IT27650: CLI INCORRECTLY CONVERTS AN EMPTY STRING TO 0 FOR WCHAR TO INTEGER CONVERSION

APAR status

• Closed as program error.

Error description

• When User passes an empty string argument to a Integer column
  with C type SQL_C_WCHAR and hence the conversion SQL_C_WCHAR ->
  SQL_INTEGER, CLI incorrectly passes a value Zero(0) to server
  which is incorrect.
  Correct behavior should be to error out alerting user to pass
  correct data.
  
  Example usecase:
  opt callerror on
  opt echo on
  
  
  sqlallocenv 1
  sqlallocconnect 1 1
  
  sqldriverconnectW 1 0
  "database=DBNAME;hostname=HOSTNAME;uid=newton;pwd=PASSWORD;proto
  col=tcpip;port=xxxx;" -3 255 SQL_DRIVER_NO_PROMPT
  
  sqlallocstmt 1 1
  sqlexecdirect 1 "drop table t2" -3
  sqlexecdirect 1 "create table t2(col1 int, col2 varchar(20))" -3
  sqlprepare 1 "insert into t2 values(?,?)" -3
  
  
  getmem 1 1 SQL_C_WCHAR 10
  getmem 1 2 SQL_C_CHAR 40
  
  
  updatemem 1 sql_c_wchar value 0 ""
  updatemem 2 sql_c_char value  5 "test2"
  
  sqlbindparameter 1 1 SQL_PARAM_INPUT SQL_C_WCHAR SQL_INTEGER 0 0
  1
  sqlbindparameter 1 2 SQL_PARAM_INPUT SQL_C_CHAR SQL_VARCHAR 19 0
  2
  
  sqlexecute 1
  
  sqlexecdirect 1 "select * from t2" -3
  fetchall 1
  
  Above sqlexecute would result in getting a value 0 inserted in
  t2.col1.
  Expected behavior is to return following error:
  CLI0112E  Error in assignment. SQLSTATE=22005
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * all                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 11.1.4.6 or higher                            *
  ****************************************************************
  

Problem conclusion

• Upgrade to Db2 11.1.4.6 or higher
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  DB2 CONNECT

• Fixed component ID

  DB2CONNCT

Applicable component levels

• RB10 PSN

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