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# AmazonChangeDynamoDbTablesParameters Object

## Description

Parameters for the Amazon Change DynamoDB Tables action.

## Properties

### credentialIds

Registered credentials to use with the action. One and only one credential must be specified.

Type: Array of `string`

Required: Yes

### readCapacity

New read capacity value to apply to the tables.

Type: `integer`

Required: No

### regionNames

Regions to use with the action. One and only one region must be specified.

Type: Array of `string`

Required: Yes

### revertTimeInSeconds

Time (in seconds) to revert the tables to their original values.

Type: `integer`

Required: No

### tableIdentificationMethod

Method used to select tables to be modified.

Type: `string`

Valid Values:

* `all-tables`
* `by-table-name`

Required: Yes

### tableNameComparison

Comparison to use when comparing by table name. Required when `tableIdentificationMethod` is `by-table-name`.

Type: [TableNameComparison](/data-types/tablenamecomparison-object.md) object

Required: Conditional

### writeCapacity

New write capacity value to apply to the tables.

Type: `integer`

Required: No

## Sample JSON

```javascript
{
    "credentialIds": [
        "cred-00000001"
    ],
    "regionNames": [
        "us-east-1"
    ],

    "tableIdentificationMethod": "by-table-name",
    "tableNameComparison": {
        "compareType": "starts-with",
        "tableName": "prod-"
    },

    "readCapacity": 10,
    "writeCapacity": 3,

    "revertTimeInSeconds": 43200
}
```