报告的现有DB2列不是表的列

Question

在DB2上运行的Moodle 2安装中,删除用户不成功,从数据库返回错误读取:

调试信息:[IBM] [CLI驱动程序] [DB2/LINUXX8664] SQL0206N"USERIDFROM"在使用它的上下文中无效.SQLSTATE = 42703 SQLCODE = -206 SELECT*FROM mdl_message WHERE useridfrom =？ORDER BY timecreated
[array(0 =>'28521',)]

SQL0206N的错误描述很清楚,但是useridfrom是一列mdl_message:

$ db2 describe table mdl_message

                          Data type                     Column
Column name               schema    Data type name      Length     Scale Nulls
------------------------- --------- ------------------- ---------- ----- ------
 ID                       SYSIBM    BIGINT                       8     0 No    
 USERIDFROM               SYSIBM    BIGINT                       8     0 No    
 USERIDTO                 SYSIBM    BIGINT                       8     0 No    
 SUBJECT                  SYSIBM    VARCHAR                    200     0 Yes   
 FULLMESSAGE              SYSIBM    VARCHAR                    200     0 Yes   
 FULLMESSAGEFORMAT        SYSIBM    SMALLINT                     2     0 Yes   
 FULLMESSAGEHTML          SYSIBM    VARCHAR                    100     0 Yes   
 SMALLMESSAGE             SYSIBM    VARCHAR                    200     0 Yes   
 NOTIFICATION             SYSIBM    SMALLINT                     2     0 Yes   
 CONTEXTURL               SYSIBM    VARCHAR                    200     0 Yes   
 CONTEXTURLNAME           SYSIBM    VARCHAR                    200     0 Yes   
 TIMECREATED              SYSIBM    BIGINT                       8     0 No    

  12 record(s) selected.

还有什么可能导致此错误？

Answer 1

列名可能以某种方式在其中获得了空格.您可以使用此查询来查明是否有任何尾随空格:

db2 "select '<' || name || '>' from sysibm.syscolumns where tbname = 'MDL_MESSAGE'"