SHOW PARTITIONS
描述
SHOW PARTITIONS 语句用于列出表的 partitions。可以指定可选的分区规范以返回与提供的分区规范匹配的分区。
语法
SHOW PARTITIONS table_identifier [ partition_spec ]
参数
-
table_identifier
指定表名，可以选择使用数据库名称进行限定。
语法：
[ database_name. ] table_name -
partition_spec
一个可选参数，用于指定分区键值对的逗号分隔列表。指定后，将返回与分区规范匹配的分区。
语法：
PARTITION ( partition_col_name = partition_col_val [ , ... ] )
示例
-- create a partitioned table and insert a few rows.
USE salesdb;
CREATE TABLE customer(id INT, name STRING) PARTITIONED BY (state STRING, city STRING);
INSERT INTO customer PARTITION (state = 'CA', city = 'Fremont') VALUES (100, 'John');
INSERT INTO customer PARTITION (state = 'CA', city = 'San Jose') VALUES (200, 'Marry');
INSERT INTO customer PARTITION (state = 'AZ', city = 'Peoria') VALUES (300, 'Daniel');
-- Lists all partitions for table `customer`
SHOW PARTITIONS customer;
+----------------------+
| partition|
+----------------------+
| state=AZ/city=Peoria|
| state=CA/city=Fremont|
|state=CA/city=San Jose|
+----------------------+
-- Lists all partitions for the qualified table `customer`
SHOW PARTITIONS salesdb.customer;
+----------------------+
| partition|
+----------------------+
| state=AZ/city=Peoria|
| state=CA/city=Fremont|
|state=CA/city=San Jose|
+----------------------+
-- Specify a full partition spec to list specific partition
SHOW PARTITIONS customer PARTITION (state = 'CA', city = 'Fremont');
+---------------------+
| partition|
+---------------------+
|state=CA/city=Fremont|
+---------------------+
-- Specify a partial partition spec to list the specific partitions
SHOW PARTITIONS customer PARTITION (state = 'CA');
+----------------------+
| partition|
+----------------------+
| state=CA/city=Fremont|
|state=CA/city=San Jose|
+----------------------+
-- Specify a partial spec to list specific partition
SHOW PARTITIONS customer PARTITION (city = 'San Jose');
+----------------------+
| partition|
+----------------------+
|state=CA/city=San Jose|
+----------------------+