Hi：
图片的内容没展示出来，图片的内容就是个查询结果，
error日志这是batch模式的debug日志：
2020-07-14 18:33:23,180 DEBUG
org.apache.flink.connector.jdbc.table.JdbcRowDataInputFormat [] - No input
splitting configured (data will be read with parallelism 1).
2020-07-14 18:33:23,181 DEBUG org.apache.calcite.sql2rel
[] - Plan after converting SqlNode to RelNode
LogicalProject(money=[$0])
LogicalTableScan(table=[[mydb, test, test2]])
2020-07-14 18:33:23,197 DEBUG
org.apache.flink.connector.jdbc.table.JdbcRowDataInputFormat [] - No input
splitting configured (data will be read with parallelism 1).
2020-07-14 18:33:23,198 DEBUG org.apache.calcite.sql2rel
[] - Plan after converting SqlNode to RelNode
LogicalProject(money=[$0])
LogicalTableScan(table=[[mydb, test, test2]])
2020-07-14 18:33:23,201 DEBUG
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram [] -
iteration: 1
2020-07-14 18:33:23,202 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using
rel#2907:LogicalLegacySink.NONE.any.[](input=HepRelVertex#2906,name=`mydb`.`test`.`_tmp_table_380133308`,fields=money)
2020-07-14 18:33:23,202 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using
rel#2905:LogicalProject.NONE.any.[](input=HepRelVertex#2904,inputs=0)
2020-07-14 18:33:23,202 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using
rel#2901:LogicalTableScan.NONE.any.[](table=[mydb, test, test2])
2020-07-14 18:33:23,202 DEBUG
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram [] -
optimize convert table references before rewriting sub-queries to semi-join
cost 1 ms.
optimize result:
LogicalLegacySink(name=[`mydb`.`test`.`_tmp_table_380133308`], fields=[money])
+- LogicalProject(money=[$0])
+- LogicalTableScan(table=[[mydb, test, test2]])
2020-07-14 18:33:23,202 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using
rel#2912:LogicalLegacySink.NONE.any.[](input=HepRelVertex#2911,name=`mydb`.`test`.`_tmp_table_380133308`,fields=money)
2020-07-14 18:33:23,202 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using
rel#2910:LogicalProject.NONE.any.[](input=HepRelVertex#2909,inputs=0)
2020-07-14 18:33:23,202 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using
rel#2901:LogicalTableScan.NONE.any.[](table=[mydb, test, test2])
2020-07-14 18:33:23,202 DEBUG
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram [] -
optimize rewrite sub-queries to semi-join cost 0 ms.
optimize result:
LogicalLegacySink(name=[`mydb`.`test`.`_tmp_table_380133308`], fields=[money])
+- LogicalProject(money=[$0])
+- LogicalTableScan(table=[[mydb, test, test2]])
这是streaming模式的debug日志：
2020-07-14 18:35:45,995 DEBUG org.apache.calcite.sql2rel
[] - Plan after converting SqlNode to RelNode
LogicalProject(money=[$0])
LogicalTableScan(table=[[mydb, test, test2]])
2020-07-14 18:35:46,015 DEBUG org.apache.calcite.sql2rel
[] - Plan after converting SqlNode to RelNode
LogicalProject(money=[$0])
LogicalTableScan(table=[[mydb, test, test2]])
2020-07-14 18:35:46,016 DEBUG org.apache.flink.runtime.net.ConnectionUtils
[] - Trying to connect to (mosh-data-1/192.168.0.29:6123) from local
address mosh-data-1/192.168.0.29 with timeout 200
2020-07-14 18:35:46,016 DEBUG org.apache.flink.runtime.net.ConnectionUtils
[] - Using InetAddress.getLocalHost() immediately for the connecting
address
2020-07-14 18:35:46,022 DEBUG
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram [] -
iteration: 1
2020-07-14 18:35:46,022 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using rel#3047:LogicalLegacySink.NONE.any.None:
0.[NONE].[NONE](input=HepRelVertex#3046,name=`mydb`.`test`.`_tmp_table_380133308`,fields=money)
2020-07-14 18:35:46,022 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using rel#3045:LogicalProject.NONE.any.None:
0.[NONE].[NONE](input=HepRelVertex#3044,exprs=[CAST($0):DECIMAL(38, 18)])
2020-07-14 18:35:46,022 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using rel#3040:LogicalTableScan.NONE.any.None:
0.[NONE].[NONE](table=[mydb, test, test2])
2020-07-14 18:35:46,022 DEBUG
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram [] -
optimize convert table references before rewriting sub-queries to semi-join
cost 0 ms.
optimize result:
LogicalLegacySink(name=[`mydb`.`test`.`_tmp_table_380133308`], fields=[money])
+- LogicalProject(money=[CAST($0):DECIMAL(38, 18)])
+- LogicalTableScan(table=[[mydb, test, test2]])
2020-07-14 18:35:46,023 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using rel#3052:LogicalLegacySink.NONE.any.None:
0.[NONE].[NONE](input=HepRelVertex#3051,name=`mydb`.`test`.`_tmp_table_380133308`,fields=money)
2020-07-14 18:35:46,023 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using rel#3050:LogicalProject.NONE.any.None:
0.[NONE].[NONE](input=HepRelVertex#3049,exprs=[CAST($0):DECIMAL(38, 18)])
2020-07-14 18:35:46,023 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using rel#3040:LogicalTableScan.NONE.any.None:
0.[NONE].[NONE](table=[mydb, test, test2])
2020-07-14 18:35:46,023 DEBUG
org.apache.flink.table.planner.plan.optimize.program.FlinkGroupProgram [] -
optimize rewrite sub-queries to semi-join cost 1 ms.
optimize result:
LogicalLegacySink(name=[`mydb`.`test`.`_tmp_table_380133308`], fields=[money])
+- LogicalProject(money=[CAST($0):DECIMAL(38, 18)])
+- LogicalTableScan(table=[[mydb, test, test2]])
主要区别就是streaming模式下：
2020-07-14 18:35:46,022 DEBUG org.apache.calcite.plan.RelOptPlanner
[] - For final plan, using rel#3045:LogicalProject.NONE.any.None:
0.[NONE].[NONE](input=HepRelVertex#3044,exprs=[CAST($0):DECIMAL(38, 18)])
--
Best，
wldd
在 2020-07-14 18:31:33，"Leonard Xu" <[email protected]> 写道：
>Hi,
>
>前面邮件图都挂了，理论上 SQL Client 都是会强转的，可以发个图床链接上或者贴下可以复现的代码吗？
>
>祝好
>
>> 在 2020年7月14日，18:21，wldd <[email protected]> 写道：
>>
>> Hi，
>> batch模式用的不是用的legacy 的数据类型么，batch模式并没有对decimal进行强转
>>
>>
>>
>>
>>
>> --
>> Best，
>> wldd
>>
>>
>> 在 2020-07-14 18:08:41，"Leonard Xu" <[email protected]> 写道：
>> >Hi,
>> >
>> >SQL client 读取mysql的部分想当于一个connector, 这个connector只支持
>> >DECIMAL（38，18）的，所有DECIMAL（p, s）都会转到这个类型，这是因为SQL Client还是用的legacy 的数据类型。
>> >你可以用其他 connector 如 Filesystem、Kafka等connector读取， 社区已经有一个issue[1] 在跟进了。
>> >
>> >祝好，
>> >Leonard Xu
>> >[1] https://issues.apache.org/jira/browse/FLINK-17948
>> ><https://issues.apache.org/jira/browse/FLINK-17948>
>> >
>> >> 在 2020年7月14日，17:58，wldd <[email protected]> 写道：
>> >>
>> >> sql-client
>> >
>>
>>
>>
>
