> For the complete documentation index, see [llms.txt](https://docs.pentaho.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview/replace-in-string/fields-string-table.md).

# Fields string table

![Fields string table in Replace in string](/files/7e8Eeyjq9IHfLCvRAwml)

You can specify the replacement string and select options pertaining to it in the following table.

| Column                 | Description                                                                                                              |
| ---------------------- | ------------------------------------------------------------------------------------------------------------------------ |
| **In stream field**    | Specify the field to replace from the PDI input stream. Click **Get Fields** to add all fields from the input stream(s). |
| **Out stream field**   | Specify the new field name to output to the PDI stream.                                                                  |
| **use RegEx**          | Select **Y** (Yes) or **N** (No) to indicate whether to use a regular expression to search for values.                   |
| **Search**             | Specify whether to search for matched values of this string.                                                             |
| **Replace with**       | Specify the string to replace the matched value.                                                                         |
| **Set empty string?**  | Select **Y** (Yes) or **N** (No) to indicate whether to replace null values with empty strings.                          |
| **Replace with field** | Specify a field value that will be used to replace the matched value.                                                    |
| **Whole Word**         | Select **Y** (Yes) or **N** (No) to indicate whether to replace the entire word of the matched value.                    |
| **Case sensitive**     | Select **Y** (Yes) or **N** (No) to indicate whether the search is case sensitive.                                       |
| **Is Unicode**         | Select **Y** (Yes) or **N** (No) to indicate whether the search value is a sequence of Unicode characters.               |

Use **Get Fields** to add all fields from the PDI input stream.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview/replace-in-string/fields-string-table.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.