39 lines
736 B
Go
39 lines
736 B
Go
package jet
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type alias struct {
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expression Expression
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alias string
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subQuery ExpressionTable
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}
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func newAlias(expression Expression, aliasName string) projection {
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return &alias{
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expression: expression,
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alias: aliasName,
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}
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}
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func (a *alias) from(subQuery ExpressionTable) projection {
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newAlias := *a
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newAlias.subQuery = subQuery
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return &newAlias
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}
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func (a *alias) serializeForProjection(statement statementType, out *queryData) error {
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if a.subQuery != nil {
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out.writeIdentifier(a.subQuery.Alias())
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out.writeByte('.')
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out.writeQuotedString(a.alias)
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} else {
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err := a.expression.serialize(statement, out)
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if err != nil {
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return err
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}
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}
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out.writeString(`AS "` + a.alias + `"`)
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return nil
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}
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