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column.go
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/
column.go
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package sqlbuilder
type BasicColumn struct {
schema AsNamed
table AsNamed
name string
}
func BareColumn(name string) *BasicColumn {
return &BasicColumn{name: name}
}
func (c *BasicColumn) AsNamedShort(s *Serializer) {
s.N(c.name)
}
func (c *BasicColumn) AsExpr(s *Serializer) {
if c.table != nil {
if c.schema != nil {
s.F(c.schema.AsNamed).D(".")
}
s.F(c.table.AsNamed).D(".")
}
s.N(c.name)
}
func (c *BasicColumn) As(alias string) *ColumnAlias {
return AliasColumn(c, alias)
}
type ColumnAlias struct {
expr AsExpr
alias string
}
func AliasColumn(expr AsExpr, alias string) *ColumnAlias {
return &ColumnAlias{expr: expr, alias: alias}
}
func (e *ColumnAlias) As(alias string) *ColumnAlias {
return &ColumnAlias{expr: e.expr, alias: alias}
}
func (e *ColumnAlias) AsExpr(s *Serializer) {
if e.alias != "" {
s.N(e.alias)
} else {
s.F(e.expr.AsExpr)
}
}
func (e *ColumnAlias) AsResultColumn(s *Serializer) {
s.F(e.expr.AsExpr)
if e.alias != "" {
s.D(" AS ").N(e.alias)
}
}