[parser] parser : add support for octet_length function  (#401)
[parser] parser : add support for octet_length function  (#401)


c4pt0r/tidb,ngaut/tidb,c4pt0r/tidb,ngaut/tidb,kyle-wang/tidb,pingcap/tidb,kyle-wang/tidb,pingcap/tidb,kyle-wang/tidb,pingcap/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,c4pt0r/tidb,pingcap/tidb,coocood/tidb,ngaut/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,kyle-wang/tidb,c4pt0r/tidb,kyle-wang/tidb,ngaut/tidb,coocood/tidb,c4pt0r/tidb