func NewError(apiName string, handle interface{}) error {
h, ht := ToHandleAndType(handle)
err := &Error{APIName: apiName}
var ne api.SQLINTEGER
state := make([]uint16, 6)
msg := make([]uint16, api.SQL_MAX_MESSAGE_LENGTH)
for i := 1; ; i++ {
ret := api.SQLGetDiagRec(ht, h, api.SQLSMALLINT(i),
(*api.SQLWCHAR)(unsafe.Pointer(&state[0])), &ne,
(*api.SQLWCHAR)(unsafe.Pointer(&msg[0])),
api.SQLSMALLINT(len(msg)), nil)
if ret == api.SQL_NO_DATA {
break
}
if IsError(ret) {
panic(fmt.Errorf("SQLGetDiagRec failed: ret=%d", ret))
}
r := DiagRecord{
State: api.UTF16ToString(state),
NativeError: int(ne),
Message: api.UTF16ToString(msg),
}
err.Diag = append(err.Diag, r)
}
return err
}
func describeColumn(h api.SQLHSTMT, idx int, namebuf []uint16) (namelen int, sqltype api.SQLSMALLINT, size api.SQLULEN, ret api.SQLRETURN) {
var l, decimal, nullable api.SQLSMALLINT
ret = api.SQLDescribeCol(h, api.SQLUSMALLINT(idx+1),
(*api.SQLWCHAR)(unsafe.Pointer(&namebuf[0])),
api.SQLSMALLINT(len(namebuf)), &l,
&sqltype, &size, &decimal, &nullable)
return int(l), sqltype, size, ret
}
func (d *Driver) Open(dsn string) (driver.Conn, error) {
var out api.SQLHANDLE
ret := api.SQLAllocHandle(api.SQL_HANDLE_DBC, api.SQLHANDLE(d.h), &out)
if IsError(ret) {
return nil, NewError("SQLAllocHandle", d.h)
}
h := api.SQLHDBC(out)
drv.Stats.updateHandleCount(api.SQL_HANDLE_DBC, 1)
b := api.StringToUTF16(dsn)
ret = api.SQLDriverConnect(h, 0,
(*api.SQLWCHAR)(unsafe.Pointer(&b[0])), api.SQLSMALLINT(len(b)),
nil, 0, nil, api.SQL_DRIVER_NOPROMPT)
if IsError(ret) {
defer releaseHandle(h)
return nil, NewError("SQLDriverConnect", h)
}
return &Conn{h: h}, nil
}