Gleipnir/jet
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CAST refactor.

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This commit is contained in:
go-jet 2019-07-07 12:19:05 +02:00
parent cd1d033ffb
commit db43f471ec
11 changed files with 187 additions and 308 deletions
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92
expression.go
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@ -2,7 +2,6 @@ package jet
import (
"errors"
"fmt"
)
// Common expression interface
@ -29,35 +28,6 @@ type Expression interface {
ASC() OrderByClause
// Expression will be used to sort query result in ascending order
DESC() OrderByClause
// Cast expression to dbType
TO(dbType string) Expression
// Cast expression to bool type
TO_BOOL() BoolExpression
// Cast expression to smallint type
TO_SMALLINT() IntegerExpression
// Cast expression to integer type
TO_INTEGER() IntegerExpression
// Cast expression to bigint type
TO_BIGINT() IntegerExpression
// Cast expression to numeric type, using precision and optionally scale
TO_NUMERIC(precision int, scale ...int) FloatExpression
// Cast expression to real type
TO_REAL() FloatExpression
// Cast expression to double precision type
TO_DOUBLE() FloatExpression
// Cast expression to text type
TO_TEXT() StringExpression
// Cast expression to date type
TO_DATE() DateExpression
// Cast expression to time type
TO_TIME() TimeExpression
// Cast expression to time with time timezone type
TO_TIMEZ() TimezExpression
// Cast expression to timestamp type
TO_TIMESTAMP() TimestampExpression
// Cast expression to timestamp with timezone type
TO_TIMESTAMPZ() TimestampzExpression
}
type expressionInterfaceImpl struct {
@ -96,68 +66,6 @@ func (e *expressionInterfaceImpl) DESC() OrderByClause {
return newOrderByClause(e.parent, false)
}
func (e *expressionInterfaceImpl) TO(dbType string) Expression {
return newCast(e.parent, dbType)
}
func (e *expressionInterfaceImpl) TO_BOOL() BoolExpression {
return newBoolCast(e.parent)
}
func (e *expressionInterfaceImpl) TO_SMALLINT() IntegerExpression {
return newIntegerCast(e.parent, "smallint")
}
func (e *expressionInterfaceImpl) TO_INTEGER() IntegerExpression {
return newIntegerCast(e.parent, "integer")
}
func (e *expressionInterfaceImpl) TO_BIGINT() IntegerExpression {
return newIntegerCast(e.parent, "bigint")
}
func (e *expressionInterfaceImpl) TO_NUMERIC(precision int, scale ...int) FloatExpression {
var castType string
if len(scale) > 0 {
castType = fmt.Sprintf("numeric(%d, %d)", precision, scale[0])
} else {
castType = fmt.Sprintf("numeric(%d)", precision)
}
return newFloatCast(e.parent, castType)
}
func (e *expressionInterfaceImpl) TO_REAL() FloatExpression {
return newFloatCast(e.parent, "real")
}
func (e *expressionInterfaceImpl) TO_DOUBLE() FloatExpression {
return newFloatCast(e.parent, "double precision")
}
func (e *expressionInterfaceImpl) TO_TEXT() StringExpression {
return newTextCast(e.parent)
}
func (e *expressionInterfaceImpl) TO_DATE() DateExpression {
return newDateCast(e.parent)
}
func (e *expressionInterfaceImpl) TO_TIME() TimeExpression {
return newTimeCast(e.parent)
}
func (e *expressionInterfaceImpl) TO_TIMEZ() TimezExpression {
return newTimezCast(e.parent)
}
func (e *expressionInterfaceImpl) TO_TIMESTAMP() TimestampExpression {
return newTimestampCast(e.parent)
}
func (e *expressionInterfaceImpl) TO_TIMESTAMPZ() TimestampzExpression {
return newTimestampzCast(e.parent)
}
func (e *expressionInterfaceImpl) serializeForGroupBy(statement statementType, out *queryData) error {
return e.parent.serialize(statement, out, noWrap)
}