项目上需要整理目前数据库的数据字典文档。项目不规范，这种文档只要后期来补。这么多张表，每个字段都写到word文档里真心头大。就算前面写了个查询表结构的sql，但是最后整理到word里还是感觉有点麻烦。以前写过一个oracle直接生成表结构的html文档，所以现在也想再弄个postgresql 版本的。查了一番文档，发现pg9.4不支持写文件。无奈放弃。最后选了一个这种方案，利用sql脚本中打印消息的功能。把生成的html文档打印出来，最后拷贝html文档代码到文本文件中保存，虽然比oracle那个麻烦了点，总算能得到想要的html文档了。
slq脚本：
--1.0 --2015-11-30 --postgresql-9.4.5 --打印出数据字典html --执行完毕，在pgAdmin的消息窗口，把打印内容拷贝到文本文件中，替换掉多余的输出：[PGSCRIPT ] ，删除头部的[QUERY ]及打印出的查询语句， --最后把文件另存为.html文件。 --用浏览器打开保存的网页，然后拷贝页面内容到word文档中，下面整理格式就可以了 --注意： --脚本里包含了详细版，和简版两个版本的数据字典，使用的时候注意切换到对应的标题 --'<tr><td>列名</td><td>类型</td><td>长度</td><td>主键约束</td><td>唯一约束</td><td>外键约束</td><td>可否为空</td><td>描述</td></tr>'; --'<tr><td>列名</td><td>类型</td><td>描述</td></tr>'; --2016-2-16 修正表字段注释(描述)为空，字段不打印的问题 begin --查询表名 set @table = select distinct relname, relname||'('||(select description from pg_description where objoid = oid and objsubid = 0) ||'表'||')' as table_name from pg_class c,pg_attribute a where c.oid=a.attrelid and attstattarget=-1 and attrelid in(select oid from pg_class where relname in (select relname as table_name from pg_class where relkind='r' and relname like 'exg_%' order by relname)) order by table_name; --数据字典(详细版)：列名 类型 长度 主键约束 唯一约束 外键约束 可否为空 描述 set @att = select (select relname from pg_class where oid=a.attrelid) as table_name, a.attname, format_type(a.atttypid,a.atttypmod), (case when atttypmod-4>0 then atttypmod-4 else 0 end), (case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='p')>0 then 'Y' else 'N' end), (case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='u')>0 then 'Y' else 'N' end), (case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='f')>0 then 'Y' else 'N' end), (case when a.attnotnull=true then 'Y' else 'N' end), col_description(a.attrelid,a.attnum) from pg_attribute a where attstattarget=-1 and attrelid in(select oid from pg_class where relname in (select relname as table_name from pg_class where relkind='r' and relname like 'exg_%' order by relname)) order by table_name,attnum; /* --数据字典(简版)：列名 类型 描述 set @att = select (select relname from pg_class where oid=a.attrelid) as table_name, ,a.attname ,format_type(a.atttypid,a.atttypmod) ,col_description(a.attrelid,a.attnum) from pg_attribute a where attstattarget=-1 and attrelid in(select oid from pg_class where relname in (select relname as table_name from pg_class where relkind='r' and relname like 'exg_%' order by relname)) order by table_name,attnum; */ --打印html文档 print '<!DOCTYPE html>'; print '<html>'; print '<head>'; print '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />'; print '<title>数据字典</title>'; print '<style type="text/css">'; print 'table { border-collapse: collapse; border-spacing: 0;}'; print 'table td {border: solid 1px #000;}'; print '</style>'; set @i=0; while @i < lines(@table) begin set @table_name = @table[@i][0]; print @table[@i][1]; print '<table>'; print '<tr><td>列名</td><td>类型</td><td>长度</td><td>主键约束</td><td>唯一约束</td><td>外键约束</td><td>可否为空</td><td>描述</td></tr>'; --print '<tr><td>列名</td><td>类型</td><td>描述</td></tr>'; set @j=0; while @j < lines(@att) begin if @att[@j][0] = @table_name begin --详细 print '<tr><td>'; print @att[@j][1]; print '</td><td>'; print @att[@j][2]; print '</td><td>'; print @att[@j][3]; print '</td><td>'; print @att[@j][4]; print '</td><td>'; print @att[@j][5]; print '</td><td>'; print @att[@j][6]; print '</td><td>'; print @att[@j][7]; print '</td><td>'; print @att[@j][8]; print '</td></tr>'; --简版 /*print '<tr><td>'; print @att[@j][1]; print '</td><td>'; print @att[@j][2]; print '</td><td>'; print @att[@j][3]; print '</td></tr>';*/ end set @j=@j+1; end print '</table>'; set @i=@i+1; end end --附： /* --数据字典--详细版 select (select relname ||'--'||(select description from pg_description where objoid = oid and objsubid = 0) from pg_class where oid=a.attrelid) as 表名, a.attname as 列名, format_type(a.atttypid,a.atttypmod) as 类型, (case when atttypmod-4>0 then atttypmod-4 else 0 end) as 长度, (case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='p')>0 then 'Y' else 'N' end) as 主键约束, (case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='u')>0 then 'Y' else 'N' end) as 唯一约束, (case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='f')>0 then 'Y' else 'N' end) as 外键约束, (case when a.attnotnull=true then 'Y' else 'N' end) as 可否为空, col_description(a.attrelid,a.attnum) as 描述 from pg_attribute a where attstattarget=-1 and attrelid in(select oid from pg_class where relname in (select relname as table_name from pg_class where relkind='r' and relname like 'exg_%' order by relname)) order by 表名,attnum; --数据字典--简版 select (select relname from pg_class where oid=a.attrelid) as table_name, (select (select description from pg_description where objoid = oid and objsubid = 0) ||'表'||'('||relname ||')' from pg_class where oid=a.attrelid) as 表名, a.attname as 列名, format_type(a.atttypid,a.atttypmod) as 类型, col_description(a.attrelid,a.attnum) as 描述 from pg_attribute a where attstattarget=-1 and attrelid in(select oid from pg_class where relname in (select relname as table_name from pg_class where relkind='r' and relname like 'exg_%' order by relname)) order by table_name,attnum; */