[Oracle]根据字段值全库搜索相关数据表和字段

时间：2022-03-13 22:54

这个需求比较冷门，但对于在某些特定的情况下，还是会有这样的需要的。好在Oracle实现还比较方便，用存储过程则轻松实现。

查询字符串：

create or replace procedure search_string(pString in varchar) as
  cursor all_tab_cursor is
    select a.owner, a.table_name, b.column_name
      from dba_tables a, dba_tab_columns b, dba_objects c
     where a.owner = b.owner
       and a.table_name = b.table_name
       and a.table_name = c.object_name
       --and a.owner in (‘XXX‘) --用户可选
       and b.data_type in (‘VARCHAR2‘,‘CHAR‘,‘CLOB‘,‘NCHAR‘,‘NCLOB‘,‘NVARCHAR2‘)
       and c.object_type = ‘TABLE‘
       order by a.owner,a.table_name,b.column_id;
  refAllTab all_tab_cursor%rowtype;

  --------------

  sSql   varchar(4000);
  nCount number;

begin
  DBMS_OUTPUT.Enable(4000000);

  open all_tab_cursor;
  loop
    fetch all_tab_cursor
      into refAllTab;
    exit when all_tab_cursor%notfound;
  
    sSql := ‘SELECT COUNT(1) FROM ‘ || refAllTab.Owner || ‘.‘ ||
            refAllTab.Table_Name || ‘ WHERE ‘ || refAllTab.Column_Name ||
            ‘ LIKE ‘‘%‘ || pString || ‘%‘‘‘;
    --DBMS_OUTPUT.PUT_LINE(sSql);
    execute immediate sSql
      into nCount;
  
    if nCount > 0 then
      DBMS_OUTPUT.PUT_LINE(refAllTab.Owner || ‘.‘ || refAllTab.Table_Name || ‘.‘ ||
                           refAllTab.Column_Name || ‘ = ‘ || nCount);
    end if;
  
  end loop;
  close all_tab_cursor;
end search_string;

查询数字：

create or replace procedure search_number(pNumber in number) as
  cursor all_tab_cursor is
    select a.owner, a.table_name, b.column_name
      from dba_tables a, dba_tab_columns b, dba_objects c
     where a.owner = b.owner
       and a.table_name = b.table_name
       and a.table_name = c.object_name
       --and a.owner in (‘XXX‘) --用户可选
       and b.data_type in (‘FLOAT‘,‘NUMBER‘)
       and c.object_type = ‘TABLE‘
       order by a.owner,a.table_name,b.column_id;
  refAllTab all_tab_cursor%rowtype;

  --------------

  sSql   varchar(4000);
  nCount number;

begin
  DBMS_OUTPUT.Enable(4000000);

  open all_tab_cursor;
  loop
    fetch all_tab_cursor
      into refAllTab;
    exit when all_tab_cursor%notfound;

    sSql := ‘SELECT COUNT(1) FROM ‘ || refAllTab.Owner || ‘.‘ ||
            refAllTab.Table_Name || ‘ WHERE ‘ || refAllTab.Column_Name ||
            ‘ = ‘ || pNumber;
    --DBMS_OUTPUT.PUT_LINE(sSql);
    execute immediate sSql
      into nCount;

    if nCount > 0 then
      DBMS_OUTPUT.PUT_LINE(refAllTab.Owner || ‘.‘ || refAllTab.Table_Name || ‘.‘ ||
                           refAllTab.Column_Name || ‘ = ‘ || nCount);
    end if;

  end loop;
  close all_tab_cursor;
end search_number;

查询范围数字：

create or replace procedure search_number_between(pStartNumber in number, pEndNumber in number) as
  cursor all_tab_cursor is
    select a.owner, a.table_name, b.column_name
      from dba_tables a, dba_tab_columns b, dba_objects c
     where a.owner = b.owner
       and a.table_name = b.table_name
       and a.table_name = c.object_name
       --and a.owner in (‘XXX‘)  --用户可选
       and b.data_type in (‘FLOAT‘,‘NUMBER‘)
       and c.object_type = ‘TABLE‘
       order by a.owner,a.table_name,b.column_id;
  refAllTab all_tab_cursor%rowtype;

  --------------

  sSql   varchar(4000);
  nCount number;

begin
  DBMS_OUTPUT.Enable(4000000);

  open all_tab_cursor;
  loop
    fetch all_tab_cursor
      into refAllTab;
    exit when all_tab_cursor%notfound;

    sSql := ‘SELECT COUNT(1) FROM ‘ || refAllTab.Owner || ‘.‘ ||
            refAllTab.Table_Name || ‘ WHERE ‘ || refAllTab.Column_Name ||
            ‘ BETWEEN ‘ || pStartNumber || ‘ AND ‘ || pEndNumber;
    --DBMS_OUTPUT.PUT_LINE(sSql);
    execute immediate sSql
      into nCount;

    if nCount > 0 then
      DBMS_OUTPUT.PUT_LINE(refAllTab.Owner || ‘.‘ || refAllTab.Table_Name || ‘.‘ ||
                           refAllTab.Column_Name || ‘ = ‘ || nCount);
    end if;

  end loop;
  close all_tab_cursor;
end search_number_between;

查询日期：

create or replace procedure search_date(pToDateString in varchar) as
  cursor all_tab_cursor is
    select a.owner, a.table_name, b.column_name
      from dba_tables a, dba_tab_columns b, dba_objects c
     where a.owner = b.owner
       and a.table_name = b.table_name
       and a.table_name = c.object_name
       --and a.owner in (‘XXX‘)  --用户可选
       and (b.data_type = ‘DATE‘ or b.data_type like ‘TIMESTAMP%‘)
       and c.object_type = ‘TABLE‘
     order by a.owner, a.table_name, b.column_id;
  refAllTab all_tab_cursor%rowtype;

  --------------

  sSql   varchar(4000);
  nCount number;

begin
  DBMS_OUTPUT.Enable(4000000);

  open all_tab_cursor;
  loop
    fetch all_tab_cursor
      into refAllTab;
    exit when all_tab_cursor%notfound;
  
    sSql := ‘SELECT COUNT(1) FROM ‘ || refAllTab.Owner || ‘.‘ ||
            refAllTab.Table_Name || ‘ WHERE ‘ || refAllTab.Column_Name ||
            ‘ = ‘ || pToDateString;
    --DBMS_OUTPUT.PUT_LINE(sSql);
    execute immediate sSql
      into nCount;
  
    if nCount > 0 then
      DBMS_OUTPUT.PUT_LINE(refAllTab.Owner || ‘.‘ || refAllTab.Table_Name || ‘.‘ ||
                           refAllTab.Column_Name || ‘ = ‘ || nCount);
    end if;
  
  end loop;
  close all_tab_cursor;
end search_date;

查询范围日期：

create or replace procedure search_date_between(pStartToDateString in varchar, pEndToDateString in varchar) as
  cursor all_tab_cursor is
    select a.owner, a.table_name, b.column_name
      from dba_tables a, dba_tab_columns b, dba_objects c
     where a.owner = b.owner
       and a.table_name = b.table_name
       and a.table_name = c.object_name
       --and a.owner in (‘XXX‘)  --用户可选
       and (b.data_type = ‘DATE‘ or b.data_type like ‘TIMESTAMP%‘)
       and c.object_type = ‘TABLE‘
     order by a.owner, a.table_name, b.column_id;
  refAllTab all_tab_cursor%rowtype;

  --------------

  sSql   varchar(4000);
  nCount number;

begin
  DBMS_OUTPUT.Enable(4000000);

  open all_tab_cursor;
  loop
    fetch all_tab_cursor
      into refAllTab;
    exit when all_tab_cursor%notfound;

    sSql := ‘SELECT COUNT(1) FROM ‘ || refAllTab.Owner || ‘.‘ ||
            refAllTab.Table_Name || ‘ WHERE ‘ || refAllTab.Column_Name ||
            ‘ BETWEEN ‘ || pStartToDateString || ‘ AND ‘ || pEndToDateString;
    --DBMS_OUTPUT.PUT_LINE(sSql);
    execute immediate sSql
      into nCount;

    if nCount > 0 then
      DBMS_OUTPUT.PUT_LINE(refAllTab.Owner || ‘.‘ || refAllTab.Table_Name || ‘.‘ ||
                           refAllTab.Column_Name || ‘ = ‘ || nCount);
    end if;

  end loop;
  close all_tab_cursor;
end search_date_between;

执行范例：

exec search_string(‘测试‘);

exec search_number(100);

exec search_number_between(100, 200);

exec search_date(‘to_char(‘‘2013-01-01‘‘,‘‘yyyy-mm-dd‘‘)‘);

exec search_date_between(‘to_char(‘‘2013-01-01‘‘,‘‘yyyy-mm-dd‘‘)‘,‘to_char(‘‘2014-01-01‘‘,‘‘yyyy-mm-dd‘‘)‘);

以上存储过程执行完毕后，会输出格式文本：用户.表名.字段名 = 记录数，应用时根据实际情况修改。

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