ABAP Select data from SAP table REVMGT_INVOICE_LEVEL1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REVMGT_INVOICE_LEVEL1 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 REVMGT_INVOICE_LEVEL1. 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 REVMGT_INVOICE_LEVEL1 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_REVMGT_INVOICE_LEVEL1 TYPE STANDARD TABLE OF REVMGT_INVOICE_LEVEL1,
      WA_REVMGT_INVOICE_LEVEL1 TYPE REVMGT_INVOICE_LEVEL1,
      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: <REVMGT_INVOICE_LEVEL1> TYPE REVMGT_INVOICE_LEVEL1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REVMGT_INVOICE_LEVEL1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REVMGT_INVOICE_LEVEL1
  INTO TABLE IT_REVMGT_INVOICE_LEVEL1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REVMGT_INVOICE_LEVEL1
*  INTO TABLE @DATA(IT_REVMGT_INVOICE_LEVEL12).
*--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_REVMGT_INVOICE_LEVEL1 INDEX 1 INTO DATA(WA_REVMGT_INVOICE_LEVEL12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REVMGT_INVOICE_LEVEL1 ASSIGNING <REVMGT_INVOICE_LEVEL1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REVMGT_INVOICE_LEVEL1>-DRUCKDAT = 1.
<REVMGT_INVOICE_LEVEL1>-STOKZ = 1.
<REVMGT_INVOICE_LEVEL1>-INTOPBEL = 1.
<REVMGT_INVOICE_LEVEL1>-ERDZ_V = 1.
<REVMGT_INVOICE_LEVEL1>-ERDR_V = 1.

ENDLOOP.

LOOP AT IT_REVMGT_INVOICE_LEVEL1 INTO WA_REVMGT_INVOICE_LEVEL1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REVMGT_INVOICE_LEVEL1-ERDO_V, sy-vline,
  WA_REVMGT_INVOICE_LEVEL1-ERDB_V, sy-vline,
  WA_REVMGT_INVOICE_LEVEL1-ERDU_V, sy-vline,
  WA_REVMGT_INVOICE_LEVEL1-TOTAL_AMNT, sy-vline,
  WA_REVMGT_INVOICE_LEVEL1-TOTAL_WAER, sy-vline,
  WA_REVMGT_INVOICE_LEVEL1-TOTAL_AMNT_USE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REVMGT_INVOICE_LEVEL1 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_REVMGT_INVOICE_LEVEL1 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_REVMGT_INVOICE_LEVEL1 INTO WA_REVMGT_INVOICE_LEVEL1.


*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 INTOPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVMGT_INVOICE_LEVEL1-INTOPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVMGT_INVOICE_LEVEL1-INTOPBEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NRZAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVMGT_INVOICE_LEVEL1-NRZAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVMGT_INVOICE_LEVEL1-NRZAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWVK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVMGT_INVOICE_LEVEL1-ABWVK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVMGT_INVOICE_LEVEL1-ABWVK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_REVMGT_INVOICE_LEVEL1-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVMGT_INVOICE_LEVEL1-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STO_OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVMGT_INVOICE_LEVEL1-STO_OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVMGT_INVOICE_LEVEL1-STO_OPBEL.
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_REVMGT_INVOICE_LEVEL1_STR, 
DRUCKDAT TYPE STRING,
STOKZ TYPE STRING,
INTOPBEL TYPE STRING,
ERDZ_V TYPE STRING,
ERDR_V TYPE STRING,
ERDO_V TYPE STRING,
ERDB_V TYPE STRING,
ERDU_V TYPE STRING,
TOTAL_AMNT TYPE STRING,
TOTAL_WAER TYPE STRING,
TOTAL_AMNT_USE TYPE STRING,
ZLSCH TYPE STRING,
NRZAS TYPE STRING,
PORTION TYPE STRING,
ABRVORG TYPE STRING,
FORMKEY TYPE STRING,
TOBRELEASD TYPE STRING,
SIMULATED TYPE STRING,
INVOICED TYPE STRING,
ABWVK TYPE STRING,
ERGRD TYPE STRING,
LANGU TYPE STRING,
ERDAT TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LOEVM TYPE STRING,
VERART TYPE STRING,
STO_BUDAT TYPE STRING,
STO_OPBEL TYPE STRING,
MAZAE TYPE STRING,
PAY_STATUS TYPE STRING,
INVOBETW TYPE STRING,
TOT_AMNT_EURO TYPE STRING,
INVOBETW_EURO TYPE STRING,
WAER_EURO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REVMGT_INVOICE_LEVEL1_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_REVMGT_INVOICE_LEVEL1_STR-DRUCKDAT sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-STOKZ sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-INTOPBEL sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ERDZ_V sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ERDR_V sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ERDO_V sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ERDB_V sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ERDU_V sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-TOTAL_AMNT sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-TOTAL_WAER sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-TOTAL_AMNT_USE sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ZLSCH sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-NRZAS sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-PORTION sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ABRVORG sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-FORMKEY sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-TOBRELEASD sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-SIMULATED sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-INVOICED sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ABWVK sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ERGRD sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-LANGU sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-ERDAT sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-AEDAT sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-AENAM sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-BEGRU sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-LOEVM sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-VERART sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-STO_BUDAT sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-STO_OPBEL sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-MAZAE sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-PAY_STATUS sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-INVOBETW sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-TOT_AMNT_EURO sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-INVOBETW_EURO sy-vline 
WA_REVMGT_INVOICE_LEVEL1_STR-WAER_EURO sy-vline      INTO ld_text SEPARATED BY SPACE.

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