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!hassuffix_cs operator

Filters a record set for data that does not have a case-sensitive ending string. has searches for indexed terms, where a term is three or more characters. If your term is fewer than three characters, the query scans the values in the column, which is slower than looking up the term in the term index.

The following table provides a comparison of the hassuffix operators:

Operator Description Case-Sensitive Example (yields true)
hassuffix RHS is a term suffix in LHS No "North America" hassuffix "ica"
!hassuffix RHS isn't a term suffix in LHS No "North America" !hassuffix "americ"
hassuffix_cs RHS is a term suffix in LHS Yes "North America" hassuffix_cs "ica"
!hassuffix_cs RHS isn't a term suffix in LHS Yes "North America" !hassuffix_cs "icA"

The following abbreviations are used in the table above:

* RHS = right hand side of the expression
* LHS = left hand side of the expression

For further information about other operators and to determine which operator is most appropriate for your query, see datatype string operators.

Performance tips


Performance depends on the type of search and the structure of the data.

For faster results, use the case-sensitive version of an operator, for example, hassuffix_cs, not hassuffix.

If you're testing for the presence of a symbol or alphanumeric word that is bound by non-alphanumeric characters at the start or end of a field, for faster results use has or in.


T | where Column !hassuffix_cs (Expression)


  • T - The tabular input whose records are to be filtered.
  • Column - The column to filter.
  • Expression - Scalar or literal expression.


Rows in T for which the predicate is true.


//!hassuffix- case sensitive matching
    | project original_time, data_source_name, name
    //--- Search for the last 5 mins of data    
    | where original_time > now(-5m)
    //--- USER Criteria Here
    | where data_source_name !hassuffix_cs "ASA"
    | take 2


original_time data_source_name name
2023-04-11T12:27:01.489Z microsoftWindowsSource2 Failure Audit: An account failed to log on
2023-04-11T12:27:01.489Z microsoftWindowsSource5 Winlogon Notification Subscriber Unavailable