ABAP Select data from SAP table E2LTRQI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2LTRQI 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 E2LTRQI. 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 E2LTRQI 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_E2LTRQI TYPE STANDARD TABLE OF E2LTRQI,
      WA_E2LTRQI TYPE E2LTRQI,
      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: <E2LTRQI> TYPE E2LTRQI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2LTRQI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2LTRQI
  INTO TABLE IT_E2LTRQI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2LTRQI
*  INTO TABLE @DATA(IT_E2LTRQI2).
*--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_E2LTRQI INDEX 1 INTO DATA(WA_E2LTRQI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2LTRQI ASSIGNING <E2LTRQI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2LTRQI>-TBPOS = 1.
<E2LTRQI>-MATNR = 1.
<E2LTRQI>-WERKS = 1.
<E2LTRQI>-BESTQ = 1.
<E2LTRQI>-CHARG = 1.

ENDLOOP.

LOOP AT IT_E2LTRQI INTO WA_E2LTRQI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2LTRQI-SOBKZ, sy-vline,
  WA_E2LTRQI-LSONR, sy-vline,
  WA_E2LTRQI-MENGE, sy-vline,
  WA_E2LTRQI-MEINS, sy-vline,
  WA_E2LTRQI-WEMPF, sy-vline,
  WA_E2LTRQI-ABLAD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2LTRQI 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_E2LTRQI 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_E2LTRQI INTO WA_E2LTRQI.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_E2LTRQI-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2LTRQI-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WENUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2LTRQI-WENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2LTRQI-WENUM.
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_E2LTRQI_STR, 
TBPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
BESTQ TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LSONR TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
WENUM TYPE STRING,
WDATU TYPE STRING,
ZEUGN TYPE STRING,
ELIKZ TYPE STRING,
VFDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2LTRQI_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_E2LTRQI_STR-TBPOS sy-vline 
WA_E2LTRQI_STR-MATNR sy-vline 
WA_E2LTRQI_STR-WERKS sy-vline 
WA_E2LTRQI_STR-BESTQ sy-vline 
WA_E2LTRQI_STR-CHARG sy-vline 
WA_E2LTRQI_STR-SOBKZ sy-vline 
WA_E2LTRQI_STR-LSONR sy-vline 
WA_E2LTRQI_STR-MENGE sy-vline 
WA_E2LTRQI_STR-MEINS sy-vline 
WA_E2LTRQI_STR-WEMPF sy-vline 
WA_E2LTRQI_STR-ABLAD sy-vline 
WA_E2LTRQI_STR-WENUM sy-vline 
WA_E2LTRQI_STR-WDATU sy-vline 
WA_E2LTRQI_STR-ZEUGN sy-vline 
WA_E2LTRQI_STR-ELIKZ sy-vline 
WA_E2LTRQI_STR-VFDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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