MDEV-36888 Assertion `typeid(*copy) == typeid(*this)' in Item_func_or_sum::do_build_clone

Problems was in forgotten Item type in two places: clone and finding origin field.

The handling added.

Author: sanja-byelkin

mysql-test/main/view.result

@@ -7076,5 +7076,15 @@ ERROR 22007: Truncated incorrect DECIMAL value: ''
 DROP VIEW v1;
 DROP TABLE t1, t2;
 #
-# End of 10.6 tests
+# MDEV-36888: Assertion `typeid(*copy) == typeid(*this)' in
+# Item_func_or_sum::do_build_clone
 #
+CREATE TABLE t (a INT default 1);
+INSERT INTO t VALUES (0),(2);
+CREATE ALGORITHM=TEMPTABLE VIEW v AS SELECT * FROM t;
+EXECUTE IMMEDIATE "SELECT * FROM v WHERE COERCIBILITY(VALUE(a)) > a";
+a
+0
+drop view v;
+drop table t;
+# End of 10.6 tests

mysql-test/main/view.test

@@ -6839,5 +6839,14 @@ DROP VIEW v1;
 DROP TABLE t1, t2;
 
 --echo #
---echo # End of 10.6 tests
+--echo # MDEV-36888: Assertion `typeid(*copy) == typeid(*this)' in
+--echo # Item_func_or_sum::do_build_clone
 --echo #
+CREATE TABLE t (a INT default 1);
+INSERT INTO t VALUES (0),(2);
+CREATE ALGORITHM=TEMPTABLE VIEW v AS SELECT * FROM t;
+EXECUTE IMMEDIATE "SELECT * FROM v WHERE COERCIBILITY(VALUE(a)) > a";
+drop view v;
+drop table t;
+
+--echo # End of 10.6 tests

sql/item.cc

@@ -8026,6 +8026,7 @@ Item *find_producing_item(Item *item, st_select_lex *sel)
 {
   DBUG_ASSERT(item->type() == Item::FIELD_ITEM ||
               item->type() == Item::TRIGGER_FIELD_ITEM ||
+              item->type() == Item::INSERT_VALUE_ITEM ||
               (item->type() == Item::REF_ITEM &&
                ((Item_ref *) item)->ref_type() == Item_ref::VIEW_REF)); 
   Item_field *field_item= NULL;

sql/item.h

@@ -7201,6 +7201,8 @@ class Item_insert_value : public Item_field
   {
     return mark_unsupported_function("value()", arg, VCOL_IMPOSSIBLE);
   }
+  Item *do_get_copy(THD *thd) const override
+  { return get_item_copy<Item_insert_value>(thd, this); }
 };