5.4.5 Components Tab

Figure Filter expression dialog - Components tab shows the Components tab. The Selected components list on the right and the Command drop down list on the bottom display the created filter expression. Open the Command drop down list to reuse previously created filter expressions. You can either directly enter a filter expression in the Command field or you can create an expression by using the buttons next to the Columns and Selected components lists. 

Filter expression dialog - Components tab
Filter expression dialog - Components tab

Log records consist of different pieces of information which are organized in columns, e.g. timestamps, types of a log record (error, warning, info), etc. Select the column whose information should be evaluated and press the Add button to add a filter expression component to the end of the filter expression or press the Insert button to insert it before the currently selected line in the Selected components list. The Filter Criterion dialog (see figure Specifying a filter criterion for a filter expression component) will pop up where you have to specify an operator and a value that should be compared with the content of the column's cells.

Specifying a filter criterion  for a filter expression component
Specifying a filter criterion for a filter expression component

Note that in the dialog above a mapped value is compared (see Mapping Data onto Descriptions and Icons). Therefore no double quotes are used in the Values edit control. If a string has to be compared it must be encompassed in double quotes.

Use the buttons next to the Selected components list to edit, remove or move (Arrow buttons) the selected filter expression component. Press the Clear button to remove all filter components from the Selected components list.

The Components tab also shows you if a filter expression is valid at the bottom of the dialog. Press OK to create the filter expression or Cancel to discard any settings.