Comments (2)
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;
from cstore_fdw.
AFAICT, you will have to make use of partitions to see parallelism.
from cstore_fdw.
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- 目录不存在
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from cstore_fdw.