15789 typedef struct Upsert Upsert;  typedef
19917 struct Upsert {  struct
19918   ExprList *pUpsertTarget;  /* Optional description of conflict target */  argument
19919   Expr *pUpsertTargetWhere; /* WHERE clause for partial index targets */  argument
19920   ExprList *pUpsertSet;     /* The SET clause from an ON CONFLICT UPDATE */  argument
19921   Expr *pUpsertWhere;       /* WHERE clause for the ON CONFLICT UPDATE */  argument
19922   Upsert *pNextUpsert;      /* Next ON CONFLICT clause in the list */  argument
19924   u8 isDup;                 /* True if 2nd or later with same pUpsertIdx */  argument
19927   void *pToFree;            /* Free memory when deleting the Upsert object */  argument
19933   Index *pUpsertIdx;        /* UNIQUE constraint specified by pUpsertTarget */  argument
19934   SrcList *pUpsertSrc;      /* Table to be updated */  argument
19935   int regData;              /* First register holding array of VALUES */
19936   int iDataCur;             /* Index of the data cursor */
19937   int iIdxCur;              /* Index of the first index cursor */