![]() Important: If you loaded your data using a COPY with the ESCAPE option, you must also specify the ESCAPE option with your UNLOAD command to generate the reciprocal output file. We strongly recommend that you always select this property unless you are certain that your data does not contain any delimiters or other characters that might need to be escaped. The escape character: \ A quote character: " or ' (if both ESCAPE and ADDQUOTES are selected). If selected, for CHAR and VARCHAR columns in delimited unload files, an escape character (\) is placed before every occurrence of the following characters: Linefeed: \n Carriage return: \r The delimiter character specified for the unloaded data. 'Īnaplan server may ignore this setting and try to auto-detect. The format for fixedwidth_spec is: 'colID1:colWidth1,colID2:colWidth2. Because FIXEDWIDTH does not truncate data, the specification for each column in the UNLOAD query needs to be at least as long as the length of the longest entry for that column. DELIMITER is ignored if FIXEDWIDTH is specified. The FIXEDWIDTH spec is a string that specifies the number of columns and the width of the columns. Specifies FIXEDWIDTH spec., in which Redshift unloads the data to a file where each column width is a fixed length, rather than separated by a delimiter. Alternatively, specify a delimiter that is not contained in the data.Įxample: a pipe character ( | ), a comma (, ), or a tab ( \t ) If the data contains the delimiter character, you will need to specify the ESCAPE option to escape the delimiter, or use ADDQUOTES to enclose the data in double quotes. DELIMITER will be ignored if FIXEDWIDTH is specified. Single ASCII character that is used to separate fields in the output file. ![]() The Amazon S3 bucket where Amazon Redshift will write the output files must reside in the same region as your cluster. File names created by RedShift are in the format: s3:////_part_, where is the value of this property. The Snap uses S3 Bucket and S3 Folder in the RedShift Account to format the full S3 path. The prefix of AWS S3 file names which are used by Redshift to write data. In most cases, it is worthwhile to unload data in sorted order by specifying an ORDER BY clause in the query this approach will save the time required to sort the data when it is reloaded.Įxample: SELECT * FROM pany ORDER BY id You can modify this to be more specific, especially if you have more than one of the same Snap in your pipeline.ĭefines a SELECT query. If there is any error, you will be able to preview the output file in the File Writer Snap for the error information. Connect a JSON Formatter and a File Writer Snaps to the error view and then execute the pipeline. The preview on this Snap will not execute the Redshift UNLOAD operation. The error view would contain error, reason, resolution and stack trace. This Snap has at most one document error view and produces zero or more documents in the view. an "entries" field with a list of S3 URL's written by the Redshift UNLOAD operation.a "unloadQuery" field with the query sent to Redshift, and.a "status" field with "success" or "preview",.This Snap has at most one document output view. The Amazon S3 bucket where Amazon Redshift should allow write access from the IP address of the cloudplex or groundplex.The Amazon S3 bucket where Amazon Redshift will write the output files must reside in the same region as your cluster.The Redshift account security settings should allow access from the IP Address of the cloudplex or groundplex.The Redshift account should contain S3 Access-key ID, S3 Secret key, S3 Bucket and S3 Folder.Upon the successful execution, the expected output data is as follows: unloadQuery - the actual SQL command executed.Input: Key-value map data to evaluate expression properties of the Snap. (Note: elsewhere I've seen the default delimiter listed as a pipe ('|') character.) Input & Output The default CSV delimiter is a carat ('^'), not a comma. It is possible to override this behavior but the resulting file must be smaller than 6.2 GB. Alternately the data may be downloaded to another system using the S3 READ Snap.īy default the data will be written to a separate CSV-encoded compressed file per Redshift 'slice'. The COPY snap moves data from an optionally encrypted S3 bucket into a second Redshift instance. The Snap allows data to be efficiently moved from one Redshift instance to an optionally encrypted S3 bucket. This Snap provides a front end to the Amazon Redshift Unload/Copy Utility. The CSV Formatter Snap cannot be connected directly to this Snap since the output document map data is not flat. The Snap behaves the same on a Groundplex as it does in a Cloudplex.Įxpected upstream Snaps: Any Snap with a document output viewĮxpected downstream Snaps: Any Snap with a document input view, such as JSON Formatter, Mapper, and so on.
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