ABAP Select data from SAP table BAPI_OIU_MPVL_1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPI_OIU_MPVL_1 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 BAPI_OIU_MPVL_1. 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 BAPI_OIU_MPVL_1 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_BAPI_OIU_MPVL_1 TYPE STANDARD TABLE OF BAPI_OIU_MPVL_1,
      WA_BAPI_OIU_MPVL_1 TYPE BAPI_OIU_MPVL_1,
      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: <BAPI_OIU_MPVL_1> TYPE BAPI_OIU_MPVL_1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BAPI_OIU_MPVL_1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BAPI_OIU_MPVL_1
  INTO TABLE IT_BAPI_OIU_MPVL_1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_OIU_MPVL_1
*  INTO TABLE @DATA(IT_BAPI_OIU_MPVL_12).
*--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_BAPI_OIU_MPVL_1 INDEX 1 INTO DATA(WA_BAPI_OIU_MPVL_12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BAPI_OIU_MPVL_1 ASSIGNING <BAPI_OIU_MPVL_1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_OIU_MPVL_1>-TRNSP_MTH_CD = 1.
<BAPI_OIU_MPVL_1>-CT_NO = 1.
<BAPI_OIU_MPVL_1>-TKT_NO = 1.
<BAPI_OIU_MPVL_1>-TKT_TIMESTAMP = 1.
<BAPI_OIU_MPVL_1>-PRD_DT = 1.

ENDLOOP.

LOOP AT IT_BAPI_OIU_MPVL_1 INTO WA_BAPI_OIU_MPVL_1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_OIU_MPVL_1-ENT_TIMESTAMP, sy-vline,
  WA_BAPI_OIU_MPVL_1-EFF_FROM_DT, sy-vline,
  WA_BAPI_OIU_MPVL_1-EFF_TO_DT, sy-vline,
  WA_BAPI_OIU_MPVL_1-METER_START, sy-vline,
  WA_BAPI_OIU_MPVL_1-METER_STOP, sy-vline,
  WA_BAPI_OIU_MPVL_1-CONV_GRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_OIU_MPVL_1 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_BAPI_OIU_MPVL_1 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_BAPI_OIU_MPVL_1 INTO WA_BAPI_OIU_MPVL_1.


*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 CT_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-CT_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-CT_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TKBTRY_MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-TKBTRY_MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-TKBTRY_MP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LD_OIL_DN_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-LD_OIL_DN_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-LD_OIL_DN_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LD_OIL_WL_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-LD_OIL_WL_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-LD_OIL_WL_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LD_OIL_WC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-LD_OIL_WC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-LD_OIL_WC_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LD_OIL_MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-LD_OIL_MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-LD_OIL_MP_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_BAPI_OIU_MPVL_1-STD_VOL_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-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_BAPI_OIU_MPVL_1-ENERGY_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-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_BAPI_OIU_MPVL_1-HEAT_VAL_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-HEAT_VAL_U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASE_DENSITY_U
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-BASE_DENSITY_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-BASE_DENSITY_U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ME_DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-ME_DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-ME_DOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field ME_DOCYR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-ME_DOCYR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-ME_DOCYR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORIG_MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_OIU_MPVL_1-ORIG_MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_OIU_MPVL_1-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_BAPI_OIU_MPVL_1_STR, 
TRNSP_MTH_CD TYPE STRING,
CT_NO TYPE STRING,
TKT_NO TYPE STRING,
TKT_TIMESTAMP TYPE STRING,
PRD_DT TYPE STRING,
ENT_TIMESTAMP TYPE STRING,
EFF_FROM_DT TYPE STRING,
EFF_TO_DT TYPE STRING,
METER_START TYPE STRING,
METER_STOP TYPE STRING,
CONV_GRP TYPE STRING,
TKBTRY_MP_NO TYPE STRING,
VS_CD TYPE STRING,
VL_CAT_CD TYPE STRING,
LD_OIL_DN_NO TYPE STRING,
LD_OIL_WL_NO TYPE STRING,
LD_OIL_WC_NO TYPE STRING,
LD_OIL_MP_NO TYPE STRING,
STD_VOL TYPE STRING,
STD_VOL_U TYPE STRING,
ENERGY TYPE STRING,
ENERGY_U TYPE STRING,
MOL_VOLUME TYPE STRING,
HEAT_VAL TYPE STRING,
HEAT_VAL_U TYPE STRING,
BASE_DENSITY TYPE STRING,
BASE_DENSITY_U TYPE STRING,
DENTYP TYPE STRING,
REC_TYPE_CD TYPE STRING,
EDI_STS_CD TYPE STRING,
ME_DOCNR TYPE STRING,
ME_DOCYR TYPE STRING,
ORIG_MP_NO TYPE STRING,
OIU_CRUSER TYPE STRING,
OIU_TIMESTAMP TYPE STRING,
LD_OIL_WO_RECOV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_OIU_MPVL_1_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_BAPI_OIU_MPVL_1_STR-TRNSP_MTH_CD sy-vline 
WA_BAPI_OIU_MPVL_1_STR-CT_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-TKT_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-TKT_TIMESTAMP sy-vline 
WA_BAPI_OIU_MPVL_1_STR-PRD_DT sy-vline 
WA_BAPI_OIU_MPVL_1_STR-ENT_TIMESTAMP sy-vline 
WA_BAPI_OIU_MPVL_1_STR-EFF_FROM_DT sy-vline 
WA_BAPI_OIU_MPVL_1_STR-EFF_TO_DT sy-vline 
WA_BAPI_OIU_MPVL_1_STR-METER_START sy-vline 
WA_BAPI_OIU_MPVL_1_STR-METER_STOP sy-vline 
WA_BAPI_OIU_MPVL_1_STR-CONV_GRP sy-vline 
WA_BAPI_OIU_MPVL_1_STR-TKBTRY_MP_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-VS_CD sy-vline 
WA_BAPI_OIU_MPVL_1_STR-VL_CAT_CD sy-vline 
WA_BAPI_OIU_MPVL_1_STR-LD_OIL_DN_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-LD_OIL_WL_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-LD_OIL_WC_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-LD_OIL_MP_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-STD_VOL sy-vline 
WA_BAPI_OIU_MPVL_1_STR-STD_VOL_U sy-vline 
WA_BAPI_OIU_MPVL_1_STR-ENERGY sy-vline 
WA_BAPI_OIU_MPVL_1_STR-ENERGY_U sy-vline 
WA_BAPI_OIU_MPVL_1_STR-MOL_VOLUME sy-vline 
WA_BAPI_OIU_MPVL_1_STR-HEAT_VAL sy-vline 
WA_BAPI_OIU_MPVL_1_STR-HEAT_VAL_U sy-vline 
WA_BAPI_OIU_MPVL_1_STR-BASE_DENSITY sy-vline 
WA_BAPI_OIU_MPVL_1_STR-BASE_DENSITY_U sy-vline 
WA_BAPI_OIU_MPVL_1_STR-DENTYP sy-vline 
WA_BAPI_OIU_MPVL_1_STR-REC_TYPE_CD sy-vline 
WA_BAPI_OIU_MPVL_1_STR-EDI_STS_CD sy-vline 
WA_BAPI_OIU_MPVL_1_STR-ME_DOCNR sy-vline 
WA_BAPI_OIU_MPVL_1_STR-ME_DOCYR sy-vline 
WA_BAPI_OIU_MPVL_1_STR-ORIG_MP_NO sy-vline 
WA_BAPI_OIU_MPVL_1_STR-OIU_CRUSER sy-vline 
WA_BAPI_OIU_MPVL_1_STR-OIU_TIMESTAMP sy-vline 
WA_BAPI_OIU_MPVL_1_STR-LD_OIL_WO_RECOV sy-vline      INTO ld_text SEPARATED BY SPACE.

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