pan3793 commented on code in PR #56688:
URL: https://github.com/apache/spark/pull/56688#discussion_r3457489315
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sql/connect/client/jdbc/src/main/scala/org/apache/spark/sql/connect/client/jdbc/SparkConnectDatabaseMetaData.scala:
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@@ -598,14 +598,51 @@ class SparkConnectDatabaseMetaData(conn:
SparkConnectConnection) extends Databas
catalog: String, schema: String, table: String): ResultSet =
throw new SQLFeatureNotSupportedException
- override def getPrimaryKeys(catalog: String, schema: String, table: String):
ResultSet =
- throw new SQLFeatureNotSupportedException
+ // Spark has no primary keys, so return an empty result set with the JDBC
schema
Review Comment:
oh, seems it does not have a public API to retrieve the table constraints in
a structured format using connect client. I guess we are facing the same issue
for other table info, e.g., `index`
cc @gengliangwang @cloud-fan, do you have any suggestions for this case? how
should we model such a public API?
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