153 lines
3.8 KiB
Go
153 lines
3.8 KiB
Go
/* WIP Under Construction */
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package qgen
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import (
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"database/sql"
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"errors"
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)
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var Registry []Adapter
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var ErrNoAdapter = errors.New("This adapter doesn't exist")
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type DBTableColumn struct {
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Name string
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Type string
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Size int
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Null bool
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AutoIncrement bool
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Default string
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}
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type DBTableKey struct {
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Columns string
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Type string
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}
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type DBSelect struct {
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Table string
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Columns string
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Where string
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Orderby string
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Limit string
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}
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type DBJoin struct {
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Table1 string
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Table2 string
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Columns string
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Joiners string
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Where string
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Orderby string
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Limit string
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}
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type DBInsert struct {
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Table string
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Columns string
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Fields string
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}
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type DBColumn struct {
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Table string
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Left string // Could be a function or a column, so I'm naming this Left
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Alias string // aka AS Blah, if it's present
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Type string // function or column
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}
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type DBField struct {
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Name string
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Type string
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}
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type DBWhere struct {
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Expr []DBToken // Simple expressions, the innards of functions are opaque for now.
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}
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type DBJoiner struct {
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LeftTable string
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LeftColumn string
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RightTable string
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RightColumn string
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Operator string
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}
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type DBOrder struct {
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Column string
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Order string
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}
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type DBToken struct {
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Contents string
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Type string // function, operator, column, number, string, substitute
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}
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type DBSetter struct {
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Column string
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Expr []DBToken // Simple expressions, the innards of functions are opaque for now.
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}
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type DBLimit struct {
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Offset string // ? or int
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MaxCount string // ? or int
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}
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type DBStmt struct {
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Contents string
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Type string // create-table, insert, update, delete
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}
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type Adapter interface {
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GetName() string
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CreateTable(name string, table string, charset string, collation string, columns []DBTableColumn, keys []DBTableKey) (string, error)
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SimpleInsert(name string, table string, columns string, fields string) (string, error)
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// ! DEPRECATED
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//SimpleReplace(name string, table string, columns string, fields string) (string, error)
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// ! NOTE: MySQL doesn't support upserts properly, so I'm removing this from the interface until we find a way to patch it in
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//SimpleUpsert(name string, table string, columns string, fields string, where string) (string, error)
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SimpleUpdate(name string, table string, set string, where string) (string, error)
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SimpleDelete(name string, table string, where string) (string, error)
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Purge(name string, table string) (string, error)
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SimpleSelect(name string, table string, columns string, where string, orderby string, limit string) (string, error)
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SimpleLeftJoin(name string, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (string, error)
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SimpleInnerJoin(string, string, string, string, string, string, string, string) (string, error)
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SimpleInsertSelect(string, DBInsert, DBSelect) (string, error)
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SimpleInsertLeftJoin(string, DBInsert, DBJoin) (string, error)
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SimpleInsertInnerJoin(string, DBInsert, DBJoin) (string, error)
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SimpleCount(string, string, string, string) (string, error)
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Builder() *prebuilder
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Write() error
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}
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func GetAdapter(name string) (adap Adapter, err error) {
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for _, adapter := range Registry {
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if adapter.GetName() == name {
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return adapter, nil
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}
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}
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return adap, ErrNoAdapter
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}
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type QueryPlugin interface {
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Hook(name string, args ...interface{}) error
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Write() error
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}
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type MySQLUpsertCallback struct {
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stmt *sql.Stmt
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}
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func (double *MySQLUpsertCallback) Exec(args ...interface{}) (res sql.Result, err error) {
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if len(args) < 2 {
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return res, errors.New("Need two or more arguments")
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}
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args = args[:len(args)-1]
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return double.stmt.Exec(append(args, args...)...)
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}
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func PrepareMySQLUpsertCallback(db *sql.DB, query string) (*MySQLUpsertCallback, error) {
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stmt, err := db.Prepare(query)
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return &MySQLUpsertCallback{stmt}, err
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}
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