sergefp@mysql.com> | 2005-04-29 01:16:32 +0400 |
| commit | 58334f8360065ba62931376f98c2f267d6115a99 (patch) | |
| tree | 7eeb44b398d001527e547842929d2a9e2063d988 /sql/opt_range.cc | |
| parent | 6b0a72679c62c75540b687e06998f5037cdc1a4d (diff) | |
| download | mariadb-git-58334f8360065ba62931376f98c2f267d6115a99.tar.gz | |
Fix for BUG#10244:
Make get_quick_select_for_ref() accept estimated # records as parameter and
set QUICK_RANGE_SELECT::records, as this value is used to allocate buffers
in Multi-Range Read.
sql/opt_range.cc:
Make get_quick_select_for_ref() accept estimated # records as parameter and
set QUICK_RANGE_SELECT::records, as this value is used to allocate buffers
in Multi-Range Read.
sql/opt_range.h:
Added "records" parameter to get_quick_select_for_ref()
sql/sql_select.cc:
Added "records" parameter to get_quick_select_for_ref()
Diffstat (limited to 'sql/opt_range.cc')
| -rw-r--r-- | sql/opt_range.cc | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/sql/opt_range.cc b/sql/opt_range.cc index 95fe003770b..7dfee132ea9 100644 --- a/sql/opt_range.cc +++ b/sql/opt_range.cc @@ -5513,14 +5513,26 @@ bool QUICK_ROR_UNION_SELECT::check_if_keys_used(List<Item> *fields) } -/**************************************************************************** - Create a QUICK RANGE based on a key - This allocates things in a new memory root, as this may be called many times - during a query. -****************************************************************************/ +/* + Create quick select from ref/ref_or_null scan. + SYNOPSIS + get_quick_select_for_ref() + thd Thread handle + table Table to access + ref ref[_or_null] scan parameters + records Estimate of number of records (needed only to construct + quick select) + NOTES + This allocates things in a new memory root, as this may be called many + times during a query. + + RETURN + Quick select that retrieves the same rows as passed ref scan + NULL on error. +*/ QUICK_RANGE_SELECT *get_quick_select_for_ref(THD *thd, TABLE *table, - TABLE_REF *ref) + TABLE_REF *ref, ha_rows records) { MEM_ROOT *old_root= thd->mem_root; /* The following call may change thd->mem_root */ @@ -5537,6 +5549,7 @@ QUICK_RANGE_SELECT *get_quick_select_for_ref(THD *thd, TABLE *table, delete quick; goto err; } + quick->records= records; if (cp_buffer_from_ref(thd,ref) && thd->is_fatal_error || !(range= new QUICK_RANGE())) |