常用数据库获取表，视图，列，索引信息

一、分页获取数据库用户的所有表

(1)、Oracle，OceanBase(Oracle内核版)，DM

使用ALL_TABLES，需要添加当前用户作为查询条件

select a3.* from (select a2.* from  (select  a1.*, rownum rn1 from (
select t1.table_name, t2.comments from ALL_TABLES t1, ALL_TAB_COMMENTS t2 WHERE t1.table_name = t2.table_name and upper(t1.owner) = upper(?)
) a1) a2 where rn1 <= 10 ) a3 where rn1 >= 1;

使用USER_TABLES，直接就可以查到当前用户下的表

select a3.* from (select a2.* from  (select  a1.*, rownum rn1 from (
select t1.table_name, t2.comments from USER_TABLES t1, USER_TAB_COMMENTS t2 WHERE t1.table_name = t2.table_name
) a1) a2 where rn1 <= 10 ) a3 where rn1 >= 1;

(2)、MySQL

select t.* from (select table_name,table_type,TABLE_COMMENT from INFORMATION_SCHEMA.TABLES where upper(table_schema) = upper(?) and table_type = 'BASE TABLE') t limit 1,10;

(3)、gaussdb

select t.* from (select table_name,table_type from INFORMATION_SCHEMA.TABLES where upper(table_catalog) = upper(?) and table_type = 'BASE TABLE') t limit 10 offset 1;

(4)、PostgreSQL

select t.* from (select table_name,table_type from INFORMATION_SCHEMA.TABLES where upper(table_schema) = upper(?) and table_type = 'BASE TABLE') t limit 10 offset 1;

二、分页获取数据库用户的所有视图

(1)、Oracle，OceanBase(Oracle内核版)，DM

使用ALL_TABLES，需要添加当前用户作为查询条件

select a3.* from (select a2.* from  (select  a1.*, rownum rn1 from (
select t1.view_name, t2.comments from ALL_VIEWS t1, ALL_TAB_COMMENTS t2 WHERE t1.view_name = t2.table_name and upper(t1.owner) = upper(?)
) a1) a2 where rn1 <= 10 ) a3 where rn1 >= 1;

使用USER_TABLES，直接就可以查到当前用户下的表

select a3.* from (select a2.* from  (select  a1.*, rownum rn1 from (
select t1.view_name, t2.comments from USER_VIEWS t1, USER_TAB_COMMENTS t2 WHERE t1.view_name = t2.table_name
) a1) a2 where rn1 <= 10 ) a3 where rn1 >= 1;

(2)、MySQL

select t.* from (select table_name,table_type,TABLE_COMMENT from INFORMATION_SCHEMA.TABLES where upper(table_schema) = upper(?) and table_type = 'VIEW') t limit 1,10;

(3)、gaussdb

select t.* from (select table_name,table_type from INFORMATION_SCHEMA.TABLES where upper(table_catalog) = upper(?) and table_type = 'VIEW') t limit 10 offset 1;

(4)、PostgreSQL

select t.* from (select table_name,table_type from INFORMATION_SCHEMA.TABLES where upper(table_schema) = upper(?) and table_type = 'VIEW') t limit 10 offset 1;

三、查询数据库用户表的列信息

(1)、Oracle，OceanBase(Oracle内核版)，DM

使用ALL_TAB_COLUMNS，需要添加当前用户作为查询条件

select * from ALL_TAB_COLUMNS where upper(table_name) = upper(?) and upper(owner) = upper(?);

使用USER_TAB_COLUMNS，直接就可以查到当前用户下的表

select * from USER_TAB_COLUMNS where upper(table_name) = upper(?);

(2)、MySQL，gaussdb

select * from information_schema.COLUMNS where upper(table_name) = upper(?) and upper(table_schema) = upper(?);

(3)、PostgreSQL

select * from information_schema.COLUMNS where upper(table_name) = upper(?) and upper(table_catalog) = upper(?);

四、获取数据库用户的所有表索引

(1)、Oracle，OceanBase(Oracle内核版)，DM

使用ALL_IND_COLUMNS，需要添加当前用户作为查询条件

select * from ALL_IND_COLUMNS where upper(table_name) = upper(?) AND upper(index_owner) = upper(?);

使用USER_IND_COLUMNS，直接就可以查到当前用户下的表

select * from USER_IND_COLUMNS where upper(table_name) = upper(?);

(2)、MySQL

select * from INFORMATION_SCHEMA.STATISTICS where upper(table_name) = upper(?) and upper(table_schema) = upper(?);

(3)、gaussdb，PostgreSQL

select * from pg_indexes t where upper(tablename) = upper(?) and upper(schemaname) = upper(?);