ABAP Select data from SAP table FMRE01_CONS_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FMRE01_CONS_ALV 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 FMRE01_CONS_ALV. 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 FMRE01_CONS_ALV 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_FMRE01_CONS_ALV TYPE STANDARD TABLE OF FMRE01_CONS_ALV,
      WA_FMRE01_CONS_ALV TYPE FMRE01_CONS_ALV,
      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: <FMRE01_CONS_ALV> TYPE FMRE01_CONS_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FMRE01_CONS_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FMRE01_CONS_ALV
  INTO TABLE IT_FMRE01_CONS_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMRE01_CONS_ALV
*  INTO TABLE @DATA(IT_FMRE01_CONS_ALV2).
*--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_FMRE01_CONS_ALV INDEX 1 INTO DATA(WA_FMRE01_CONS_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FMRE01_CONS_ALV ASSIGNING <FMRE01_CONS_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMRE01_CONS_ALV>-BELNR = 1.
<FMRE01_CONS_ALV>-BLPOS = 1.
<FMRE01_CONS_ALV>-VRGTXT = 1.
<FMRE01_CONS_ALV>-DOCREF = 1.
<FMRE01_CONS_ALV>-WTABG = 1.

ENDLOOP.

LOOP AT IT_FMRE01_CONS_ALV INTO WA_FMRE01_CONS_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMRE01_CONS_ALV-WAERS, sy-vline,
  WA_FMRE01_CONS_ALV-HWABG, sy-vline,
  WA_FMRE01_CONS_ALV-HWAER, sy-vline,
  WA_FMRE01_CONS_ALV-WTNRE, sy-vline,
  WA_FMRE01_CONS_ALV-HWNRE, sy-vline,
  WA_FMRE01_CONS_ALV-AEDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMRE01_CONS_ALV 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_FMRE01_CONS_ALV 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_FMRE01_CONS_ALV INTO WA_FMRE01_CONS_ALV.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMRE01_CONS_ALV-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMRE01_CONS_ALV-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSU
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_FMRE01_CONS_ALV-KURSU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMRE01_CONS_ALV-KURSU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMRE01_CONS_ALV-RGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMRE01_CONS_ALV-RGJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RBELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMRE01_CONS_ALV-RBELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMRE01_CONS_ALV-RBELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMRE01_CONS_ALV-REBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMRE01_CONS_ALV-REBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMRE01_CONS_ALV-AWREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMRE01_CONS_ALV-AWREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AWSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FMRE01_CONS_ALV-AWSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMRE01_CONS_ALV-AWSYS.
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_FMRE01_CONS_ALV_STR, 
BELNR TYPE STRING,
BLPOS TYPE STRING,
VRGTXT TYPE STRING,
DOCREF TYPE STRING,
WTABG TYPE STRING,
WAERS TYPE STRING,
HWABG TYPE STRING,
HWAER TYPE STRING,
WTNRE TYPE STRING,
HWNRE TYPE STRING,
AEDAT TYPE STRING,
BLDAT TYPE STRING,
ATEXT TYPE STRING,
KURSU TYPE STRING,
STATE TYPE STRING,
STATS TYPE STRING,
STOKZ TYPE STRING,
RBUKRS TYPE STRING,
RGJAHR TYPE STRING,
RBELNR TYPE STRING,
RBUZEI TYPE STRING,
REBELN TYPE STRING,
REBELP TYPE STRING,
RZEKKN TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWSYS TYPE STRING,
AWPOS TYPE STRING,
VRGNG TYPE STRING,
COLOR TYPE STRING,
BPENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMRE01_CONS_ALV_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_FMRE01_CONS_ALV_STR-BELNR sy-vline 
WA_FMRE01_CONS_ALV_STR-BLPOS sy-vline 
WA_FMRE01_CONS_ALV_STR-VRGTXT sy-vline 
WA_FMRE01_CONS_ALV_STR-DOCREF sy-vline 
WA_FMRE01_CONS_ALV_STR-WTABG sy-vline 
WA_FMRE01_CONS_ALV_STR-WAERS sy-vline 
WA_FMRE01_CONS_ALV_STR-HWABG sy-vline 
WA_FMRE01_CONS_ALV_STR-HWAER sy-vline 
WA_FMRE01_CONS_ALV_STR-WTNRE sy-vline 
WA_FMRE01_CONS_ALV_STR-HWNRE sy-vline 
WA_FMRE01_CONS_ALV_STR-AEDAT sy-vline 
WA_FMRE01_CONS_ALV_STR-BLDAT sy-vline 
WA_FMRE01_CONS_ALV_STR-ATEXT sy-vline 
WA_FMRE01_CONS_ALV_STR-KURSU sy-vline 
WA_FMRE01_CONS_ALV_STR-STATE sy-vline 
WA_FMRE01_CONS_ALV_STR-STATS sy-vline 
WA_FMRE01_CONS_ALV_STR-STOKZ sy-vline 
WA_FMRE01_CONS_ALV_STR-RBUKRS sy-vline 
WA_FMRE01_CONS_ALV_STR-RGJAHR sy-vline 
WA_FMRE01_CONS_ALV_STR-RBELNR sy-vline 
WA_FMRE01_CONS_ALV_STR-RBUZEI sy-vline 
WA_FMRE01_CONS_ALV_STR-REBELN sy-vline 
WA_FMRE01_CONS_ALV_STR-REBELP sy-vline 
WA_FMRE01_CONS_ALV_STR-RZEKKN sy-vline 
WA_FMRE01_CONS_ALV_STR-AWTYP sy-vline 
WA_FMRE01_CONS_ALV_STR-AWREF sy-vline 
WA_FMRE01_CONS_ALV_STR-AWORG sy-vline 
WA_FMRE01_CONS_ALV_STR-AWSYS sy-vline 
WA_FMRE01_CONS_ALV_STR-AWPOS sy-vline 
WA_FMRE01_CONS_ALV_STR-VRGNG sy-vline 
WA_FMRE01_CONS_ALV_STR-COLOR sy-vline 
WA_FMRE01_CONS_ALV_STR-BPENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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