gosora/query_gen/lib/querygen.go

88 lines
1.9 KiB
Go

/* WIP Under Construction */
package qgen
import "errors"
var DB_Registry []DB_Adapter
var No_Adapter = errors.New("This adapter doesn't exist")
type DB_Column struct
{
Table string
Left string // Could be a function or a column, so I'm naming this Left
Alias string // aka AS Blah, if it's present
Type string // function or column
}
type DB_Field struct
{
Name string
Type string
}
type DB_Where struct
{
LeftTable string
LeftColumn string
RightTable string
RightColumn string
Operator string
LeftType string
RightType string
}
type DB_Joiner struct
{
LeftTable string
LeftColumn string
RightTable string
RightColumn string
Operator string
}
type DB_Order struct
{
Column string
Order string
}
type DB_Token struct {
Contents string
Type string // function, operator, column, number, string, substitute
}
type DB_Setter struct {
Column string
Expr []DB_Token // Simple expressions, the innards of functions are opaque for now.
}
type DB_Limit struct {
Offset string // ? or int
MaxCount string // ? or int
}
type DB_Adapter interface {
GetName() string
SimpleInsert(string,string,string,string) (string, error)
SimpleReplace(string,string,string,string) (string, error)
SimpleUpdate(string,string,string,string) (string, error)
SimpleDelete(string,string,string) (string, error)
Purge(string,string) (string, error)
SimpleSelect(string,string,string,string,string,string) (string, error)
SimpleLeftJoin(string,string,string,string,string,string,string,string) (string, error)
SimpleInnerJoin(string,string,string,string,string,string,string,string) (string, error)
SimpleCount(string,string,string,string) (string, error)
Write() error
// TO-DO: Add a simple query builder
}
func GetAdapter(name string) (adap DB_Adapter, err error) {
for _, adapter := range DB_Registry {
if adapter.GetName() == name {
return adapter, nil
}
}
return adap, No_Adapter
}