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BUG#18558 "Partition pruning results are incorrect for certain class of WHERE clauses" :

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* Produce right results for conditions that were transformed to "(partitioning_range) AND
  (list_of_subpartitioning_ranges)": make each partition id set iterator auto-reset itself
  after it has returned all partition ids in the sequence 
* Fix "Range mapping" and "Range mapping" partitioning interval analysis functions to 
  correctly deal with NULL values. 


mysql-test/r/partition_pruning.result:
  Testcase for BUG#18558
mysql-test/t/partition_pruning.test:
  Testcase for BUG#18558
sql/opt_range.cc:
  BUG#18558: Move partition set iterator initialization to sql_partition.cc, comment fixes
sql/partition_info.h:
  BUG#18558: Make each partition set iterator auto-reset itself after it has returned all 
  partition ids in the set it enumerates.
sql/sql_partition.cc:
  BUG#18558: 
  - Make each partition set iterator auto-reset itself after it has returned all 
    partition ids in the set it enumerates. 
  - Fix partition interval analysis to correctly handle intervals with one or both
    NULL bounds.
sql/sql_partition.h:
  BUG#18558: 
   - Make each partition set iterator auto-reset itself after it has returned all 
     partition ids in the set it enumerates. 
   - Rename PARTITION_ITERATOR::has_null_value to ret_null_part
This commit is contained in:
unknown
2006-04-06 21:23:33 +04:00
parent 3d34946e76
commit 4d1666f6b8
6 changed files with 208 additions and 48 deletions
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4
sql/opt_range.cc
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@@ -2296,8 +2296,6 @@ bool prune_partitions(THD *thd, TABLE *table, Item *pprune_cond)
RANGE_OPT_PARAM *range_par= &prune_param.range_param;
prune_param.part_info= part_info;
prune_param.part_iter.has_null_value= FALSE;
init_sql_alloc(&alloc, thd->variables.range_alloc_block_size, 0);
range_par->mem_root= &alloc;
range_par->old_root= thd->mem_root;
@@ -2730,7 +2728,7 @@ int find_used_partitions(PART_PRUNE_PARAM *ppar, SEL_ARG *key_tree)
key_tree->min_flag | key_tree->max_flag,
&ppar->part_iter);
if (!res)
goto go_right; /* res=0 --> no satisfying partitions */
goto go_right; /* res==0 --> no satisfying partitions */
if (res == -1)
{
//get a full range iterator