ABAP Select data from SAP table TOI0_REL_MM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TOI0_REL_MM 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 TOI0_REL_MM. 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 TOI0_REL_MM 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_TOI0_REL_MM TYPE STANDARD TABLE OF TOI0_REL_MM,
      WA_TOI0_REL_MM TYPE TOI0_REL_MM,
      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: <TOI0_REL_MM> TYPE TOI0_REL_MM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TOI0_REL_MM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TOI0_REL_MM
  INTO TABLE IT_TOI0_REL_MM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TOI0_REL_MM
*  INTO TABLE @DATA(IT_TOI0_REL_MM2).
*--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_TOI0_REL_MM INDEX 1 INTO DATA(WA_TOI0_REL_MM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TOI0_REL_MM ASSIGNING <TOI0_REL_MM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TOI0_REL_MM>-CLIENT = 1.
<TOI0_REL_MM>-APPLIC = 1.
<TOI0_REL_MM>-BSTYP = 1.
<TOI0_REL_MM>-BSART = 1.
<TOI0_REL_MM>-COUNTER = 1.

ENDLOOP.

LOOP AT IT_TOI0_REL_MM INTO WA_TOI0_REL_MM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TOI0_REL_MM-BUKRS, sy-vline,
  WA_TOI0_REL_MM-LIFNR, sy-vline,
  WA_TOI0_REL_MM-EKORG, sy-vline,
  WA_TOI0_REL_MM-EKGRP, sy-vline,
  WA_TOI0_REL_MM-KUNNR, sy-vline,
  WA_TOI0_REL_MM-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TOI0_REL_MM 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_TOI0_REL_MM 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_TOI0_REL_MM INTO WA_TOI0_REL_MM.


*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 APPLIC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TOI0_REL_MM-APPLIC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TOI0_REL_MM-APPLIC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TOI0_REL_MM-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TOI0_REL_MM-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TOI0_REL_MM-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TOI0_REL_MM-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_TOI0_REL_MM-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TOI0_REL_MM-MATNR.
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_TOI0_REL_MM_STR, 
CLIENT TYPE STRING,
APPLIC TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
COUNTER TYPE STRING,
BUKRS TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
KUNNR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
MATKL TYPE STRING,
BWTAR TYPE STRING,
BWTTY TYPE STRING,
MTART TYPE STRING,
BSTAE TYPE STRING,
OIC_MOT TYPE STRING,
BSAKZ TYPE STRING,
MBRSH TYPE STRING,
PSTYP TYPE STRING,
INCO1 TYPE STRING,
RESWK TYPE STRING,
RELEVANCE_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TOI0_REL_MM_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_TOI0_REL_MM_STR-CLIENT sy-vline 
WA_TOI0_REL_MM_STR-APPLIC sy-vline 
WA_TOI0_REL_MM_STR-BSTYP sy-vline 
WA_TOI0_REL_MM_STR-BSART sy-vline 
WA_TOI0_REL_MM_STR-COUNTER sy-vline 
WA_TOI0_REL_MM_STR-BUKRS sy-vline 
WA_TOI0_REL_MM_STR-LIFNR sy-vline 
WA_TOI0_REL_MM_STR-EKORG sy-vline 
WA_TOI0_REL_MM_STR-EKGRP sy-vline 
WA_TOI0_REL_MM_STR-KUNNR sy-vline 
WA_TOI0_REL_MM_STR-MATNR sy-vline 
WA_TOI0_REL_MM_STR-WERKS sy-vline 
WA_TOI0_REL_MM_STR-LGORT sy-vline 
WA_TOI0_REL_MM_STR-MATKL sy-vline 
WA_TOI0_REL_MM_STR-BWTAR sy-vline 
WA_TOI0_REL_MM_STR-BWTTY sy-vline 
WA_TOI0_REL_MM_STR-MTART sy-vline 
WA_TOI0_REL_MM_STR-BSTAE sy-vline 
WA_TOI0_REL_MM_STR-OIC_MOT sy-vline 
WA_TOI0_REL_MM_STR-BSAKZ sy-vline 
WA_TOI0_REL_MM_STR-MBRSH sy-vline 
WA_TOI0_REL_MM_STR-PSTYP sy-vline 
WA_TOI0_REL_MM_STR-INCO1 sy-vline 
WA_TOI0_REL_MM_STR-RESWK sy-vline 
WA_TOI0_REL_MM_STR-RELEVANCE_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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