func NewWhere(where expr.Node, stmt *expr.SqlSelect) *Where {
s := &Where{
TaskBase: NewTaskBase("Where"),
where: where,
}
cols := make(map[string]*expr.Column)
if len(stmt.From) == 1 {
cols = stmt.UnAliasedColumns()
} else {
for _, from := range stmt.From {
//u.Debugf("cols: %v", from.Columns)
for _, col := range from.Columns {
_, right, _ := col.LeftRight()
if _, ok := cols[right]; !ok {
//u.Debugf("col: %#v", col)
cols[right] = col.Copy()
cols[right].Index = len(cols) - 1
} else {
//u.Debugf("has col: %#v", col)
}
}
}
}
//u.Debugf("found where columns: %d", len(cols))
s.Handler = whereFilter(where, s, cols)
return s
}
// Where-Filter
func NewWhereFilter(where expr.Node, stmt *expr.SqlSelect) *Where {
s := &Where{
TaskBase: NewTaskBase("WhereFilter"),
where: where,
}
cols := stmt.UnAliasedColumns()
s.Handler = whereFilter(where, s, cols)
return s
}