func (s *stmt) Query(args []driver.Value) (driver.Rows, error) {
if s.closed {
panic("database/sql/driver: misuse of sqlite driver: Query after Close")
}
if s.rows {
panic("database/sql/driver: misuse of sqlite driver: Query with active Rows")
}
err := s.start(args)
if err != nil {
return nil, err
}
s.rows = true
if s.colnames == nil {
n := int64(C.sqlite3_column_count(s.stmt))
s.colnames = make([]string, n)
s.coltypes = make([]string, n)
for i := range s.colnames {
s.colnames[i] = C.GoString(C.sqlite3_column_name(s.stmt, C.int(i)))
s.coltypes[i] = strings.ToLower(C.GoString(C.sqlite3_column_decltype(s.stmt, C.int(i))))
}
}
return &rows{s}, nil
}
func (s *SQLiteStmt) query(ctx context.Context, args []namedValue) (driver.Rows, error) {
if err := s.bind(args); err != nil {
return nil, err
}
rows := &SQLiteRows{
s: s,
nc: int(C.sqlite3_column_count(s.s)),
cols: nil,
decltype: nil,
cls: s.cls,
done: make(chan struct{}),
}
go func() {
select {
case <-ctx.Done():
C.sqlite3_interrupt(s.c.db)
rows.Close()
case <-rows.done:
}
}()
return rows, nil
}
// newStmt creates a new prepared statement.
func newStmt(c *Conn, sql string) (*Stmt, error) {
zSql := sql + "\x00"
var stmt *C.sqlite3_stmt
var tail *C.char
rc := C.sqlite3_prepare_v2(c.db, cStr(zSql), -1, &stmt, &tail)
if rc != OK {
return nil, libErr(rc, c.db)
}
// stmt will be nil if sql contained only comments or whitespace. s.Tail may
// be useful to the caller, so s is still returned without an error.
s := &Stmt{conn: c, stmt: stmt}
if stmt != nil {
if s.nVars = int(C.sqlite3_bind_parameter_count(stmt)); s.nVars == 0 {
s.varNames = unnamedVars
}
s.nCols = int(C.sqlite3_column_count(stmt))
runtime.SetFinalizer(s, (*Stmt).Close)
}
if tail != nil {
if n := cStrOffset(zSql, tail); n < len(sql) {
sql, s.Tail = sql[:n], sql[n:]
}
}
s.text = sql
return s, nil
}
func (rows Rows) Columns() []string {
count := int(C.sqlite3_column_count(rows.stmt))
cols := make([]string, count)
for i := 0; i < count; i++ {
cols[i] = C.GoString(C.sqlite3_column_name(rows.stmt, C.int(i)))
}
return cols
}
func (s *Stmt) Scan(args ...interface{}) error {
n := int(C.sqlite3_column_count(s.stmt))
if n != len(args) {
return errors.New(fmt.Sprintf("incorrect argument count for Stmt.Scan: have %d want %d", len(args), n))
}
for i, v := range args {
n := C.sqlite3_column_bytes(s.stmt, C.int(i))
p := C.sqlite3_column_blob(s.stmt, C.int(i))
if p == nil && n > 0 {
return errors.New("got nil blob")
}
var data []byte
if n > 0 {
data = (*[1 << 30]byte)(unsafe.Pointer(p))[0:n]
}
switch v := v.(type) {
case *[]byte:
*v = data
case *string:
*v = string(data)
case *bool:
*v = string(data) == "1"
case *int:
x, err := strconv.Atoi(string(data))
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as int: " + err.Error())
}
*v = x
case *int64:
x, err := strconv.ParseInt(string(data), 10, 64)
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as int64: " + err.Error())
}
*v = x
case *float64:
x, err := strconv.ParseFloat(string(data), 64)
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as float64: " + err.Error())
}
*v = x
default:
return errors.New("unsupported type in Scan: " + reflect.TypeOf(v).String())
}
}
return nil
}
// exec resets the prepared statement, binds new parameter values, and executes
// the first step.
func (s *Stmt) exec(args []interface{}) (err error) {
if s.haveRow {
s.Reset()
}
if named := namedArgs(args); named != nil {
err = s.bindNamed(named)
} else {
err = s.bindUnnamed(args)
}
if err == nil {
err = s.step()
if s.nCols > 0 {
// If the statement was recompiled (v2 interface, no indication),
// then column counts, names, and declarations may have changed and
// need to be reloaded.
s.nCols = int(C.sqlite3_column_count(s.stmt))
s.colNames = s.colNames[:0]
s.colDecls = s.colDecls[:0]
}
} else if s.nVars > 0 {
C.sqlite3_clear_bindings(s.stmt)
}
return
}
// Query the statement with arguments. Return records.
func (s *SQLiteStmt) Query(args []driver.Value) (driver.Rows, error) {
if err := s.bind(args); err != nil {
return nil, err
}
return &SQLiteRows{s, int(C.sqlite3_column_count(s.s)), nil, nil, s.cls}, nil
}
func (self *sqlStatement) sqlColumnCount() int {
return int(C.sqlite3_column_count(self.handle))
}
// ColumnCount returns the number of columns in the result set for the statement (with or without row).
// (See http://sqlite.org/c3ref/column_count.html)
func (s *Stmt) ColumnCount() int {
if s.columnCount == -1 {
s.columnCount = int(C.sqlite3_column_count(s.stmt))
}
return s.columnCount
}
func (s *Statement) Columns() int {
return int(C.sqlite3_column_count(s.cptr))
}
// Return the number of columns in the result set returned by the prepared statement.
func (h *Statement) ColumnCount() int {
return int(C.sqlite3_column_count(h.cptr))
}
func Columns(stmnt *Stmt) int {
return int(C.sqlite3_column_count(stmnt.stmt))
}
func (s *Stmt) Scan(args ...interface{}) os.Error {
n := int(C.sqlite3_column_count(s.stmt))
if n != len(args) {
return os.NewError("incorrect argument count")
}
for i, v := range args {
n := C.sqlite3_column_bytes(s.stmt, C.int(i))
p := C.sqlite3_column_blob(s.stmt, C.int(i))
if p == nil && n > 0 {
return os.NewError("got nil blob")
}
var data []byte
if n > 0 {
// fix(jimt): Must make a copy here. Once Stmt.Finalize() is called,
// this memory becomes invalid. This was done on purpose according
// to Russ: http://code.google.com/p/gosqlite/issues/detail?id=1
// I prefer it with the copy statement here. Behaviour otherwise is
// misleading and cost me 3 hours of hair pulling.
data = make([]byte, n)
copy(data, (*[1<<31 - 1]byte)(unsafe.Pointer(p))[0:n])
}
switch v := v.(type) {
case *[]byte:
*v = data
case *string:
*v = string(data)
case *bool:
*v = string(data) == "1"
case *int:
x, err := strconv.Atoi(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = x
case *int8:
x, err := strconv.Atoi(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = int8(x)
case *int16:
x, err := strconv.Atoi(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = int16(x)
case *int32:
x, err := strconv.Atoi(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = int32(x)
case *int64:
x, err := strconv.Atoi64(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int64: " + err.String())
}
*v = x
case *uint:
x, err := strconv.Atoui(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = x
case *uint8:
x, err := strconv.Atoui(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = uint8(x)
case *uint16:
x, err := strconv.Atoui(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = uint16(x)
case *uint32:
x, err := strconv.Atoui(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int: " + err.String())
}
*v = uint32(x)
case *uint64:
x, err := strconv.Atoui64(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as int64: " + err.String())
}
*v = x
case *float:
x, err := strconv.Atof(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as float64: " + err.String())
}
*v = x
case *float32:
x, err := strconv.Atof32(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as float64: " + err.String())
}
*v = x
case *float64:
x, err := strconv.Atof64(string(data))
if err != nil {
return os.NewError("arg " + strconv.Itoa(i) + " as float64: " + err.String())
}
*v = x
default:
return os.NewError("unsupported type in Scan: " + reflect.Typeof(v).String())
}
}
return nil
}
func (s *Stmt) NumColumns() int {
return int(C.sqlite3_column_count(s.stmt))
}
func (s *Stmt) Scan(args ...interface{}) error {
n := int(C.sqlite3_column_count(s.stmt))
if n != len(args) {
return errors.New(fmt.Sprintf("incorrect argument count for Stmt.Scan: have %d want %d", len(args), n))
}
for i, v := range args {
if C.sqlite3_column_type(s.stmt, C.int(i)) == C.SQLITE_NULL {
switch v := v.(type) {
case *[]byte:
*v = nil
case *string:
*v = ""
case *bool:
*v = false
case *int:
*v = 0
case *int64:
*v = 0
case *uint64:
*v = 0
case *uint32:
*v = 0
case *float64:
*v = 0.0
case *NullTime:
*v = NullTime{Valid: false}
default:
return errors.New("unsupported type in Scan: " + reflect.TypeOf(v).String())
}
} else {
n := C.sqlite3_column_bytes(s.stmt, C.int(i))
p := C.sqlite3_column_blob(s.stmt, C.int(i))
if p == nil && n > 0 {
return errors.New("got nil blob")
}
var data []byte
if n > 0 {
data = (*[1 << 30]byte)(unsafe.Pointer(p))[0:n]
}
switch v := v.(type) {
case *[]byte:
*v = data
case *string:
*v = string(data)
case *bool:
*v = string(data) == "1"
case *int:
x, err := strconv.Atoi(string(data))
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as int: " + err.Error())
}
*v = x
case *int64:
x, err := strconv.ParseInt(string(data), 10, 64)
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as int64: " + err.Error())
}
*v = x
case *uint64:
x, err := strconv.ParseUint(string(data), 10, 64)
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as int64: " + err.Error())
}
*v = x
case *uint32:
x, err := strconv.ParseUint(string(data), 10, 32)
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as int64: " + err.Error())
}
*v = uint32(x)
case *float64:
x, err := strconv.ParseFloat(string(data), 64)
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as float64: " + err.Error())
}
*v = x
case *NullTime:
x, err := time.Parse(ISO8601, string(data))
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as time: " + err.Error())
}
*v = NullTime{Time: x, Valid: true}
case *time.Time:
x, err := time.Parse(ISO8601, string(data))
if err != nil {
return errors.New("arg " + strconv.Itoa(i) + " as time: " + err.Error())
}
*v = x
default:
return errors.New("unsupported type in Scan: " + reflect.TypeOf(v).String())
}
}
}
return nil
}