func (e *XSelectIndexExec) doIndexRequest() (*xapi.SelectResult, error) {
txn, err := e.ctx.GetTxn(false)
if err != nil {
return nil, errors.Trace(err)
}
selIdxReq := new(tipb.SelectRequest)
startTs := txn.StartTS()
selIdxReq.StartTs = &startTs
selIdxReq.IndexInfo = tablecodec.IndexToProto(e.table.Meta(), e.indexPlan.Index)
if len(e.indexPlan.FilterConditions) == 0 {
// Push limit to index request only if there is not filter conditions.
selIdxReq.Limit = e.indexPlan.LimitCount
}
if e.indexPlan.Desc {
selIdxReq.OrderBy = append(selIdxReq.OrderBy, &tipb.ByItem{Desc: &e.indexPlan.Desc})
}
fieldTypes := make([]*types.FieldType, len(e.indexPlan.Index.Columns))
for i, v := range e.indexPlan.Index.Columns {
fieldTypes[i] = &(e.table.Cols()[v.Offset].FieldType)
}
selIdxReq.Ranges, err = indexRangesToPBRanges(e.indexPlan.Ranges, fieldTypes)
if err != nil {
return nil, errors.Trace(err)
}
concurrency := 1
if e.indexPlan.OutOfOrder {
concurrency = 10
}
return xapi.Select(txn.GetClient(), selIdxReq, concurrency)
}
func (e *XSelectIndexExec) doIndexRequest(txn kv.Transaction) (*xapi.SelectResult, error) {
selIdxReq := new(tipb.SelectRequest)
startTs := txn.StartTS()
selIdxReq.StartTs = &startTs
selIdxReq.IndexInfo = tablecodec.IndexToProto(e.table.Meta(), e.indexPlan.Index)
var err error
selIdxReq.Ranges, err = indexRangesToPBRanges(e.indexPlan.Ranges)
if err != nil {
return nil, errors.Trace(err)
}
return xapi.Select(txn.GetClient(), selIdxReq, 1)
}