RE2 syntax

RE2 regular expression syntax describes the syntax of the regular expression library used by Kusto (re2). There are a few functions in Kusto that perform string matching, selection, and extraction by using a regular expression

The regular expression syntax supported by Kusto is that of the re2 library. These expressions must be encoded in Kusto as string literals, and all of Kusto's string quoting rules apply. For example, the regular expression \A matches the beginning of a line, and is specified in Kusto as the string literal "\\A" (note the "extra" backslash (\) character).