# DuplicateAliasInSubqueryError

# Class: DuplicateAliasInSubqueryError

Defined in: [packages/db/src/errors.ts:495](https://github.com/TanStack/db/blob/main/packages/db/src/errors.ts#L495)

Error thrown when a subquery uses the same alias as its parent query.
This causes issues because parent and subquery would share the same input streams,
leading to empty results or incorrect data (aggregation cross-leaking).

## Extends

- [`QueryCompilationError`](QueryCompilationError.md)

## Constructors

### Constructor

```ts
new DuplicateAliasInSubqueryError(alias, parentAliases): DuplicateAliasInSubqueryError;
```

Defined in: [packages/db/src/errors.ts:496](https://github.com/TanStack/db/blob/main/packages/db/src/errors.ts#L496)

#### Parameters

##### alias

`string`

##### parentAliases

`string`[]

#### Returns

`DuplicateAliasInSubqueryError`

#### Overrides

[`QueryCompilationError`](QueryCompilationError.md).[`constructor`](QueryCompilationError.md#constructor)

## Properties

### cause?

```ts
optional cause: unknown;
```

Defined in: node\_modules/.pnpm/typescript@5.9.3/node\_modules/typescript/lib/lib.es2022.error.d.ts:26

#### Inherited from

[`QueryCompilationError`](QueryCompilationError.md).[`cause`](QueryCompilationError.md#cause)

***

### message

```ts
message: string;
```

Defined in: node\_modules/.pnpm/typescript@5.9.3/node\_modules/typescript/lib/lib.es5.d.ts:1077

#### Inherited from

[`QueryCompilationError`](QueryCompilationError.md).[`message`](QueryCompilationError.md#message)

***

### name

```ts
name: string;
```

Defined in: node\_modules/.pnpm/typescript@5.9.3/node\_modules/typescript/lib/lib.es5.d.ts:1076

#### Inherited from

[`QueryCompilationError`](QueryCompilationError.md).[`name`](QueryCompilationError.md#name)

***

### stack?

```ts
optional stack: string;
```

Defined in: node\_modules/.pnpm/typescript@5.9.3/node\_modules/typescript/lib/lib.es5.d.ts:1078

#### Inherited from

[`QueryCompilationError`](QueryCompilationError.md).[`stack`](QueryCompilationError.md#stack)

***

### stackTraceLimit

```ts
static stackTraceLimit: number;
```

Defined in: node\_modules/.pnpm/@types+node@25.2.2/node\_modules/@types/node/globals.d.ts:67

The `Error.stackTraceLimit` property specifies the number of stack frames
collected by a stack trace (whether generated by `new Error().stack` or
`Error.captureStackTrace(obj)`).

The default value is `10` but may be set to any valid JavaScript number. Changes
will affect any stack trace captured _after_ the value has been changed.

If set to a non-number value, or set to a negative number, stack traces will
not capture any frames.

#### Inherited from

[`QueryCompilationError`](QueryCompilationError.md).[`stackTraceLimit`](QueryCompilationError.md#stacktracelimit)

## Methods

### captureStackTrace()

```ts
static captureStackTrace(targetObject, constructorOpt?): void;
```

Defined in: node\_modules/.pnpm/@types+node@25.2.2/node\_modules/@types/node/globals.d.ts:51

Creates a `.stack` property on `targetObject`, which when accessed returns
a string representing the location in the code at which
`Error.captureStackTrace()` was called.

```js
const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack;  // Similar to `new Error().stack`
```

The first line of the trace will be prefixed with
`${myObject.name}: ${myObject.message}`.

The optional `constructorOpt` argument accepts a function. If given, all frames
above `constructorOpt`, including `constructorOpt`, will be omitted from the
generated stack trace.

The `constructorOpt` argument is useful for hiding implementation
details of error generation from the user. For instance:

```js
function a() {
  b();
}

function b() {
  c();
}

function c() {
  // Create an error without stack trace to avoid calculating the stack trace twice.
  const { stackTraceLimit } = Error;
  Error.stackTraceLimit = 0;
  const error = new Error();
  Error.stackTraceLimit = stackTraceLimit;

  // Capture the stack trace above function b
  Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
  throw error;
}

a();
```

#### Parameters

##### targetObject

`object`

##### constructorOpt?

`Function`

#### Returns

`void`

#### Inherited from

[`QueryCompilationError`](QueryCompilationError.md).[`captureStackTrace`](QueryCompilationError.md#capturestacktrace)

***

### prepareStackTrace()

```ts
static prepareStackTrace(err, stackTraces): any;
```

Defined in: node\_modules/.pnpm/@types+node@25.2.2/node\_modules/@types/node/globals.d.ts:55

#### Parameters

##### err

`Error`

##### stackTraces

`CallSite`[]

#### Returns

`any`

#### See

https://v8.dev/docs/stack-trace-api#customizing-stack-traces

#### Inherited from

[`QueryCompilationError`](QueryCompilationError.md).[`prepareStackTrace`](QueryCompilationError.md#preparestacktrace)