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pbivic merged 1 commit into from
May 22, 2026
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Add Unsupported constructs section #3003

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15 changes: 15 additions & 0 deletions docs/xdr/features/investigate/sol_ref_operators.md
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Expand Up @@ -1054,6 +1054,20 @@ Use the `matches regex` operator to filter the rows based on a regex pattern.
| `(...)` | Forms a group. You can use a group to treat part of the expression as a single character | `abc(def)?` matches 'abc' and 'abcdef' but not 'abcd' |
| `[...]` | Match one of the character in the brackets<br>Inside the brackets, `-` indicates a range unless `-` is the first character or escaped<br>A `^` before a character in the brackets negates the character or range | `[abc]` matches 'a', 'b', 'c'<br>`[-abc]` matches '-', 'a', 'b', 'c'<br>`[^abc]` matches any character except 'a', 'b', or 'c' |

The `matches regex` operator uses a restricted regex syntax.

### Unsupported constructs

The following constructs are **not supported**. Using them will return no results without an error message.

| Unsupported construct | Example |
|---|---|
| Non-capturing groups | `(?:pattern)` |
| Named capture groups | `(?P<name>pattern)` |
| Inline flags | `(?i)`, `(?m)`, `(?s)` |
| Lookaheads / lookbehinds | `(?=...)`, `(?!...)`, `(?<=...)`, `(?<!...)` |
| Backreferences | `\1`, `\k<name>` |

!!! info
Some characters are reserved as operators: `.` `?` `+` `*` `|` `{` `}` `[` `]` `(` `)` `"` `\` .<br>Escape reserved operators with a preceding backslash `\` or surround them with double quotes `""`.<br>`\@` renders as a literal '@'.<br>`\\` renders as a literal '\'.<br>`"john@smith.com"` renders as 'john@smith.com'.

Expand All @@ -1079,6 +1093,7 @@ Use the `matches regex` operator to filter the rows based on a regex pattern.
| 2026-03-26T14:22:03.120Z | deploy.sh |
| 2026-03-26T14:19:47.883Z | cleanup.sh |
| 2026-03-26T14:17:31.554Z | install_agent.sh |


## Variables

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