Sasha Krassovsky created ARROW-17837:
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Summary: [C++] Create ExecPlan-owned QueryContext that will store
a plan's shared data structures
Key: ARROW-17837
URL: https://issues.apache.org/jira/browse/ARROW-17837
Project: Apache Arrow
Issue Type: Improvement
Reporter: Sasha Krassovsky
Assignee: Sasha Krassovsky
As we begin to include more and more plan-global stuff (such as Scheduler,
AsyncScheduler, IOScheduler, ExecContext), ExecPlan's definition is becoming
cluttered. ExecPlan should store and organize nodes, and store these structures
elsewhere. We thus introduce QueryContext which will store any information
related to the currently executing plan.
An added bonus is that now more components can be decoupled from ExecPlan and
rely only on QueryContext (useful for e.g. testing, or just reusing a component
in a non-ExecPlan context).
Also, this QueryContext can introduce options for the query such as maximum
memory used and this legacy batching thingy.
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