Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1941#discussion_r63702355
--- Diff:
flink-batch-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/JDBCInputFormat.java
---
@@ -48,17 +49,53 @@
/**
* InputFormat to read data from a database and generate Rows.
* The InputFormat has to be configured using the supplied
InputFormatBuilder.
- *
- * In order to query the JDBC source in parallel, you need to provide a
parameterized
- * query template (i.e. a valid {@link PreparedStatement}) and a {@link
ParameterValuesProvider}
- * which provides binding values for the query parameters.
- *
+ * A valid RowTypeInfo must be properly configured in the builder, e.g.:
</br>
+ *
+ * <pre><code>
+ * TypeInformation<?>[] fieldTypes = new TypeInformation<?>[] {
+ * BasicTypeInfo.INT_TYPE_INFO,
+ * BasicTypeInfo.STRING_TYPE_INFO,
+ * BasicTypeInfo.STRING_TYPE_INFO,
+ * BasicTypeInfo.DOUBLE_TYPE_INFO,
+ * BasicTypeInfo.INT_TYPE_INFO
+ * };
+ *
+ * RowTypeInfo rowTypeInfo = new RowTypeInfo(fieldTypes);
+ *
+ * Serializable[][] queryParameters = new String[2][1];
--- End diff --
This should go into the next code block about parallel reading.
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