involve vector comparisons, instead of throwing a mysterious error in those
cases.
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common case where the EXISTS operator is not found in the WHERE clause.
FossilOrigin-Name: dcb7772d7695ddbc0fe89e06c07ff4a6ae4fa05de914e2ec10b5cc07a62ed49f
regression introduced at [b8ba2f17f938c035] reported by
[forum:/forumpost/4050026ab8|forum post 4050026ab8]
FossilOrigin-Name: 249a71cc6822d6bdd5bb9e727aac81c6549693b418e9c0987b96850ee332c940
aggressive for the cases where there is a join and outer loops contain
IN operators. Fix this. Test case in TH3.
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the new bits to disable the min/max optimization, so that we can more easily
verify that we get the same answer both with and within that optimization.
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[/info/b8ba2f17f938c035|check-in b8ba2f17f938c035] to fix the performance
regression identified by
[forum:/forumpost/623f571482|forum post 623f571482].
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and add a mechanism to detect situations where this might occur in the
future.
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use that list as a place to put other sub-objects that need to be deallocated.
Have a single such list for infrequently used sub-objects is more efficient
than doing an a separate check for each kind of sub-object.
FossilOrigin-Name: affa2b7b316941b8a6c4d0d1ff212c81a593faf1d05d129e14d2b70d73a25c59
step count only, after each command. Useful for optimization problems.
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intrinsics. See
[forum:/forumpost/fc0237a39b30ac0a|forum post fc0237a39b30ac0a].
FossilOrigin-Name: 5204c2c4a7b73a64764b0d2d1d7c53709bb64e0d2685a829c7bf31af13bab5e7
yy_reduce() subroutine and into the main parser routine, so that when overflow
is detected, it can exit immediately. This saves a single conditional in
the main loop of the parser.
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when parsing the schema of an existing database, since those prepared
statements are never used.. This helps to make startup faster,
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This makes the query that implements ALTER TABLE ADD COLUMN more complex and
slightly slower, but also makes CREATE TABLE statement parsing faster by
avoiding a call to sqlite3UtfCharLen(). Since, CREATE TABLE parsing is far
more common than ALTER TABLE, this is a net win for performance.
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-Os and -DSQLITE_THREADSAFE=0 and no other options, for consistency of
performance.
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by linking the new prepared statement into the prepared statement list sooner
rather than later.
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