AWD DMS Replace Character

Question

Hi !

I configured a AWS DMS containing an Oracle as Source database and a S3 Bucket as target.

Problem Statement:
My Oracle database contains `Horizontal Tab` and `Line feed` characters on the row content. I would like to replace/remove those characters.

I tried to add `CharacterSetSettings` to Migration Task Settings but it's not supported for S3 as target.
Also the rfc4180 property add quotes to the value but it doesn't solve the problem when the consumers try to load the row in a redshift.

Is there another way that I can remove those characters without setting an extra resources/infrastructure?

Source endpoint settings:
```
{
    "AddSupplementalLogging": true,
    "ExtraArchivedLogDestIds": [],
    "AllowSelectNestedTables": true,
    "DatabaseName": "MyDatabase",
    "UseBFile": true,
    "UseLogminerReader": false,
    "SecretsManagerAccessRoleArn": "arn:aws:iam::0000011111:role/SynchroReplicationInfrastructureSecretsManagerReadWriteRole",
    "SecretsManagerSecretId": "arn:aws:secretsmanager:us-east-1:0000011111:secret:beta/xyzedf"
}
```

Target endpoint settings: 
```
{
    "CsvRowDelimiter": "\n",
    "CsvDelimiter": "\t",
    "BucketFolder": "MyFolder",
    "BucketName": "MyBucketName",
    "CompressionType": "NONE",
    "DataFormat": "csv",
    "EnableStatistics": true,
    "IncludeOpForFullLoad": true,
    "TimestampColumnName": "transactionCommitTimestamp",
    "DatePartitionEnabled": false,
    "AddColumnName": false,
    "MaxFileSize": 2000
}
```

Answer

To solve this issue I added lambda to remove those characters.

I used to have the following flow:

Oracle DB -> AWS DMS -> S3 Bucket

Current:

Oracle DB -> AWS DMS -> S3 Bucket1 -> Lambda -> S3 Bucket2

Answer

Have you tried using replace function to modify the contents as per https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Tasks.CustomizingTasks.TableMapping.SelectionTransformation.Expressions.html#:~:text=%3A%2050%0A%7D%0A%7D-,Using%20SQLite%20functions%20to%20build%20expressions,-You%20use%20table

replace(x,y,z)

The replace(x,y,z) function returns a string formed by substituting string z for every occurrence of string y in string x.

I hope it helps.

replace(x,y,z)

The replace(x,y,z) function returns a string formed by substituting string z for every occurrence of string y in string x.

I hope it helps.

AWD DMS Replace Character

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