and functioning, a full table scan is more likely to be selected if
that seems like the fastest solution. Only do this when STAT4 info
is available because an error has a large potential downside.
FossilOrigin-Name: 0e7e113d9f2c929c1f8a85e2cfad8e2e60f0e8770212b5e5320fb2a2c42911f8
an index when most of the rows will be selected. This branch is trying to
tune the query planner to make that happen more often.
FossilOrigin-Name: 0f42099ad65855c94af8472f3a6fddac7fc2a82e8fdfcc06a298eb6683a28688
in addition to sqlite3_malloc64(). Improvements to OOM processing and
debugging aids in the fuzzcheck utility.
FossilOrigin-Name: 602d7369166d406a26834aa47d71d565a17d377d32e41f308821a50b41f91896
This facilitates writing a query to find find the connected components of
an undirected graph.
FossilOrigin-Name: 5481fa8c79c34f434e99ab633ff3d0942a309a74fb0cf38e3d3617b51d5d21dd
documented to work.
See [forum:/forumpost/ba1dff667a|forum post ba1dff667a]
FossilOrigin-Name: d6fac8a1d3efeb2c4f03dae437b5b314765c93770a70603803a8039291dbcabb
Problem reported [forum:/info/80a9c47769772207|by forum post 80a9c47769772207].
FossilOrigin-Name: 883da4dadc88809192e4ed2f753f8883471fb43aa330bc58b017c66e1acedc6c
file. Enhance speedtest1.c so that it can more easily do performance
comparisons of cksumvfs.
FossilOrigin-Name: ed3bb818f58b75c087f2875331ec944397b6c61a5b14d8af4b9ec6f376bd1872
take a mandatory file lock, preventing other applications from even
reading the file.
FossilOrigin-Name: 05b573fdb27abec7d75aa1375325d45043cfd674f5b346fb341f001d7e04d160
it is an optimization and that virtual table implementations should be
prepared for it to always return false.
FossilOrigin-Name: 3e2643619d122616663688533977d6c60d45a269b4e2bdc330fd3ee5d39f2e03
more of the database files in the connection are read-only. Test cases
for this are in TH3.
FossilOrigin-Name: 2fa08c3963f008d4723c3f4f4496abcb6d4b575c85ba4a911a6aed5730b5948b
right after the OP_SeekGE. So use the P2 operand of OP_SeekScan to point
to the first instruction after OP_IdxGT. Problem found by dbsqlfuzz.
FossilOrigin-Name: 091d71939411bf2079098f09ddc0525f11f380119fd27114e2b3eec9a8ac0db4
in PRAGMA reverse_unordered_selects mode, as the OP_SeekScan only works
with forwards scans. Thanks to OSSFuzz for pointing out the problem to
us.
FossilOrigin-Name: c75c3a3b756635bfdab44e4b56a337e4a88af3a8803cd3e9a67abf3d0d3450dc
not try to use it there. Fix for ticket [2d5a3163563d559f]. Test
cases in TH3.
FossilOrigin-Name: dbec6910d9648f4907373c818a5cb347a2e487784208751ccecfacca752ff99d
later columns are constrained by an IN operator and the earlier index columns
limit the search to a small number of rows. Use the new OP_SeekScan opcode
which does scanning of the relevant range of the index but gives up and
falls back to doing a seek if the number of rows scanned grows to large,
in order to guard against pathological cases where the estimated number
of rows to be scanned is far too small.
FossilOrigin-Name: 4a43430fd23f88352c33b29c4c105b72f6dc821f94bf362040c41a1648c402e5
up based on the estimated number of comparisons needed to perform a seek.
FossilOrigin-Name: dc4172e6b8e1f62dc7329a3adb2223f290bc4c8055c265e88182ef432f4bcf10
ticket [5c4e7aa793943803] reports a case where the optimization does not
work.
FossilOrigin-Name: 7395e96b8cc370c8ac2657fb805915b0992a15d80f8bf256d277b423fec64675
if X is marked has having come from an ON or USING clause of a LEFT JOIN, then
be sure that all subexpressions of Y, not just the root node of Y, are
similarly marked. Otherwise, if Y is an AND operator, it will be split up
during WHERE clause analysis and the subexpressions will not get the special
treatment needed by LEFT JOIN ON/USING clauses.
Fix for ticket [66e4b0e271c47145].
FossilOrigin-Name: 69f9eb7343a416c5ab426c8e1b9f0ae576544b4ccc5d87f5481c8ff884f696e1
simulate I/O errors in calls to sqlite3BtreeNext(), and in OP_SeekScan.
FossilOrigin-Name: 29cca775d3f5411624f0a8d55d34a038a24f1009d25b097315adb64e70c4b299
to VdbeBranchTaken() so that the VdbeBranchTaken() attributes the branch
to the correct opcode.
FossilOrigin-Name: 61fbe7aa7cc0e8fe3e6b1c5aec277183d8cd7c86b1e835c38e0b37a9b8063343
