谷歌内部项目：大模型AI智能体发现了代码漏洞

7476:   struct sqlite3_index_constraint {
7477:      int iColumn;              /* Column constrained.  -1 for ROWID */
7478:      unsigned char op;         /* Constraint operator */
7479:      unsigned char usable;     /* True if this constraint is usable */
7480:      int iTermOffset;          /* Used internally - xBestIndex should ignore */
7481:   } *aConstraint;            /* Table of WHERE clause constraints */

619 static int seriesBestIndex(
620   sqlite3_vtab *pVTab,
621   sqlite3_index_info *pIdxInfo
622 ){
...
630   int aIdx[7];           /* Constraints on start, stop, step, LIMIT, OFFSET,
631                          ** and value.  aIdx[5] covers value=, value>=, and
632                          ** value>,  aIdx[6] covers value
633   const struct sqlite3_index_constraint *pConstraint;
...
642   for(i=0; inConstraint; i++, pConstraint++){
643     int iCol;    /* 0 for start, 1 for stop, 2 for step */
644     int iMask;   /* bitmask for those column */
645     int op = pConstraint->op;
...
705     iCol = pConstraint->iColumn - SERIES_COLUMN_START;
706     assert( iCol>=0 && iCol
707     iMask = 1 
...
713     if( pConstraint->usable==0 ){
714       unusableMask |=  iMask;
715       continue;
716     }else if( op==SQLITE_INDEX_CONSTRAINT_EQ ){
717       idxNum |= iMask;
718       aIdx[iCol] = i;
719     }
720   }