WSO2 MySQL适配器语法错误

Question

I am trying to create an event formatter for MySql in WSO2 but am hitting a problem. It appears to be linked to the use of "Composite Key Columns". The error I am getting is:

ERROR - {MysqlEventAdaptorType}
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Window = '15'' at line 1

This only happens if I use a two or more keys in the formatter:

<eventFormatter name="GenericAccountSQLFormatter" statistics="enable"
  trace="enable" xmlns="http://wso2.org/carbon/eventformatter">
  <from streamName="GenericAccountMeasureStream" version="1.0.0"/>
  <mapping customMapping="disable" type="map"/>
  <to eventAdaptorName="APCSQLOut" eventAdaptorType="mysql">
    <property name="table.name">AccountStats</property>
    <property name="update.keys">AccountId,Window</property>
    <property name="execution.mode">insert-or-update</property>
  </to>
</eventFormatter>

Removing either of the keys (AccountId, Window) then the formatter will send data to MySQL.

Can anyone help?

Answer 1

This is a bug and happens when existing events are sent to a MySQL adaptor with composite keys. Created a jira to track this and the source patch is also available there.

If you don't want to create/apply a patch, then as a quick workaround for now - you can output a composite key from CEP query by concatenating the two attributes and use that as the key in formatter.

UPDATE

The source patch with the fix and build instructions are now available in the jira here . Once built, you need to apply it as a patch to CEP. To apply it as a patch, create a directory named patch0xyz ( xyz are digits as in patch0135, also make xyz > 100) in <CEP>/repository/components/patches and then place the jar inside it. Then you need to rename the jar as org.wso2.carbon.event.output.adaptor.mysql_1.0.1.jar . Then restart the server.