Contains the conditions names and expressions of the filtering system.
Structure of filter_expr
Unique ID for the expression.
Name of the condition
Id of the last user who modified the condition.
timestamp with time zone
Date of the last update of the row.
Text of the expression. This is what is evaluated by the filtering system to compute whether the condition is true or false.
Indicates if the filter should be used for incoming messages (direction='I'), outgoing messages (direction='O') or both incoming and outgoing (direction='B').
Tables referencing filter_expr via Foreign Key Constraints