Item9166: System.QuerySearch and its meta maps: throw more errors, improve docs

An avid user of DBQUERY, trying to convert my apps to standard SEARCH, I wasted half an hour fiddling with a query that eventually ended up like this:

"parent='Foo'"

If I had read QuerySearch more carefully, I should have realised that parent in SEARCH is in fact a map rather than a string.

It should have been "parent.name='Foo'"

What needs to happen:

• Throw an (inline) error when trying to compare a map to a string
• Document this more clearly somehow, hopefully with more examples.

I am wondering a little about why we need a map representing the parent topic; it should be possible to point to metadata on the topic parent by using some sort of dereference syntax, Eg. 'parent'/info.version - DBQUERY uses something like @parent.info.version

-- PaulHarvey - 16 Jun 2010

The WaitingFor topic is [[%QUERY{"WaitingFor"}%]] at version No.  %QUERY{"'%QUERY{"WaitingFor"}%'/info.version"}%

The WaitingFor topic is [[]] at version No. 65

-- PaulHarvey - 16 Jun 2010

That's where I started in DBCacheContrib, resolving to a map. However it caused more confusion in the code, because it had to carry a lot of schema information around. By treating the META:TOPICPARENT object as a map (and the fields therein as strings) I was able to vastly simplify the code.

Regraded as Enhancement and confirmed.

-- CrawfordCurrie - 24 Jun 2010

Documentation component taken care of in Item9415

-- PaulHarvey - 01 Aug 2010

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