Filter criteria are specified as the column name, followed by an equality, inequality, or Boolean operator, followed by the filter value.
过滤条件可以指定为列名，其后跟等式、不等式或布尔运算符，然后是过滤值。
Based on the Boolean return value, the record either becomes a member of the result set or is tossed aside as a record that does not meet the search criteria.
根据返回的布尔值，每条记录要么成为结果集的成员，要么被归为不满足搜索条件的记录放弃。
Like topic selection, message selection criteria expressions are defined using a SQL-like syntax, which must resolve to a Boolean value.
和主题选择一样，消息选择标准表达式使用sql样式的语法定义，该语法必须求解出一个布尔值。
Invalid query: make sure parenthesis are balanced and the custom query consists only of valid criteria Numbers and the Boolean operators and, or, and NOT.
查询无效：确保括号完整，自定义查询只包含有效标准数字以及布尔型运算符and、OR和NOT。
Invalid query: make sure parenthesis are balanced and the custom query consists only of valid criteria Numbers and the Boolean operators and, or, and NOT.
查询无效：确保括号完整，自定义查询只包含有效标准数字以及布尔型运算符and、OR和NOT。
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