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26 check-ins using file src/pager.c version 6f2ae58c

2017-08-18
16:09
For the unix VFS, avoid an unnecessary stat() system call prior to opening any file in the common case where there are no unused file descriptors. (check-in: 3075cfa0 user: drh tags: trunk)
14:34
Combine the OP_CreateTable and OP_CreateIndex opcodes of the bytecode engine into a single OP_CreateBtree opcode. This simplifies the implementation and makes the bytecode programs clearer. (check-in: eb1202b5 user: drh tags: trunk)
08:29
Only use indexes on expressions to optimize ORDER BY and GROUP BY if the collation sequence matches. Possible fix for [e20dd54a]. (check-in: 37e19008 user: dan tags: trunk)
2017-08-17
20:53
Use the __builtin_clzll() function of gcc to improve the performance and reduce the size of the sqlite3LogEst() routine. (check-in: a42a438c user: drh tags: trunk)
19:23
Small optimization in the Expr tree walker. (check-in: 264a5e1b user: drh tags: trunk)
18:54
Size optimization in the authorizer error message generation logic. (check-in: 0367a4d5 user: drh tags: trunk)
18:23
In sqlite3ViewGetColumnNames(), return the number of errors, not an error code. (check-in: f13682ea user: drh tags: trunk)
18:17
The RTREE extension should return SQLITE_CORRUPT_VTAB, not just SQLITE_CORRUPT when it encounters incorrectly formatted shadow tables. (check-in: 0712f057 user: drh tags: trunk)
14:47
Remove an unnecessary branch from the [be436a7f4587ce517ddc] fix. (check-in: fb6ca99b user: drh tags: trunk)
14:12
Add test cases for ticket [be436a7f4587ce517] using virtual table modules fts5 and rtree. (check-in: 2101b420 user: dan tags: trunk)
02:26
Defer schema resets when the query planner is running. Proposed fix for ticket [be436a7f4587ce517]. (check-in: a7bc7752 user: drh tags: trunk)
2017-08-16
19:20
Avoid a test for CURTYPE_BTREE in sqlite3VdbeCursorMoveto() in order to reduce the size and improve the performance of OP_Column. (check-in: f078deb2 user: drh tags: trunk)
14:16
Remove an unnecessary local variable from OP_Column, for a small size reduction and performance increase. (check-in: 39543903 user: drh tags: trunk)
11:04
Performance improvement in the OP_Column opcode. (check-in: dc98a92f user: drh tags: trunk)
2017-08-15
14:14
Small size and performance improvement in the OP_Column opcode. (check-in: 2cf3f3de user: drh tags: trunk)
03:46
Btree optimization: New field BtCursor.pPage that points to the current page, saving a single pointer dereference on each access. (check-in: 373b71d1 user: drh tags: trunk)
2017-08-14
23:53
Minor size and performance optimization to sqlite3BtreeCloseCursor(). (check-in: 16969338 user: drh tags: trunk)
18:13
Change the internal btree routine moveToRoot() to return SQLITE_EMPTY if the table is empty or if it has pgnoRoot==0. This simplifies the callers, making them smaller and faster. The SQLITE_EMPTY result code is intercepted and changed into SQLITE_OK before surfacing in an API. (check-in: 240d5714 user: drh tags: trunk)
17:03
Fix harmless indentation error. (check-in: 25e92baa user: drh tags: trunk)
14:53
Sometimes a TK_COLUMN Expr node can have Expr.pTab==0 if it is a reference to an expression column in an index on an expression. Fix for ticket [aa98619ad08ddcab]. (check-in: d0da791b user: drh tags: trunk)
01:33
Properly dequote column names in tables constructed by an aggregate SELECT. (check-in: 7e0d3e9c user: drh tags: trunk)
2017-08-12
18:31
Add new test file fts5vocab2.test. (check-in: 02174842 user: dan tags: trunk)
02:16
Update the speed-check.sh test script to append log output to the end of the cout-NAME.txt file. (check-in: 14d262d6 user: drh tags: trunk)
02:01
Remove the zBase field from the StrAccum object. Resulting code is slightly smaller and faster. (check-in: 6e52fa5f user: drh tags: trunk)
01:09
Size and performance micro-optimization on sqlite3SrcListIndexedBy(). (check-in: 28a5aec1 user: drh tags: trunk)
2017-08-11
18:59
Fix compiler warnings that arise if the PAGERTRACE macro is turned on. This changes does not affect production builds. (check-in: 831156a4 user: drh tags: trunk)