Function processCollationOnType

pkg/sql/sem/tree/create.go:260–277

(name Name, typ *types.T, c ColumnCollation)

}

func processCollationOnType(name Name, typ *types.T, c ColumnCollation) (*types.T, error) {
	switch typ.Family() {
	case types.StringFamily:
		return types.MakeCollatedString(typ, string(c)), nil
	case types.CollatedStringFamily:
		return nil, pgerror.Newf(pgcode.Syntax,
			"multiple COLLATE declarations for column %q", name)
	case types.ArrayFamily:
		elemTyp, err := processCollationOnType(name, typ.ArrayContents(), c)
		if err != nil {
			return nil, err
		}
		return types.MakeArray(elemTyp), nil
	default:
		return nil, pgerror.Newf(pgcode.DatatypeMismatch,
			"COLLATE declaration for non-string-typed column %q", name)
	}
}

// NewColumnTableDef constructs a column definition for a CreateTable statement.
func NewColumnTableDef(