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FUSE_SEGMENT

Returns the segment information of a specified table snapshot. For more information about what is segment in Databend, see What are Snapshot, Segment, and Block?.

See Also:

Syntax

FUSE_SEGMENT('<database_name>', '<table_name>','<snapshot_id>')

Examples

CREATE TABLE mytable(c int);
INSERT INTO mytable values(1);
INSERT INTO mytable values(2);

-- Obtain a snapshot ID
SELECT snapshot_id FROM FUSE_SNAPSHOT('default', 'mytable') limit 1;

---
+----------------------------------+
| snapshot_id |
+----------------------------------+
| 82c572947efa476892bd7c0635158ba2 |
+----------------------------------+

SELECT * FROM FUSE_SEGMENT('default', 'mytable', '82c572947efa476892bd7c0635158ba2');

---
+----------------------------------------------------+----------------+-------------+-----------+--------------------+------------------+
| file_location | format_version | block_count | row_count | bytes_uncompressed | bytes_compressed |
+----------------------------------------------------+----------------+-------------+-----------+--------------------+------------------+
| 1/319/_sg/d35fe7bf99584301b22e8f6a8a9c97f9_v1.json | 1 | 1 | 1 | 4 | 184 |
| 1/319/_sg/c261059d47c840e1b749222dabb4b2bb_v1.json | 1 | 1 | 1 | 4 | 184 |
+----------------------------------------------------+----------------+-------------+-----------+--------------------+------------------+