sqlite3IsLikeFunction() that was made unreachable by this enhancement.
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is 31 or greater. [forum:/forumpost/e807885dc5|forum post e807885dc5].
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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.
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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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Actually making this work, though, will involve a lot more code which will
likely slow down processing for the common case where there is no
RETURNING clause. Furthermore, RETURNING seems to be of limited usefulness
and it is not standard SQL. So we abandon it here. These experimental
changes are parked in a branch as an historical reference. If circumstances
changes, we might take up the cause again some day.
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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.
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step count only, after each command. Useful for optimization problems.
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intrinsics. See
[forum:/forumpost/fc0237a39b30ac0a|forum post fc0237a39b30ac0a].
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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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by linking the new prepared statement into the prepared statement list sooner
rather than later.
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output rw to merge with whatever row followed. Problem reported in
[forum:/forumpost/aacac97680|forum post aacac97680].
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drh