Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3409#discussion_r106026297
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/TableEnvironment.scala
---
@@ -353,19 +388,48 @@ abstract class TableEnvironment(val config:
TableConfig) {
* The table to scan must be registered in the [[TableEnvironment]]'s
catalog.
*
* @param tableName The name of the table to scan.
- * @throws ValidationException if no table is registered under the
given name.
+ * @throws TableException if no table is registered under the given
name.
* @return The scanned table.
*/
@throws[ValidationException]
def scan(tableName: String): Table = {
if (isRegistered(tableName)) {
- new Table(this, CatalogNode(tableName, getRowType(tableName)))
+ new Table(this, CatalogNode(getRowType(tableName), tableName))
} else {
throw new TableException(s"Table \'$tableName\' was not found in the
registry.")
}
}
/**
+ * Scans a table from registered external catalog and returns the
resulting [[Table]].
+ *
+ * @param catalogName The name of the catalog to look-up for the table.
+ * @param dbName The database name of the table to scan.
+ * @param tableName The table name to scan.
+ * @throws ExternalCatalogNotExistException if no catalog is registered
under the given name.
+ * @throws TableException if no database/ table is
found in the given catalog.
+ * @return The scanned table.
+ */
+ @throws[ExternalCatalogNotExistException]
+ @throws[TableException]
+ def scan(catalogName: String, dbName: String, tableName: String): Table
= {
+ if (this.externalCatalogs.contains(catalogName)) {
--- End diff --
This check can also be done by the `rootSchema`
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