549 lines
14 KiB
Go
549 lines
14 KiB
Go
package jet
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import "errors"
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type funcExpressionImpl struct {
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expressionInterfaceImpl
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name string
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expressions []Expression
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noBrackets bool
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}
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func newFunc(name string, expressions []Expression, parent Expression) *funcExpressionImpl {
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funcExp := &funcExpressionImpl{
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name: name,
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expressions: expressions,
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}
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if parent != nil {
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funcExp.expressionInterfaceImpl.parent = parent
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} else {
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funcExp.expressionInterfaceImpl.parent = funcExp
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}
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return funcExp
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}
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func (f *funcExpressionImpl) serialize(statement statementType, out *queryData, options ...serializeOption) error {
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if f == nil {
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return errors.New("Function expressions is nil. ")
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}
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addBrackets := !f.noBrackets || len(f.expressions) > 0
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if addBrackets {
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out.writeString(f.name + "(")
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} else {
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out.writeString(f.name)
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}
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err := serializeExpressionList(statement, f.expressions, ", ", out)
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if err != nil {
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return err
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}
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if addBrackets {
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out.writeString(")")
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}
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return nil
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}
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type boolFunc struct {
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funcExpressionImpl
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boolInterfaceImpl
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}
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func newBoolFunc(name string, expressions ...Expression) BoolExpression {
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boolFunc := &boolFunc{}
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boolFunc.funcExpressionImpl = *newFunc(name, expressions, boolFunc)
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boolFunc.boolInterfaceImpl.parent = boolFunc
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return boolFunc
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}
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type floatFunc struct {
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funcExpressionImpl
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floatInterfaceImpl
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}
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func newFloatFunc(name string, expressions ...Expression) FloatExpression {
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floatFunc := &floatFunc{}
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floatFunc.funcExpressionImpl = *newFunc(name, expressions, floatFunc)
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floatFunc.floatInterfaceImpl.parent = floatFunc
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return floatFunc
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}
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type integerFunc struct {
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funcExpressionImpl
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integerInterfaceImpl
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}
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func newIntegerFunc(name string, expressions ...Expression) IntegerExpression {
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floatFunc := &integerFunc{}
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floatFunc.funcExpressionImpl = *newFunc(name, expressions, floatFunc)
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floatFunc.integerInterfaceImpl.parent = floatFunc
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return floatFunc
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}
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type stringFunc struct {
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funcExpressionImpl
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stringInterfaceImpl
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}
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func newStringFunc(name string, expressions ...Expression) StringExpression {
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stringFunc := &stringFunc{}
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stringFunc.funcExpressionImpl = *newFunc(name, expressions, stringFunc)
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stringFunc.stringInterfaceImpl.parent = stringFunc
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return stringFunc
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}
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type dateFunc struct {
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funcExpressionImpl
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dateInterfaceImpl
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}
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func newDateFunc(name string, expressions ...Expression) *dateFunc {
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dateFunc := &dateFunc{}
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dateFunc.funcExpressionImpl = *newFunc(name, expressions, dateFunc)
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dateFunc.dateInterfaceImpl.parent = dateFunc
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return dateFunc
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}
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type timeFunc struct {
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funcExpressionImpl
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timeInterfaceImpl
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}
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func newTimeFunc(name string, expressions ...Expression) *timeFunc {
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timeFun := &timeFunc{}
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timeFun.funcExpressionImpl = *newFunc(name, expressions, timeFun)
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timeFun.timeInterfaceImpl.parent = timeFun
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return timeFun
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}
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type timezFunc struct {
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funcExpressionImpl
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timezInterfaceImpl
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}
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func newTimezFunc(name string, expressions ...Expression) *timezFunc {
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timezFun := &timezFunc{}
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timezFun.funcExpressionImpl = *newFunc(name, expressions, timezFun)
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timezFun.timezInterfaceImpl.parent = timezFun
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return timezFun
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}
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type timestampFunc struct {
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funcExpressionImpl
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timestampInterfaceImpl
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}
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func newTimestampFunc(name string, expressions ...Expression) *timestampFunc {
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timestampFunc := ×tampFunc{}
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timestampFunc.funcExpressionImpl = *newFunc(name, expressions, timestampFunc)
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timestampFunc.timestampInterfaceImpl.parent = timestampFunc
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return timestampFunc
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}
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type timestampzFunc struct {
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funcExpressionImpl
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timestampzInterfaceImpl
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}
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func newTimestampzFunc(name string, expressions ...Expression) *timestampzFunc {
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timestampzFunc := ×tampzFunc{}
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timestampzFunc.funcExpressionImpl = *newFunc(name, expressions, timestampzFunc)
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timestampzFunc.timestampzInterfaceImpl.parent = timestampzFunc
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return timestampzFunc
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}
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func ROW(expressions ...Expression) Expression {
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return newFunc("ROW", expressions, nil)
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}
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// ------------------ Mathematical functions ---------------//
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func ABSf(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("ABS", floatExpression)
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}
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func ABSi(integerExpression IntegerExpression) IntegerExpression {
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return newIntegerFunc("ABS", integerExpression)
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}
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func SQRT(numericExpression NumericExpression) FloatExpression {
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return newFloatFunc("SQRT", numericExpression)
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}
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func CBRT(numericExpression NumericExpression) FloatExpression {
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return newFloatFunc("CBRT", numericExpression)
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}
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func CEIL(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("CEIL", floatExpression)
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}
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func FLOOR(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("FLOOR", floatExpression)
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}
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func ROUND(floatExpression FloatExpression, intExpression ...IntegerExpression) FloatExpression {
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if len(intExpression) > 0 {
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return newFloatFunc("ROUND", floatExpression, intExpression[0])
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}
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return newFloatFunc("ROUND", floatExpression)
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}
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func SIGN(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("SIGN", floatExpression)
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}
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func TRUNC(floatExpression FloatExpression, intExpression ...IntegerExpression) FloatExpression {
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if len(intExpression) > 0 {
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return newFloatFunc("TRUNC", floatExpression, intExpression[0])
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}
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return newFloatFunc("TRUNC", floatExpression)
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}
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func LN(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("LN", floatExpression)
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}
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func LOG(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("LOG", floatExpression)
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}
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// ----------------- Aggregate functions -------------------//
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func AVG(numericExpression NumericExpression) FloatExpression {
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return newFloatFunc("AVG", numericExpression)
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}
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func BIT_AND(integerExpression IntegerExpression) IntegerExpression {
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return newIntegerFunc("BIT_AND", integerExpression)
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}
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func BIT_OR(integerExpression IntegerExpression) IntegerExpression {
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return newIntegerFunc("BIT_OR", integerExpression)
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}
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func BOOL_AND(boolExpression BoolExpression) BoolExpression {
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return newBoolFunc("BOOL_AND", boolExpression)
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}
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func BOOL_OR(boolExpression BoolExpression) BoolExpression {
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return newBoolFunc("BOOL_OR", boolExpression)
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}
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func COUNT(expression Expression) IntegerExpression {
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return newIntegerFunc("COUNT", expression)
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}
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func EVERY(boolExpression BoolExpression) BoolExpression {
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return newBoolFunc("EVERY", boolExpression)
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}
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func MAXf(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("MAX", floatExpression)
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}
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func MAXi(integerExpression IntegerExpression) IntegerExpression {
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return newIntegerFunc("MAX", integerExpression)
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}
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func MINf(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("MIN", floatExpression)
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}
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func MINi(integerExpression IntegerExpression) IntegerExpression {
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return newIntegerFunc("MIN", integerExpression)
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}
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func SUMf(floatExpression FloatExpression) FloatExpression {
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return newFloatFunc("SUM", floatExpression)
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}
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func SUMi(integerExpression IntegerExpression) IntegerExpression {
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return newIntegerFunc("SUM", integerExpression)
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}
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//------------ String functions ------------------//
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func BIT_LENGTH(stringExpression StringExpression) IntegerExpression {
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return newIntegerFunc("BIT_LENGTH", stringExpression)
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}
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func CHAR_LENGTH(stringExpression StringExpression) IntegerExpression {
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return newIntegerFunc("CHAR_LENGTH", stringExpression)
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}
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func OCTET_LENGTH(stringExpression StringExpression) IntegerExpression {
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return newIntegerFunc("OCTET_LENGTH", stringExpression)
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}
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func LOWER(stringExpression StringExpression) StringExpression {
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return newStringFunc("LOWER", stringExpression)
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}
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func UPPER(stringExpression StringExpression) StringExpression {
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return newStringFunc("UPPER", stringExpression)
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}
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func BTRIM(stringExpression StringExpression) StringExpression {
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return newStringFunc("BTRIM", stringExpression)
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}
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func LTRIM(str StringExpression, trimChars ...StringExpression) StringExpression {
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if len(trimChars) > 0 {
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return newStringFunc("LTRIM", str, trimChars[0])
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}
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return newStringFunc("LTRIM", str)
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}
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func RTRIM(str StringExpression, trimChars ...StringExpression) StringExpression {
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if len(trimChars) > 0 {
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return newStringFunc("RTRIM", str, trimChars[0])
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}
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return newStringFunc("RTRIM", str)
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}
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func CHR(integerExpression IntegerExpression) StringExpression {
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return newStringFunc("CHR", integerExpression)
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}
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//
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//func CONCAT(expressions ...Expression) StringExpression {
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// return newStringFunc("CONCAT", expressions...)
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//}
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//
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//func CONCAT_WS(expressions ...Expression) StringExpression {
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// return newStringFunc("CONCAT_WS", expressions...)
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//}
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func CONVERT(str StringExpression, fromEncoding StringExpression, toEncoding StringExpression) StringExpression {
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return newStringFunc("CONVERT", str, fromEncoding, toEncoding)
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}
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func CONVERT_FROM(str StringExpression, fromEncoding StringExpression) StringExpression {
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return newStringFunc("CONVERT_FROM", str, fromEncoding)
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}
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func CONVERT_TO(str StringExpression, toEncoding StringExpression) StringExpression {
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return newStringFunc("CONVERT_TO", str, toEncoding)
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}
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func ENCODE(data StringExpression, format StringExpression) StringExpression {
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return newStringFunc("ENCODE", data, format)
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}
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func DECODE(data StringExpression, format StringExpression) StringExpression {
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return newStringFunc("DECODE", data, format)
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}
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//func FORMAT(formatStr StringExpression, formatArgs ...expressions) StringExpression {
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// args := []expressions{formatStr}
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// args = append(args, formatArgs...)
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// return newStringFunc("FORMAT", args...)
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//}
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func INITCAP(str StringExpression) StringExpression {
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return newStringFunc("INITCAP", str)
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}
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func LEFT(str StringExpression, n IntegerExpression) StringExpression {
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return newStringFunc("LEFT", str, n)
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}
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func RIGHT(str StringExpression, n IntegerExpression) StringExpression {
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return newStringFunc("RIGHT", str, n)
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}
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func LENGTH(str StringExpression, encoding ...StringExpression) StringExpression {
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if len(encoding) > 0 {
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return newStringFunc("LENGTH", str, encoding[0])
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}
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return newStringFunc("LENGTH", str)
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}
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func LPAD(str StringExpression, length IntegerExpression, text ...StringExpression) StringExpression {
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if len(text) > 0 {
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return newStringFunc("LPAD", str, length, text[0])
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}
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return newStringFunc("LPAD", str, length)
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}
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func RPAD(str StringExpression, length IntegerExpression, text ...StringExpression) StringExpression {
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if len(text) > 0 {
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return newStringFunc("RPAD", str, length, text[0])
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}
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return newStringFunc("RPAD", str, length)
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}
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func MD5(stringExpression StringExpression) StringExpression {
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return newStringFunc("MD5", stringExpression)
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}
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func REPEAT(str StringExpression, n IntegerExpression) StringExpression {
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return newStringFunc("REPEAT", str, n)
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}
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func REPLACE(text, from, to StringExpression) StringExpression {
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return newStringFunc("REPLACE", text, from, to)
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}
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func REVERSE(stringExpression StringExpression) StringExpression {
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return newStringFunc("REVERSE", stringExpression)
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}
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func STRPOS(str, substring StringExpression) IntegerExpression {
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return newIntegerFunc("STRPOS", str, substring)
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}
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func SUBSTR(str StringExpression, from IntegerExpression, count ...IntegerExpression) StringExpression {
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if len(count) > 0 {
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return newStringFunc("SUBSTR", str, from, count[0])
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}
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return newStringFunc("SUBSTR", str, from)
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}
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func TO_ASCII(str StringExpression, encoding ...StringExpression) StringExpression {
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if len(encoding) > 0 {
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return newStringFunc("TO_ASCII", str, encoding[0])
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}
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return newStringFunc("TO_ASCII", str)
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}
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func TO_HEX(number IntegerExpression) StringExpression {
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return newStringFunc("TO_HEX", number)
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}
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//----------Data Type Formatting Functions ----------------------//
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func TO_CHAR(expression Expression, text StringExpression) StringExpression {
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return newStringFunc("TO_CHAR", expression, text)
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}
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func TO_DATE(dateStr, format StringExpression) DateExpression {
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return newDateFunc("TO_DATE", dateStr, format)
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}
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func TO_NUMBER(floatStr, format StringExpression) FloatExpression {
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return newFloatFunc("TO_NUMBER", floatStr, format)
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}
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func TO_TIMESTAMP(timestampzStr, format StringExpression) TimestampzExpression {
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return newTimestampzFunc("TO_TIMESTAMP", timestampzStr, format)
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}
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//----------------- Date/Time Functions and Operators ---------------//
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func CURRENT_DATE() DateExpression {
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dateFunc := newDateFunc("CURRENT_DATE")
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dateFunc.noBrackets = true
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return dateFunc
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}
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func CURRENT_TIME(precision ...int) TimezExpression {
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var timezFunc *timezFunc
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if len(precision) > 0 {
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timezFunc = newTimezFunc("CURRENT_TIME", constLiteral(precision[0]))
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} else {
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timezFunc = newTimezFunc("CURRENT_TIME")
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}
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timezFunc.noBrackets = true
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return timezFunc
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}
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func CURRENT_TIMESTAMP(precision ...int) TimestampzExpression {
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var timestampzFunc *timestampzFunc
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if len(precision) > 0 {
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timestampzFunc = newTimestampzFunc("CURRENT_TIMESTAMP", constLiteral(precision[0]))
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} else {
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timestampzFunc = newTimestampzFunc("CURRENT_TIMESTAMP")
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}
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timestampzFunc.noBrackets = true
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return timestampzFunc
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}
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func LOCALTIME(precision ...int) TimeExpression {
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var timeFunc *timeFunc
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if len(precision) > 0 {
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timeFunc = newTimeFunc("LOCALTIME", constLiteral(precision[0]))
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} else {
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timeFunc = newTimeFunc("LOCALTIME")
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}
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timeFunc.noBrackets = true
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return timeFunc
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}
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func LOCALTIMESTAMP(precision ...int) TimestampExpression {
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var timestampFunc *timestampFunc
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if len(precision) > 0 {
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timestampFunc = newTimestampFunc("LOCALTIMESTAMP", constLiteral(precision[0]))
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} else {
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timestampFunc = newTimestampFunc("LOCALTIMESTAMP")
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}
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timestampFunc.noBrackets = true
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return timestampFunc
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}
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func NOW() TimestampzExpression {
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return newTimestampzFunc("NOW")
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}
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// --------------- Conditional Expressions Functions -------------//
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func COALESCE(value Expression, values ...Expression) Expression {
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var allValues = []Expression{value}
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allValues = append(allValues, values...)
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return newFunc("COALESCE", allValues, nil)
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}
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func NULLIF(value1, value2 Expression) Expression {
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return newFunc("NULLIF", []Expression{value1, value2}, nil)
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}
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func GREATEST(value Expression, values ...Expression) Expression {
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var allValues = []Expression{value}
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allValues = append(allValues, values...)
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return newFunc("GREATEST", allValues, nil)
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}
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func LEAST(value Expression, values ...Expression) Expression {
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var allValues = []Expression{value}
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allValues = append(allValues, values...)
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return newFunc("LEAST", allValues, nil)
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}
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