91   sqlite3_int64 iStep;       /* Increment ("step") */  member
174     pCur->iValue -= pCur->iStep;  in seriesNext()
176     pCur->iValue += pCur->iStep;  in seriesNext()
196     case SERIES_COLUMN_STEP:   x = pCur->iStep;   break;  in seriesColumn()
276     pCur->iStep = sqlite3_value_int64(argv[i++]);  in seriesFilter()
277     if( pCur->iStep==0 ){  in seriesFilter()
278       pCur->iStep = 1;  in seriesFilter()
279     }else if( pCur->iStep<0 ){  in seriesFilter()
280       pCur->iStep = -pCur->iStep;  in seriesFilter()
284     pCur->iStep = 1;  in seriesFilter()
298     if( pCur->iStep>0 ){  in seriesFilter()
299       pCur->iValue -= (pCur->mxValue - pCur->mnValue)%pCur->iStep;  in seriesFilter()