addrIsNull       89281 ext/sqlite3/libsqlite/sqlite3.c       int addrIsNull;
addrIsNull       89288 ext/sqlite3/libsqlite/sqlite3.c       addrIsNull = sqlite3VdbeAddOp1(v, OP_IsNull, regSampleRowid);
addrIsNull       89312 ext/sqlite3/libsqlite/sqlite3.c       sqlite3VdbeJumpHere(v, addrIsNull);