ABAP Select data from SAP table RJP_MG0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RJP_MG0 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 RJP_MG0. 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 RJP_MG0 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_RJP_MG0 TYPE STANDARD TABLE OF RJP_MG0,
      WA_RJP_MG0 TYPE RJP_MG0,
      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: <RJP_MG0> TYPE RJP_MG0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RJP_MG0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RJP_MG0
  INTO TABLE IT_RJP_MG0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJP_MG0
*  INTO TABLE @DATA(IT_RJP_MG02).
*--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_RJP_MG0 INDEX 1 INTO DATA(WA_RJP_MG02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RJP_MG0 ASSIGNING <RJP_MG0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJP_MG0>-MATNR = 1.
<RJP_MG0>-GENZRVON = 1.
<RJP_MG0>-GENZRBIS = 1.
<RJP_MG0>-ABDATUM_PLAN = 1.
<RJP_MG0>-BISDATUM_PLAN = 1.

ENDLOOP.

LOOP AT IT_RJP_MG0 INTO WA_RJP_MG0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJP_MG0-ISMPERRULE, sy-vline,
  WA_RJP_MG0-ISMFKALID, sy-vline,
  WA_RJP_MG0-NOT_ACTIVE_COUNT, sy-vline,
  WA_RJP_MG0-BATCH_STARTDATE, sy-vline,
  WA_RJP_MG0-BATCH_STARTTIME, sy-vline,
  WA_RJP_MG0-BATCH_STARTIMMEDIATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJP_MG0 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_RJP_MG0 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_RJP_MG0 INTO WA_RJP_MG0.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MG0-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MG0-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ISMPERRULE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MG0-ISMPERRULE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MG0-ISMPERRULE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VONMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MG0-VONMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MG0-VONMATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field BISMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MG0-BISMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MG0-BISMATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MEDPROD_PATTERN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MG0-MEDPROD_PATTERN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MG0-MEDPROD_PATTERN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MIGRATE_PATTERN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MG0-MIGRATE_PATTERN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MG0-MIGRATE_PATTERN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field CAL_PATTERN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RJP_MG0-CAL_PATTERN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJP_MG0-CAL_PATTERN.
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_RJP_MG0_STR, 
MATNR TYPE STRING,
GENZRVON TYPE STRING,
GENZRBIS TYPE STRING,
ABDATUM_PLAN TYPE STRING,
BISDATUM_PLAN TYPE STRING,
ISMPERRULE TYPE STRING,
ISMFKALID TYPE STRING,
NOT_ACTIVE_COUNT TYPE STRING,
BATCH_STARTDATE TYPE STRING,
BATCH_STARTTIME TYPE STRING,
BATCH_STARTIMMEDIATE TYPE STRING,
BATCH_STARTLATER TYPE STRING,
XMPGEN_TESTLAUF TYPE STRING,
VONHEFT TYPE STRING,
BISHEFT TYPE STRING,
MSDDISPOHORIZONT TYPE STRING,
SEL_VARIANTE TYPE STRING,
VONMATNR TYPE STRING,
BISMATNR TYPE STRING,
MEDPROD_PATTERN TYPE STRING,
TOP_LINE_1000 TYPE STRING,
LINES_1000 TYPE STRING,
XMATNR_DEFAULT TYPE STRING,
XCOPYNR_DEFAULT TYPE STRING,
MIGRATE_PATTERN TYPE STRING,
MIGRATE_ISSTYPAC TYPE STRING,
CAL_ISSTYPAC TYPE STRING,
CAL_PATTERN TYPE STRING,
BATCH_NOT_START TYPE STRING,
COUNT_NEXT_ISSUES TYPE STRING,
XINTERVALL TYPE STRING,
XCOUNT_NEXT_ISSUES TYPE STRING,
COUNT_SHIFT_ISSUES TYPE STRING,
XCHRON_PROCESSES TYPE STRING,
MEDPROD_MAKTX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJP_MG0_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_RJP_MG0_STR-MATNR sy-vline 
WA_RJP_MG0_STR-GENZRVON sy-vline 
WA_RJP_MG0_STR-GENZRBIS sy-vline 
WA_RJP_MG0_STR-ABDATUM_PLAN sy-vline 
WA_RJP_MG0_STR-BISDATUM_PLAN sy-vline 
WA_RJP_MG0_STR-ISMPERRULE sy-vline 
WA_RJP_MG0_STR-ISMFKALID sy-vline 
WA_RJP_MG0_STR-NOT_ACTIVE_COUNT sy-vline 
WA_RJP_MG0_STR-BATCH_STARTDATE sy-vline 
WA_RJP_MG0_STR-BATCH_STARTTIME sy-vline 
WA_RJP_MG0_STR-BATCH_STARTIMMEDIATE sy-vline 
WA_RJP_MG0_STR-BATCH_STARTLATER sy-vline 
WA_RJP_MG0_STR-XMPGEN_TESTLAUF sy-vline 
WA_RJP_MG0_STR-VONHEFT sy-vline 
WA_RJP_MG0_STR-BISHEFT sy-vline 
WA_RJP_MG0_STR-MSDDISPOHORIZONT sy-vline 
WA_RJP_MG0_STR-SEL_VARIANTE sy-vline 
WA_RJP_MG0_STR-VONMATNR sy-vline 
WA_RJP_MG0_STR-BISMATNR sy-vline 
WA_RJP_MG0_STR-MEDPROD_PATTERN sy-vline 
WA_RJP_MG0_STR-TOP_LINE_1000 sy-vline 
WA_RJP_MG0_STR-LINES_1000 sy-vline 
WA_RJP_MG0_STR-XMATNR_DEFAULT sy-vline 
WA_RJP_MG0_STR-XCOPYNR_DEFAULT sy-vline 
WA_RJP_MG0_STR-MIGRATE_PATTERN sy-vline 
WA_RJP_MG0_STR-MIGRATE_ISSTYPAC sy-vline 
WA_RJP_MG0_STR-CAL_ISSTYPAC sy-vline 
WA_RJP_MG0_STR-CAL_PATTERN sy-vline 
WA_RJP_MG0_STR-BATCH_NOT_START sy-vline 
WA_RJP_MG0_STR-COUNT_NEXT_ISSUES sy-vline 
WA_RJP_MG0_STR-XINTERVALL sy-vline 
WA_RJP_MG0_STR-XCOUNT_NEXT_ISSUES sy-vline 
WA_RJP_MG0_STR-COUNT_SHIFT_ISSUES sy-vline 
WA_RJP_MG0_STR-XCHRON_PROCESSES sy-vline 
WA_RJP_MG0_STR-MEDPROD_MAKTX sy-vline      INTO ld_text SEPARATED BY SPACE.

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