clearTable is mainly used for clearing data between tests. In this case,
there are very few or zero records, and DELETE FROM is quicker than
TRUNCATE, which works by deleting and recreating the table.
This materially speeds up test execution, at least on MySQL.
Cherry-pick of SS3 ae9ab22a8f
clearTable is mainly used for clearing data between tests. In this case,
there are very few or zero records, and DELETE FROM is quicker than
TRUNCATE, which works by deleting and recreating the table.
This materially speeds up test execution, at least on MySQL.
Implemented in SS3 at 815da76b056a716c8831d22bbf93528912cbcb28
When exporting path to ~/.bash_profile the change do not take action before you reload the shell. Calling 'source ~/.bash_profile' executes the change.
If a session already exists, and Session::start() isn’t called until
after a large enough block of content is output, then headers_sent()
will be false. The previous code prevented the session from being
started in this case. That might makes sense for the creation of a new
session, but it prevent legitimate access to an existing session.
This mostly manifested when running debugging tools such as showqueries,
which may output content before the session is started.
* NEW: Add Hierarchy::prepopulate_numchildren_cache()
API: Hierarchy::stageChildren() customisations must be applied to the base class and not include record-specific behaviour.
Adds the ability to prepopulate the cache for Hierarchy::numChildren()
in a batch.
Note that this optimisation means that stageChildren() is not called on
each record in order to calculate numChildren(). This means that the
structure of the stageChildren() query must be the same for all records
and the behaviour cannot be customised only for a subclass of the base
data class. For example, apply your customisations to SiteTree and not
a subclass.
This is an useful part of optimising the query count on tree generation.
See https://github.com/silverstripe/silverstripe-framework/issues/8379
* NEW: Add Hierarchy::prepopulateTreeDataCache()
This provides a more extensible way of preopulating caches for optimised
tree generation.
Fixes https://github.com/silverstripe/silverstripe-framework/issues/8391
This variant of showqueries will include a backtrace after each query.
This is extremely verbose but can be helpful when diagnosing where
queries have come from.
This is something that I have frequently added as a local hack on my
environment, I figured that exposing it as a formal feature would be
useful.
