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[FLINK-6924] ADD LOG(X) supported in TableAPI - Flink - [issue]
...See FLINK-6891 for detail....    Author: sunjincheng , 2018-04-17, 19:59
[FLINK-6979] Add documentation for Aggregation Functions in Tables/UDF doc - Flink - [issue]
...The User-defined Functions documentation is currently lacking a description of Aggregation Functions.The page has a placeholder section with a TODO: ./docs/dev/table/    Author: sunjincheng , 2018-03-15, 10:18
[FLINK-7572] Improve TableSchema ValidationException message. - Flink - [issue]
...When sql is very complicated(e.g.: more than 100+ tables), the following exception information is very confusing:org.apache.flink.table.api.TableException: Table column names must be unique....    Author: sunjincheng , 2018-03-12, 15:38
[FLINK-6428] Add support DISTINCT in dataStream SQL - Flink - [issue]
...Add support DISTINCT in dataStream SQL as follow:DATA:(name, age)(kevin, 28),(sunny, 6),(jack, 6)SQL:SELECT DISTINCT age FROM MyTable"RESULTS:28, 6To DataStream:inputDS  .keyBy() // Key...    Author: sunjincheng , 2018-02-09, 13:45
[FLINK-6973] Add L/RPAD supported in TableAPI - Flink - [issue]
...See FLINK-6892 for detail....    Author: sunjincheng , 2018-01-24, 10:48
[FLINK-6892] Add L/RPAD supported in SQL - Flink - [issue]
...L/RPAD(str,len,padstr) Returns the string str, left/right-padded with the string padstr to a length of len characters. If str is longer than len, the return value is shortened to len charact...    Author: sunjincheng , 2018-01-24, 10:48
[FLINK-8325] Add COUNT AGG support constant parameter, i.e. COUNT(*), COUNT(1) - Flink - [issue]
...COUNT(1) with Group Window, always output 0. e.g.DATA:val data = List(    (1L, 1, "Hi"),    (2L, 2, "Hello"),    (4L, 2, "Hello"),    (8L, 3, "Hello w...    Author: sunjincheng , 2018-01-21, 09:15
[FLINK-8355] DataSet Should not union a NULL row for AGG without GROUP BY clause. - Flink - [issue]
...Currently DataSetAggregateWithNullValuesRule will UINON a NULL row for  non grouped aggregate query. when CountAggFunction support COUNT(FLINK-8325).  the result will incorrect.for...    Author: sunjincheng , 2018-01-19, 22:14
[FLINK-6813] Add TIMESTAMPDIFF supported in SQL - Flink - [issue]
...TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2) Returns datetime_expr2 − datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. One expression may be a d...    Author: sunjincheng , 2018-01-15, 12:30
[CALCITE-2126]  Optimization of COUNT (1) in OVER window - Calcite - [issue]
...When we parse a SQL:select COUNT(1) from T tumble(rowtime, interval 2 seconds) In RexBuild.addAggCall will do the optimize as follows:if(aggCall.getAggregation() instanceof SqlCountAggF...    Author: sunjincheng , 2018-01-10, 20:42