57 lines
986 B
Go
57 lines
986 B
Go
package sqlbuilder
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import "bytes"
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type FuncExpression struct {
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isExpression
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isProjection
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name string
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expression Expression
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alias string
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}
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func (f *FuncExpression) As(alias string) Projection {
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newFuncExpression := *f
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newFuncExpression.alias = alias
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return &newFuncExpression
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}
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func (f *FuncExpression) SerializeSql(out *bytes.Buffer) error {
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out.WriteString(f.name)
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out.WriteString("(")
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err := f.expression.SerializeSql(out)
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if err != nil {
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return err
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}
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out.WriteString(")")
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if f.alias != "" {
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out.WriteString(` AS "`)
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out.WriteString(f.alias)
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out.WriteString(`"`)
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}
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return nil
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}
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func (f *FuncExpression) SerializeSqlForColumnList(out *bytes.Buffer) error {
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return f.SerializeSql(out)
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}
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func MAX(expression Expression) *FuncExpression {
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return &FuncExpression{
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name: "MAX",
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expression: expression,
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}
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}
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func SUM(expression Expression) *FuncExpression {
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return &FuncExpression{
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name: "SUM",
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expression: expression,
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}
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}
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