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BUG#20492: Subsequent calls to stored procedure yield incorrect result

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if join is used

For procedures with selects that use complicated joins with ON expression
re-execution could erroneously ignore this ON expression, giving
incorrect result.

The problem was that optimized ON expression wasn't saved for
re-execution.  The solution is to properly save it.


mysql-test/r/sp.result:
  Add result for bug#20492: Subsequent calls to stored procedure yield
  incorrect result if join is used.
mysql-test/t/sp.test:
  Add test case for bug#20492: Subsequent calls to stored procedure yield
  incorrect result if join is used.
sql/sql_select.cc:
  Save modified ON expression for re-execution.
This commit is contained in:
unknown
2006-09-07 18:51:00 +04:00
parent 33294b1b50
commit ee09b41ea2
3 changed files with 75 additions and 3 deletions
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11
sql/sql_select.cc
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@ -7427,9 +7427,14 @@ simplify_joins(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top)
*/
expr= simplify_joins(join, &nested_join->join_list,
expr, FALSE);
table->on_expr= expr;
if (!table->prep_on_expr)
if (!table->prep_on_expr || expr != table->on_expr)
{
DBUG_ASSERT(expr);
table->on_expr= expr;
table->prep_on_expr= expr->copy_andor_structure(join->thd);
}
}
nested_join->used_tables= (table_map) 0;
nested_join->not_null_tables=(table_map) 0;
@ -7439,7 +7444,7 @@ simplify_joins(JOIN *join, List<TABLE_LIST> *join_list, COND *conds, bool top)
}
else
{
if (!(table->prep_on_expr))
if (!table->prep_on_expr)
table->prep_on_expr= table->on_expr;
used_tables= table->table->map;
if (conds)