maropu commented on a change in pull request #31491:
URL: https://github.com/apache/spark/pull/31491#discussion_r573709268
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File path: docs/sql-migration-guide.md
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@@ -24,6 +24,8 @@ license: |
## Upgrading from Spark SQL 3.1 to 3.2
+ - Since Spark 3.2, all the supported JDBC dialects use StringType for ROWID.
In Spark 3.1 or earlier, Oracle dialect uses StringType and the other dialects
use LongType.
Review comment:
`dialects` is an internal word? If so, how about saying "Since Spark
3.2, \`java.sql.ROWID\` is mapped to \`StringType\` when reading data from
other databases via JDBC"?
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