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+---
+title: Flux Rows package
+list_title: Rows package
+description: >
+  The Flux Rows package provides additional functions for remapping values in rows.
+  Import the `contrib/jsternberg/rows` package.
+menu:
+  v2_0_ref:
+    name: Rows
+    parent: Contributed
+weight: 202
+v2.0/tags: [functions, package]
+---
+
+The Flux Rows package provides additional functions for remapping values in rows.
+Import the `contrib/jsternberg/rows` package:
+
+```js
+import "contrib/jsternberg/rows"
+```
+
+{{< children type="functions" show="pages" >}}
+
+{{% note %}}
+#### Package author and maintainer
+**Github:** [@jsternberg](https://github.com/jsternberg)  
+**InfluxDB Slack:** [@Jonathan Sternberg](https://influxdata.com/slack)
+{{% /note %}}
diff --git a/content/v2.0/reference/flux/stdlib/contrib/rows/map.md b/content/v2.0/reference/flux/stdlib/contrib/rows/map.md
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+---
+title: rows.map() function
+description: >
+  The `rows.map()` function is an alternate implementation of [`map()`](/v2.0/reference/flux/stdlib/built-in/transformations/map/)
+  that is faster, but more limited than `map()`.
+menu:
+  v2_0_ref:
+    name: rows.map
+    parent: Rows
+weight: 202
+v2.0/tags: [functions, package, map]
+related:
+  - /v2.0/reference/flux/stdlib/built-in/transformations/map/
+---
+
+The `rows.map()` function is an alternate implementation of [`map()`](/v2.0/reference/flux/stdlib/built-in/transformations/map/)
+that is faster, but more limited than `map()`.
+`rows.map()` cannot modify table groups key and, therefore, does not need to regroup tables.
+**Attempts to change columns in the group key are ignored.**
+
+_**Function type:** Transformation_
+
+```js
+import "contrib/jsternberg/rows"
+
+rows.map( fn: (r) => ({_value: r._value * 100.0}))
+```
+
+## Parameters
+
+### fn
+
+A single argument function to apply to each record.
+The return value must be an object.
+
+_**Data type:** Function_
+
+{{% note %}}
+Use the `with` operator to preserve columns **not** in the group and **not**
+explicitly mapped in the operation.
+{{% /note %}}
+
+## Examples
+The examples below use a `data` variable that represents the following input tables:
+
+---
+
+### Perform mathemtical operations on column values
+The following example returns the square of each value in the `_value` column:
+
+```js
+import "contrib/jsternberg/rows"
+
+data
+  |> rows.map(fn: (r) ({ _value: r._value * r._value }))
+```
+
+{{% note %}}
+#### Important notes
+The `_time` column is dropped because:
+
+- It's not in the group key.
+- It's not explicitly mapped in the operation.
+- The `with` operator was not used to include existing columns.
+{{% /note %}}
+
+{{< flex >}}
+{{% flex-content %}}
+#### Input tables
+
+**Group key:** `tag,_field`
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag1 | foo    | 0001  | 1.9    |
+| tag1 | foo    | 0002  | 2.4    |
+| tag1 | foo    | 0003  | 2.1    |
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag2 | bar    | 0001  | 3.1    |
+| tag2 | bar    | 0002  | 3.8    |
+| tag2 | bar    | 0003  | 1.7    |
+{{% /flex-content %}}
+
+{{% flex-content %}}
+#### Output tables
+
+**Group key:** `tag,_field`
+
+| tag  | _field | _value |
+|:---  |:------ | ------:|
+| tag1 | foo    | 3.61   |
+| tag1 | foo    | 5.76   |
+| tag1 | foo    | 4.41   |
+
+| tag  | _field | _value |
+|:---  |:------ | ------:|
+| tag2 | bar    | 9.61   |
+| tag2 | bar    | 14.44  |
+| tag2 | bar    | 2.89   |
+{{% /flex-content %}}
+{{< /flex >}}
+
+---
+
+### Preserve all columns in the operation
+Use the `with` operator in your mapping operation to preserve all columns,
+including those not in the group key, without explicitly remapping them.
+
+```js
+import "contrib/jsternberg/rows"
+
+data
+  |> rows.map(fn: (r) ({ r with _value: r._value * r._value }))
+```
+
+{{% note %}}
+#### Important notes
+- The mapping operation remaps the `_value` column.
+- The `with` operator preserves all other columns not in the group key (`_time`).
+{{% /note %}}
+
+{{< flex >}}
+{{% flex-content %}}
+#### Input tables
+
+**Group key:** `tag,_field`
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag1 | foo    | 0001  | 1.9    |
+| tag1 | foo    | 0002  | 2.4    |
+| tag1 | foo    | 0003  | 2.1    |
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag2 | bar    | 0001  | 3.1    |
+| tag2 | bar    | 0002  | 3.8    |
+| tag2 | bar    | 0003  | 1.7    |
+{{% /flex-content %}}
+
+{{% flex-content %}}
+#### Output tables
+
+**Group key:** `tag,_field`
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag1 | foo    | 0001  | 3.61   |
+| tag1 | foo    | 0002  | 5.76   |
+| tag1 | foo    | 0003  | 4.41   |
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag2 | bar    | 0001  | 9.61   |
+| tag2 | bar    | 0002  | 14.44  |
+| tag2 | bar    | 0003  | 2.89   |
+{{% /flex-content %}}
+{{< /flex >}}
+
+---
+
+### Attempt to remap columns in the group key
+
+```js
+import "contrib/jsternberg/rows"
+
+data
+  |> rows.map(fn: (r) ({ r with tag: "tag3" }))
+```
+
+{{% note %}}
+#### Important notes
+- Remapping the `tag` column to `"tag3"` is ignored because `tag` is part of the group key.
+- The `with` operator preserves columns not in the group key (`_time` and `_value`).
+{{% /note %}}
+
+{{< flex >}}
+{{% flex-content %}}
+#### Input tables
+
+**Group key:** `tag,_field`
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag1 | foo    | 0001  | 1.9    |
+| tag1 | foo    | 0002  | 2.4    |
+| tag1 | foo    | 0003  | 2.1    |
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag2 | bar    | 0001  | 3.1    |
+| tag2 | bar    | 0002  | 3.8    |
+| tag2 | bar    | 0003  | 1.7    |
+{{% /flex-content %}}
+
+{{% flex-content %}}
+#### Output tables
+
+**Group key:** `tag,_field`
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag1 | foo    | 0001  | 1.9    |
+| tag1 | foo    | 0002  | 2.4    |
+| tag1 | foo    | 0003  | 2.1    |
+
+| tag  | _field | _time | _value |
+|:---  |:------ |:----- | ------:|
+| tag2 | bar    | 0001  | 3.1    |
+| tag2 | bar    | 0002  | 3.8    |
+| tag2 | bar    | 0003  | 1.7    |
+{{% /flex-content %}}
+{{< /flex >}}
+
+---
+
+{{% note %}}
+#### Package author and maintainer
+**Github:** [@jsternberg](https://github.com/jsternberg)  
+**InfluxDB Slack:** [@Jonathan Sternberg](https://influxdata.com/slack)
+{{% /note %}}