MDEV-16741 Assertion `m_extra_cache' failed in ha_partition::late_ext…

…ra_cache

multi_delete sets TABLE::no_cache=1 and should set it to 0 when DELETE is done.

mysql-test/suite/parts/r/update_and_cache.result

@@ -0,0 +1,7 @@
+CREATE TABLE t1 (pk INT PRIMARY KEY, a INT);
+INSERT INTO t1 VALUES (1,10),(2,20);
+CREATE TABLE t2 (b INT) PARTITION BY KEY (b) PARTITIONS 2;
+INSERT INTO t2 VALUES (1),(2);
+DELETE t2 FROM t2 WHERE b BETWEEN 5 AND 9;
+UPDATE t2 JOIN t1 SET b = 5;
+DROP TABLE t1, t2;

mysql-test/suite/parts/t/update_and_cache.test

@@ -0,0 +1,12 @@
+--source include/have_partition.inc
+
+CREATE TABLE t1 (pk INT PRIMARY KEY, a INT);
+INSERT INTO t1 VALUES (1,10),(2,20);
+
+CREATE TABLE t2 (b INT) PARTITION BY KEY (b) PARTITIONS 2;
+INSERT INTO t2 VALUES (1),(2);
+
+DELETE t2 FROM t2 WHERE b BETWEEN 5 AND 9;
+UPDATE t2 JOIN t1 SET b = 5;
+
+DROP TABLE t1, t2;

sql/sql_delete.cc

@@ -744,6 +744,7 @@ multi_delete::~multi_delete()
   {
     TABLE *table= table_being_deleted->table;
     table->no_keyread=0;
+    table->no_cache= 0;
   }
 
   for (uint counter= 0; counter < num_of_tables; counter++)

sql/sql_update.cc

@@ -1868,7 +1868,7 @@ multi_update::~multi_update()
   TABLE_LIST *table;
   for (table= update_tables ; table; table= table->next_local)
   {
-    table->table->no_keyread= table->table->no_cache= 0;
+    table->table->no_keyread= 0;
     if (ignore)
       table->table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
   }