Add plainto_tsquery_with_search_config

[eth3lbert]

This PR adds plainto_tsquery_with_search_config, which respects plainto_tsquery(config regconfig, query text ) → tsquery.

[DavisRayM]

Only question/concern here is that it looks oddly similar to to_tsquery here which also takes Text which I'm assuming is plain text here. They seem to be the same function to me ? Or am I missing something ?

[DavisRayM]

Actually, seems I was missing something; This seems related to the Postgres parsing function of the same name. Guessing this maps down to that parsing function ?

Seems the macro is deprecated; Still checking how this maps down but for now this looks good to me. 🚀 LGTM, maps down to the correct query

[weiznich]

Actually, seems I was missing something; This seems related to the Postgres parsing function of the same name.

The problem there is that rust does not allow function overloading, therefore we generate a different function for different sets of arguments and try to name them as close as possible to the original function name.

Seems the macro is deprecated; Still checking how this maps down but for now this looks good to me.

Just to clarify this a bit: The macro will be deprecated in the next minor diesel release. It will be replaced with the define_sql_function! macro that just structures the output a bit differently. The main motivation for this is to resolve certain to name resolution problems in the generated code.