Ora8SetNull Function

Action

Assigns a NULL value to the program variable that is bound to the specified place holder in the SQL statement or PL/SQL block. The place holder is identified by the name or the number specified in the SQL statement or PL/SQL block. This function is used to assign values to both scalar and array program variables.

Include file

Ora8.bdh

Syntax

Ora8SetNull( in hStmt   : number,
             in sSqlVar : string,
             in nIndex  : number optional): boolean;

Return value

true if successful
false otherwise. In this case, you can use the Ora8OciError function to retrieve the Oracle OCI error code

Parameter	Description
hStmt	Statement handle.
sSqlVar	Name of the place holder in the SQL statement or PL/SQL block. This parameter must include the preceding colon identifying it as a place holder.
nIndex	Array index (optional). For array binding operations, this parameter specifies the array index of the program variable.

Example

var
  ghEnv0        : number;
  ghError0      : number;
  ghStmt0       : number;
  ghSvcCtx0     : number;

dcltrans
  transaction TMain
  begin
    Ora8Init(ghEnv0, OCI_DEFAULT);
    Ora8HandleAlloc(ghEnv0, ghError0, OCI_HTYPE_ERROR);
    Ora8Logon(ghEnv0, ghSvcCtx0, "user", "password", "orclnet2");
        Ora8HandleAlloc(ghEnv0, ghStmt0, OCI_HTYPE_STMT);
        Ora8StmtPrepare(ghStmt0, sqlInsert, OCI_NTV_SYNTAX);
     Ora8Bind(ghStmt0, ":name", SQLT_CHR, 32);
    Ora8Bind(ghStmt0, ":key", SQLT_BIN, 64);
        Ora8SetString(ghStmt0, ":name", "Michael");
    Ora8SetNull(ghStmt0, ":age");
        Ora8StmtExecute(ghSvcCtx0, ghStmt0);

    Ora8HandleFree(ghStmt0, OCI_HTYPE_STMT);
    Ora8Logoff(ghSvcCtx0);
    Ora8HandleFree(ghError0, OCI_HTYPE_ERROR);
    Ora8HandleFree(ghEnv0, OCI_HTYPE_ENV);
  end TMain;

dclsql
  sqlInsert:
    INSERT INTO persons (name, age) VALUES (:name, :age);