PG版本：
PostgreSQL 11.11
存储过程：
create or replace function get_tab_ddl(tab_name varchar)returns text as $$declare
--定义变量 tab_ddl text; curs refcursor; tmp_col record; tab_info record;begin --获取表的pid、schema信息 open curs for SELECT c.oid,n.nspname,c.relname FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE c.relname ~ ('^('||tab_name||')$')AND pg_catalog.pg_table_is_visible(c.oid) ORDER BY 2,3; fetch curs into tmp_col; --判断是否存在该表 if tmp_col.oid is null then return 'Table "'||tab_name||'" was not queried'; end if; --如表存在，获取游戏列表信息 FOR tab_info IN SELECT a.attname as col_name, pg_catalog.format_type(a.atttypid, a.atttypmod) as col_type, CASE WHEN (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128) FROM pg_catalog.pg_attrdef d WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef) IS NOT NULL THEN 'DEFAULT '|| (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128) FROM pg_catalog.pg_attrdef d WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef) ELSE '' END as col_default_value, CASE WHEN a.attnotnull = true THEN 'NOT NULL' ELSE 'NULL' END as col_not_null, a.attnum as attnum, e.max_attnum as max_attnum FROM pg_catalog.pg_attribute a INNER JOIN (SELECT a.attrelid, max(a.attnum) as max_attnum FROM pg_catalog.pg_attribute a WHERE a.attnum > 0 AND NOT www.cungun.coma.attisdropped GROUP BY a.attrelid) e ON a.attrelid=e.attrelid WHERE a.attnum > 0 AND a.attrelid=tmp_col.oid AND NOT a.attisdropped ORDER BY a.attnum --拼接为ddl语句 LOOP IF tab_info.attnum = 1 THEN tab_ddl:='CREATE TABLE '||tmp_col.nspname||'.'||tmp_col.relname||' ('; ELSE tab_ddl:=tab_ddl||','; END IF; IF tab_info.attnum <= tab_info.max_attnum THEN tab_ddl:=tab_ddl||chr(10)||' '||tab_info.col_name||' '||tab_info.col_type||' '||tab_info.col_default_value||' '||tab_info.col_not_null; END IF; END LOOP; tab_ddl:=tab_ddl||');'; --输出结果 RETURN tab_ddl;end;$$ language plpgsql; 游戏列表用法：
select get_tab_ddl('table_name');