SHOW TBLPROPERTIES

描述

此语句返回给定属性键的可选值的表属性值。 如果未指定键,则返回所有属性。

语法

SHOW TBLPROPERTIES table_identifier 
   [ ( unquoted_property_key | property_key_as_string_literal ) ]

参数

注意

示例

-- create a table `customer` in database `salesdb`
USE salesdb;
CREATE TABLE customer(cust_code INT, name VARCHAR(100), cust_addr STRING)
    TBLPROPERTIES ('created.by.user' = 'John', 'created.date' = '01-01-2001');

-- show all the user specified properties for table `customer`
SHOW TBLPROPERTIES customer;
+---------------------+----------+
|                  key|     value|
+---------------------+----------+
|      created.by.user|      John|
|         created.date|01-01-2001|
|transient_lastDdlTime|1567554931|
+---------------------+----------+

-- show all the user specified properties for a qualified table `customer`
-- in database `salesdb`
SHOW TBLPROPERTIES salesdb.customer;
+---------------------+----------+
|                  key|     value|
+---------------------+----------+
|      created.by.user|      John|
|         created.date|01-01-2001|
|transient_lastDdlTime|1567554931|
+---------------------+----------+

-- show value for unquoted property key `created.by.user`
SHOW TBLPROPERTIES customer (created.by.user);
+-----+
|value|
+-----+
| John|
+-----+

-- show value for property `created.date`` specified as string literal
SHOW TBLPROPERTIES customer ('created.date');
+----------+
|     value|
+----------+
|01-01-2001|
+----------+