sqliteBtreeClose
sqliteBtreeClose(db->aDb[i].pBt);
sqliteBtreeClose(pDb->pBt);
sqliteBtreeClose(db->aDb[iDb].pBt);
sqliteBtreeClose(pDb->pBt);
sqliteBtreeClose(db->aDb[1].pBt);
rc = sqliteBtreeClose(pBt);
sqliteBtreeClose(pCx->pBt);