sessionctx: add warning for system variable `tidb_enable_parallel_has…

…hagg_spill` (#53917) close #53919
pingcap · Jun 12, 2024 · 8d28b23 · 8d28b23
1 parent 64f5427
commit 8d28b23
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/pkg/sessionctx/variable/sysvar.go b/pkg/sessionctx/variable/sysvar.go
@@ -2381,6 +2381,9 @@ var defaultSysVars = []*SysVar{
 	{Scope: ScopeGlobal | ScopeSession, Name: TiDBEnableParallelHashaggSpill, Value: BoolToOnOff(DefTiDBEnableParallelHashaggSpill), Type: TypeBool,
 		SetSession: func(vars *SessionVars, s string) error {
 			vars.EnableParallelHashaggSpill = TiDBOptOn(s)
+			if !vars.EnableParallelHashaggSpill {
+				vars.StmtCtx.AppendWarning(ErrWarnDeprecatedSyntaxSimpleMsg.FastGen("tidb_enable_parallel_hashagg_spill will be removed in the future and hash aggregate spill will be enabled by default."))
+			}
 			return nil
 		},
 	},