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Backport of subquery optimizations to 5.3.

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There are still test failures because of:
- Wrong query results in outer join + semi join
- EXPLAIN output differences
This commit is contained in:
Sergey Petrunya
2010-01-17 17:51:10 +03:00
parent 1a490f2da4
commit b83cb52e9e
57 changed files with 30727 additions and 504 deletions
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59
sql/sql_test.cc
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@ -213,6 +213,44 @@ TEST_join(JOIN *join)
}
#define FT_KEYPART (MAX_REF_PARTS+10)
void print_keyuse(KEYUSE *keyuse)
{
char buff[256];
char buf2[64];
const char *fieldname;
String str(buff,(uint32) sizeof(buff), system_charset_info);
str.length(0);
keyuse->val->print(&str, QT_ORDINARY);
str.append('\0');
if (keyuse->keypart == FT_KEYPART)
fieldname= "FT_KEYPART";
else
fieldname= keyuse->table->key_info[keyuse->key].key_part[keyuse->keypart].field->field_name;
longlong2str(keyuse->used_tables, buf2, 16);
DBUG_LOCK_FILE;
fprintf(DBUG_FILE, "KEYUSE: %s.%s=%s optimize= %d used_tables=%s "
"ref_table_rows= %lu keypart_map= %0lx\n",
keyuse->table->alias, fieldname, str.ptr(),
keyuse->optimize, buf2, (ulong)keyuse->ref_table_rows,
keyuse->keypart_map);
DBUG_UNLOCK_FILE;
//key_part_map keypart_map; --?? there can be several?
}
/* purecov: begin inspected */
void print_keyuse_array(DYNAMIC_ARRAY *keyuse_array)
{
DBUG_LOCK_FILE;
fprintf(DBUG_FILE, "KEYUSE array (%d elements)\n", keyuse_array->elements);
DBUG_UNLOCK_FILE;
for(uint i=0; i < keyuse_array->elements; i++)
print_keyuse((KEYUSE*)dynamic_array_ptr(keyuse_array, i));
}
/*
Print the current state during query optimization.
@ -313,6 +351,27 @@ print_plan(JOIN* join, uint idx, double record_count, double read_time,
DBUG_UNLOCK_FILE;
}
void print_sjm(SJ_MATERIALIZATION_INFO *sjm)
{
DBUG_LOCK_FILE;
fprintf(DBUG_FILE, "\nsemi-join nest{\n");
fprintf(DBUG_FILE, " tables { \n");
for (uint i= 0;i < sjm->tables; i++)
{
fprintf(DBUG_FILE, " %s%s\n",
sjm->positions[i].table->table->alias,
(i == sjm->tables -1)? "": ",");
}
fprintf(DBUG_FILE, " }\n");
fprintf(DBUG_FILE, " materialize_cost= %g\n",
sjm->materialization_cost.total_cost());
fprintf(DBUG_FILE, " rows= %g\n", sjm->rows);
fprintf(DBUG_FILE, "}\n");
DBUG_UNLOCK_FILE;
}
/* purecov: end */
#endif
typedef struct st_debug_lock