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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/01/10 11:00:21 UTC

[GitHub] [arrow] paddyhoran commented on a change in pull request #9127: ARROW-11165: [Rust][DataFusion] Document Postgres as standard SQL dialect

paddyhoran commented on a change in pull request #9127:
URL: https://github.com/apache/arrow/pull/9127#discussion_r554549874



##########
File path: rust/datafusion/README.md
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@@ -91,6 +91,13 @@ This library currently supports the following SQL constructs:
 * `GROUP BY` together with one of the following aggregations: `MIN`, `MAX`, `COUNT`, `SUM`, `AVG`
 * `ORDER BY` together with an expression and optional `ASC` or `DESC` and also optional `NULLS FIRST` or `NULLS LAST`
 
+## Supported Functions
+
+DataFusion implements a subset of the [PostgreSQL SQL dialect](https://www.postgresql.org/docs/current/functions.html) where possible. We explicitly choose a single dialect to maximize interoperability with other tools and allow reuse of the PostgreSQL documents and tutorials as much as possible.
+
+Currently, only a subset of the PosgreSQL dialect is implemented, and we will document any deviations.

Review comment:
       Do we have a list or table somewhere that show what we currently support?




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