[development] Default to InnoDB

[Gerhard Killesreiter]

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Khalid Baheyeldin schrieb:
> The other place that could benefit from checking which engines are
> available is the temporary table query in db_query_temporary()
> 
> It now has:
> 
> $query = preg_replace('/^SELECT/i', 'CREATE TEMPORARY TABLE '.
> $tablename .' Engine=HEAP SELECT',
> 
> Would be great to check if HEAP (Memory) exists first before doing so.

According to the docs this is not neccessary as it will fall back to
MyISAM if HEAP (aka MEMORY) does not exist.

Offering _all_ MySQL db drivers for selection on install time is
probably not a good idea. Chosing HEAP will probably make your install a
very short lived one...

Cheers,
	Gerhard
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