312   i16 iColumn;         /* The column on the LHS of the term.  -1 for IPK */  in whereScanNext()  local
321     iColumn = pScan->aiColumn[pScan->iEquiv-1];  in whereScanNext()
329          && pTerm->u.x.leftColumn==iColumn  in whereScanNext()
330          && (iColumn!=XN_EXPR  in whereScanNext()
342                && pScan->aiColumn[j]==pX->iColumn ){  in whereScanNext()
348               pScan->aiColumn[j] = pX->iColumn;  in whereScanNext()
372              && pX->iColumn==pScan->aiColumn[0]  in whereScanNext()
440   int iColumn,            /* Column to scan for */  in whereScanInit()  argument
455     int j = iColumn;  in whereScanInit()
456     iColumn = pIdx->aiColumn[j];  in whereScanInit()
457     if( iColumn==pIdx->pTable->iPKey ){  in whereScanInit()
458       iColumn = XN_ROWID;  in whereScanInit()
459     }else if( iColumn>=0 ){  in whereScanInit()
460       pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;  in whereScanInit()
462     }else if( iColumn==XN_EXPR ){  in whereScanInit()
468   }else if( iColumn==XN_EXPR ){  in whereScanInit()
471   pScan->aiColumn[0] = iColumn;  in whereScanInit()
503   int iColumn,          /* Column number of LHS */  in sqlite3WhereFindTerm()  argument
512   p = whereScanInit(&scan, pWC, iCur, iColumn, op, pIdx);  in sqlite3WhereFindTerm()
548      && p->iColumn==pIdx->aiColumn[iCol]  in findIndexCol()
613     if( p->iTable==iBase && p->iColumn<0 ) return 1;  in isDistinctRedundant()
713        p->aConstraint[i].iColumn,  in whereTraceIndexInfoInputs()
722        p->aOrderBy[i].iColumn,  in whereTraceIndexInfoInputs()
1243         assert( pExpr->iColumn>=XN_ROWID && pExpr->iColumn<pTab->nCol );  in allocateIndexInfo()
1256         assert( pE2->iColumn>=XN_ROWID && pE2->iColumn<pTab->nCol );  in allocateIndexInfo()
1257         pExpr->iColumn = pE2->iColumn;  in allocateIndexInfo()
1258         if( pE2->iColumn<0 ) continue;  /* Collseq does not matter for rowid */  in allocateIndexInfo()
1259         zColl = sqlite3ColumnColl(&pTab->aCol[pE2->iColumn]);  in allocateIndexInfo()
1301     pIdxCons[j].iColumn = pTerm->u.x.leftColumn;  in allocateIndexInfo()
1349               && pExpr->iColumn==pExpr->pLeft->iColumn) );  in allocateIndexInfo()
1350     pIdxOrderBy[j].iColumn = pExpr->iColumn;  in allocateIndexInfo()
2744      || pLhs->iColumn!=pIdx->aiColumn[i+nEq]   in whereRangeVectorLen()
2750     testcase( pLhs->iColumn==XN_ROWID );  in whereRangeVectorLen()
2752     idxaff = sqlite3TableColumnAffinity(pIdx->pTable, pLhs->iColumn);  in whereRangeVectorLen()
3200       if( pExpr->iColumn<0 ) return 1;  in indexMightHelpWithOrderBy()
3202         if( pExpr->iColumn==pIndex->aiColumn[jj] ) return 1;  in indexMightHelpWithOrderBy()
3278   if( pExpr->iColumn<(BMS-1) ) return WRC_Continue;  in whereIsCoveringIndexWalkCallback()
3284     if( aiColumn[i]==pExpr->iColumn ) return WRC_Continue;  in whereIsCoveringIndexWalkCallback()
4376   int iColumn;          /* A column number within table iCur */  in wherePathSatisfiesOrderBy()  local
4455       pTerm = sqlite3WhereFindTerm(&pWInfo->sWC, iCur, pOBExpr->iColumn,  in wherePathSatisfiesOrderBy()
4467       if( (pTerm->eOperator&(WO_EQ|WO_IS))!=0 && pOBExpr->iColumn>=0 ){  in wherePathSatisfiesOrderBy()
4555           iColumn = pIndex->aiColumn[j];  in wherePathSatisfiesOrderBy()
4557           if( iColumn==pIndex->pTable->iPKey ) iColumn = XN_ROWID;  in wherePathSatisfiesOrderBy()
4559           iColumn = XN_ROWID;  in wherePathSatisfiesOrderBy()
4567           if( iColumn>=0  in wherePathSatisfiesOrderBy()
4569            && pIndex->pTable->aCol[iColumn].notNull==0  in wherePathSatisfiesOrderBy()
4573           if( iColumn==XN_EXPR ){  in wherePathSatisfiesOrderBy()
4589           if( iColumn>=XN_ROWID ){  in wherePathSatisfiesOrderBy()
4592             if( pOBExpr->iColumn!=iColumn ) continue;  in wherePathSatisfiesOrderBy()
4599           if( iColumn!=XN_ROWID ){  in wherePathSatisfiesOrderBy()
4632           if( iColumn==XN_ROWID ){  in wherePathSatisfiesOrderBy()