ABAP Select data from SAP table LIRQH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LIRQH
*  INTO TABLE @DATA(IT_LIRQH2).
*--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_LIRQH INDEX 1 INTO DATA(WA_LIRQH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LIRQH>-LOCAT = 1.
<LIRQH>-ORGLV1DC = 1.
<LIRQH>-ORGLV2DC = 1.
<LIRQH>-ORGLV3DC = 1.
<LIRQH>-ORGLV1GR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LIRQH-ORGLV2GR, sy-vline,
  WA_LIRQH-ORGLV3GR, sy-vline,
  WA_LIRQH-GRFLG, sy-vline,
  WA_LIRQH-DOCTY, sy-vline,
  WA_LIRQH-DUEDT, sy-vline,
  WA_LIRQH-DUETM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LIRQH 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_LIRQH 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_LIRQH INTO WA_LIRQH.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LIRQH_STR, 
LOCAT TYPE STRING,
ORGLV1DC TYPE STRING,
ORGLV2DC TYPE STRING,
ORGLV3DC TYPE STRING,
ORGLV1GR TYPE STRING,
ORGLV2GR TYPE STRING,
ORGLV3GR TYPE STRING,
GRFLG TYPE STRING,
DOCTY TYPE STRING,
DUEDT TYPE STRING,
DUETM TYPE STRING,
DOCPR TYPE STRING,
LTRM_DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LIRQH_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_LIRQH_STR-LOCAT sy-vline 
WA_LIRQH_STR-ORGLV1DC sy-vline 
WA_LIRQH_STR-ORGLV2DC sy-vline 
WA_LIRQH_STR-ORGLV3DC sy-vline 
WA_LIRQH_STR-ORGLV1GR sy-vline 
WA_LIRQH_STR-ORGLV2GR sy-vline 
WA_LIRQH_STR-ORGLV3GR sy-vline 
WA_LIRQH_STR-GRFLG sy-vline 
WA_LIRQH_STR-DOCTY sy-vline 
WA_LIRQH_STR-DUEDT sy-vline 
WA_LIRQH_STR-DUETM sy-vline 
WA_LIRQH_STR-DOCPR sy-vline 
WA_LIRQH_STR-LTRM_DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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