If more than two $from were added through SQLQuery->addFrom(),
the getOrderedJoins() comparison kicks in. It assumes all $from
parts are in array notation, which isn't always the case.
For legacy reasons, and because we don't have full API support,
you can still add literal joins through addFrom('INNER JOIN ...').
On PHP 5.3, the ordering comparison still works because it
allows array access in strings, with string rather than numeric indexes.
Thankfully that's no longer supported in PHP 5.4.
DataQuery::initialiseQuery() will add a default sort to a query,
and when calling up an aggregate it will make a query like this
which doesn't make sense:
SELECT MAX("LastEdited") FROM "Member" ORDER BY "ID"
In this case there is no need to add the ORDER BY, and it will
break databases like MSSQL in cases such as
GenericTemplateGlobalProvider
which provides a default List() function for adding aggregates
into SSViewer template cacheblocks.
If we add a limit, however, then it does make sense:
SELECT MAX("LastEdited") FROM "Member" ORDER BY "ID" LIMIT 10
This fixes SQLQuery::aggregate() to NOT add an ORDER BY to an
aggregate call if there is no limit.
SQLQuery->setLimit(0, 99) should result in "SELECT ... LIMIT 0 OFFSET 1".
In fact it does "SELECT ..." without a LIMIT clause at all,
which is unexpected. This is regardless of the $offset value.
This bug will surface when using the ORM and adding an join to DataList
where a DataObject inherits another DataObject.
If you for example want to restrict the number of pages that only have a
related Staff object:
$list = DataList::create('Page')
->InnerJoin('Staff', '"Staff"."ID" = "Page"."StaffID");
This will create a SQL query where the INNER JOIN is before the
LEFT JOIN of Page and SiteTree in the resulting SQL string. In MySQL
and PostgreSQL this will create an invalid query.
This patch solves the problem by sorting the joins.
Quoted table / column names to make test cases work in postgres
BUG Fixed issue with SQLQuery::lastRow crashing on empty set. Added test cases for lastRow and firstRow.
Quoted table / column names to make test cases work in postgres
Merge branch '3.0-sqlquery-lastrow-fix' of github.com:tractorcow/sapphire into 3.0-sqlquery-lastrow-fix
The entire framework repo (with the exception of system-generated files) has been amended to respect the 120c line-length limit. This is in preparation for the enforcement of this rule with PHP_CodeSniffer.
The table name in the join was being escaped, though table
names aren't escaped anywhere else. This breaks
namespaced classes, which rely on unescaped backslashes.
This bug was caused by the fact that SQLQuery::whereAny() removed existing filters. In line with addWhere() and setWhere(), I split this into addWhereAny() and setWhereAny(). Strictly speaking, this drops the method SQLQuery::whereAny(), but it was really just an internal function for exclude, and so I think that's acceptable.
---
The primary goal of this branch was to fix the sort bugs in AssetAdmin, however, it started a bit of a yak shave in that the API around SQLQuery was poor. The biggest change that this pull request makes is it changes the format of SQLQuery::$select to contain aliases as array keys (and consistently puts the "implicit alias" in there to assist with various query generation logic), but it also makes a bunch of changes to avoid direct access of that property.
API CHANGE: Deprecated SS_List::getRange() in favour of SS_Limitable::limit().
API CHANGE: Introduce SS_Limitable::limit($limit, $offset = 0) as the only modern way of specifying limits; deprecate all others.
