Fix handling of zero values for DyNumber (#1792)

Co-authored-by: telyatnichenk <[email protected]>

Author: gelycot

internal/value/value.go

@@ -2973,7 +2973,7 @@ func zeroPrimitiveValue(t types.Primitive) Value {
 		return JSONDocumentValue("")
 
 	case types.DyNumber:
-		return DyNumberValue("")
+		return DyNumberValue("0")
 
 	case types.TzDate:
 		return TzDateValue("")

internal/value/value_test.go

@@ -501,6 +501,10 @@ func TestValueYql(t *testing.T) {
 			value:   ZeroValue(types.UUID),
 			literal: `Uuid("00000000-0000-0000-0000-000000000000")`,
 		},
+		{
+			value:   ZeroValue(types.DyNumber),
+			literal: `DyNumber("0")`,
+		},
 		{
 			value:   DecimalValueFromBigInt(big.NewInt(-1234567890123456), 22, 9),
 			literal: `Decimal("-1234567.890123456",22,9)`,