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),
}
if r.State == "08S01" {
return driver.ErrBadConn
}
err.Diag = append(err.Diag, r)
}
return err
}
func NewColumn(h api.SQLHSTMT, idx int) (Column, error) {
namebuf := make([]uint16, 150)
namelen, sqltype, size, ret := describeColumn(h, idx, namebuf)
if ret == api.SQL_SUCCESS_WITH_INFO && namelen > len(namebuf) {
// try again with bigger buffer
namebuf = make([]uint16, namelen)
namelen, sqltype, size, ret = describeColumn(h, idx, namebuf)
}
if IsError(ret) {
return nil, NewError("SQLDescribeCol", h)
}
if namelen > len(namebuf) {
// still complaining about buffer size
return nil, errors.New("Failed to allocate column name buffer")
}
b := &BaseColumn{
name: api.UTF16ToString(namebuf[:namelen]),
}
switch sqltype {
case api.SQL_BIT:
return NewBindableColumn(b, api.SQL_C_BIT, 1), nil
case api.SQL_TINYINT, api.SQL_SMALLINT, api.SQL_INTEGER:
return NewBindableColumn(b, api.SQL_C_LONG, 4), nil
case api.SQL_BIGINT:
return NewBindableColumn(b, api.SQL_C_SBIGINT, 8), nil
case api.SQL_NUMERIC, api.SQL_DECIMAL, api.SQL_FLOAT, api.SQL_REAL, api.SQL_DOUBLE:
return NewBindableColumn(b, api.SQL_C_DOUBLE, 8), nil
case api.SQL_TYPE_TIMESTAMP:
var v api.SQL_TIMESTAMP_STRUCT
return NewBindableColumn(b, api.SQL_C_TYPE_TIMESTAMP, int(unsafe.Sizeof(v))), nil
case api.SQL_TYPE_DATE:
var v api.SQL_DATE_STRUCT
return NewBindableColumn(b, api.SQL_C_DATE, int(unsafe.Sizeof(v))), nil
case api.SQL_GUID:
var v api.SQLGUID
return NewBindableColumn(b, api.SQL_C_GUID, int(unsafe.Sizeof(v))), nil
case api.SQL_CHAR, api.SQL_VARCHAR:
return NewVariableWidthColumn(b, api.SQL_C_CHAR, size), nil
case api.SQL_WCHAR, api.SQL_WVARCHAR:
return NewVariableWidthColumn(b, api.SQL_C_WCHAR, size), nil
case api.SQL_BINARY, api.SQL_VARBINARY:
return NewVariableWidthColumn(b, api.SQL_C_BINARY, size), nil
case api.SQL_LONGVARCHAR:
return NewVariableWidthColumn(b, api.SQL_C_CHAR, 0), nil
case api.SQL_WLONGVARCHAR, api.SQL_SS_XML:
return NewVariableWidthColumn(b, api.SQL_C_WCHAR, 0), nil
case api.SQL_LONGVARBINARY:
return NewVariableWidthColumn(b, api.SQL_C_BINARY, 0), nil
default:
return nil, fmt.Errorf("unsupported column type %d", sqltype)
}
panic("unreachable")
}