Figure out job "fan out" and aggregation

[kyprifog]

Suppose you wanted to have a workflow that did:

table list

followed by

join (for each item listed)

followed by

summarize (for the joined table)

Figure out how this would be handled in terms of the fan out of the mason job scheduling and workflow handing.

                          +--------------+           +-----------------+
           +--------------+ table query  +---------- | table summarize +------------+
           |              +--------------+           +-----------------+            |
           |                                                                        |
           |                                                                        |
           |                                                                        |
           |              +--------------+           +-----------------+            |
           +--------------+ table query  +---------- | table summarize +------------+
           |              +--------------+           +-----------------+            |
           |                                                                  +-----+-----+            +-----+------+
+----------+---+                                                              |table join | ---------  |table dedupe|
| table list   |                                                              +-----+-----+            +-----+------+
+----------+---+           +-------------+           +-----------------+            |
           +---+-----------+table query  +---------- | table summarize +------------+
           |               +-------------+           +-----------------+            |
           |                                                                        |
           |                                                                        |
           |                                                                        |
           |              +--------------+          +------------------+            |
           +--------------+ table query  +----------+  table summarize +------------+
                          +--------------+          +------------------+

[kyprifog]

This seems unecessarily complex but its so that I can work through some of the issues that might arise in such a workflow