QueryResult inconsistency

[JeroenDeDauw]

Is retuning object for MW implementation and array for the PDO one

[JeroenDeDauw]

See wmde/WikibaseQueryEngine#12

[JeroenDeDauw]

PDO and DBAL return associative arrays, while MediaWiki returns objects. When using PDO or DBAL, one can specify to use objects instead, but the MW ResultWrapper class has no such option. (This can however be added easily.) QueryEngine expects associative arrays at present.

We can

• Add the option to ResultWrapper
• Wrap ResultWrapper in a new Iterator
• Tell DBAL to return objects and modify QueryEngine usage

[frimelle]

Task on Phabricator: https://phabricator.wikimedia.org/T87746