FUSE_COLUMN
返回表的最新或指定快照的列信息。有关 Databend 中块的更多信息，请参阅 什么是快照、段和块？。
另请参阅：
语法
FUSE_COLUMN('<database_name>', '<table_name>'[, '<snapshot_id>'])
示例
CREATE TABLE mytable(c int);
INSERT INTO mytable values(1);
INSERT INTO mytable values(2);
SELECT * FROM FUSE_COLUMN('default', 'mytable');
---
+----------------------------------+----------------------------+---------------------------------------------------------+------------+-----------+-----------+-------------+-------------+-----------+--------------+------------------+
| snapshot_id | timestamp | block_location | block_size | file_size | row_count | column_name | column_type | column_id | block_offset | bytes_compressed |
+----------------------------------+----------------------------+---------------------------------------------------------+------------+-----------+-----------+-------------+-------------+-----------+--------------+------------------+
| 3faefc1a9b6a48f388a8b59228dd06c1 | 2023-07-18 03:06:30.276502 | 1/118746/_b/44df130c207745cb858928135d39c1c0_v2.parquet | 4 | 196 | 1 | c | Int32 | 0 | 8 | 14 |
| 3faefc1a9b6a48f388a8b59228dd06c1 | 2023-07-18 03:06:30.276502 | 1/118746/_b/b6f8496d7e3f4f62a89c09572840cf70_v2.parquet | 4 | 196 | 1 | c | Int32 | 0 | 8 | 14 |
+----------------------------------+----------------------------+---------------------------------------------------------+------------+-----------+-----------+-------------+-------------+-----------+--------------+------------------+
