use structured queries

[thomas-topway-it]

-- considers this #942

-- fixes #910

-- uses structured queries instead of raw joins in the from clause

[alistair3149]

Merging it to a separate branch for testing

[thomas-topway-it]

@alistair3149 I've found out there is an issue with the method parseQuerySegment, sometimes joinConditions and/or fromTables are empty in the root segment. I've found a better solution emulating QuerySegmentListProcessor, and keeping the structured queries, I was about to complete it

[alistair3149]

@alistair3149 I've found out there is an issue with the method parseQuerySegment, sometimes joinConditions and/or fromTables are empty in the root segment. I've found a better solution emulating QuerySegmentListProcessor, and keeping the structured queries, I was about to complete it

Would you be able to merge them into feat-datatables-searchpanes-structured-queries please? If the change is a complete rewrite, then please let me know and I will remove the branch.

In that way we can keep the branch available on Packagist for easier testing and cleanups.

[thomas-topway-it]

@alistair3149 done -- I wanted to test also here https://fina.knowledge.wiki/Test_Datatables but there is some other issue.
After testing, I have a better idea how to use the QuerySegmentListProcessor, but the functionality will be the same