SHOW TABLE EXTENDED
描述
SHOW TABLE EXTENDED 将显示与给定正则表达式匹配的所有表的相关信息。输出内容包括基本表信息和文件系统信息，例如 上次访问时间、创建者、类型、提供程序、表属性、位置、Serde 库、InputFormat、OutputFormat、存储属性、分区提供程序、分区列 和 架构。
如果存在分区规范，则会输出给定分区的特定于文件系统的信息，例如 分区参数 和 分区统计信息。请注意，表正则表达式不能与分区规范一起使用。
语法
SHOW TABLE EXTENDED [ { IN | FROM } database_name ] LIKE regex_pattern
[ partition_spec ]
参数
-
{ IN
|FROM } database_name指定数据库名称。如果未提供，将使用当前数据库。
-
regex_pattern
指定用于过滤掉不需要的表的正则表达式模式。
- 除
*和|字符外，该模式的工作方式与正则表达式相同。 *单独匹配 0 个或多个字符，|用于分隔多个不同的正则表达式，其中任何一个都可以匹配。- 在处理之前，输入模式中的前导和尾随空格会被删除。模式匹配不区分大小写。
- 除
-
partition_spec
一个可选参数，用于指定以逗号分隔的分区键值对列表。请注意，表正则表达式不能与分区规范一起使用。
语法：
PARTITION ( partition_col_name = partition_col_val [ , ... ] )
示例
-- Assumes `employee` table created with partitioned by column `grade`
CREATE TABLE employee(name STRING, grade INT) PARTITIONED BY (grade);
INSERT INTO employee PARTITION (grade = 1) VALUES ('sam');
INSERT INTO employee PARTITION (grade = 2) VALUES ('suj');
-- Show the details of the table
SHOW TABLE EXTENDED LIKE 'employee';
+--------+---------+-----------+--------------------------------------------------------------+
|database|tableName|isTemporary| information |
+--------+---------+-----------+--------------------------------------------------------------+
|default |employee |false |Database: default
Table: employee
Owner: root
Created Time: Fri Aug 30 15:10:21 IST 2019
Last Access: Thu Jan 01 05:30:00 IST 1970
Created By: Spark 3.0.0-SNAPSHOT
Type: MANAGED
Provider: hive
Table Properties: [transient_lastDdlTime=1567158021]
Location: file:/opt/spark1/spark/spark-warehouse/employee
Serde Library: org.apache.hadoop.hive.serde2.lazy
.LazySimpleSerDe
InputFormat: org.apache.hadoop.mapred.TextInputFormat
OutputFormat: org.apache.hadoop.hive.ql.io
.HiveIgnoreKeyTextOutputFormat
Storage Properties: [serialization.format=1]
Partition Provider: Catalog
Partition Columns: [`grade`]
Schema: root
|-- name: string (nullable = true)
|-- grade: integer (nullable = true)
+--------+---------+-----------+--------------------------------------------------------------+
-- showing the multiple table details with pattern matching
SHOW TABLE EXTENDED LIKE 'employe*';
+--------+---------+-----------+--------------------------------------------------------------+
|database|tableName|isTemporary| information |
+--------+---------+-----------+--------------------------------------------------------------+
|default |employee |false |Database: default
Table: employee
Owner: root
Created Time: Fri Aug 30 15:10:21 IST 2019
Last Access: Thu Jan 01 05:30:00 IST 1970
Created By: Spark 3.0.0-SNAPSHOT
Type: MANAGED
Provider: hive
Table Properties: [transient_lastDdlTime=1567158021]
Location: file:/opt/spark1/spark/spark-warehouse/employee
Serde Library: org.apache.hadoop.hive.serde2.lazy
.LazySimpleSerDe
InputFormat: org.apache.hadoop.mapred.TextInputFormat
OutputFormat: org.apache.hadoop.hive.ql.io
.HiveIgnoreKeyTextOutputFormat
Storage Properties: [serialization.format=1]
Partition Provider: Catalog
Partition Columns: [`grade`]
Schema: root
|-- name: string (nullable = true)
|-- grade: integer (nullable = true)
|default |employee1|false |Database: default
Table: employee1
Owner: root
Created Time: Fri Aug 30 15:22:33 IST 2019
Last Access: Thu Jan 01 05:30:00 IST 1970
Created By: Spark 3.0.0-SNAPSHOT
Type: MANAGED
Provider: hive
Table Properties: [transient_lastDdlTime=1567158753]
Location: file:/opt/spark1/spark/spark-warehouse/employee1
Serde Library: org.apache.hadoop.hive.serde2.lazy
.LazySimpleSerDe
InputFormat: org.apache.hadoop.mapred.TextInputFormat
OutputFormat: org.apache.hadoop.hive.ql.io
.HiveIgnoreKeyTextOutputFormat
Storage Properties: [serialization.format=1]
Partition Provider: Catalog
Schema: root
|-- name: string (nullable = true)
+--------+---------+----------+---------------------------------------------------------------+
-- show partition file system details
SHOW TABLE EXTENDED IN default LIKE 'employee' PARTITION (grade=1);
+--------+---------+-----------+--------------------------------------------------------------+
|database|tableName|isTemporary| information |
+--------+---------+-----------+--------------------------------------------------------------+
|default |employee |false |Partition Values: [grade=1]
Location: file:/opt/spark1/spark/spark-warehouse/employee
/grade=1
Serde Library: org.apache.hadoop.hive.serde2.lazy
.LazySimpleSerDe
InputFormat: org.apache.hadoop.mapred.TextInputFormat
OutputFormat: org.apache.hadoop.hive.ql.io
.HiveIgnoreKeyTextOutputFormat
Storage Properties: [serialization.format=1]
Partition Parameters: {rawDataSize=-1, numFiles=1,
transient_lastDdlTime=1567158221, totalSize=4,
COLUMN_STATS_ACCURATE=false, numRows=-1}
Created Time: Fri Aug 30 15:13:41 IST 2019
Last Access: Thu Jan 01 05:30:00 IST 1970
Partition Statistics: 4 bytes
|
+--------+---------+-----------+--------------------------------------------------------------+
-- show partition file system details with regex fails as shown below
SHOW TABLE EXTENDED IN default LIKE 'empl*' PARTITION (grade=1);
Error: Error running query: org.apache.spark.sql.catalyst.analysis.NoSuchTableException:
Table or view 'emplo*' not found in database 'default'; (state=,code=0)