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[数据库]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>';  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      print @att[@j][1];      end      set @j=@j+1;    end    print '</table>';    set @i=@i+1;  endend--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;*/