28 typedef struct WhereLoop WhereLoop;  typedef
128 struct WhereLoop {  struct
129   Bitmask prereq;       /* Bitmask of other loops that must run first */
130   Bitmask maskSelf;     /* Bitmask identifying table iTab */
132   char cId;             /* Symbolic ID of this loop for debugging use */
134   u8 iTab;              /* Position in FROM clause of table for this loop */
135   u8 iSortIdx;          /* Sorting index number.  0==None */
136   LogEst rSetup;        /* One-time setup cost (ex: create transient index) */
137   LogEst rRun;          /* Cost of running each loop */
161 # define WHERE_LOOP_XFER_SZ offsetof(WhereLoop,nLSlot)  argument
164   WhereLoop *pNextLoop; /* Next WhereLoop object in the WhereClause */  argument
165   WhereTerm *aLTermSpace[3];  /* Initial aLTerm[] space */