ategy in Flink Table document 
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-19108'>FLINK-19108</a>] -         Stop expanding the identifiers with scope aliased by the system with &#39;EXPR$&#39; prefix
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-19109'>FLINK-19109</a>] -         Split Reader eats chained periodic watermarks
</li>
<li>[<a href='https://issues.apache.org/jira/browse/FLINK-19121'>FLINK-19121</a>] -         Avoid accessing HDFS frequently in HiveBulkWriter