75 lines
1.7 KiB
Go
75 lines
1.7 KiB
Go
package mysql
|
|
|
|
import (
|
|
"strconv"
|
|
|
|
"source.gleipnir.technology/Gleipnir/jet/internal/jet"
|
|
)
|
|
|
|
// CAST function converts an expr (of any type) into later specified datatype.
|
|
func CAST(expr Expression) *cast {
|
|
return &cast{
|
|
expr: expr,
|
|
}
|
|
}
|
|
|
|
type cast struct {
|
|
expr Expression
|
|
}
|
|
|
|
// AS casts expressions to castType
|
|
func (c *cast) AS(castType string) Expression {
|
|
return jet.AtomicCustomExpression(Token("CAST("), c.expr, Token("AS "+castType+")"))
|
|
}
|
|
|
|
// AS_DATETIME cast expression to DATETIME type
|
|
func (c *cast) AS_DATETIME() DateTimeExpression {
|
|
return DateTimeExp(c.AS("DATETIME"))
|
|
}
|
|
|
|
// AS_SIGNED casts expression to SIGNED type
|
|
func (c *cast) AS_SIGNED() IntegerExpression {
|
|
return IntExp(c.AS("SIGNED"))
|
|
}
|
|
|
|
// AS_UNSIGNED casts expression to UNSIGNED type
|
|
func (c *cast) AS_UNSIGNED() IntegerExpression {
|
|
return IntExp(c.AS("UNSIGNED"))
|
|
}
|
|
|
|
// AS_CHAR casts expression to CHAR type with optional length
|
|
func (c *cast) AS_CHAR(length ...int) StringExpression {
|
|
if len(length) > 0 {
|
|
return StringExp(c.AS("CHAR(" + strconv.Itoa(length[0]) + ")"))
|
|
}
|
|
|
|
return StringExp(c.AS("CHAR"))
|
|
}
|
|
|
|
// AS_DATE casts expression AS DATE type
|
|
func (c *cast) AS_DATE() DateExpression {
|
|
return DateExp(c.AS("DATE"))
|
|
}
|
|
|
|
func (c *cast) AS_FLOAT() FloatExpression {
|
|
return FloatExp(c.AS("FLOAT"))
|
|
}
|
|
|
|
func (c *cast) AS_DOUBLE() FloatExpression {
|
|
return FloatExp(c.AS("DOUBLE"))
|
|
}
|
|
|
|
// AS_DECIMAL casts expression AS DECIMAL type
|
|
func (c *cast) AS_DECIMAL() FloatExpression {
|
|
return FloatExp(c.AS("DECIMAL"))
|
|
}
|
|
|
|
// AS_TIME casts expression AS TIME type
|
|
func (c *cast) AS_TIME() TimeExpression {
|
|
return TimeExp(c.AS("TIME"))
|
|
}
|
|
|
|
// AS_BINARY casts expression as BINARY type
|
|
func (c *cast) AS_BINARY() BlobExpression {
|
|
return BlobExp(c.AS("BINARY"))
|
|
}
|