redshift_unload>: Redshift unload operations¶

redshift_unload> operator runs UNLOAD statement to export data to external storage on Redshift.

_export:
  redshift:
    host: my-redshift.1234abcd.us-east-1.redshift.amazonaws.com
    # port: 5439
    database: production_db
    user: app_user
    ssl: true
    schema: myschema
    # strict_transaction: false

+load_from_s3_with_many_options:
    redshift_unload>:
    query: select * from access_logs
    to: s3://my-app-bucket/access_logs/today
    manifest: true
    encrypted: true
    delimiter: "$"
    # fixedwidth: host:15,code:3,method:15
    gzip: true
    # bzip2: true
    null_as: nULl
    escape: false
    addquotes: true
    parallel: ON

Secrets¶

When you set those parameters, use digdag secrets command.

aws.redshift.password: NAME

Optional user password to use when connecting to the Redshift database.
aws.redshift_unload.access_key_id, aws.redshift.access_key_id, aws.access_key_id

The AWS Access Key ID to use when accessing data source. This value is used to get temporary security credentials by default. See temp_credentials option for details.
aws.redshift_unload.secret_access_key, aws.redshift.secret_access_key, aws.secret_access_key

The AWS Secret Access Key to use when accessing data source. This value is used to get temporary security credentials by default. See temp_credentials option for details.
aws.redshift_load.role_arn, aws.redshift.role_arn, aws.role_arn

Optional Amazon resource names (ARNs) used to copy data to the Redshift. The role needs AssumeRole role to use this option. Requires temp_credentials to be true. If this option isn’t specified, this operator tries to use a federated user

Options¶

database: NAME

Database name.

Examples:
```
database: my_db
```
host: NAME

Hostname or IP address of the database.

Examples:
```
host: db.foobar.com
```
port: NUMBER

Port number to connect to the database. Default: 5439.

Examples:
```
port: 2345
```
user: NAME

User to connect to the database

Examples:
```
user: app_user
```
ssl: BOOLEAN

Enable SSL to connect to the database. Default: false.

Examples:
```
ssl: true
```
schema: NAME

Default schema name. Default: public.

Examples:
```
schema: my_schema
```
strict_transaction: BOOLEAN

Whether this operator uses a strict transaction to prevent generating unexpected duplicated records just in case. Default: true. This operator creates and uses a status table in the database to make an operation idempotent. But if creating a table isn’t allowed, this option should be false.

Examples:
```
strict_transaction: false
```
status_table_schema: NAME

Schema name of status table. Default: same as the value of schema option.

Examples:
```
status_table_schema: writable_schema
```
status_table: NAME

Table name prefix of status table. Default: __digdag_status.

Examples:
```
status_table: customized_status_table
```
query: STRING

SELECT query. The results of the query are unloaded.

Examples:
```
query: select * from access_logs
```
to: URI

Parameter mapped to TO parameter of Redshift’s UNLOAD statement

Examples:
```
to: s3://my-app-bucket/access_logs/today
```
manifest: BOOLEAN

Parameter mapped to MANIFEST parameter of Redshift’s UNLOAD statement

Examples:
```
manifest: true
```
encrypted: BOOLEAN

Parameter mapped to ENCRYPTED parameter of Redshift’s UNLOAD statement

Examples:
```
encrypted: true
```
allowoverwrite: BOOLEAN

Parameter mapped to ALLOWOVERWRITE parameter of Redshift’s UNLOAD statement

Examples:
```
allowoverwrite: true
```
delimiter: CHARACTER

Parameter mapped to DELIMITER parameter of Redshift’s UNLOAD statement

Examples:
```
delimiter: "$"
```
fixedwidth: BOOLEAN

Parameter mapped to FIXEDWIDTH parameter of Redshift’s UNLOAD statement

Examples:
```
fixedwidth: host:15,code:3,method:15
```
gzip: BOOLEAN

Parameter mapped to GZIP parameter of Redshift’s UNLOAD statement

Examples:
```
gzip: true
```
bzip2: BOOLEAN

Parameter mapped to BZIP2 parameter of Redshift’s UNLOAD statement

Examples:
```
bzip2: true
```
null_as: BOOLEAN

Parameter mapped to NULL_AS parameter of Redshift’s UNLOAD statement

Examples:
```
null_as: nuLL
```
escape: BOOLEAN

Parameter mapped to ESCAPE parameter of Redshift’s UNLOAD statement

Examples:
```
escape: true
```
addquotes: BOOLEAN

Parameter mapped to ADDQUOTES parameter of Redshift’s UNLOAD statement

Examples:
```
addquotes: true
```
parallel: TYPE

Parameter mapped to PARALLEL parameter of Redshift’s UNLOAD statement

Examples:
```
parallel: ON
```
temp_credentials: BOOLEAN

Whether this operator uses temporary security credentials. Default: true. This operator tries to use temporary security credentials as follows:
- If role_arn is specified, it calls AssumeRole action
- If not, it calls GetFederationToken action
See details about AssumeRole and GetFederationToken in the documents of AWS Security Token Service.

So either of AssumeRole or GetFederationToken action is called to use temporary security credentials by default for secure operation. But if this option is disabled, this operator uses credentials as-is set in the secrets insread of temporary security credentials.

Examples:
```
temp_credentials: false
```
session_duration INTEGER

Session duration of temporary security credentials. Default: 3 hour. This option isn’t used when disabling temp_credentials

Examples:
```
session_duration: 1800
```