How to make use of parallelization with cstore_fdw? about cstore_fdw

[njanakiev]

Data used is from http://examples.citusdata.com/customer_reviews_1998.csv.gz and http://examples.citusdata.com/customer_reviews_1999.csv.gz. Creation of cstore table:

CREATE EXTENSION  cstore_fdw;
CREATE SERVER cstore_server FOREIGN DATA WRAPPER cstore_fdw;

CREATE FOREIGN TABLE customer_reviews_cstore ( 
    customer_id TEXT, 
    review_date DATE, 
    review_rating INTEGER, 
    review_votes INTEGER, 
    review_helpful_votes INTEGER, 
    product_id CHAR(10), 
    product_title TEXT, 
    product_sales_rank BIGINT, 
    product_group TEXT, 
    product_category TEXT, 
    product_subcategory TEXT, 
    similar_product_ids CHAR(10)[] )
SERVER cstore_server OPTIONS(compression 'pglz');

COPY customer_reviews_cstore FROM '/home/user/customer_reviews_1998.csv' WITH CSV;
COPY customer_reviews_cstore FROM '/home/user/customer_reviews_1999.csv' WITH CSV;

Creation of table without cstore:

CREATE TABLE customer_reviews ( 
    customer_id TEXT, 
    review_date DATE, 
    review_rating INTEGER, 
    review_votes INTEGER, 
    review_helpful_votes INTEGER, 
    product_id CHAR(10), 
    product_title TEXT, 
    product_sales_rank BIGINT, 
    product_group TEXT, 
    product_category TEXT, 
    product_subcategory TEXT, 
    similar_product_ids CHAR(10)[]
);
    
COPY customer_reviews FROM '/home/user/customer_reviews_1999.csv' WITH CSV;
COPY customer_reviews  FROM '/home/user/customer_reviews_1999.csv' WITH CSV;

[sdressler]

AFAICT, you will have to make use of partitions to see parallelism.