ABAP Select data from SAP table IRLOTH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IRLOTH
*  INTO TABLE @DATA(IT_IRLOTH2).
*--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_IRLOTH INDEX 1 INTO DATA(WA_IRLOTH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IRLOTH>-MANDT = 1.
<IRLOTH>-TRPNR = 1.
<IRLOTH>-MLANG = 1.
<IRLOTH>-TPLKZ = 1.
<IRLOTH>-RLTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IRLOTH-TRPMA, sy-vline,
  WA_IRLOTH-ERDAT, sy-vline,
  WA_IRLOTH-ERNAM, sy-vline,
  WA_IRLOTH-AEDAT, sy-vline,
  WA_IRLOTH-AENAM, sy-vline,
  WA_IRLOTH-BEGRU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IRLOTH 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_IRLOTH 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_IRLOTH INTO WA_IRLOTH.


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

*Conversion exit MATN1, internal->external for field SUBMT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IRLOTH-SUBMT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IRLOTH-SUBMT.
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_IRLOTH_STR, 
MANDT TYPE STRING,
TRPNR TYPE STRING,
MLANG TYPE STRING,
TPLKZ TYPE STRING,
RLTYP TYPE STRING,
TRPMA TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
BEGRU TYPE STRING,
LVORM TYPE STRING,
SUBMT TYPE STRING,
MAPAR TYPE STRING,
IEQUI TYPE STRING,
IEQUII TYPE STRING,
EINZL TYPE STRING,
EINZLI TYPE STRING,
IWERK TYPE STRING,
IWERKI TYPE STRING,
INGRP TYPE STRING,
INGRPI TYPE STRING,
PM_OBJTY TYPE STRING,
LGWID TYPE STRING,
LGWIDI TYPE STRING,
RBNR TYPE STRING,
RBNR_I TYPE STRING,
ABCKZ TYPE STRING,
ABCKZI TYPE STRING,
OBJNR TYPE STRING,
HILEV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IRLOTH_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_IRLOTH_STR-MANDT sy-vline 
WA_IRLOTH_STR-TRPNR sy-vline 
WA_IRLOTH_STR-MLANG sy-vline 
WA_IRLOTH_STR-TPLKZ sy-vline 
WA_IRLOTH_STR-RLTYP sy-vline 
WA_IRLOTH_STR-TRPMA sy-vline 
WA_IRLOTH_STR-ERDAT sy-vline 
WA_IRLOTH_STR-ERNAM sy-vline 
WA_IRLOTH_STR-AEDAT sy-vline 
WA_IRLOTH_STR-AENAM sy-vline 
WA_IRLOTH_STR-BEGRU sy-vline 
WA_IRLOTH_STR-LVORM sy-vline 
WA_IRLOTH_STR-SUBMT sy-vline 
WA_IRLOTH_STR-MAPAR sy-vline 
WA_IRLOTH_STR-IEQUI sy-vline 
WA_IRLOTH_STR-IEQUII sy-vline 
WA_IRLOTH_STR-EINZL sy-vline 
WA_IRLOTH_STR-EINZLI sy-vline 
WA_IRLOTH_STR-IWERK sy-vline 
WA_IRLOTH_STR-IWERKI sy-vline 
WA_IRLOTH_STR-INGRP sy-vline 
WA_IRLOTH_STR-INGRPI sy-vline 
WA_IRLOTH_STR-PM_OBJTY sy-vline 
WA_IRLOTH_STR-LGWID sy-vline 
WA_IRLOTH_STR-LGWIDI sy-vline 
WA_IRLOTH_STR-RBNR sy-vline 
WA_IRLOTH_STR-RBNR_I sy-vline 
WA_IRLOTH_STR-ABCKZ sy-vline 
WA_IRLOTH_STR-ABCKZI sy-vline 
WA_IRLOTH_STR-OBJNR sy-vline 
WA_IRLOTH_STR-HILEV sy-vline      INTO ld_text SEPARATED BY SPACE.

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