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add sql limitation #2

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merged 1 commit into from
May 14, 2020

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penghuo
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@penghuo penghuo commented May 13, 2020

Issue #, if available:

Description of changes:
Add SQL Limitation section.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

## Join doesn't support aggregation on Joined result.
The Join doesn't support aggregation on the joined result. e.g. `SELECT depo.name, avg(empo.age) FROM empo JOIN depo WHERE empo.id == depo.id GROUP BY depo.name` is not supported. [Issue 110](https://github.com/opendistro-for-elasticsearch/sql/issues/110).

## Pagination

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Can we change this to Cursor, we are using that elsewhere.

The Join doesn't support aggregation on the joined result. e.g. `SELECT depo.name, avg(empo.age) FROM empo JOIN depo WHERE empo.id == depo.id GROUP BY depo.name` is not supported. [Issue 110](https://github.com/opendistro-for-elasticsearch/sql/issues/110).

## Pagination
The pagination query enable user to get the paginated respones. Currently, the pagination only support basic query. e.g. The following query will return the data with cursor id.

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Same here.

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can you also list some scalability concerns and mention the exception name if the joins timeout.

@ashwinkumar12345 ashwinkumar12345 merged commit 7ab8304 into ashwinkumar12345:sql_ui May 14, 2020
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4 participants