ABAP Select data from SAP table REGREADEVBS into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REGREADEVBS 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 REGREADEVBS. 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 REGREADEVBS 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_REGREADEVBS TYPE STANDARD TABLE OF REGREADEVBS,
      WA_REGREADEVBS TYPE REGREADEVBS,
      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: <REGREADEVBS> TYPE REGREADEVBS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REGREADEVBS
*  INTO TABLE @DATA(IT_REGREADEVBS2).
*--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_REGREADEVBS INDEX 1 INTO DATA(WA_REGREADEVBS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REGREADEVBS>-MATNR = 1.
<REGREADEVBS>-GERAET = 1.
<REGREADEVBS>-ZWNUMMER = 1.
<REGREADEVBS>-SPARTE = 1.
<REGREADEVBS>-STORT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REGREADEVBS-STORTZUS, sy-vline,
  WA_REGREADEVBS-ANLAGE, sy-vline,
  WA_REGREADEVBS-PREV_MRRES, sy-vline,
  WA_REGREADEVBS-PREV_MRDATE, sy-vline,
  WA_REGREADEVBS-ZWART, sy-vline,
  WA_REGREADEVBS-ZWARTTXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REGREADEVBS 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_REGREADEVBS 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_REGREADEVBS INTO WA_REGREADEVBS.


*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_REGREADEVBS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGREADEVBS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REGREADEVBS-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGREADEVBS-GERAET.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field MASSBILL
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REGREADEVBS-MASSBILL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGREADEVBS-MASSBILL.
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_REGREADEVBS_STR, 
MATNR TYPE STRING,
GERAET TYPE STRING,
ZWNUMMER TYPE STRING,
SPARTE TYPE STRING,
STORT TYPE STRING,
STORTZUS TYPE STRING,
ANLAGE TYPE STRING,
PREV_MRRES TYPE STRING,
PREV_MRDATE TYPE STRING,
ZWART TYPE STRING,
ZWARTTXT TYPE STRING,
EQUNR TYPE STRING,
NO_MRORDER TYPE STRING,
CONT_ACCT TYPE STRING,
ACCT_NAME TYPE STRING,
VERTRAG TYPE STRING,
VBEZ TYPE STRING,
ADDRESS_FILTER TYPE STRING,
ADDRESS TYPE STRING,
SPARTTXT TYPE STRING,
MASSREAD TYPE STRING,
STANZVOR TYPE STRING,
STANZNAC TYPE STRING,
LAST_DATE TYPE STRING,
CONSMPT TYPE STRING,
MR_DIFF TYPE STRING,
MASSBILL TYPE STRING,
ABRFAKT TYPE STRING,
ZWFAKT TYPE STRING,
NO_CHECK TYPE STRING,
IMPLAUSIBLE TYPE STRING,
REGKENNZIFF TYPE STRING,
REGEXT_UI TYPE STRING,
MS_MULTI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REGREADEVBS_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_REGREADEVBS_STR-MATNR sy-vline 
WA_REGREADEVBS_STR-GERAET sy-vline 
WA_REGREADEVBS_STR-ZWNUMMER sy-vline 
WA_REGREADEVBS_STR-SPARTE sy-vline 
WA_REGREADEVBS_STR-STORT sy-vline 
WA_REGREADEVBS_STR-STORTZUS sy-vline 
WA_REGREADEVBS_STR-ANLAGE sy-vline 
WA_REGREADEVBS_STR-PREV_MRRES sy-vline 
WA_REGREADEVBS_STR-PREV_MRDATE sy-vline 
WA_REGREADEVBS_STR-ZWART sy-vline 
WA_REGREADEVBS_STR-ZWARTTXT sy-vline 
WA_REGREADEVBS_STR-EQUNR sy-vline 
WA_REGREADEVBS_STR-NO_MRORDER sy-vline 
WA_REGREADEVBS_STR-CONT_ACCT sy-vline 
WA_REGREADEVBS_STR-ACCT_NAME sy-vline 
WA_REGREADEVBS_STR-VERTRAG sy-vline 
WA_REGREADEVBS_STR-VBEZ sy-vline 
WA_REGREADEVBS_STR-ADDRESS_FILTER sy-vline 
WA_REGREADEVBS_STR-ADDRESS sy-vline 
WA_REGREADEVBS_STR-SPARTTXT sy-vline 
WA_REGREADEVBS_STR-MASSREAD sy-vline 
WA_REGREADEVBS_STR-STANZVOR sy-vline 
WA_REGREADEVBS_STR-STANZNAC sy-vline 
WA_REGREADEVBS_STR-LAST_DATE sy-vline 
WA_REGREADEVBS_STR-CONSMPT sy-vline 
WA_REGREADEVBS_STR-MR_DIFF sy-vline 
WA_REGREADEVBS_STR-MASSBILL sy-vline 
WA_REGREADEVBS_STR-ABRFAKT sy-vline 
WA_REGREADEVBS_STR-ZWFAKT sy-vline 
WA_REGREADEVBS_STR-NO_CHECK sy-vline 
WA_REGREADEVBS_STR-IMPLAUSIBLE sy-vline 
WA_REGREADEVBS_STR-REGKENNZIFF sy-vline 
WA_REGREADEVBS_STR-REGEXT_UI sy-vline 
WA_REGREADEVBS_STR-MS_MULTI sy-vline      INTO ld_text SEPARATED BY SPACE.

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