func pgTypeForParserType(t parser.Type) pgType {
size := -1
if s, variable := t.Size(); !variable {
size = int(s)
}
return pgType{
oid: t.Oid(),
size: size,
}
}
// SanitizeVarFreeExpr verifies a default expression is valid, has the
// correct type and contains no variable expressions.
func SanitizeVarFreeExpr(expr parser.Expr, expectedType parser.Type, context string) error {
if parser.ContainsVars(expr) {
return exprContainsVarsError(context, expr)
}
typedExpr, err := parser.TypeCheck(expr, nil, expectedType)
if err != nil {
return err
}
if defaultType := typedExpr.ResolvedType(); !expectedType.Equal(defaultType) {
return incompatibleExprTypeError(context, expectedType, defaultType)
}
return nil
}
// GenerateRandomArg generates a random, valid, SQL function argument of
// the spcified type.
func (r *RSG) GenerateRandomArg(typ parser.Type) string {
if r.Intn(10) == 0 {
return "NULL"
}
var v interface{}
switch typ {
case parser.TypeInt:
i := r.Int63()
i -= r.Int63()
v = i
case parser.TypeFloat, parser.TypeDecimal:
v = r.Float64()
case parser.TypeString:
v = `'string'`
case parser.TypeBytes:
v = `b'bytes'`
case parser.TypeTimestamp, parser.TypeTimestampTZ:
t := time.Unix(0, r.Int63())
v = fmt.Sprintf(`'%s'`, t.Format(time.RFC3339Nano))
case parser.TypeBool:
if r.Intn(2) == 0 {
v = "false"
} else {
v = "true"
}
case parser.TypeDate:
i := r.Int63()
i -= r.Int63()
d := parser.NewDDate(parser.DDate(i))
v = fmt.Sprintf(`'%s'`, d)
case parser.TypeInterval:
d := duration.Duration{Nanos: r.Int63()}
v = fmt.Sprintf(`'%s'`, &parser.DInterval{Duration: d})
case parser.TypeIntArray,
parser.TypeStringArray,
parser.TypeAnyArray,
parser.TypeAny:
v = "NULL"
default:
switch typ.(type) {
case parser.TTuple:
v = "NULL"
default:
panic(fmt.Errorf("unknown arg type: %s (%T)", typ, typ))
}
}
return fmt.Sprintf("%v::%s", v, typ.String())
}
// CheckColumnType verifies that a given value is compatible
// with the type requested by the column. If the value is a
// placeholder, the type of the placeholder gets populated.
func CheckColumnType(col ColumnDescriptor, typ parser.Type, pmap *parser.PlaceholderInfo) error {
if typ == parser.TypeNull {
return nil
}
var set parser.Type
switch col.Type.Kind {
case ColumnType_BOOL:
set = parser.TypeBool
case ColumnType_INT:
set = parser.TypeInt
case ColumnType_FLOAT:
set = parser.TypeFloat
case ColumnType_DECIMAL:
set = parser.TypeDecimal
case ColumnType_STRING:
set = parser.TypeString
case ColumnType_BYTES:
set = parser.TypeBytes
case ColumnType_DATE:
set = parser.TypeDate
case ColumnType_TIMESTAMP:
set = parser.TypeTimestamp
case ColumnType_TIMESTAMPTZ:
set = parser.TypeTimestampTZ
case ColumnType_INTERVAL:
set = parser.TypeInterval
default:
return errors.Errorf("unsupported column type: %s", col.Type.Kind)
}
// If the value is a placeholder, then the column check above has
// populated 'set' with a type to assign to it.
if p, pok := typ.(parser.TPlaceholder); pok {
if err := pmap.SetType(p.Name, set); err != nil {
return fmt.Errorf("cannot infer type for placeholder %s from column %q: %s",
p.Name, col.Name, err)
}
} else if !(typ.Equal(set) || (set == parser.TypeBytes && typ == parser.TypeString)) {
// Not a placeholder; check that the value cast has succeeded.
return fmt.Errorf("value type %s doesn't match type %s of column %q",
typ, col.Type.Kind, col.Name)
}
return nil
}
func typByVal(typ parser.Type) parser.Datum {
_, variable := typ.Size()
return parser.MakeDBool(parser.DBool(!variable))
}
func typLen(typ parser.Type) *parser.DInt {
if sz, variable := typ.Size(); !variable {
return parser.NewDInt(parser.DInt(sz))
}
return negOneVal
}
