BUG#13126: When choosing join order for join with nested joins, don't produce join

orders that cannot be handled by the executioner.


mysql-test/r/bigint.result:
  Added mssing "drop table if exists"
mysql-test/r/join_nested.result:
  Testcase for BUG#13126
mysql-test/t/bigint.test:
  Added mssing "drop table if exists"
mysql-test/t/join_nested.test:
  Testcase for BUG#13126
sql/mysql_priv.h:
  BUG#13126: Added nested_join_map type.
sql/sql_prepare.cc:
  BUG#13126: Don't set NESTED_JOIN::counter to 0 here as it is reset in other place now.
sql/sql_select.cc:
  BUG#13126: When choosing join order for join with nested joins, don't produce join orders
  that the executioner cannot handle. The work is done by check_interleaving_with_nj() and 
  restore_prev_nj_state() functions that are used from the join optimizer to avoid building
  invalid join orders.
sql/sql_select.h:
  BUG#13126: Added JOIN_TAB::embedding_map and JOIN::cur_embedding_map.
sql/table.h:
  BUG#13126: In NESTED_JOIN: added nj_map, added comment about where counter is used.

1 files changed, 9 insertions, 1 deletions

diff --git a/sql/table.h b/sql/table.h
index e76d005f494..00259ec0c18 100644
--- a/sql/table.h
+++ b/sql/table.h
@@ -757,7 +757,15 @@ typedef struct st_nested_join
   table_map         used_tables;     /* bitmap of tables in the nested join */
   table_map         not_null_tables; /* tables that rejects nulls           */
   struct st_join_table *first_nested;/* the first nested table in the plan  */
-  uint              counter;         /* to count tables in the nested join  */
+  /* 
+    Used to count tables in the nested join in 2 isolated places:
+    1. In make_outerjoin_info(). 
+    2. check_interleaving_with_nj/restore_prev_nj_state (these are called
+       by the join optimizer. 
+    Before each use the counters are zeroed by reset_nj_counters.
+  */
+  uint              counter;
+  nested_join_map   nj_map;          /* Bit used to identify this nested join*/
 } NESTED_JOIN;