ABAP Select data from SAP table IERVSDBILLGDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IERVSDBILLGDOC
*  INTO TABLE @DATA(IT_IERVSDBILLGDOC2).
*--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_IERVSDBILLGDOC INDEX 1 INTO DATA(WA_IERVSDBILLGDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IERVSDBILLGDOC>-MANDT = 1.
<IERVSDBILLGDOC>-UTILITIESBILLINGDOCUMENT = 1.
<IERVSDBILLGDOC>-COMPANYCODE = 1.
<IERVSDBILLGDOC>-BUSINESSPARTNER = 1.
<IERVSDBILLGDOC>-CONTRACTACCOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IERVSDBILLGDOC-UTILITIESCONTRACT, sy-vline,
  WA_IERVSDBILLGDOC-UTILSBUSTRANSACTIONTYPE, sy-vline,
  WA_IERVSDBILLGDOC-UTILITIESBILLINGREASON, sy-vline,
  WA_IERVSDBILLGDOC-UTILSBILLGPERIODSTARTDATE, sy-vline,
  WA_IERVSDBILLGDOC-UTILSBILLGPERIODENDDATE, sy-vline,
  WA_IERVSDBILLGDOC-DIVISION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IERVSDBILLGDOC 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_IERVSDBILLGDOC 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_IERVSDBILLGDOC INTO WA_IERVSDBILLGDOC.


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

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

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

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

*Conversion exit ALPHA, internal->external for field UTILITIESBILLINGRUN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IERVSDBILLGDOC-UTILITIESBILLINGRUN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IERVSDBILLGDOC-UTILITIESBILLINGRUN.
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_IERVSDBILLGDOC_STR, 
MANDT TYPE STRING,
UTILITIESBILLINGDOCUMENT TYPE STRING,
COMPANYCODE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CONTRACTACCOUNT TYPE STRING,
UTILITIESCONTRACT TYPE STRING,
UTILSBUSTRANSACTIONTYPE TYPE STRING,
UTILITIESBILLINGREASON TYPE STRING,
UTILSBILLGPERIODSTARTDATE TYPE STRING,
UTILSBILLGPERIODENDDATE TYPE STRING,
DIVISION TYPE STRING,
UTILSBILLGSIMULATIONREASON TYPE STRING,
UTILSBILLGDOCISNOTRELEASED TYPE STRING,
UTILSBILLGDOCREVERSALDATE TYPE STRING,
UTILSBILLGDOCREVERSALRSN TYPE STRING,
UTILSBILLGPERIODALLOCATIONDATE TYPE STRING,
UTILITIESPORTION TYPE STRING,
SCHEDULEDUTILITIESBILLINGDATE TYPE STRING,
METERREADINGUNIT TYPE STRING,
SCHEDULEDMETERREADINGDATE TYPE STRING,
MANUALUTILSBILLGDOCCRTNRSN TYPE STRING,
MNLUTILSBILLGDOCISRELDFORINVCG TYPE STRING,
UTILITIESBILLINGRUN TYPE STRING,
UTILSBILLGDOCCREATIONDATE TYPE STRING,
UTILSBILLGDOCCREATEDBYUSER TYPE STRING,
UTILSBILLGDOCLASTCHANGEDATE TYPE STRING,
UTILSBILLGDOCLASTCHANGEDBYUSER TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
NMBROFREVERSEDUTILSBILLGDOCS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IERVSDBILLGDOC_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_IERVSDBILLGDOC_STR-MANDT sy-vline 
WA_IERVSDBILLGDOC_STR-UTILITIESBILLINGDOCUMENT sy-vline 
WA_IERVSDBILLGDOC_STR-COMPANYCODE sy-vline 
WA_IERVSDBILLGDOC_STR-BUSINESSPARTNER sy-vline 
WA_IERVSDBILLGDOC_STR-CONTRACTACCOUNT sy-vline 
WA_IERVSDBILLGDOC_STR-UTILITIESCONTRACT sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBUSTRANSACTIONTYPE sy-vline 
WA_IERVSDBILLGDOC_STR-UTILITIESBILLINGREASON sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGPERIODSTARTDATE sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGPERIODENDDATE sy-vline 
WA_IERVSDBILLGDOC_STR-DIVISION sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGSIMULATIONREASON sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGDOCISNOTRELEASED sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGDOCREVERSALDATE sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGDOCREVERSALRSN sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGPERIODALLOCATIONDATE sy-vline 
WA_IERVSDBILLGDOC_STR-UTILITIESPORTION sy-vline 
WA_IERVSDBILLGDOC_STR-SCHEDULEDUTILITIESBILLINGDATE sy-vline 
WA_IERVSDBILLGDOC_STR-METERREADINGUNIT sy-vline 
WA_IERVSDBILLGDOC_STR-SCHEDULEDMETERREADINGDATE sy-vline 
WA_IERVSDBILLGDOC_STR-MANUALUTILSBILLGDOCCRTNRSN sy-vline 
WA_IERVSDBILLGDOC_STR-MNLUTILSBILLGDOCISRELDFORINVCG sy-vline 
WA_IERVSDBILLGDOC_STR-UTILITIESBILLINGRUN sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGDOCCREATIONDATE sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGDOCCREATEDBYUSER sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGDOCLASTCHANGEDATE sy-vline 
WA_IERVSDBILLGDOC_STR-UTILSBILLGDOCLASTCHANGEDBYUSER sy-vline 
WA_IERVSDBILLGDOC_STR-AUTHORIZATIONGROUP sy-vline 
WA_IERVSDBILLGDOC_STR-NMBROFREVERSEDUTILSBILLGDOCS sy-vline      INTO ld_text SEPARATED BY SPACE.

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