// AsInterface converts the ValExpr to an interface. It converts
// ValTuple to []interface{}, ValArg to string, StrVal to sqltypes.String,
// NumVal to sqltypes.Numeric, NullVal to nil.
// Otherwise, it returns an error.
func AsInterface(node ValExpr) (interface{}, error) {
switch node := node.(type) {
case ValTuple:
vals := make([]interface{}, 0, len(node))
for _, val := range node {
v, err := AsInterface(val)
if err != nil {
return nil, err
}
vals = append(vals, v)
}
return vals, nil
case ValArg:
return hack.String(node), nil
case ListArg:
return hack.String(node), nil
case StrVal:
return sqltypes.MakeString(node), nil
case NumVal:
n, err := sqltypes.BuildNumeric(hack.String(node))
if err != nil {
return nil, fmt.Errorf("type mismatch: %s", err)
}
return n, nil
case *NullVal:
return nil, nil
}
return nil, fmt.Errorf("unexpected node %v", node)
}
func (node StrVal) Format(buf *TrackedBuffer) {
s := sqltypes.MakeString([]byte(node))
s.EncodeSql(buf)
}