SHashObj*pResultRowHashTable;// quick locate the window object for each result
char*keyBuf;// window key buffer
SDiskbasedBuf*pResultBuf;// query result buffer based on blocked-wised disk file
int32_tresultRowSize;// the result buffer size for each result row, with the meta data size for each row
}SAggSupporter;
typedefstruct{
// if the upstream is an interval operator, the interval info is also kept here to get the time window to check if current data block needs to be loaded.
SIntervalinterval;
SAggSupporter*pAggSup;
SExprSupp*pExprSup;// expr supporter of aggregate operator
int32_tscanFlag;// table scan flag to denote if it is a repeat/reverse/main scan
int32_tdataBlockLoadFlag;
SIntervalinterval;// if the upstream is an interval operator, the interval info is also kept here to get the time window to check if current data block needs to be loaded.
// SInterval interval; // if the upstream is an interval operator, the interval info is also kept here to get the time window to check if current data block needs to be loaded.