PreparedStatement中in子句的处理


		PreparedStatement中in子句的处理
 
测试环境: Oracle 10g
 
1.原理
 
1
select * from table(split('a,b,c'))
结果：
1
a
2
b
3
c
2.结论
对于类似：
 
1
select * from xxx_table where xxx_column in ('xxa', 'xxb', 'xxc')
可动态传入in子句参数
1
select * from xxx_table where xxx_column in (select * from table(split(?)))
1
PreparedStatement stmt = conn.prepareStatement(sql);
2
stmt.setObject(1, "xxa,xxb,xxc");
 
附split函数：
 
 
01
create or replace type split_tbl as table of varchar(32767);
02
/
03
 
04
create or replace function split
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(
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  p_list varchar2,
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  p_del varchar2 := ','
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) return split_tbl pipelined
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is
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  l_idx    pls_integer;
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  l_list    varchar2(32767) := p_list;
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  l_value    varchar2(32767);
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begin
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  loop
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    l_idx := instr(l_list,p_del);
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    if l_idx > 0 then
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      pipe row(substr(l_list,1,l_idx-1));
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      l_list := substr(l_list,l_idx+length(p_del));
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    else
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      pipe row(l_list);
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      exit;
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    end if;
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  end loop;
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  return;
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end split;
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/