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Merge mysql.com:/home/timka/mysql/src/5.0-virgin

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into  mysql.com:/home/timka/mysql/src/5.0-bug-15229


mysql-test/r/join.result:
  Auto merged
mysql-test/t/join.test:
  Auto merged
sql/table.cc:
  Auto merged
sql/table.h:
  Auto merged
sql/sql_base.cc:
  SCCS merged
This commit is contained in:
unknown
2006-03-06 11:41:19 +02:00
parent bb453729b8 de1e87bbcd
commit cda64c11d7
5 changed files with 166 additions and 56 deletions
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63
sql/sql_base.cc
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@ -3604,8 +3604,18 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
Field_iterator_table_ref it_1, it_2;
Natural_join_column *nj_col_1, *nj_col_2;
Query_arena *arena, backup;
bool add_columns= TRUE;
bool result= TRUE;
bool first_outer_loop= TRUE;
/*
Leaf table references to which new natural join columns are added
if the leaves are != NULL.
*/
TABLE_LIST *leaf_1= (table_ref_1->nested_join &&
!table_ref_1->is_natural_join) ?
NULL : table_ref_1;
TABLE_LIST *leaf_2= (table_ref_2->nested_join &&
!table_ref_2->is_natural_join) ?
NULL : table_ref_2;
DBUG_ENTER("mark_common_columns");
DBUG_PRINT("info", ("operand_1: %s operand_2: %s",
@ -3614,36 +3624,14 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
*found_using_fields= 0;
arena= thd->activate_stmt_arena_if_needed(&backup);
/*
TABLE_LIST::join_columns could be allocated by the previous call to
store_natural_using_join_columns() for the lower level of nested tables.
*/
if (!table_ref_1->join_columns)
{
if (!(table_ref_1->join_columns= new List<Natural_join_column>))
goto err;
table_ref_1->is_join_columns_complete= FALSE;
}
if (!table_ref_2->join_columns)
{
if (!(table_ref_2->join_columns= new List<Natural_join_column>))
goto err;
table_ref_2->is_join_columns_complete= FALSE;
}
for (it_1.set(table_ref_1); !it_1.end_of_fields(); it_1.next())
{
bool is_created_1;
bool found= FALSE;
const char *field_name_1;
if (!(nj_col_1= it_1.get_or_create_column_ref(&is_created_1)))
if (!(nj_col_1= it_1.get_or_create_column_ref(leaf_1)))
goto err;
field_name_1= nj_col_1->name();
/* If nj_col_1 was just created add it to the list of join columns. */
if (is_created_1)
table_ref_1->join_columns->push_back(nj_col_1);
/*
Find a field with the same name in table_ref_2.
@ -3654,17 +3642,12 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
nj_col_2= NULL;
for (it_2.set(table_ref_2); !it_2.end_of_fields(); it_2.next())
{
bool is_created_2;
Natural_join_column *cur_nj_col_2;
const char *cur_field_name_2;
if (!(cur_nj_col_2= it_2.get_or_create_column_ref(&is_created_2)))
if (!(cur_nj_col_2= it_2.get_or_create_column_ref(leaf_2)))
goto err;
cur_field_name_2= cur_nj_col_2->name();
/* If nj_col_1 was just created add it to the list of join columns. */
if (add_columns && is_created_2)
table_ref_2->join_columns->push_back(cur_nj_col_2);
/*
Compare the two columns and check for duplicate common fields.
A common field is duplicate either if it was already found in
@ -3683,9 +3666,15 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
found= TRUE;
}
}
/* Force it_2.set() to use table_ref_2->join_columns. */
table_ref_2->is_join_columns_complete= TRUE;
add_columns= FALSE;
if (first_outer_loop && leaf_2)
{
/*
Make sure that the next inner loop "knows" that all columns
are materialized already.
*/
leaf_2->is_join_columns_complete= TRUE;
first_outer_loop= FALSE;
}
if (!found)
continue; // No matching field
@ -3769,7 +3758,8 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
++(*found_using_fields);
}
}
table_ref_1->is_join_columns_complete= TRUE;
if (leaf_1)
leaf_1->is_join_columns_complete= TRUE;
/*
Everything is OK.
@ -4625,16 +4615,15 @@ insert_fields(THD *thd, Name_resolution_context *context, const char *db_name,
if (tables->is_natural_join)
{
bool is_created;
TABLE *field_table;
/*
In this case we are sure that the column ref will not be created
because it was already created and stored with the natural join.
*/
Natural_join_column *nj_col;
if (!(nj_col= field_iterator.get_or_create_column_ref(&is_created)))
if (!(nj_col= field_iterator.get_natural_column_ref()))
DBUG_RETURN(TRUE);
DBUG_ASSERT(nj_col->table_field && !is_created);
DBUG_ASSERT(nj_col->table_field);
field_table= nj_col->table_ref->table;
if (field_table)
{