89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
package mysql
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import (
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"github.com/go-jet/jet/v2/internal/jet"
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"strconv"
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)
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type cast interface {
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// Cast expressions as castType type
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AS(castType string) Expression
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// Cast expression as char with optional length
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AS_CHAR(length ...int) StringExpression
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// Cast expression AS date type
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AS_DATE() DateExpression
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// Cast expression AS numeric type, using precision and optionally scale
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AS_DECIMAL() FloatExpression
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// Cast expression AS time type
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AS_TIME() TimeExpression
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// Cast expression as datetime type
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AS_DATETIME() DateTimeExpression
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// Cast expressions as signed integer type
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AS_SIGNED() IntegerExpression
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// Cast expression as unsigned integer type
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AS_UNSIGNED() IntegerExpression
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// Cast expression as binary type
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AS_BINARY() StringExpression
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}
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type castImpl struct {
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jet.Cast
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}
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// CAST function converts a expr (of any type) into latter specified datatype.
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func CAST(expr Expression) cast {
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castImpl := &castImpl{}
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castImpl.Cast = jet.NewCastImpl(expr)
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return castImpl
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}
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// AS casts expressions to castType
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func (c *castImpl) AS(castType string) Expression {
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return c.Cast.AS(castType)
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}
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// AS_DATETIME cast expression to DATETIME type
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func (c *castImpl) AS_DATETIME() DateTimeExpression {
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return DateTimeExp(c.AS("DATETIME"))
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}
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// AS_SIGNED casts expression to SIGNED type
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func (c *castImpl) AS_SIGNED() IntegerExpression {
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return IntExp(c.AS("SIGNED"))
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}
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// AS_UNSIGNED casts expression to UNSIGNED type
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func (c *castImpl) AS_UNSIGNED() IntegerExpression {
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return IntExp(c.AS("UNSIGNED"))
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}
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// AS_CHAR casts expression to CHAR type with optional length
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func (c *castImpl) AS_CHAR(length ...int) StringExpression {
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if len(length) > 0 {
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return StringExp(c.AS("CHAR(" + strconv.Itoa(length[0]) + ")"))
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}
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return StringExp(c.AS("CHAR"))
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}
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// AS_DATE casts expression AS DATE type
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func (c *castImpl) AS_DATE() DateExpression {
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return DateExp(c.AS("DATE"))
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}
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// AS_DECIMAL casts expression AS DECIMAL type
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func (c *castImpl) AS_DECIMAL() FloatExpression {
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return FloatExp(c.AS("DECIMAL"))
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}
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// AS_TIME casts expression AS TIME type
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func (c *castImpl) AS_TIME() TimeExpression {
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return TimeExp(c.AS("TIME"))
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}
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// AS_BINARY casts expression as BINARY type
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func (c *castImpl) AS_BINARY() StringExpression {
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return StringExp(c.AS("BINARY"))
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}
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