Parser: default SYSTEM_TIME ALL for DELETE HISTORY

mysql-test/suite/versioning/r/truncate.result

@@ -7,7 +7,7 @@ update t set a=2;
 set @test = 'correct';
 create trigger trg_before before delete on t for each row set @test = 'incorrect';
 create trigger trg_after after delete on t for each row set @test = 'incorrect';
-delete history from t before system_time now(6);
+delete history from t;
 select @test from t;
 @test
 correct
@@ -29,7 +29,7 @@ a
 11
 22
 2
-prepare stmt from 'delete history from t before system_time timestamp now(6)';
+prepare stmt from 'delete history from t';
 execute stmt;
 drop prepare stmt;
 select * from t for system_time all;
@@ -52,20 +52,20 @@ engine myisam
 partition by system_time (
 partition p0 history,
 partition pn current);
-delete history from t before system_time current_timestamp;
+delete history from t;
 ERROR 42000: The used command is not allowed with this MariaDB version
 create or replace table t (i int) with system versioning;
-delete history from t before system_time now();
+delete history from t;
 create or replace view v as select * from t;
-delete history from v before system_time now();
+delete history from v;
 ERROR HY000: DELETE HISTORY from VIEW is prohibited
 create or replace table t (i int);
-delete history from t before system_time now();
+delete history from t;
 ERROR HY000: Table `t` is not system-versioned
 create or replace view v as select * from t;
-delete history from v before system_time now();
+delete history from v;
 ERROR HY000: DELETE HISTORY from VIEW is prohibited
-prepare stmt from 'delete history from t before system_time now()';
+prepare stmt from 'delete history from t';
 ERROR HY000: Table `t` is not system-versioned
 drop table t;
 drop view v;

mysql-test/suite/versioning/t/truncate.test

@@ -11,7 +11,7 @@ update t set a=2;
 set @test = 'correct';
 create trigger trg_before before delete on t for each row set @test = 'incorrect';
 create trigger trg_after after delete on t for each row set @test = 'incorrect';
-delete history from t before system_time now(6);
+delete history from t;
 select @test from t;
 drop table t;
 
@@ -25,7 +25,7 @@ update t set a=22 where a=2;
 select * from t for system_time all;
 delete history from t before system_time timestamp @ts1;
 select * from t for system_time all;
-prepare stmt from 'delete history from t before system_time timestamp now(6)';
+prepare stmt from 'delete history from t';
 execute stmt; drop prepare stmt;
 select * from t for system_time all;
 delete from t;
@@ -51,22 +51,22 @@ partition by system_time (
     partition pn current);
 
 --error ER_NOT_ALLOWED_COMMAND
-delete history from t before system_time current_timestamp;
+delete history from t;
 
 create or replace table t (i int) with system versioning;
-delete history from t before system_time now();
+delete history from t;
 create or replace view v as select * from t;
 --error ER_VERS_TRUNCATE_VIEW
-delete history from v before system_time now();
+delete history from v;
 
 create or replace table t (i int);
 --error ER_VERS_NOT_VERSIONED
-delete history from t before system_time now();
+delete history from t;
 create or replace view v as select * from t;
 --error ER_VERS_TRUNCATE_VIEW
-delete history from v before system_time now();
+delete history from v;
 --error ER_VERS_NOT_VERSIONED
-prepare stmt from 'delete history from t before system_time now()';
+prepare stmt from 'delete history from t';
 
 drop table t;
 drop view v;

sql/sql_yacc.yy

@@ -13406,12 +13406,21 @@ delete:
           delete_part2
           ;
 
+opt_delete_system_time:
+            /* empty */
+          {
+            Lex->vers_conditions.init(SYSTEM_TIME_ALL);
+          }
+          | BEFORE_SYM SYSTEM_TIME_SYM opt_trans_or_timestamp simple_expr
+          {
+            Lex->vers_conditions.init(SYSTEM_TIME_BEFORE, $3, $4);
+          }
+          ;
+
 delete_part2:
           opt_delete_options single_multi {}
-        | HISTORY_SYM delete_single_table
-          BEFORE_SYM SYSTEM_TIME_SYM opt_trans_or_timestamp simple_expr
+        | HISTORY_SYM delete_single_table opt_delete_system_time
           {
-            Lex->vers_conditions.init(SYSTEM_TIME_BEFORE, $5, $6);
             Lex->last_table()->vers_conditions= Lex->vers_conditions;
           }
         ;