Don't give errors for default value copy in create_tmp_table

mysql-test/main/type_temporal_innodb.result

@@ -160,3 +160,18 @@ SELECT * FROM t1 WHERE LEAST( UTC_TIME(), d );
 d
 2012-12-21
 DROP TABLE t1;
+#
+# MDEV-17969 Assertion `name' failed in THD::push_warning_truncated_value_for_field
+#
+CREATE TABLE t1 (c1 DATE , c2 TIMESTAMP) ENGINE=InnoDB;
+INSERT INTO t1  VALUES ('2006-07-17','0000-00-00 00:00:00');
+CREATE TABLE t2 (pk INT, a1 TIME) Engine=InnoDB;
+INSERT INTO t2 VALUES (6,'00:00:00');
+SET SESSION sql_mode= 'strict_all_tables,no_zero_date';
+CREATE TABLE tbl SELECT * FROM t1 WHERE t1.c1 = (SELECT c2 FROM t2 WHERE pk = 6);
+ERROR 22007: Truncated incorrect datetime value: '0000-00-00 00:00:00'
+DROP TABLE t1,t2;
+SET sql_mode=DEFAULT;
+#
+# End of 10.3 tests
+#

mysql-test/main/type_temporal_innodb.test

@@ -66,3 +66,22 @@ CREATE TABLE t1 (d DATE) ENGINE=InnoDB;
 INSERT INTO t1 VALUES ('2012-12-21');
 SELECT * FROM t1 WHERE LEAST( UTC_TIME(), d );
 DROP TABLE t1;
+
+--echo #
+--echo # MDEV-17969 Assertion `name' failed in THD::push_warning_truncated_value_for_field
+--echo #
+
+CREATE TABLE t1 (c1 DATE , c2 TIMESTAMP) ENGINE=InnoDB;
+INSERT INTO t1  VALUES ('2006-07-17','0000-00-00 00:00:00');
+CREATE TABLE t2 (pk INT, a1 TIME) Engine=InnoDB;
+INSERT INTO t2 VALUES (6,'00:00:00');
+SET SESSION sql_mode= 'strict_all_tables,no_zero_date';
+--error ER_TRUNCATED_WRONG_VALUE
+CREATE TABLE tbl SELECT * FROM t1 WHERE t1.c1 = (SELECT c2 FROM t2 WHERE pk = 6);
+# ^^^ there is no column c2 in table t2
+DROP TABLE t1,t2;
+SET sql_mode=DEFAULT;
+
+--echo #
+--echo # End of 10.3 tests
+--echo #

sql/sql_select.cc

@@ -17460,6 +17460,7 @@ create_tmp_table(THD *thd, TMP_TABLE_PARAM *param, List<Item> &fields,
   bool  using_unique_constraint= false;
   bool  use_packed_rows= false;
   bool  not_all_columns= !(select_options & TMP_TABLE_ALL_COLUMNS);
+  bool  save_abort_on_warning;
   char  *tmpname,path[FN_REFLEN];
   uchar	*pos, *group_buff, *bitmaps;
   uchar *null_flags;
@@ -17932,6 +17933,11 @@ create_tmp_table(THD *thd, TMP_TABLE_PARAM *param, List<Item> &fields,
   }
   null_count= (blob_count == 0) ? 1 : 0;
   hidden_field_count=param->hidden_field_count;
+
+  /* Protect against warnings in field_conv() in the next loop*/
+  save_abort_on_warning= thd->abort_on_warning;
+  thd->abort_on_warning= 0;
+
   for (i=0,reg_field=table->field; i < field_count; i++,reg_field++,recinfo++)
   {
     Field *field= *reg_field;
@@ -18018,6 +18024,7 @@ create_tmp_table(THD *thd, TMP_TABLE_PARAM *param, List<Item> &fields,
   bzero(pos, table->s->reclength - (pos - table->record[0]));
   MEM_CHECK_DEFINED(table->record[0], table->s->reclength);
 
+  thd->abort_on_warning= save_abort_on_warning;
   param->copy_field_end=copy;
   param->recinfo= recinfo;              	// Pointer to after last field
   store_record(table,s->default_values);        // Make empty default record