Question

我是pl / sql和xml的新手。我想通过调用用户定义函数来从表中获取数据作为xml格式：

这是表sql：

CREATE TABLE "HIMADRI"."PAYROLLFILE" 
   (    "SALYR" NUMBER(4,0) NOT NULL ENABLE, 
    "SALMT" NUMBER(2,0) NOT NULL ENABLE, 
    "EMPID" NUMBER NOT NULL ENABLE, 
    "DPTID" NUMBER NOT NULL ENABLE, 
    "SALHD" VARCHAR2(2 BYTE) NOT NULL ENABLE, 
    "DESCR" VARCHAR2(50 BYTE) NOT NULL ENABLE, 
    "ALAMT" FLOAT(126) NOT NULL ENABLE, 
    "OPID" NUMBER NOT NULL ENABLE, 
    "TRADT" DATE);

我希望以xml格式获取数据：

  <transaction>
            <salary_year>SALYR</salary_year>
            <salary_month>SALMT</salary_month>
            <employee_id>EMPID</employee_id>
            <department_code>DPTID</department_code>
            <salary_head>SALHD</salary_head>
            <description>DESCR</description>
            <amount>ALAMT</amount>
            <operator_id>OPID</operator_id>
            <transaction_date>TRADT</transaction_date>
</transaction>

我应该如何编写pl / sql函数体：

FUNCTION get_all_payroll_transactions RETURN  VARCHAR2 IS  isSuccess VARCHAR2(50);

   BEGIN 
     SELECT XMLElement( "transaction",  
                    XMLElement("salary_year", SALYR),
                    XMLElement("salary_month", SALMT),
                    XMLElement("employee_id", EMPID),
                    XMLElement("department_code", DPTID),
                    XMLElement("salary_head", SALHD),
                    XMLElement("description", DESCR),
                    XMLElement("amount", ALAMT),
                    XMLElement("operator_id", OPID),
                    XMLElement("transaction_date", TRADT)

                 )AS transaction1
    FROM PAYROLLFILE ;
   END get_all_payroll_transactions;

我该如何从php调用该函数：

$stid = oci_parse($conn, " begin   
                               :result :=  PAYROLL.get_all_payroll_transactions();                      

                                end;" );    

    oci_bind_by_name($stid, ':result',$ru, 500);    
    oci_execute($stid);

请给我线索。谢谢

Answer 1

您不确定来自PHP的调用，但是当您在plsql块中执行select时，您需要将其选择为变量，因此在这种情况下，它看起来如下所示。您还需要显式返回该变量。另外，当您选择XML时，您需要比VARCHAR2（50）更大的变量。以下是未经测试的，但会让您了解前进的方向。

FUNCTION get_all_payroll_transactions RETURN  VARCHAR2 IS
  isSuccess VARCHAR2(4000);

   BEGIN 
     SELECT XMLElement( "transaction",  
                    XMLElement("salary_year", SALYR),
                    XMLElement("salary_month", SALMT),
                    XMLElement("employee_id", EMPID),
                    XMLElement("department_code", DPTID),
                    XMLElement("salary_head", SALHD),
                    XMLElement("description", DESCR),
                    XMLElement("amount", ALAMT),
                    XMLElement("operator_id", OPID),
                    XMLElement("transaction_date", TRADT)

                 )AS transaction1
    into isSuccess
    FROM PAYROLLFILE ;

  Return isSuccess;
   END get_all_payroll_transactions;

如何修复错误INTO子句在此SELECT语句中是预期的

1 个答案: