completion support for non default schema

[aokiji]

As seen in #99 and #121 there is lack of support for completion when working with other schemas/databases other than the default schema/database. So this in the initial effort to fix this issue bringing support for:

• table completion when given the schema
• table description for table in any schema
• column completion when given table in any schema
• column completion for tables in any schema referenced in the join clause

Test were added so that the new features/changes are covered

[mattn]

Looks good.

[v2okimochi]

Any updates on this? I'd like to use it awesome feature.

[BotNikos]

Hello. Tried to build from [aokiji:feature/add-non-default-schema-support] branch, and completion for non-default schemas still not works (ಥ_ಥ)

[aokiji]

Hello. Tried to build from [aokiji:feature/add-non-default-schema-support] branch, and completion for non-default schemas still not works (ಥ_ಥ)

Built it recently and tested on a postgres database successfully, if you have a large database as was my case, you may need to include also changes from #147

[BotNikos]

Yeah, i was too fast with my conclusions, autocomplete works, but its behavior seem a little bit strange. For example when i type schema name - nothing happens, however if i try to type name of a table then completion let me choose from tables with similar names in all schemas in a database. Also completion don't works when i want to choose columns for output in select statement

example.mp4