Vladimir Ozerov created IGNITE-11203:
----------------------------------------
Summary: SQL: global refactoring
Key: IGNITE-11203
URL: https://issues.apache.org/jira/browse/IGNITE-11203
Project: Ignite
Issue Type: Task
Components: sql
Reporter: Vladimir Ozerov
Assignee: Vladimir Ozerov
Over the years of existence SQL business logic became overly complex as we
never invested enough time into technical debt. Most prominent features that
led to over-complication are:
# Distributed joins
# Subqueries in spliiter
# MVCC
# Query cancel feature
# DML
As a result currently it is too difficult to add new features to the product:
we have to spend a lot time figuring what if going on, and loose a lot on
introduced bugs.
General idea of this initiative is to streamline query execution engine as much
as possible. The most important things to consider:
# Simplify H2 connection management: simple pooling, avoid exposing connection
when possible
# Execute MAP and LOCAL queries through the same flow
# Avoid zig-zag code flow in DML stuff
# Try to merge partition pruning and distributed join cost calculation
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
