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42 lines
1.2 KiB
42 lines
1.2 KiB
package sqlingo
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func function(name string, args ...interface{}) expression {
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return expression{builder: func(scope scope) (string, error) {
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valuesSql, err := commaValues(scope, args)
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if err != nil {
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return "", err
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}
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return name + "(" + valuesSql + ")", nil
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}}
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}
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// Function creates an expression of the call to specified function.
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func Function(name string, args ...interface{}) Expression {
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return function(name, args...)
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}
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// Concat creates an expression of CONCAT function.
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func Concat(args ...interface{}) StringExpression {
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return function("CONCAT", args...)
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}
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// Count creates an expression of COUNT aggregator.
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func Count(arg interface{}) NumberExpression {
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return function("COUNT", arg)
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}
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// If creates an expression of IF function.
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func If(predicate Expression, trueValue interface{}, falseValue interface{}) (result UnknownExpression) {
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return function("IF", predicate, trueValue, falseValue)
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}
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// Length creates an expression of LENGTH function.
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func Length(arg interface{}) NumberExpression {
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return function("LENGTH", arg)
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}
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// Sum creates an expression of SUM aggregator.
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func Sum(arg interface{}) NumberExpression {
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return function("SUM", arg)
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}
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