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CLUSTERING_INFORMATION

Returns clustering information of a table.

Syntax​

CLUSTERING_INFORMATION(‘<database_name>’, ‘<table_name>’)

Examples​

CREATE TABLE mytable(a int, b int) CLUSTER BY(a+1);

INSERT INTO mytable VALUES(1,1),(3,3);
INSERT INTO mytable VALUES(2,2),(5,5);
INSERT INTO mytable VALUES(4,4);

SELECT * FROM CLUSTERING_INFORMATION('default','mytable')\G
*************************** 1. row ***************************
        cluster_by_keys: ((a + 1))
      total_block_count: 3
   constant_block_count: 1
unclustered_block_count: 0
       average_overlaps: 1.3333
          average_depth: 2.0
  block_depth_histogram: {"00002":3}