[sqlite] Work toward making the schema parsing logic simplier

[Zsbán Ambrus]

On 1/15/16, Domingo Alvarez Duarte <sqlite-mail at dev.dadbiz.es> wrote:
> Now that you are refactoring on the schema parsing could be nice if somehow
> sqlite3 expose the schema/sql parser for developers.

Note that sqlite3 already exposes most of the schema in a form
readable to an application.  The SQLITE_MASTER and SQLITE_TEMP_MASTER
tables give you the list of tables and views.  The PRAGMA table_info
statement gives information about a table or view; PRAGMA index_list
and PRAGMA index_info give information about indexes.

-- Ambrus