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Aggregate functions

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This commit is contained in:
zer0sub 2019-06-03 18:28:16 +02:00
parent dca028295d
commit d69c67569a
5 changed files with 159 additions and 59 deletions
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57
sqlbuilder/func_expression.go
View file

@ -10,10 +10,6 @@ type funcExpressionImpl struct {
noBrackets bool
}
func ROW(expressions ...expression) expression {
return newFunc("ROW", expressions, nil)
}
func newFunc(name string, expressions []expression, parent expression) *funcExpressionImpl {
funcExp := &funcExpressionImpl{
name: name,
@ -53,6 +49,9 @@ func (f *funcExpressionImpl) serialize(statement statementType, out *queryData,
return nil
}
func ROW(expressions ...expression) expression {
return newFunc("ROW", expressions, nil)
}
type boolFunc struct {
funcExpressionImpl
@ -240,7 +239,39 @@ func LOG(floatExpression FloatExpression) FloatExpression {
return newFloatFunc("LOG", floatExpression)
}
// ----------------- Group function operators -------------------//
// ----------------- Aggregate functions -------------------//
func AVGf(floatExpression FloatExpression) FloatExpression {
return newFloatFunc("AVG", floatExpression)
}
func AVGi(integerExpression IntegerExpression) FloatExpression {
return newFloatFunc("AVG", integerExpression)
}
func BIT_AND(integerExpression IntegerExpression) IntegerExpression {
return newIntegerFunc("BIT_AND", integerExpression)
}
func BIT_OR(integerExpression IntegerExpression) IntegerExpression {
return newIntegerFunc("BIT_OR", integerExpression)
}
func BOOL_AND(boolExpression BoolExpression) BoolExpression {
return newBoolFunc("BOOL_AND", boolExpression)
}
func BOOL_OR(boolExpression BoolExpression) BoolExpression {
return newBoolFunc("BOOL_OR", boolExpression)
}
func COUNT(expression expression) IntegerExpression {
return newIntegerFunc("COUNT", expression)
}
func EVERY(boolExpression BoolExpression) BoolExpression {
return newBoolFunc("EVERY", boolExpression)
}
func MAXf(floatExpression FloatExpression) FloatExpression {
return newFloatFunc("MAX", floatExpression)
@ -250,6 +281,14 @@ func MAXi(integerExpression IntegerExpression) IntegerExpression {
return newIntegerFunc("MAX", integerExpression)
}
func MINf(floatExpression FloatExpression) FloatExpression {
return newFloatFunc("MIN", floatExpression)
}
func MINi(integerExpression IntegerExpression) IntegerExpression {
return newIntegerFunc("MIN", integerExpression)
}
func SUMf(floatExpression FloatExpression) FloatExpression {
return newFloatFunc("SUM", floatExpression)
}
@ -258,14 +297,6 @@ func SUMi(integerExpression IntegerExpression) IntegerExpression {
return newIntegerFunc("SUM", integerExpression)
}
func COUNTf(floatExpression FloatExpression) FloatExpression {
return newFloatFunc("COUNT", floatExpression)
}
func COUNTi(integerExpression IntegerExpression) IntegerExpression {
return newIntegerFunc("COUNT", integerExpression)
}
//------------ String functions ------------------//
func BIT_LENGTH(stringExpression StringExpression) IntegerExpression {

106
sqlbuilder/func_expression_test.go
View file

@ -5,6 +5,76 @@ import (
"testing"
)
func TestFuncAVG(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, AVGf(table1ColFloat), "AVG(table1.colFloat)")
})
t.Run("integer", func(t *testing.T) {
assertExpressionSerialize(t, AVGi(table1ColInt), "AVG(table1.colInt)")
})
}
func TestFuncBIT_AND(t *testing.T) {
assertExpressionSerialize(t, BIT_AND(table1ColInt), "BIT_AND(table1.colInt)")
}
func TestFuncBIT_OR(t *testing.T) {
assertExpressionSerialize(t, BIT_OR(table1ColInt), "BIT_OR(table1.colInt)")
}
func TestFuncBOOL_AND(t *testing.T) {
assertExpressionSerialize(t, BOOL_AND(table1ColBool), "BOOL_AND(table1.colBool)")
}
func TestFuncBOOL_OR(t *testing.T) {
assertExpressionSerialize(t, BOOL_OR(table1ColBool), "BOOL_OR(table1.colBool)")
}
func TestFuncEVERY(t *testing.T) {
assertExpressionSerialize(t, EVERY(table1ColBool), "EVERY(table1.colBool)")
}
func TestFuncMIN(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, MINf(table1ColFloat), "MIN(table1.colFloat)")
})
t.Run("integer", func(t *testing.T) {
assertExpressionSerialize(t, MINi(table1ColInt), "MIN(table1.colInt)")
})
}
func TestFuncMAX(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, MAXf(table1ColFloat), "MAX(table1.colFloat)")
assertExpressionSerialize(t, MAXf(Float(11.2222)), "MAX($1)", float64(11.2222))
})
t.Run("integer", func(t *testing.T) {
assertExpressionSerialize(t, MAXi(table1ColInt), "MAX(table1.colInt)")
assertExpressionSerialize(t, MAXi(Int(11)), "MAX($1)", int64(11))
})
}
func TestFuncSUM(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, SUMf(table1ColFloat), "SUM(table1.colFloat)")
assertExpressionSerialize(t, SUMf(Float(11.2222)), "SUM($1)", float64(11.2222))
})
t.Run("integer", func(t *testing.T) {
assertExpressionSerialize(t, SUMi(table1ColInt), "SUM(table1.colInt)")
assertExpressionSerialize(t, SUMi(Int(11)), "SUM($1)", int64(11))
})
}
func TestFuncCOUNT(t *testing.T) {
assertExpressionSerialize(t, COUNT(STAR), "COUNT(*)")
assertExpressionSerialize(t, COUNT(table1ColFloat), "COUNT(table1.colFloat)")
assertExpressionSerialize(t, COUNT(Float(11.2222)), "COUNT($1)", float64(11.2222))
}
func TestFuncABS(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, ABSf(table1ColFloat), "ABS(table1.colFloat)")
@ -41,42 +111,6 @@ func TestFuncCBRT(t *testing.T) {
})
}
func TestFuncMAX(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, MAXf(table1ColFloat), "MAX(table1.colFloat)")
assertExpressionSerialize(t, MAXf(Float(11.2222)), "MAX($1)", float64(11.2222))
})
t.Run("integer", func(t *testing.T) {
assertExpressionSerialize(t, MAXi(table1ColInt), "MAX(table1.colInt)")
assertExpressionSerialize(t, MAXi(Int(11)), "MAX($1)", int64(11))
})
}
func TestFuncSUM(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, SUMf(table1ColFloat), "SUM(table1.colFloat)")
assertExpressionSerialize(t, SUMf(Float(11.2222)), "SUM($1)", float64(11.2222))
})
t.Run("integer", func(t *testing.T) {
assertExpressionSerialize(t, SUMi(table1ColInt), "SUM(table1.colInt)")
assertExpressionSerialize(t, SUMi(Int(11)), "SUM($1)", int64(11))
})
}
func TestFuncCOUNT(t *testing.T) {
t.Run("float", func(t *testing.T) {
assertExpressionSerialize(t, COUNTf(table1ColFloat), "COUNT(table1.colFloat)")
assertExpressionSerialize(t, COUNTf(Float(11.2222)), "COUNT($1)", float64(11.2222))
})
t.Run("integer", func(t *testing.T) {
assertExpressionSerialize(t, COUNTi(table1ColInt), "COUNT(table1.colInt)")
assertExpressionSerialize(t, COUNTi(Int(11)), "COUNT($1)", int64(11))
})
}
func TestFuncCEIL(t *testing.T) {
assertExpressionSerialize(t, CEIL(table1ColFloat), "CEIL(table1.colFloat)")
assertExpressionSerialize(t, CEIL(Float(11.2222)), "CEIL($1)", float64(11.2222))

3
sqlbuilder/keyword.go
View file

@ -5,7 +5,8 @@ const (
)
var (
NULL = newNullExpression()
NULL = newNullLiteral()
STAR = newStarLiteral()
)
type keywordClause string

26
sqlbuilder/literal_expression.go
View file

@ -177,19 +177,37 @@ func Date(year, month, day int) DateExpression {
}
//--------------------------------------------------//
type nullExpression struct {
type nullLiteral struct {
expressionInterfaceImpl
}
func newNullExpression() expression {
nullExpression := &nullExpression{}
func newNullLiteral() expression {
nullExpression := &nullLiteral{}
nullExpression.expressionInterfaceImpl.parent = nullExpression
return nullExpression
}
func (n *nullExpression) serialize(statement statementType, out *queryData, options ...serializeOption) error {
func (n *nullLiteral) serialize(statement statementType, out *queryData, options ...serializeOption) error {
out.writeString("NULL")
return nil
}
//--------------------------------------------------//
type starLiteral struct {
expressionInterfaceImpl
}
func newStarLiteral() expression {
starExpression := &starLiteral{}
starExpression.expressionInterfaceImpl.parent = starExpression
return starExpression
}
func (n *starLiteral) serialize(statement statementType, out *queryData, options ...serializeOption) error {
out.writeString("*")
return nil
}