ABAP Select data from SAP table LRQSI into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LRQSI
*  INTO TABLE @DATA(IT_LRQSI2).
*--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_LRQSI INDEX 1 INTO DATA(WA_LRQSI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LRQSI>-MANDT = 1.
<LRQSI>-LOCAT = 1.
<LRQSI>-REQST = 1.
<LRQSI>-RQITM = 1.
<LRQSI>-PRSMD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LRQSI-GRPRF, sy-vline,
  WA_LRQSI-RPRNT, sy-vline,
  WA_LRQSI-MIXHU, sy-vline,
  WA_LRQSI-RIRFL, sy-vline,
  WA_LRQSI-RIGRP, sy-vline,
  WA_LRQSI-RQITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LRQSI 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_LRQSI 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_LRQSI INTO WA_LRQSI.


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

*Conversion exit ALPHA, internal->external for field HUNUMDST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LRQSI-HUNUMDST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LRQSI-HUNUMDST.
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_LRQSI_STR, 
MANDT TYPE STRING,
LOCAT TYPE STRING,
REQST TYPE STRING,
RQITM TYPE STRING,
PRSMD TYPE STRING,
GRPRF TYPE STRING,
RPRNT TYPE STRING,
MIXHU TYPE STRING,
RIRFL TYPE STRING,
RIGRP TYPE STRING,
RQITY TYPE STRING,
RQACT TYPE STRING,
RISTS TYPE STRING,
RZONESRC TYPE STRING,
BINCXSRC TYPE STRING,
BINCYSRC TYPE STRING,
BINCZSRC TYPE STRING,
RNODESRC TYPE STRING,
RZONEDST TYPE STRING,
BINCXDST TYPE STRING,
BINCYDST TYPE STRING,
BINCZDST TYPE STRING,
RNODEDST TYPE STRING,
HUNUMSRC TYPE STRING,
HUTYPSRC TYPE STRING,
HUNUMDST TYPE STRING,
HUTYPDST TYPE STRING,
LTRM_DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LRQSI_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_LRQSI_STR-MANDT sy-vline 
WA_LRQSI_STR-LOCAT sy-vline 
WA_LRQSI_STR-REQST sy-vline 
WA_LRQSI_STR-RQITM sy-vline 
WA_LRQSI_STR-PRSMD sy-vline 
WA_LRQSI_STR-GRPRF sy-vline 
WA_LRQSI_STR-RPRNT sy-vline 
WA_LRQSI_STR-MIXHU sy-vline 
WA_LRQSI_STR-RIRFL sy-vline 
WA_LRQSI_STR-RIGRP sy-vline 
WA_LRQSI_STR-RQITY sy-vline 
WA_LRQSI_STR-RQACT sy-vline 
WA_LRQSI_STR-RISTS sy-vline 
WA_LRQSI_STR-RZONESRC sy-vline 
WA_LRQSI_STR-BINCXSRC sy-vline 
WA_LRQSI_STR-BINCYSRC sy-vline 
WA_LRQSI_STR-BINCZSRC sy-vline 
WA_LRQSI_STR-RNODESRC sy-vline 
WA_LRQSI_STR-RZONEDST sy-vline 
WA_LRQSI_STR-BINCXDST sy-vline 
WA_LRQSI_STR-BINCYDST sy-vline 
WA_LRQSI_STR-BINCZDST sy-vline 
WA_LRQSI_STR-RNODEDST sy-vline 
WA_LRQSI_STR-HUNUMSRC sy-vline 
WA_LRQSI_STR-HUTYPSRC sy-vline 
WA_LRQSI_STR-HUNUMDST sy-vline 
WA_LRQSI_STR-HUTYPDST sy-vline 
WA_LRQSI_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.