51 lines
1 KiB
Go
51 lines
1 KiB
Go
package sqlbuilder
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import "bytes"
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type FuncExpression interface {
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Expression
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}
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type numericFunc struct {
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expressionInterfaceImpl
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numericInterfaceImpl
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name string
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expression Expression
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}
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func NewNumericFunc(name string, expression Expression) NumericExpression {
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numericFunc := &numericFunc{
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name: name,
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expression: expression,
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}
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numericFunc.expressionInterfaceImpl.parent = numericFunc
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numericFunc.numericInterfaceImpl.parent = numericFunc
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return numericFunc
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}
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func (f *numericFunc) SerializeSql(out *bytes.Buffer, options ...serializeOption) 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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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 NumericExpression) NumericExpression {
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return NewNumericFunc("MAX", expression)
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}
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func SUM(expression NumericExpression) NumericExpression {
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return NewNumericFunc("SUM", expression)
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}
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