DUMP_PROJECTION_PARTITION_KEYS

Dumps the partition keys of the specified projection.

Syntax

DUMP_PROJECTION_PARTITION_KEYS( '[[database.]schema.]projection-name')

Parameters

[database.]schema

Specifies a schema, by default public. If schema is any schema other than public, you must supply the schema name. For example:

myschema.thisDbObject

If you specify a database, it must be the current database.
projection‑name

The projection name.

Privileges

  • SELECT privilege on table
  • USAGE privileges on schema

Example

The following statements create the table and projection online_sales.online_sales_fact and online_sales.online_sales_fact_unseg_p, respectively, and partitions table data by the column call_center_key:

=> CREATE TABLE online_sales.online_sales_fact
(
    sale_date_key int NOT NULL,
    ship_date_key int NOT NULL,
    product_key int NOT NULL,
    product_version int NOT NULL,
    customer_key int NOT NULL,
    call_center_key int NOT NULL,
    online_page_key int NOT NULL,
    shipping_key int NOT NULL,
    warehouse_key int NOT NULL,
    promotion_key int NOT NULL,
    pos_transaction_number int NOT NULL,
    sales_quantity int,
    sales_dollar_amount float,
    ship_dollar_amount float,
    net_dollar_amount float,
    cost_dollar_amount float,
    gross_profit_dollar_amount float,
    transaction_type varchar(16)
)
PARTITION BY (online_sales_fact.call_center_key);

=> CREATE PROJECTION online_sales.online_sales_fact_unseg_p AS SELECT * from online_sales.online_sales_fact unsegmented all nodes;

The following DUMP_PROJECTION_PARTITION_KEYS statement dumps the partition key from the projection online_sales.online_sales_fact_unseg_p:

=> SELECT DUMP_PROJECTION_PARTITION_KEYS('online_sales.online_sales_fact_unseg_p');

Partition keys on node v_vmart_node0001
  Projection 'online_sales_fact_unseg_p'
   Storage [ROS container]
     No of partition keys: 1
     Partition keys: 200
   Storage [ROS container]
     No of partition keys: 1
     Partition keys: 199
   ...
   Storage [ROS container]
     No of partition keys: 1
     Partition keys: 2
   Storage [ROS container]
     No of partition keys: 1
     Partition keys: 1

 Partition keys on node v_vmart_node0002
  Projection 'online_sales_fact_unseg_p'
   Storage [ROS container]
     No of partition keys: 1
     Partition keys: 200
   Storage [ROS container]
     No of partition keys: 1
     Partition keys: 199
...
(1 row)

See Also