Question

我正在尝试使用“ SQL SELECT JSON_VAL FROM Json_Table”的示例从远程Web服务获取数据。我不断收到相同错误的变化...

嵌入式语句中缺少位置17 INTO子句。

有人可以引导我吗？ IBM i（as / 400）DB / 2 OS / V7R3M0

谢谢！

// JSON_TABLE : used to extract values from that JSON object into relational data.   
// '$' :  used as the outermost SQL/JSON path expression,                            
//        the column definitions will use the existing JSON object                   
//        as their context item. Because '$' only references one item in the         
//        object, this use of JSON_TABLE will only produce one row.                  
//        After the outermost SQL/JSON path expression, the columns are defined.     


     D myString     s           5500a    

      Exec SQL SELECT JSON_VAL FROM Json_Table(                            
      Systools.HttpPostClob(                                               
        'http://10.10.10.10:8099/dir/dir/pgm',              
        '<httpHeader>' +                                                   
        '<header name="Content-Type" value="application/json"/>' +         
        '</httpHeader>',  :myString       
        // '</httpHeader>' INTO :myString    << NO   
        // '</httpHeader>') INTO :myString    << NO
       ), '$' COLUMNS(JSON_VAL VARCHAR(1000) PATH '$.json')) as x ;        


       ParmOut = myString;

Answer 1

SELECT INTO语法如下：

exec sql
  select ...
    into ...
    from ...

所以尝试一下：

exec sql
  select json_val
    into :mystring
    from json_table(
      systools.HttpPostClob(
        'http://10.10.10.10:8099/dir/dir/pgm',              
        '<httpHeader>' +                                                   
        '<header name="Content-Type" value="application/json"/>' +         
        '</httpHeader>'
      ), '$' COLUMNS(JSON_VAL VARCHAR(1000) PATH '$.json')) as x ;

问题是，我在DB2 for i v7.3文档中找不到HttpPostClob（）。如果没有滚动自己的存储过程，可能无法在该平台上使用。

IBM DB / 2 i-从Json_Table进行SQL SELECT JSON_VAL”

1 个答案: