ABAP Select data from SAP table OIU_PR_MPVOL into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIU_PR_MPVOL table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to OIU_PR_MPVOL. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the OIU_PR_MPVOL table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_OIU_PR_MPVOL TYPE STANDARD TABLE OF OIU_PR_MPVOL,
      WA_OIU_PR_MPVOL TYPE OIU_PR_MPVOL,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <OIU_PR_MPVOL> TYPE OIU_PR_MPVOL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIU_PR_MPVOL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIU_PR_MPVOL
  INTO TABLE IT_OIU_PR_MPVOL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIU_PR_MPVOL
*  INTO TABLE @DATA(IT_OIU_PR_MPVOL2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_OIU_PR_MPVOL INDEX 1 INTO DATA(WA_OIU_PR_MPVOL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIU_PR_MPVOL ASSIGNING <OIU_PR_MPVOL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIU_PR_MPVOL>-MP_NO = 1.
<OIU_PR_MPVOL>-VT_CD = 1.
<OIU_PR_MPVOL>-VC_CD = 1.
<OIU_PR_MPVOL>-MATNR = 1.
<OIU_PR_MPVOL>-FREQ_CD = 1.

ENDLOOP.

LOOP AT IT_OIU_PR_MPVOL INTO WA_OIU_PR_MPVOL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIU_PR_MPVOL-DN_NO, sy-vline,
  WA_OIU_PR_MPVOL-PRD_DT, sy-vline,
  WA_OIU_PR_MPVOL-VS_CD, sy-vline,
  WA_OIU_PR_MPVOL-VL_CAT_CD, sy-vline,
  WA_OIU_PR_MPVOL-STD_VOL, sy-vline,
  WA_OIU_PR_MPVOL-STD_VOL_U, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIU_PR_MPVOL you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_OIU_PR_MPVOL TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_OIU_PR_MPVOL INTO WA_OIU_PR_MPVOL.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_PR_MPVOL-MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_PR_MPVOL-MP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIU_PR_MPVOL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_PR_MPVOL-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DN_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_PR_MPVOL-DN_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_PR_MPVOL-DN_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field STD_VOL_U
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIU_PR_MPVOL-STD_VOL_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_PR_MPVOL-STD_VOL_U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ENERGY_U
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIU_PR_MPVOL-ENERGY_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_PR_MPVOL-ENERGY_U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field HEAT_VAL_U
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIU_PR_MPVOL-HEAT_VAL_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_PR_MPVOL-HEAT_VAL_U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORIG_MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_PR_MPVOL-ORIG_MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_PR_MPVOL-ORIG_MP_NO.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_OIU_PR_MPVOL_STR, 
MP_NO TYPE STRING,
VT_CD TYPE STRING,
VC_CD TYPE STRING,
MATNR TYPE STRING,
FREQ_CD TYPE STRING,
DN_NO TYPE STRING,
PRD_DT TYPE STRING,
VS_CD TYPE STRING,
VL_CAT_CD TYPE STRING,
STD_VOL TYPE STRING,
STD_VOL_U TYPE STRING,
ENERGY TYPE STRING,
ENERGY_U TYPE STRING,
HEAT_VAL TYPE STRING,
HEAT_VAL_U TYPE STRING,
ORIG_MP_NO TYPE STRING,
ENT_TIMESTAMP TYPE STRING,
OIU_TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIU_PR_MPVOL_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_OIU_PR_MPVOL_STR-MP_NO sy-vline 
WA_OIU_PR_MPVOL_STR-VT_CD sy-vline 
WA_OIU_PR_MPVOL_STR-VC_CD sy-vline 
WA_OIU_PR_MPVOL_STR-MATNR sy-vline 
WA_OIU_PR_MPVOL_STR-FREQ_CD sy-vline 
WA_OIU_PR_MPVOL_STR-DN_NO sy-vline 
WA_OIU_PR_MPVOL_STR-PRD_DT sy-vline 
WA_OIU_PR_MPVOL_STR-VS_CD sy-vline 
WA_OIU_PR_MPVOL_STR-VL_CAT_CD sy-vline 
WA_OIU_PR_MPVOL_STR-STD_VOL sy-vline 
WA_OIU_PR_MPVOL_STR-STD_VOL_U sy-vline 
WA_OIU_PR_MPVOL_STR-ENERGY sy-vline 
WA_OIU_PR_MPVOL_STR-ENERGY_U sy-vline 
WA_OIU_PR_MPVOL_STR-HEAT_VAL sy-vline 
WA_OIU_PR_MPVOL_STR-HEAT_VAL_U sy-vline 
WA_OIU_PR_MPVOL_STR-ORIG_MP_NO sy-vline 
WA_OIU_PR_MPVOL_STR-ENT_TIMESTAMP sy-vline 
WA_OIU_PR_MPVOL_STR-OIU_TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.