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[英]Why is Pentaho Report Designer adding parameter named “ce” to Database Connection of the report?
[英]How In pentaho report designer I want to check if multivalue parameter is empty or null?
我的参数定义:
<list-parameter name="Direction" allow-multi-selection="true" strict-values="true" mandatory="false" type="[Ljava.lang.String;" query="DirectionQuery" key-column="BC_CALL_CLASSIFICATION_DIM_DIRECTION_NAME" value-column="BC_CALL_CLASSIFICATION_DIM_DIRECTION_NAME">
<attribute namespace="http://reporting.pentaho.org/namespaces/engine/parameter-attributes/core" name="role">user</attribute>
<attribute namespace="http://reporting.pentaho.org/namespaces/engine/parameter-attributes/core" name="parameter-render-type">list</attribute>
<attribute namespace="http://reporting.pentaho.org/namespaces/engine/parameter-attributes/core" name="label">Direction</attribute>
<attribute namespace="http://reporting.pentaho.org/namespaces/engine/parameter-attributes/core" name="hidden">false</attribute>
约束部分在我的MQL查询中
<constraint>
<operator>AND</operator>
<condition>OR( ISNA([param:Destination Type]);EQUALS([BC_FCT_CALLS.BC_NUMBER_CLASSIFICATION_DIM_CLASSIFICATION];[param:Destination Type]))</condition>
</constraint>
<constraint>
<operator>AND</operator>
<condition>OR(COUNTA([param:Direction]) == 0 ;EQUALS([BC_FCT_CALLS.BC_CALL_CLASSIFICATION_DIM_DIRECTION_NAME];[param:Direction]))</condition>
</constraint>
第一个约束有效,因为参数是单个值,但是第二个约束给我一条消息,不支持CONTA,如果用户选择多个值,则ISNA不起作用。
我找到了一种方法,对于每个多值参数“ param1”,在“后处理器公式”中为新参数创建另一个隐藏的布尔参数“ param1_hidden”,请使用以下公式
=(COUNTA([param1]) = 0 )
现在在您的查询中
OR( EQUALS(TRUE();[param:param1_hidden);EQUALS([TABLE.COLUMN];[param:param1,]))
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