64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
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package jet
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import "errors"
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// SelectTable is interface for SELECT sub-queries
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type SelectTable interface {
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ReadableTable
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Alias() string
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AllColumns() ProjectionList
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}
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type selectTableImpl struct {
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readableTableInterfaceImpl
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selectStmt SelectStatement
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alias string
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projections []projection
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}
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func newSelectTable(selectStmt SelectStatement, alias string) SelectTable {
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expTable := &selectTableImpl{selectStmt: selectStmt, alias: alias}
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expTable.readableTableInterfaceImpl.parent = expTable
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for _, projection := range selectStmt.projections() {
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newProjection := projection.from(expTable)
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expTable.projections = append(expTable.projections, newProjection)
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}
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return expTable
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}
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func (s *selectTableImpl) Alias() string {
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return s.alias
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}
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func (s *selectTableImpl) columns() []column {
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return nil
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}
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func (s *selectTableImpl) AllColumns() ProjectionList {
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return s.projections
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}
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func (s *selectTableImpl) serialize(statement statementType, out *sqlBuilder, options ...serializeOption) error {
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if s == nil {
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return errors.New("jet: Expression table is nil. ")
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}
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err := s.selectStmt.serialize(statement, out)
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if err != nil {
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return err
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}
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out.writeString("AS")
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out.writeIdentifier(s.alias)
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return nil
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}
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