From 691214ae30dc9ccbb03337075f2c73cdf0ee6929 Mon Sep 17 00:00:00 2001
From: Igor Babaev <igor@askmonty.org>
Date: Wed, 16 Nov 2016 22:16:20 -0800
Subject: [PATCH] Fixed bug mdev-11103. The class Item_func_nop_all missed an
 implementation of the virtual method get_copy. As a result if the condition
 that can be pushed into into a materialized view / derived table contained an
 ANY subselect then the pushdown condition was built incorrectly.

---
 mysql-test/r/derived_cond_pushdown.result | 41 +++++++++++++++++++++++
 mysql-test/t/derived_cond_pushdown.test   | 16 +++++++++
 sql/item_cmpfunc.h                        |  2 ++
 3 files changed, 59 insertions(+)

diff --git a/mysql-test/r/derived_cond_pushdown.result b/mysql-test/r/derived_cond_pushdown.result
index c9fb33213fb..98430509618 100644
--- a/mysql-test/r/derived_cond_pushdown.result
+++ b/mysql-test/r/derived_cond_pushdown.result
@@ -7221,3 +7221,44 @@ EXPLAIN
 }
 DROP VIEW v2;
 DROP TABLE t1,t2;
+#
+# MDEV-11103: pushdown condition with ANY subquery
+#
+CREATE TABLE t1 (i INT);
+CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
+INSERT INTO t1 VALUES (1),(2);
+EXPLAIN FORMAT=JSON
+SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
+EXPLAIN
+{
+  "query_block": {
+    "select_id": 1,
+    "table": {
+      "table_name": "<derived3>",
+      "access_type": "ALL",
+      "rows": 2,
+      "filtered": 100,
+      "attached_condition": "<nop>((v1.i <= 3))",
+      "materialized": {
+        "query_block": {
+          "select_id": 3,
+          "table": {
+            "table_name": "t1",
+            "access_type": "ALL",
+            "rows": 2,
+            "filtered": 100,
+            "attached_condition": "<nop>((t1.i <= 3))"
+          }
+        }
+      }
+    }
+  }
+}
+Warnings:
+Note	1249	Select 2 was reduced during optimization
+SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
+i
+1
+2
+DROP VIEW v1;
+DROP TABLE t1;
diff --git a/mysql-test/t/derived_cond_pushdown.test b/mysql-test/t/derived_cond_pushdown.test
index 0717c1e47e4..1e498661975 100644
--- a/mysql-test/t/derived_cond_pushdown.test
+++ b/mysql-test/t/derived_cond_pushdown.test
@@ -1011,3 +1011,19 @@ SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;
 
 DROP VIEW v2;
 DROP TABLE t1,t2;
+
+--echo #
+--echo # MDEV-11103: pushdown condition with ANY subquery
+--echo #
+
+CREATE TABLE t1 (i INT);
+CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
+INSERT INTO t1 VALUES (1),(2);
+
+EXPLAIN FORMAT=JSON
+SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
+
+SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
+
+DROP VIEW v1;
+DROP TABLE t1;
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 6d432bd97f3..b0120dd6c63 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -649,6 +649,8 @@ public:
   longlong val_int();
   const char *func_name() const { return "<nop>"; }
   Item *neg_transformer(THD *thd);
+  Item *get_copy(THD *thd, MEM_ROOT *mem_root)
+  { return get_item_copy<Item_func_nop_all>(thd, mem_root, this); }
 };