Fixed bug mdev-10783.

Do not push conditions into materialized views/derived tables
marked with the flag 'fill_me'.

Author: igorbabaev

mysql-test/r/derived_cond_pushdown.result

@@ -7007,3 +7007,12 @@ WHERE f = 1;
 f
 1
 DROP TABLE t1;
+#
+# MDEV-10783: pushdown into constant view
+#
+CREATE TABLE t1 (i int) ENGINE=MyISAM;
+CREATE VIEW v AS SELECT 5;
+SELECT * FROM t1 WHERE 1 IN ( SELECT * FROM v );
+i
+DROP VIEW v;
+DROP TABLE t1;

mysql-test/t/derived_cond_pushdown.test

@@ -898,5 +898,13 @@ SELECT *
     WHERE f = 1;
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-10783: pushdown into constant view
+--echo #
 
-  
+CREATE TABLE t1 (i int) ENGINE=MyISAM;
+CREATE VIEW v AS SELECT 5;
+SELECT * FROM t1 WHERE 1 IN ( SELECT * FROM v );
+DROP VIEW v;
+DROP TABLE t1; 
+ 

sql/sql_derived.cc

@@ -1144,6 +1144,10 @@ bool pushdown_cond_for_derived(THD *thd, Item *cond, TABLE_LIST *derived)
   if (!any_select_allows_cond_pushdown)
     return false; 
 
+  /* Do not push conditions into constant derived */
+  if (derived->fill_me)
+    return false;
+
   /* Do not push conditions into recursive with tables */
   if (derived->is_recursive_with_table())
     return false;