文件

描述

您可以使用 SQL 直接查询具有指定格式的文件。

语法

file_format.`file_path`

参数

示例

-- PARQUET file
SELECT * FROM parquet.`examples/src/main/resources/users.parquet`;
+------+--------------+----------------+
|  name|favorite_color|favorite_numbers|
+------+--------------+----------------+
|Alyssa|          null|  [3, 9, 15, 20]|
|   Ben|           red|              []|
+------+--------------+----------------+

-- ORC file
SELECT * FROM orc.`examples/src/main/resources/users.orc`;
+------+--------------+----------------+
|  name|favorite_color|favorite_numbers|
+------+--------------+----------------+
|Alyssa|          null|  [3, 9, 15, 20]|
|   Ben|           red|              []|
+------+--------------+----------------+

-- JSON file
SELECT * FROM json.`examples/src/main/resources/people.json`;
+----+-------+
| age|   name|
+----+-------+
|null|Michael|
|  30|   Andy|
|  19| Justin|
+----+-------+