Function columnTypeHints

backend/loaddata.go:240–271

(b *strings.Builder, dst sql.Table, schema sql.Schema, colNames []string)

}

func columnTypeHints(b *strings.Builder, dst sql.Table, schema sql.Schema, colNames []string) error {
	b.WriteString("{")

	if len(colNames) == 0 {
		for i, col := range schema {
			if i > 0 {
				b.WriteString(", ")
			}
			if err := columnTypeHint(b, col); err != nil {
				return err
			}
		}
		b.WriteString("}")
		return nil
	}

	for i, col := range colNames {
		if i > 0 {
			b.WriteString(", ")
		}
		idx := schema.IndexOf(col, dst.Name()) // O(n^2) but n := # of columns is usually small
		if idx < 0 {
			return sql.ErrTableColumnNotFound.New(dst.Name(), col)
		}
		if err := columnTypeHint(b, schema[idx]); err != nil {
			return err
		}
	}

	b.WriteString("}")
	return nil
}

func columnTypeHint(b *strings.Builder, col *sql.Column) error {
	b.WriteString(catalog.QuoteIdentifierANSI(col.Name))