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Bug#8670

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Rework to resolve ambigious grammer: conflict in join expression
  handling of parentheses for nested joins and derived tables.
  Tests included of failing statements
Optimize item construction for AND/OR logical expressions


mysql-test/r/select.result:
  Bug#8670
    Tests for failing expressions
mysql-test/t/select.test:
  Bug#8670
    Tests for failing expressions
sql/sql_parse.cc:
  Bug#8670
    method st_select_lex::end_nested_join() returns NULL when
    there are no elements in the join.
sql/sql_yacc.yy:
  Optimize construction for Item_cond_or and Item_cond_and
    Reduces object count in case of complex expressions.
  Bug#8670
    Solve ambigious grammar.
    Fix handling of parentheses in join expressions to
    correct handling of nested joins and derived tables.
This commit is contained in:
unknown
2005-03-16 00:13:23 +00:00
parent a569b08375
commit 8e7c17a868
4 changed files with 213 additions and 53 deletions
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7
sql/sql_parse.cc
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@@ -5852,6 +5852,7 @@ TABLE_LIST *st_select_lex::end_nested_join(THD *thd)
{
TABLE_LIST *ptr;
DBUG_ENTER("end_nested_join");
DBUG_ASSERT(embedding);
ptr= embedding;
join_list= ptr->join_list;
embedding= ptr->embedding;
@@ -5865,6 +5866,12 @@ TABLE_LIST *st_select_lex::end_nested_join(THD *thd)
join_list->push_front(embedded);
ptr= embedded;
}
else
if (nested_join->join_list.elements == 0)
{
join_list->pop();
DBUG_RETURN(0);
}
DBUG_RETURN(ptr);
}