從Amazon Redshift 複製並卸載時,過渡 Amazon S3 所需的 Amazon S3 設定。 如此一來,Amazon Redshift 來源的資料會先卸載至 S3,然後從過渡期 S3 複製到目標接收。
In some cases, the UNLOAD command used the INCLUDE option as shown in the following SQL statement. unload ('select * from lineitem') to 's3://amzn-s3-demo-bucket/lineitem/' iam_role 'arn:aws:iam::0123456789012:role/MyRedshiftRole' PARQUET PARTITION BY (l_shipdate) INCLUDE; In the...
représente une valeur nulle, Amazon Redshift exporte SUPER les colonnes de données en utilisant JSON le format et les représente comme nulle, conformément au format. JSON Par conséquent, SUPER les colonnes de données ignorent l'option NULL [AS] utilisée dans UNLOAD les commandes. ...
The Amazon S3 settings needed for the interim Amazon S3 when copying from Amazon Redshift with unload.
public RedshiftUnloadSettings withBucketName(Object bucketName) Set the bucketName property: The bucket of the interim Amazon S3 which will be used to store the unloaded data from Amazon Redshift source. The bucket must be in the same region as the Amazon Redshift source. Type: string (or ...
The bucket of the interim Amazon S3 which will be used to store the unloaded data from Amazon Redshift source. The bucket must be in the same region as the Amazon Redshift source. Type: string (or Expression with resultType string).
The use of the unload command, and its purpose can vary depending on the scenario where they have to be used. Now let us consider one example where we have a scenario that we have to unload a table present in redshift to a CSV file in the S3 bucket. For example, we have a table...
Returns the number of rows that were unloaded by the last UNLOAD command completed in the current session. PG_LAST_UNLOAD_COUNT is updated with the query ID of the last UNLOAD, even if the operation failed. The query ID is updated when the UNLOAD is completed. If the UNLOAD fails because...
query_id integer The query identifier of the UNLOAD command. session_id integer The ID of the process associated with the query statement. transaction_id bigint The ID of the transaction associated with the query statement. file_name character (1280) The complete Amazon S3 object path for the...
The Amazon S3 settings needed for the interim Amazon S3 when copying from Amazon Redshift with unload. With this, data from Amazon Redshift source will be unloaded into S3 first and then copied into the targeted sink from the interim S3. All required parameters must be populated...