1186 typedef struct FKey FKey;  typedef
2422 struct FKey {  struct
2424   FKey *pNextFrom;  /* Next FKey with the same in pFrom. Next parent of pFrom */  argument
2426   FKey *pNextTo;    /* Next with the same zTo. Next child of zTo. */  argument
2427   FKey *pPrevTo;    /* Previous with the same zTo */  argument
2428   int nCol;         /* Number of columns in this key */
2430   u8 isDeferred;       /* True if constraint checking is deferred till COMMIT */
2431   u8 aAction[2];        /* ON DELETE and ON UPDATE actions, respectively */
2432   Trigger *apTrigger[2];/* Triggers for aAction[] actions */
2433   struct sColMap {      /* Mapping of columns in pFrom to columns in zTo */
2436   } aCol[1];            /* One entry for each of nCol columns */