Discuss [FLINK-9740] Support group windows over intervals of months

hi Timo Walther?? I have redesigned and sorted it out. Please find the details in the attachment and I also added it to jira. https://issues.apache.org/jira/browse/FLINK-9740 thanks qianjin

Discuss about [FLINK-10134] UTF-16 support for TextInputFormat bug fixed

dear everyone, I hope to discuss this jira with everyone in order to handle this matter better. Here are some of my thoughts: 1.Where should the BOM be read? I think that when the file is started at the beginning of the file, you still need to increase the logic for proces