Pavel Pereslegin created IGNITE-18699:
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Summary: Sql. Simplify colocation group implementation to better
fit current project concepts
Key: IGNITE-18699
URL: https://issues.apache.org/jira/browse/IGNITE-18699
Project: Ignite
Issue Type: Improvement
Components: sql
Reporter: Pavel Pereslegin
Currently {{ColocationGroup}} stores "assigments" in a "2-dimensional" list
(List of Lists).
Each element of which corresponds the partition number and stores nodes list
(assignment).
The first node in this list is the primary node (replica) for the partition.
Sql engine only works with the primary replica, so it seems that we can
simplify the implementation and replace the "2 dimensional" list with a simple
list with primary replicas.
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