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# AWS::CloudWatch::LogAlarm ScheduledQueryConfiguration
<a name="aws-properties-cloudwatch-logalarm-scheduledqueryconfiguration"></a>

The configuration of the underlying CloudWatch Logs scheduled query that this alarm evaluates, including the query string, log groups, schedule, and aggregation expression.

## Syntax
<a name="aws-properties-cloudwatch-logalarm-scheduledqueryconfiguration-syntax"></a>

To declare this entity in your CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-cloudwatch-logalarm-scheduledqueryconfiguration-syntax.json"></a>

```
{
  "[AggregationExpression](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-aggregationexpression)" : {{String}},
  "[LogGroupIdentifiers](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-loggroupidentifiers)" : {{[ String, ... ]}},
  "[QueryString](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-querystring)" : {{String}},
  "[ScheduleConfiguration](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-scheduleconfiguration)" : {{ScheduleConfiguration}},
  "[ScheduledQueryRoleARN](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-scheduledqueryrolearn)" : {{String}}
}
```

### YAML
<a name="aws-properties-cloudwatch-logalarm-scheduledqueryconfiguration-syntax.yaml"></a>

```
  [AggregationExpression](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-aggregationexpression): {{String}}
  [LogGroupIdentifiers](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-loggroupidentifiers): {{
    - String}}
  [QueryString](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-querystring): {{
    String}}
  [ScheduleConfiguration](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-scheduleconfiguration): {{
    ScheduleConfiguration}}
  [ScheduledQueryRoleARN](#cfn-cloudwatch-logalarm-scheduledqueryconfiguration-scheduledqueryrolearn): {{String}}
```

## Properties
<a name="aws-properties-cloudwatch-logalarm-scheduledqueryconfiguration-properties"></a>

`AggregationExpression`  <a name="cfn-cloudwatch-logalarm-scheduledqueryconfiguration-aggregationexpression"></a>
The expression that defines how to aggregate query results into one or more scalar values for alarm evaluation. For example, `count(*)` or `avg(latency) by host | sort desc`. Length constraints: minimum 1 character, maximum 2048 characters.  
*Required*: Yes  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `256`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`LogGroupIdentifiers`  <a name="cfn-cloudwatch-logalarm-scheduledqueryconfiguration-loggroupidentifiers"></a>
The log groups to query. Each entry can be a log group name or ARN. Use the ARN form when querying log groups in a different account (for example, when running cross-account queries from a monitoring account). The list must contain between 1 and 50 entries.  
*Required*: Yes  
*Type*: Array of String  
*Minimum*: `1`  
*Maximum*: `50`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`QueryString`  <a name="cfn-cloudwatch-logalarm-scheduledqueryconfiguration-querystring"></a>
The CloudWatch Logs query to execute on each scheduled run. Length constraints: maximum of 10,000 characters.  
*Required*: Yes  
*Type*: String  
*Minimum*: `0`  
*Maximum*: `10000`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`ScheduleConfiguration`  <a name="cfn-cloudwatch-logalarm-scheduledqueryconfiguration-scheduleconfiguration"></a>
The schedule and time-range offset configuration for the underlying scheduled query.  
*Required*: Yes  
*Type*: [ScheduleConfiguration](aws-properties-cloudwatch-logalarm-scheduleconfiguration.md)  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`ScheduledQueryRoleARN`  <a name="cfn-cloudwatch-logalarm-scheduledqueryconfiguration-scheduledqueryrolearn"></a>
The Amazon Resource Name (ARN) of the IAM role that CloudWatch assumes when executing the scheduled query against the configured log groups.  
*Required*: Yes  
*Type*: String  
*Minimum*: `1`  
*Maximum*: `1024`  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)