pg_class pg_class表记载表和几乎所有有字段或者是那些类似表的东西。 包括索引(不过还要参阅pg_index)、序列、视图、物化视图、 复合类型和一些特殊关系类型;参阅relkind。在下面, 当指所有这些对象的时候说"关系"(relations)。不是所有字段对所有关系类型都有意义。 表47-11.pg_class字段 pg_class中的几个布尔...
select c.relname 表名,cast(obj_description(relfilenode,'pg_class') as varchar) 名称,a.attname 字段,d.description 字段备注,concat_ws('',t.typname,SUBSTRING(format_type(a.atttypid,a.atttypmod) from '\(.*\)')) as 列类型 from pg_class c,pg_attribute a,pg_type t,pg_description d ...
一、利用表数据信息查询表和字段信息 (一)从pg_tables中查询表信息 select tablename from pg_tables where schemaname='ap' and tablename SIMILAR TO 'dwd_[a-z,_]+_[0-9]+' (二)从pg_class和pg_attribute根据指定的表名查询字段信息 SELECT C.relname, A.attname AS NAME, A.attnotnull AS NOTN...
pgsql也是面向对象的,看pg_class就知道,该表内记录了pgsql中的所有对象(表、视图、主键…),其中查询普通表对象的脚本是: select * from pg_class where relkind='r'; 1. pg_namespace 表的命名空间信息,即表的schema名字。 --查询表命名空间 select a.oid,a.relname,b.nspname,concat(b.nspname,'.',...
hastriggers pg_class.relhastriggers True if table has (or once had) triggers pg_attribute 用来存放字段信息 attname:字段名 col_description ( A.attrelid, A.attnum ) AS COMMENT:字段注释 attrelid:字段对应的表id(与class中的oid关联) pg_description 用来存储数据库对象(如字段、表)的描述(注释)...
.conrelid = pg_class.oid inner join pg_attribute on pg_attribute.attrelid = pg_class.oid and pg_attribute.attnum = any(pg_constraint.conkey) inner join pg_type on pg_type.oid = pg_attribute.atttypid where pg_class.relname = c.relname and pg_constraint.contype = 'p' and pg_...
pg_class.relname as 表名, cast(obj_description(pg_class.relfilenode,'pg_class') as varchar) as 表中文描述, '' as 表类型, '' as 表创建时间, pg_attribute.attnum as 字段编号, pg_attribute.attname as 字段名, col_description(pg_attribute.attrelid,pg_attribute.attnum) as 字段描述, ...
v_recRECORD;v_key varchar;BEGINSELECTpg_class.oidINTOv_oidFROMpg_classINNERJOINpg_namespaceON(pg_class.relnamespace=pg_namespace.oidANDlower(pg_namespace.nspname)=a_schema_name)WHEREpg_class.relname=a_table_name;IFNOTFOUNDTHENRETURN;ENDIF;v_sql='SELECTpg_attribute.attnameASfields_name,pg_...
网络数据层类 网络释义 1. 数据层类 清单1 PostgreSQL 的数据层类(pgsql.class.php) <?php class pgsql { private $linkid; // PostgreSQL 连接标识符 private $host;... wenku.baidu.com|基于2个网页
When using osm2pgsql to import massachusetts-latest.osm.bz2 into PostGIS 2.0.1 database osm (running on PostgreSQL 9.1 on an Ubuntu 12.04), I get the error failed: ERROR: operator class "gist_geometry_ops" does not exist for access method "gist". I have ran the e...