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50 check-ins using file configure version 481df2c6

2018-06-14
14:27
Improve comments and code legibility in new file window.c. check-in: bb915854 user: dan tags: exp-window-functions
2018-06-13
20:29
Fix problems with "RANGE BETWEEN CURRENT ROW AND UNBOUNDED FOLLOWING" window frames. check-in: c34f31db user: dan tags: exp-window-functions
2018-06-12
20:53
Fix another issue to do with window-functions in aggregate queries. check-in: 6413e38a user: dan tags: exp-window-functions
18:40
Fix some problems with using window-functions in aggregate queries. check-in: fe7081e0 user: dan tags: exp-window-functions
2018-06-11
20:50
Clarify the relationship between a Window object and its associated Expr. check-in: 0cd55e98 user: dan tags: exp-window-functions
18:16
Fix handling of window frames containing negative number of rows. e.g. "ROWS x PRECEDING AND y PRECEDING" where (x<y). check-in: b6d9c7ed user: dan tags: exp-window-functions
18:06
Fix the column cache invalidation logic in the code for ROWID uniqueness constraint checking in the INSERT command. This fixes ticket [c2432ef9089ee73bd]. check-in: 0b485a57 user: drh tags: trunk
17:35
Add the OP_SetTabCol and OP_VerifyTabCol opcodes, only when compiling with SQLITE_DEBUG, to do run-time verification of the column cache. check-in: b37614a3 user: drh tags: trunk
13:10
Strengthen the sqlite3VdbeMemAboutToChange() run-time verification mechanism to better detect missed calls to AboutToChange(). check-in: 793e9422 user: drh tags: trunk
11:19
Fix a typon in main.mk. check-in: e74f86f2 user: dan tags: exp-window-functions
01:30
Always initialize the WhereClause.hasOr field that was added by check-in [292724ffc4]. Error detected by OSSFuzz. check-in: 9faf4171 user: drh tags: trunk
2018-06-10
07:42
Update Makefile.msc to include window.c in the build. check-in: 16db7384 user: dan tags: exp-window-functions
2018-06-09
20:52
Fix a typo in the amalgamation autoconf file. check-in: de0857f3 user: drh tags: trunk
18:09
Merge recent trunk changes with this branch. check-in: c71f2359 user: dan tags: exp-window-functions
17:58
Update the amalgamation build script to include window.c. check-in: 21d2f4a6 user: dan tags: exp-window-functions
17:43
Add support for FILTER clause on aggregate window functions. check-in: ceaf798e user: dan tags: exp-window-functions
16:49
Slightly smaller and faster code by encapsulating wal-index hash table location information in a separate WalHashLoc object rather than passing around the various elements as separate variables. check-in: 538a365b user: drh tags: trunk
14:13
Improved comments an presentation for the recent IN operator decision improvement. check-in: 31e480f6 user: drh tags: trunk
02:49
Performance improvement to sqlite3WhereExprUsage(). check-in: fd093413 user: drh tags: trunk
01:12
Compute the bitmask of indexed columns for each index once when the Index objecct is constructed, instead of recomputing it every time it is needed. check-in: d735872e user: drh tags: trunk
00:09
Avoid invoking the whereLoopAddOr() routine in the query planner if there are no OR operators in the WHERE clause, thus speeding up query planning slightly. check-in: 292724ff user: drh tags: trunk
2018-06-08
23:23
When the query planner has the opportunity to use an IN operater constraint on a term of an index other than the left-most term, use the estimated number of elements on the right-hand side of the IN operator to determine if makes sense to use the IN operator with index lookups, or to just do a scan over the range of the table identified by the index terms to the left. Only do this if sqlite_stat1 measurements are available as otherwise the performance estimates will not be accurate enough to discern the best plan. Bias the decision slightly in favor of using index lookups on each element of the IN operator. check-in: 2cbbabdf user: drh tags: trunk
21:21
Only choose to scan an IN operator rather than use an index if we have real STAT1 data to suggest it is advantageous. Closed-Leaf check-in: 30e87466 user: drh tags: in-scan-vs-index
20:58
Add support for the WINDOW clause. check-in: 19c983b5 user: dan tags: exp-window-functions
19:54
Merge the btreeNext() assertion bug fix from trunk. check-in: 11bd66e0 user: drh tags: in-scan-vs-index
19:13
Fix an assert() that can be false for a corrupt database and a strange query that uses a recursive SQL function to delete content from a corrupt database file while it is being queried. check-in: 99057383 user: drh tags: trunk
18:22
Consider doing a partial table scan to fulfill an IN operator rather than using an index. Try to pick the plan with the lowest cost. check-in: 1fa40a78 user: drh tags: in-scan-vs-index
16:11
Do not flatten sub-queries that contain window functions. check-in: 236cb75b user: dan tags: exp-window-functions
11:45
Fixes to allow group_concat() to be used as a window function. check-in: 89bbc9ba user: dan tags: exp-window-functions
2018-06-07
20:35
Merge latest trunk changes with this branch. check-in: 25102203 user: dan tags: exp-window-functions
18:13
The IN-early-out optimization: When doing a look-up on a multi-column index and an IN operator is used on a column other than the left-most column, then if no rows match against the first IN value, check to make sure there exist rows that match the columns to the right before continuing with the next IN value. check-in: 09fffbdf user: drh tags: trunk
18:01
Fix the assert()s in the byte-code engine that prove that cursors are unidirectional. Closed-Leaf check-in: 4b0b4e14 user: drh tags: multikey-opt-idea
17:32
Remove the NextIfOpen and PrevIfOpen opcodes which are no longer needed when the IN-early-out optimization is working. check-in: 439c8162 user: drh tags: multikey-opt-idea
16:07
Test cases. check-in: 085e8637 user: drh tags: multikey-opt-idea
15:28
Merge the ".stat/.eqp" CLI fix from trunk. check-in: a91cad33 user: drh tags: multikey-opt-idea
15:23
Avoid using a prepared statement for ".stats on" after it has been closed by the ".eqp full" logic. Fix for ticket [7be932dfa60a8a6b3b26bcf76]. check-in: bb87c054 user: drh tags: trunk
14:59
Add the WHERE_IN_EARLYOUT flag and use it to clarify the logic of this optimization. check-in: 522f1eac user: drh tags: multikey-opt-idea
14:32
Merge recent trunk enhancements. check-in: e9d7bf4f user: drh tags: multikey-opt-idea
2018-06-06
23:31
Change a comma into a logically equivalent but semantically clearer semicolon. check-in: 71f97f0f user: drh tags: trunk
20:55
More space and performance enhancements to sqlite3VdbeRecordCompare(). check-in: 83a60ff0 user: drh tags: trunk
20:29
Small performance optimization in sqlite3VdbeRecordCompareWithSkip() for the common case where the comparison is equal. check-in: 1e616e25 user: drh tags: trunk
19:48
Rearrange the order of some checks in the integrity_check pragma for a very slight performance gain. check-in: 4b853f02 user: drh tags: trunk
18:50
Fix the sqlite3BeginTrans() calls within the snapshot extension. check-in: 1fef7ad2 user: drh tags: trunk
17:45
Another minor optimization to OP_Transaction. check-in: d80077ae user: drh tags: trunk
17:12
Merge the 3.24.0 changes plus a few subsequent enhancements. check-in: be7004a9 user: drh tags: begin-concurrent-pnu
17:03
Merge changes from trunk, including all the 3.24.0 changes plus some later enhancements. check-in: d7299bfe user: drh tags: begin-concurrent
16:28
Change sqlite3BtreeBeginTrans() to return the BTREE_SCHEMA_COOKIE, for a small speed improvement when starting new transactions. check-in: a10662aa user: drh tags: trunk
01:18
Fix the ".archive" command in the CLI (and the corresponding -A command-line option) so that it silently ignores filenames that contain "../" in their names. This prevents the "Zip Slip" attack. check-in: 27291f2d user: drh tags: trunk
00:36
Attempt to optimize the resolveExprStep() routine by mapping Expr opcodes into a subset of opcodes that resolveExprStep() cares about and only calling the routine when those opcodes are encountered. Is slightly faster, but it seems like the very slight performance bump is not worth the added complexity. Saved on a dead-end branch for historical reference. Closed-Leaf check-in: bad4d7a0 user: drh tags: dead-end
2018-06-05
23:51
Update the version number to 3.25.0 for the next development cycle. check-in: 7598236c user: drh tags: trunk