Bugfix for Schema Change: Support for Relations and Objects

No source files or tests are named. Start by locating the schema-change handling and the relation/object XML serialization in the Python library, then reproduce the documented XML variations. Done means schema changes propagate to the connection, both legacy and current relation forms, and nested relation objects.

We are seeing the Documents API 0.10 change the Schema within the connection control (in Tableau Desktop, the grey connection pane and in XML, the connection layer), but we are not seeing this change propagate the relations and object (the "wrapper" for the noodle and the enclosed table in Desktop on the white data canvas or the relation connection and objects within XML (snippet to follow in comment). Without all 4 (1 connection control, 2 relations (true and false) and object) changes, the schema will not deploy.

Connection:

<connection authentication='Username Password' class='redacted' dbname='DB' odbc-connect-string-extras='' one-time-sql='' schema='CHANGE_SCHEMA_HERE' server='redacted' server-oauth='' service='' username='UN' warehouse='WH' workgroup-auth-mode='prompt' />

Relations (for both current and prior version compatibility)

<_.fcp.ObjectModelEncapsulateLegacy.false...relation connection='redacted' name='TABLE' table='[CHANGE_SCHEMA_HERE].[TABLE]' type='table' />
<_.fcp.ObjectModelEncapsulateLegacy.true...relation connection='redacted' name='TABLE' table='[CHANGE_SCHEMA_HERE].[TABLE]' type='table' />
        <refresh increment-key='' incremental-updates='false' />

Object

<relation connection='redacted' name='TABLE' table='[CHANGE_SCHEMA_HERE].[TABLE]' type='table' />

Variations
When using a relation, the tags are further nested in the XML under a collection type:

<_.fcp.ObjectModelEncapsulateLegacy.true...relation type='collection'>
          <relation connection='redacted' name='TABLE' table='[CHANGE_SCHEMA_HERE].[TABLE]' type='table' />
          <relation connection='REDACTED' name='TABLE_2' table='[CHANGE_SCHEMA_HERE].[TABLE_2]' type='table' />