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80 lines
1.2 KiB
Go
80 lines
1.2 KiB
Go
package sqlbuilder
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import (
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"bytes"
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)
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type Clause interface {
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SerializeSql(out *bytes.Buffer) error
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}
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// A clause that can be used in order by
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type OrderByClause interface {
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Clause
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isOrderByClauseInterface
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}
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// An expression
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type Expression interface {
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Clause
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isExpressionInterface
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}
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type BoolExpression interface {
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Clause
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isBoolExpressionInterface
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}
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// A clause that is selectable.
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type Projection interface {
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Clause
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isProjectionInterface
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SerializeSqlForColumnList(out *bytes.Buffer) error
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}
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//
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// Boiler plates ...
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//
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type isOrderByClauseInterface interface {
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isOrderByClauseType()
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}
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type isOrderByClause struct {
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}
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func (o *isOrderByClause) isOrderByClauseType() {
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}
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type isExpressionInterface interface {
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isExpressionType()
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}
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type isExpression struct {
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isOrderByClause // can always use expression in order by.
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}
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func (e *isExpression) isExpressionType() {
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}
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type isBoolExpressionInterface interface {
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isExpressionInterface
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isBoolExpressionType()
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}
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type isBoolExpression struct {
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}
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func (e *isBoolExpression) isBoolExpressionType() {
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}
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type isProjectionInterface interface {
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isProjectionType()
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}
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type isProjection struct {
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}
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func (p *isProjection) isProjectionType() {
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}
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