!hassuffix operator

Filters a record set for data that does not have a case-insensitive 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"

Note

The following abbreviations are used in the table above:

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

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

Case-insensitive operators are currently supported only for ASCII-text. For non-ASCII comparison, use the tolower() function.

Performance tips

Note

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.

For best practices, see Query best practices.

Syntax

T | where Column !hassuffix (Expression)

Arguments

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

Returns

Rows in T for which the predicate is true.

Example

StormEvents
    | summarize event_count=count() by State
    | where State !hassuffix "A"
    | where event_count > 2000
    | project State, event_count

Output

State event_count
TEXAS 4701
KANSAS 3166
ILLINOIS 2022
MISSOURI 2016