// extractHandlesFromIndexResult gets some handles from SelectResult.
// It should be called in a loop until finished or error happened.
func extractHandlesFromIndexResult(idxResult xapi.SelectResult) (handles []int64, finish bool, err error) {
subResult, e0 := idxResult.Next()
if e0 != nil {
err = errors.Trace(e0)
return
}
if subResult == nil {
finish = true
return
}
handles, err = extractHandlesFromIndexSubResult(subResult)
if err != nil {
err = errors.Trace(err)
}
return
}
func (e *XSelectIndexExec) extractRowsFromTableResult(t table.Table, tblResult *xapi.SelectResult) ([]*Row, error) {
var rows []*Row
for {
subResult, err := tblResult.Next()
if err != nil {
return nil, errors.Trace(err)
}
if subResult == nil {
break
}
subRows, err := e.extractRowsFromSubResult(t, subResult)
if err != nil {
return nil, errors.Trace(err)
}
rows = append(rows, subRows...)
}
return rows, nil
}
func extractHandlesFromIndexResult(idxResult *xapi.SelectResult) ([]int64, error) {
var handles []int64
for {
subResult, err := idxResult.Next()
if err != nil {
return nil, errors.Trace(err)
}
if subResult == nil {
break
}
subHandles, err := extractHandlesFromIndexSubResult(subResult)
if err != nil {
return nil, errors.Trace(err)
}
handles = append(handles, subHandles...)
}
return handles, nil
}