isCovering       11751 ext/sqlite3/libsqlite/sqlite3.c   unsigned isCovering:1;   /* True if this is a covering index */
isCovering       92530 ext/sqlite3/libsqlite/sqlite3.c   pPk->isCovering = 1;
isCovering       121382 ext/sqlite3/libsqlite/sqlite3.c       if( pProbe->isCovering ){
isCovering       122503 ext/sqlite3/libsqlite/sqlite3.c       if( pIdx->isCovering || (pItem->colUsed & ~columnsInIndex(pIdx))==0 ){