[WIP] KevaQL

[tuhuynh27]

Naive KQL

KQL supports:

• CREATE TABLE
• DROP TABLE
• INSERT
• UPDATE
• DELETE
• SELECT
• AND, OR
• EQUAL, NOT EQUAL
• MIN, MAX
• COUNT, AVG, SUM
• NULL VALUES
• GROUP BY
• OFFSET
• LIMIT

[haphananhtuan]

Question: Are we going to process queries in single thread manner? If yes then we can change Map implementation to improve performance.
Ex: HashMap offer a better performance than ConcurrentHashMap in single thread
https://stackoverflow.com/questions/1378310/performance-concurrenthashmap-vs-hashmap

[tuhuynh27]

@haphananhtuan Thanks for pointing out the issue, I've just changed to use kevaDatabase, it will be persisted along with kdb.dump

[axblueblader]

Nice work, also update docs on design decision when got time

[tuhuynh27]

Still cannot be merged now, the visitor class is cursed