emkornfield commented on code in PR #7504:
URL: https://github.com/apache/iceberg/pull/7504#discussion_r1186341567
##########
format/view-spec.md:
##########
@@ -328,3 +330,17 @@
s3://bucket/warehouse/default.db/event_agg/metadata/00002-(uuid).metadata.json
} ]
}
```
+
+## Appendix B: Well Known (canonical) dialects
+
+The following dialects names are reserved and indicate dialects for specific
systems:
+
+| Dialect Name | Description
| Versioning |
+|--------------|-------------------------------------------------------------------------------------------------------|-------------|
+|athena | [Amazon Athena
Dialect](https://docs.aws.amazon.com/athena/latest/ug/ddl-sql-reference.html)
| TBD |
+|google_sql | [Google's SQL
Dialect](https://cloud.google.com/bigquery/docs/reference/standard-sql/query-syntax)
| TBD |
+|spark | [Apache Spark SQL
Dialect](https://spark.apache.org/docs/latest/sql-ref-ansi-compliance.html)
| TBD |
+|trino | [Trino SQL
Dialect](https://trino.io/docs/current/language.html)
| TBD |
+
+Dialect names starting with "iceberg." are reserved for future extension. Well
known dialects
+may be added in the future with the prefix of "iceberg." (E.g.
"iceberg.new_dialect_name").
Review Comment:
It is likely an edge case, but this prevents dialect name conflicts for
people that choose a not already reserved dialect.
Another way of saying this is once the spec becomes official people are free
to use any non-reserved name, and ideally change in the OSS library should not
break those people if they follow the specification by not using a reserved
name.
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