catalogs
Name
catalogs
description
表函数，生成 catalogs 临时表，可以查看当前doris中的创建的 catalogs 信息。
该函数用于 from 子句中。
syntax
catalogs()
catalogs()表结构：
mysql> desc function catalogs();
+-------------+--------+------+-------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------+------+-------+---------+-------+
| CatalogId | BIGINT | No | false | NULL | NONE |
| CatalogName | TEXT | No | false | NULL | NONE |
| CatalogType | TEXT | No | false | NULL | NONE |
| Property | TEXT | No | false | NULL | NONE |
| Value | TEXT | No | false | NULL | NONE |
+-------------+--------+------+-------+---------+-------+
5 rows in set (0.04 sec)catalogs() tvf展示的信息是综合了 show catalogs 与 show catalog xxx 语句的结果。
可以利用tvf生成的表去做过滤、join等操作。
example
mysql> select * from catalogs();
+-----------+-------------+-------------+--------------------------------------------+---------------------------------------------------------------------------+
| CatalogId | CatalogName | CatalogType | Property | Value |
+-----------+-------------+-------------+--------------------------------------------+---------------------------------------------------------------------------+
| 16725 | hive | hms | dfs.client.failover.proxy.provider.HANN | org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider |
| 16725 | hive | hms | dfs.ha.namenodes.HANN | nn1,nn2 |
| 16725 | hive | hms | create_time | 2023-07-13 16:24:38.968 |
| 16725 | hive | hms | ipc.client.fallback-to-simple-auth-allowed | true |
| 16725 | hive | hms | dfs.namenode.rpc-address.HANN.nn1 | nn1_host:rpc_port |
| 16725 | hive | hms | hive.metastore.uris | thrift://127.0.0.1:7004 |
| 16725 | hive | hms | dfs.namenode.rpc-address.HANN.nn2 | nn2_host:rpc_port |
| 16725 | hive | hms | type | hms |
| 16725 | hive | hms | dfs.nameservices | HANN |
| 0 | internal | internal | NULL | NULL |
| 16726 | es | es | create_time | 2023-07-13 16:24:44.922 |
| 16726 | es | es | type | es |
| 16726 | es | es | hosts | http://127.0.0.1:9200 |
+-----------+-------------+-------------+--------------------------------------------+---------------------------------------------------------------------------+
13 rows in set (0.01 sec)keywords
catalogs