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access.go
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access.go
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package lnssqlite3
import (
"database/sql"
// "database/sql/driver"
//"fmt"
_ "github.com/mattn/go-sqlite3"
. "github.com/ifritJP/LuneScript/src/lune/base/runtime_go"
"log"
// "os"
)
type DB struct {
tx *sql.Tx
sqldb *sql.DB
}
func Open( path string, readonly bool, onMemoryFlag bool ) (LnsAny, string) {
db, err := sql.Open("sqlite3", path )
if err != nil {
return nil, err.Error()
}
return &DB{ nil, db }, "ok"
}
func (db *DB) Close() {
db.sqldb.Close()
}
func (db *DB) Exec( stmt string, errHandle LnsAny ) {
var err error
if db.tx == nil {
_, err = db.sqldb.Exec(stmt)
} else {
var preStmt *sql.Stmt
preStmt, err = db.tx.Prepare(stmt)
defer preStmt.Close()
preStmt.Exec()
}
if err != nil {
if errHandle != nil {
errHandleFunc := errHandle.(func( stmt string, msg string ))
errHandleFunc( stmt, err.Error() )
} else {
log.Fatal( err )
}
}
}
func (db *DB) Begin() {
tx, err := db.sqldb.Begin()
if err != nil {
log.Fatal(err)
}
db.tx = tx
}
func (db *DB) Commit() {
if db.tx != nil {
db.tx.Commit()
db.tx = nil
}
}
func (db *DB) MapQuery( query string, callback LnsAny ) bool {
rows, err := db.sqldb.Query( query )
if err != nil {
log.Fatal(err)
}
defer rows.Close()
columnNames, _ := rows.Columns()
hasRow := false
columns := make( []LnsAny, len( columnNames ) )
columnsBuf := make( []LnsAny, len( columnNames ) )
for index := 0; index < len( columnNames ); index++ {
var val LnsAny = nil
columnsBuf[ index ] = &val
}
for rows.Next() {
if !hasRow {
hasRow = true
}
if err := rows.Scan( columnsBuf... ); err != nil {
log.Fatal( err )
}
for index := 0; index < len( columnNames ); index++ {
ifVal := *(columnsBuf[index].(*LnsAny))
switch ifVal.(type) {
case int64:
columns[ index ] = LnsInt( ifVal.(int64) )
case []byte:
columns[ index ] = string( ifVal.([]byte ) )
default:
columns[ index ] = ifVal
}
}
if callback != nil {
callbackFunc := callback.(Base_queryForm)
if !callbackFunc( NewLnsList( columns ) ) {
break
}
}
}
err = rows.Err()
if err != nil {
log.Fatal(err)
}
return hasRow
}