# ColumnDataType

**Kind:** Class

**Source:** `Pams/Web/Pams.WebApp/Client/app/models/dashboard/data-source-schema/column-data-type.model.ts` (line 2)

**Part of:** [Pams](subsystem-pams)

`ColumnDataType` represents type-related information for a column in the dashboard data-source schema. Its `clone()` method creates a separate instance so schema type data can be copied before it is changed.

## Methods

| Method | Signature | Returns |
|---|---|---|
| `clone` | `clone(model: ColumnDataType)` | `void` |

## Properties

| Property | Type |
|---|---|
| `SQLType` | `string` |
| `DotNetType` | `string` |
| `CSharpType` | `string` |
| `VBType` | `string` |
| `JavaType` | `string` |
| `LanguageSpecificType` | `string` |

## Where it refuses work

- `ColumnDataType` stops the work with an early return when `model == null`.

## Diagram

```mermaid
graph LR
    Schema[Data-source schema] --> Column[ColumnDataType]
    Column --> Clone[clone()]
    Clone --> Copy[Copied ColumnDataType]
```

## Usage

```ts
import { ColumnDataType } from './models/dashboard/data-source-schema/column-data-type.model';

function createEditableType(sourceType: ColumnDataType): ColumnDataType {
  const editableType = sourceType.clone();

  // Apply changes to editableType without changing sourceType.
  return editableType;
}
```

## AI Coding Instructions

- Call `clone()` before changing column type data that may also be referenced by the original schema.
- Keep copied instances independent from the source instance when adding or updating class fields.
- Update `clone()` when new mutable properties are added to `ColumnDataType`.
- Pass `ColumnDataType` instances through dashboard schema code rather than replacing them with untyped objects.

## Used by

2 references from 2 files. Each is a place in this repository where the symbol is actually used — go read one rather than trusting an example.

### Imported by (2)

- `DataSourceService` — `Pams/Web/Pams.WebApp/Client/app/services/dashboard/data-source.service.ts`:1
- `Column` — `Pams/Web/Pams.WebApp/Client/app/models/dashboard/data-source-schema/column.model.ts`:2