MDEV-17959 Assertion `opt_bootstrap || mysql_parse_status || thd->lex->select_stack_top == 0' failed in parse_sql upon DELETE HISTORY under ORACLE mode

mysql-test/suite/compat/oracle/r/versioning.result

@@ -14,3 +14,11 @@ SELECT * FROM t1 FOR SYSTEM_TIME AS OF (NOW()+INTERVAL 10 YEAR);
 a
 20
 DROP TABLE t1;
+#
+# MDEV-17959 Assertion `opt_bootstrap || mysql_parse_status || thd->lex->select_stack_top == 0' failed in parse_sql upon DELETE HISTORY under ORACLE mode
+#
+SET SQL_MODE= ORACLE;
+CREATE TABLE t1 (a INT);
+DELETE HISTORY FROM t1;
+ERROR HY000: Table `t1` is not system-versioned
+DROP TABLE t1;

mysql-test/suite/compat/oracle/t/versioning.test

@@ -11,3 +11,13 @@ INSERT INTO t1 VALUES (20);
 SELECT * FROM t1 FOR SYSTEM_TIME ALL;
 SELECT * FROM t1 FOR SYSTEM_TIME AS OF (NOW()+INTERVAL 10 YEAR);
 DROP TABLE t1;
+
+--echo #
+--echo # MDEV-17959 Assertion `opt_bootstrap || mysql_parse_status || thd->lex->select_stack_top == 0' failed in parse_sql upon DELETE HISTORY under ORACLE mode
+--echo #
+
+SET SQL_MODE= ORACLE;
+CREATE TABLE t1 (a INT);
+--error ER_VERS_NOT_VERSIONED
+DELETE HISTORY FROM t1;
+DROP TABLE t1;

sql/sql_yacc_ora.yy

@@ -13679,6 +13679,7 @@ delete_part2:
         | HISTORY_SYM delete_single_table opt_delete_system_time
           {
             Lex->last_table()->vers_conditions= Lex->vers_conditions;
+            Lex->pop_select(); //main select
           }
         ;