PostgreSQL 导出数据字典文档

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>';
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,
            '<tr><td>'||a.attname||'</td>'
            ||'<td>'||format_type(a.atttypid,a.atttypmod)||'</td>'
            ||'<td>'||(case when atttypmod-4>0 then atttypmod-4 else 0 end)||'</td>'
            ||'<td>'||(case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='p')>0 then 'Y' else 'N' end)||'</td>'
            ||'<td>'||(case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='u')>0 then 'Y' else 'N' end)||'</td>'
            ||'<td>'||(case when (select count(*) from pg_constraint where conrelid=a.attrelid and conkey[1]=attnum and contype='f')>0 then 'Y' else 'N' end)||'</td>'
            ||'<td>'||(case when a.attnotnull=true then 'Y' else 'N' end)||'</td>'
            ||'<td>'||col_description(a.attrelid,a.attnum)||'</td></tr>'
            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,
            '<tr><td>'||a.attname||'</td>'
            ||'<td>'||format_type(a.atttypid,a.atttypmod)||'</td>'
            ||'<td>'||col_description(a.attrelid,a.attnum)||'</td></tr>'
            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>';

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