Merge 5.3 -> 5.5

mysql-test/r/subselect_sj.result

@@ -2783,6 +2783,16 @@ a	b
 deallocate prepare stmt;
 drop table t1,t2;
 #
+# MDEV-4335: Unexpected results when selecting on information_schema
+#
+CREATE TABLE t1 (db VARCHAR(64) DEFAULT NULL);
+INSERT INTO t1 VALUES ('mysql'),('information_schema');
+SELECT * FROM t1 WHERE db IN (SELECT `SCHEMA_NAME` FROM information_schema.SCHEMATA);
+db
+mysql
+information_schema
+DROP TABLE t1;
+#
 # MySQL Bug#13340270: assertion table->sort.record_pointers == __null
 #
 CREATE TABLE t1 (

mysql-test/r/subselect_sj_jcl6.result

@@ -2797,6 +2797,16 @@ a	b
 deallocate prepare stmt;
 drop table t1,t2;
 #
+# MDEV-4335: Unexpected results when selecting on information_schema
+#
+CREATE TABLE t1 (db VARCHAR(64) DEFAULT NULL);
+INSERT INTO t1 VALUES ('mysql'),('information_schema');
+SELECT * FROM t1 WHERE db IN (SELECT `SCHEMA_NAME` FROM information_schema.SCHEMATA);
+db
+information_schema
+mysql
+DROP TABLE t1;
+#
 # MySQL Bug#13340270: assertion table->sort.record_pointers == __null
 #
 CREATE TABLE t1 (

mysql-test/t/subselect_sj.test

@@ -2481,6 +2481,15 @@ execute stmt;
 deallocate prepare stmt;
 drop table t1,t2;
 
+--echo #
+--echo # MDEV-4335: Unexpected results when selecting on information_schema
+--echo #
+CREATE TABLE t1 (db VARCHAR(64) DEFAULT NULL); 
+INSERT INTO t1 VALUES ('mysql'),('information_schema'); 
+SELECT * FROM t1 WHERE db IN (SELECT `SCHEMA_NAME` FROM information_schema.SCHEMATA); 
+DROP TABLE t1;
+
+
 --echo #
 --echo # MySQL Bug#13340270: assertion table->sort.record_pointers == __null
 --echo #

sql/opt_range.cc

@@ -1996,7 +1996,7 @@ int QUICK_ROR_INTERSECT_SELECT::init()
     1  error
 */
 
-int QUICK_RANGE_SELECT::init_ror_merged_scan(bool reuse_handler)
+int QUICK_RANGE_SELECT::init_ror_merged_scan(bool reuse_handler, MEM_ROOT *alloc)
 {
   handler *save_file= file, *org_file;
   my_bool org_key_read;
@@ -2024,7 +2024,7 @@ int QUICK_RANGE_SELECT::init_ror_merged_scan(bool reuse_handler)
     DBUG_RETURN(0);
   }
 
-  if (!(file= head->file->clone(head->s->normalized_path.str, thd->mem_root)))
+  if (!(file= head->file->clone(head->s->normalized_path.str, alloc)))
   {
     /* 
       Manually set the error flag. Note: there seems to be quite a few
@@ -2125,7 +2125,8 @@ failure:
     0     OK
     other error code
 */
-int QUICK_ROR_INTERSECT_SELECT::init_ror_merged_scan(bool reuse_handler)
+int QUICK_ROR_INTERSECT_SELECT::init_ror_merged_scan(bool reuse_handler, 
+                                                     MEM_ROOT *alloc)
 {
   List_iterator_fast<QUICK_SELECT_WITH_RECORD> quick_it(quick_selects);
   QUICK_SELECT_WITH_RECORD *cur;
@@ -2142,7 +2143,7 @@ int QUICK_ROR_INTERSECT_SELECT::init_ror_merged_scan(bool reuse_handler)
       There is no use of this->file. Use it for the first of merged range
       selects.
     */
-    int error= quick->init_ror_merged_scan(TRUE);
+    int error= quick->init_ror_merged_scan(TRUE, alloc);
     if (error)
       DBUG_RETURN(error);
     quick->file->extra(HA_EXTRA_KEYREAD_PRESERVE_FIELDS);
@@ -2154,7 +2155,7 @@ int QUICK_ROR_INTERSECT_SELECT::init_ror_merged_scan(bool reuse_handler)
     const MY_BITMAP * const save_read_set= quick->head->read_set;
     const MY_BITMAP * const save_write_set= quick->head->write_set;
 #endif
-    if (quick->init_ror_merged_scan(FALSE))
+    if (quick->init_ror_merged_scan(FALSE, alloc))
       DBUG_RETURN(1);
     quick->file->extra(HA_EXTRA_KEYREAD_PRESERVE_FIELDS);
 
@@ -2188,7 +2189,7 @@ int QUICK_ROR_INTERSECT_SELECT::init_ror_merged_scan(bool reuse_handler)
 int QUICK_ROR_INTERSECT_SELECT::reset()
 {
   DBUG_ENTER("QUICK_ROR_INTERSECT_SELECT::reset");
-  if (!scans_inited && init_ror_merged_scan(TRUE))
+  if (!scans_inited && init_ror_merged_scan(TRUE, &alloc))
     DBUG_RETURN(1);
   scans_inited= TRUE;
   List_iterator_fast<QUICK_SELECT_WITH_RECORD> it(quick_selects);
@@ -2324,7 +2325,7 @@ int QUICK_ROR_UNION_SELECT::reset()
     List_iterator_fast<QUICK_SELECT_I> it(quick_selects);
     while ((quick= it++))
     {
-      if (quick->init_ror_merged_scan(FALSE))
+      if (quick->init_ror_merged_scan(FALSE, &alloc))
         DBUG_RETURN(1);
     }
     scans_inited= TRUE;

sql/opt_range.h

@@ -323,7 +323,7 @@ public:
       0     Ok
       other Error
   */
-  virtual int init_ror_merged_scan(bool reuse_handler)
+  virtual int init_ror_merged_scan(bool reuse_handler, MEM_ROOT *alloc)
   { DBUG_ASSERT(0); return 1; }
 
   /*
@@ -473,7 +473,7 @@ public:
                       uchar *cur_prefix);
   bool reverse_sorted() { return 0; }
   bool unique_key_range();
-  int init_ror_merged_scan(bool reuse_handler);
+  int init_ror_merged_scan(bool reuse_handler, MEM_ROOT *alloc);
   void save_last_pos()
   { file->position(record); }
   int get_type() { return QS_TYPE_RANGE; }
@@ -722,7 +722,7 @@ public:
 #ifndef DBUG_OFF
   void dbug_dump(int indent, bool verbose);
 #endif
-  int init_ror_merged_scan(bool reuse_handler);
+  int init_ror_merged_scan(bool reuse_handler, MEM_ROOT *alloc);
   bool push_quick_back(MEM_ROOT *alloc, QUICK_RANGE_SELECT *quick_sel_range);
 
   class QUICK_SELECT_WITH_RECORD : public Sql_alloc

sql/opt_subselect.cc

@@ -1509,6 +1509,9 @@ static bool convert_subq_to_sj(JOIN *parent_join, Item_in_subselect *subq_pred)
   */
   parent_lex->leaf_tables.concat(&subq_lex->leaf_tables);
 
+  if (subq_lex->options & OPTION_SCHEMA_TABLE)
+    parent_lex->options |= OPTION_SCHEMA_TABLE;
+
   /*
     Same as above for next_local chain
     (a theory: a next_local chain always starts with ::leaf_tables
@@ -1725,6 +1728,9 @@ static bool convert_subq_to_jtbm(JOIN *parent_join,
   */
   parent_lex->leaf_tables.push_back(jtbm);
 
+  if (subq_pred->unit->first_select()->options & OPTION_SCHEMA_TABLE)
+    parent_lex->options |= OPTION_SCHEMA_TABLE;
+
   /*
     Same as above for TABLE_LIST::next_local chain
     (a theory: a next_local chain always starts with ::leaf_tables