fix(plan): add POW alias to functionIdRegister

pkg/sql/plan/function/func_binary_test.go

@@ -5146,6 +5146,17 @@ func TestPower(t *testing.T) {
 	}
 }
 
+// TestPowFunctionId validates that "pow" is registered in the functionIdRegister
+// and getFunctionIdByName resolves it to the POW function ID (149).
+// This ensures the fix for issue #24439 is effective: adding "pow": POW
+// to the functionIdRegister map in function_id.go.
+func TestPowFunctionId(t *testing.T) {
+	ctx := context.Background()
+	fnId, err := getFunctionIdByName(ctx, "pow")
+	require.NoError(t, err)
+	require.Equal(t, int32(POW), fnId)
+}
+
 // TRUNCATE
 func initTruncateTestCase() []tcTemp {
 	cases := []struct {

pkg/sql/plan/function/function_id.go

@@ -562,6 +562,7 @@ var functionIdRegister = map[string]int32{
 	"endswith":    ENDSWITH,
 	"findinset":   FINDINSET,
 	"find_in_set": FINDINSET,
+	"pow":         POW,
 	"power":       POW,
 	"startswith":  STARTSWITH,
 	"to_date":     STR_TO_DATE,

test/distributed/cases/function/func_math_power.result

@@ -16,6 +16,15 @@ power(10, 100)
 SELECT power(1,100);
 power(1, 100)
 1.0
+SELECT POW(2, 10);
+pow(2, 10)
+1024.0
+SELECT pow(2, 10);
+pow(2, 10)
+1024.0
+SELECT POW(1.5, 3);
+pow(1.5, 3)
+3.375
 select power(2,-1);
 power(2, -1)
 0.5

test/distributed/cases/function/func_math_power.test

@@ -8,6 +8,11 @@ SELECT power(2,100);
 SELECT power(10,100);
 SELECT power(1,100);
 
+#POW alias (issue 24439)
+SELECT POW(2, 10);
+SELECT pow(2, 10);
+SELECT POW(1.5, 3);
+
 #EXTREME VALUE, 科学计数法
 select power(2,-1);
 select power(-2,1);