TABLE METADATA

最近更新时间:2023-03-08 16:30:43

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说明

支持内核:SparkSQL。
适用表类型:原生 Iceberg 表。
用途:支持四段式的 Iceberg 表元数据查询,包括:history、snapshots、files、manifests。

语法

SELECT select_expr (, select_expr)*
FROM `Catalog`.`db`.`tableName${history|snapshots|files|manifests|partitions|all_data_files|all_manifests}`
[WHERE where_condition]
[LIMIT [offset,] rows]

示例

SELECT * FROM `DataLakeCatalog`.`validation`.`dempts$history` ORDER BY snapshot_id DESC LIMIT 1;
SELECT * FROM `DataLakeCatalog`.`validation`.`dempts$snapshots` ORDER BY snapshot_id LIMIT 1;
SELECT * FROM `DataLakeCatalog`.`validation`.`dempts$files` ORDER BY file_size_in_bytes LIMIT 1;
SELECT * FROM `DataLakeCatalog`.`validation`.`dempts$manifests` ORDER BY length LIMIT 1;
SELECT * FROM `DataLakeCatalog`.`validation`.`dempts$partitions` LIMIT 10;
SELECT * FROM `DataLakeCatalog`.`validation`.`dempts$all_data_files` LIMIT 10;
SELECT * FROM `DataLakeCatalog`.`validation`.`dempts$all_manifests` LIMIT 10;