Function MakeCollatedString

postgres/parser/types/types.go:807–814

MakeCollatedString constructs a new instance of a CollatedStringFamily type that is collated according to the given locale. The new type is based upon the given string type, having the same oid and width values. For example: STRING => STRING COLLATE EN VARCHAR(20) => VARCHAR(20) COLLATE EN

(strType *T, locale string)

//	STRING      => STRING COLLATE EN
//	VARCHAR(20) => VARCHAR(20) COLLATE EN
func MakeCollatedString(strType *T, locale string) *T {
	switch strType.Oid() {
	case oid.T_text, oid.T_varchar, oid.T_bpchar, oid.T_char, oid.T_name:
		return &T{InternalType: InternalType{
			Family: CollatedStringFamily, Oid: strType.Oid(), Width: strType.Width(), Locale: &locale}}
	}
	panic(errors.AssertionFailedf("cannot apply collation to non-string type: %s", strType))
}

// MakeDecimal constructs a new instance of a DECIMAL type (oid = T_numeric)
// that has at most "precision" # of decimal digits (0 = unspecified number of