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SAP 提供多种多线程的方法去优化程序的执行效率

1.分别执行多个job

2.Call function STARTING NEW TASK

3.直接使用SAP 提供的SPTA 框架函数：SPTA_PARA_PROCESS_START_2

本次，我们着重来介绍一下三种方法中函数的使用方法

获取空闲线程数：SPBT_INITIALIZE

*&---------------------------------------------------------------------*
*& Report  ZDEMO_TEST_PARALLEL
*&
*&---------------------------------------------------------------------*
*&
*&
*&---------------------------------------------------------------------*REPORT  zdemo_test_parallel.
TYPE-POOLS:spta.
DATA: gs_head  TYPE zsfi_doc_head.
DATA: gt_head  TYPE STANDARD TABLE OF zsfi_doc_head.
DATA: gt_out   TYPE STANDARD TABLE OF zsfi_doc_head_o.
DATA: gt_item  TYPE STANDARD TABLE OF zsfi_doc_item.
DATA: gs_item  TYPE zsfi_doc_item.
DATA: ls_head  TYPE zsfi_doc_head.
DATA: lt_head  TYPE STANDARD TABLE OF zsfi_doc_head.
DATA: lt_item  TYPE STANDARD TABLE OF zsfi_doc_item.
DATA: ls_item  TYPE zsfi_doc_item.
DATA: lv_int     TYPE numc4.
DATA: gs_parallel TYPE zsfi_doc_head_run.
DATA: gt_parallel TYPE ztfi_doc_head_run_t.
DATA: gt_result TYPE ztfi_doc_head_run_t.DATA: gv_start TYPE char10.
DATA: gv_end   TYPE char10.SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME  TITLE text-t01.
PARAMETERS: p_group TYPE spta_rfcgr OBLIGATORY MEMORY ID spta_rfcgr DEFAULT 'parallel_generators'.
PARAMETERS: p_task  LIKE sy-index DEFAULT '10'.
PARAMETERS: p_times TYPE numc4 OBLIGATORY DEFAULT '100'.
PARAMETERS: p_loop  TYPE char01 RADIOBUTTON GROUP rd1 DEFAULT 'X'.
PARAMETERS: p_para  TYPE char01 RADIOBUTTON GROUP rd1 .SELECTION-SCREEN END OF BLOCK b1.START-OF-SELECTION.lv_int = p_times.SELECT SINGLE *INTO CORRESPONDING FIELDS OF ls_headFROM ztfi_doc_headWHERE zsernr = 'BPM26020240606000003'.SELECT  *INTO CORRESPONDING FIELDS OF TABLE lt_itemFROM ztfi_doc_itemWHERE zsernr = 'BPM26020240606000003'.CASE 'X'.WHEN p_loop.PERFORM frm_loop_process.WHEN p_para.PERFORM frm_parallel_process.WHEN OTHERS.ENDCASE.*&---------------------------------------------------------------------*
*&      Form  FRM_LOOP_PROCESS
*&--