Github user beyond1920 commented on a diff in the pull request:
https://github.com/apache/flink/pull/3409#discussion_r107059962
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/java/BatchTableEnvironment.scala
---
@@ -178,4 +178,32 @@ class BatchTableEnvironment(
registerTableFunctionInternal[T](name, tf)
}
+
+ /**
+ * Scans a table from registered temporary tables and registered
catalogs.
+ *
+ * The table to scan must be registered in the TableEnvironment or
+ * must exist in registered catalog in the TableEnvironment.
+ *
+ * Example:
+ *
+ * to scan a registered temporary table
+ * {{{
+ * val tab: Table = tableEnv.scan("tableName")
+ * }}}
+ *
+ * to scan a table from a registered catalog
+ * {{{
+ * val tab: Table = tableEnv.scan("catalogName.dbName.tableName")
+ * }}}
+ *
+ * @param tablePath The path of the table to scan.
+ * @throws TableException if no table is found using the given table
path.
+ * @return The resulting [[Table]].
+ */
+ @throws[TableException]
+ def scan(tablePath: String): Table = {
--- End diff --
hi, @twalthr, there already existed scan method which is `def
scan(tableName: String)`, I added a scan method which is `def scan(catalogName:
String, dbName: String, tableName: String)` in first commit. Fabian suggest
that we could extend the previous scan(String) to accept varargs parameters.
And We would need to push the implementation to the Scala / Java versions of
BatchTableEnvironment and StreamTableEnvironment because varargs are handled
differently by Scala and Java. In this way, we could keep the API more concise
because we only need a single scan() method. I think it's a good idea, so I
updated the pr in the second commit. Maybe I'm confused something there. Any
advice? @fhueske, @twalthr .
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