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v3.0

Documentation:v3.0

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Usage

Syntax

  • Create a full materialized view.

    CREATE MATERIALIZED VIEW [ view_name ] AS { query_block };
  • Fullly refresh a materialized view.

    REFRESH MATERIALIZED VIEW [ view_name ];
  • Delete a materialized view.

    DROP MATERIALIZED VIEW [ view_name ];
  • Query a materialized view.

    SELECT * FROM [ view_name ];

Examples

-- Prepare data.
MogDB=# CREATE TABLE t1(c1 int, c2 int);
MogDB=# INSERT INTO t1 VALUES(1, 1);
MogDB=# INSERT INTO t1 VALUES(2, 2);

-- Create a full materialized view.
MogDB=# CREATE MATERIALIZED VIEW mv AS select count(*) from t1;

-- Query the materialized view result.
MogDB=# SELECT * FROM mv;
 count
-------
     2
(1 row)

-- Insert data into the base table in the materialized view.
MogDB=# INSERT INTO t1 VALUES(3, 3);

-- Fully refresh a full materialized view.
MogDB=# REFRESH MATERIALIZED VIEW mv;

-- Query the materialized view result.
MogDB=# SELECT * FROM mv;
 count
-------
     3
(1 row)

-- Delete a materialized view.
MogDB=# DROP MATERIALIZED VIEW mv;
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