SSC-FDM-GP0001

The performance of the CLUSTER BY may vary compared to the performance of Distributed By

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Description

The DISTRIBUTED BY in Greenplum is analogous to CLUSTER BY in Snowflake. However, performance implications may vary due to architectural differences between Greenplum and Snowflake.

• DISTRIBUTED BY controls the physical distribution of data across the nodes (segments) in Greenplum's MPP architecture..

• CLUSTER BY in Snowflake organizes data into blocks based on designated columns, aiding in filtering and aggregation tasks.

Understanding these mechanisms is crucial for optimizing performance in each respective platform.

Code Example

Input Code:

Redshift

IN -> Greenplum_01.sql

CREATE TABLE table1 (colum1 int, colum2 int, colum3 smallint, colum4 int )
DISTRIBUTED BY (colum1, colum2);

Output Code:

Snowflake

OUT -> Greenplum_01.sql

CREATE TABLE table1 (colum1 int, colum2 int, colum3 smallint, colum4 int )
--** SSC-FDM-GP0001 - THE PERFORMANCE OF THE CLUSTER BY MAY VARY COMPARED TO THE PERFORMANCE OF DISTRIBUTED BY **
CLUSTER BY (colum1, colum2)
COMMENT = '{ "origin": "sf_sc", "name": "snowconvert", "version": {  "major": 0,  "minor": 0,  "patch": "0" }, "attributes": {  "component": "greenplum",  "convertedOn": "03/26/2025",  "domain": "test" }}'
;

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