LuciferYang commented on code in PR #52819:
URL: https://github.com/apache/spark/pull/52819#discussion_r2510693110
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sql/connect/client/jdbc/src/main/scala/org/apache/spark/sql/connect/client/jdbc/SparkConnectDatabaseMetaData.scala:
##########
@@ -299,11 +304,60 @@ class SparkConnectDatabaseMetaData(conn:
SparkConnectConnection) extends Databas
new SparkConnectResultSet(df.collectResult())
}
- override def getSchemas: ResultSet =
- throw new SQLFeatureNotSupportedException
+ override def getSchemas: ResultSet = {
+ conn.checkOpen()
- override def getSchemas(catalog: String, schemaPattern: String): ResultSet =
- throw new SQLFeatureNotSupportedException
+ getSchemas(null, null)
+ }
+
+ // Schema of the returned DataFrame is:
+ // |-- TABLE_SCHEM: string (nullable = false)
+ // |-- TABLE_CATALOG: string (nullable = false)
+ private def getSchemasDataFrame(
+ catalog: String, schemaPattern: String): connect.DataFrame = {
+
+ val schemaFilterClause = if (isNullOrWildcard(schemaPattern)) {
Review Comment:
how about
```
val schemaFilter = if (isNullOrWildcard(schemaPattern)) {
lit(true)
} else {
col("TABLE_SCHEM").like(schemaPattern)
}
```
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