ABAP Select data from SAP table REXC_ESR_QR_HDR_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXC_ESR_QR_HDR_S
*  INTO TABLE @DATA(IT_REXC_ESR_QR_HDR_S2).
*--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_REXC_ESR_QR_HDR_S INDEX 1 INTO DATA(WA_REXC_ESR_QR_HDR_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXC_ESR_QR_HDR_S>-MANDT = 1.
<REXC_ESR_QR_HDR_S>-ESRREFHGUID = 1.
<REXC_ESR_QR_HDR_S>-PO_REF_NO = 1.
<REXC_ESR_QR_HDR_S>-BUKRS = 1.
<REXC_ESR_QR_HDR_S>-PARTNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXC_ESR_QR_HDR_S-QRIBAN, sy-vline,
  WA_REXC_ESR_QR_HDR_S-PO_AMOUNT, sy-vline,
  WA_REXC_ESR_QR_HDR_S-CONDCURR, sy-vline,
  WA_REXC_ESR_QR_HDR_S-DBERVON, sy-vline,
  WA_REXC_ESR_QR_HDR_S-DBERBIS, sy-vline,
  WA_REXC_ESR_QR_HDR_S-PO_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXC_ESR_QR_HDR_S 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_REXC_ESR_QR_HDR_S 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_REXC_ESR_QR_HDR_S INTO WA_REXC_ESR_QR_HDR_S.


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

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXC_ESR_QR_HDR_S-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_ESR_QR_HDR_S-PARTNER.
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_REXC_ESR_QR_HDR_S_STR, 
MANDT TYPE STRING,
ESRREFHGUID TYPE STRING,
PO_REF_NO TYPE STRING,
BUKRS TYPE STRING,
PARTNER TYPE STRING,
QRIBAN TYPE STRING,
PO_AMOUNT TYPE STRING,
CONDCURR TYPE STRING,
DBERVON TYPE STRING,
DBERBIS TYPE STRING,
PO_TEXT TYPE STRING,
ESRREFDELFITXT TYPE STRING,
ALLDOCPROCESSED TYPE STRING,
ACCEPTDIFFAMOUNT TYPE STRING,
INVALID TYPE STRING,
RERF TYPE STRING,
DERF TYPE STRING,
TERF TYPE STRING,
REHER TYPE STRING,
RBEAR TYPE STRING,
DBEAR TYPE STRING,
TBEAR TYPE STRING,
RBHER TYPE STRING,
TOT_AMOUNT TYPE STRING,
DIFF_AMOUNT TYPE STRING,
XBUKRS TYPE STRING,
BPXNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXC_ESR_QR_HDR_S_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_REXC_ESR_QR_HDR_S_STR-MANDT sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-ESRREFHGUID sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-PO_REF_NO sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-BUKRS sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-PARTNER sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-QRIBAN sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-PO_AMOUNT sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-CONDCURR sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-DBERVON sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-DBERBIS sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-PO_TEXT sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-ESRREFDELFITXT sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-ALLDOCPROCESSED sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-ACCEPTDIFFAMOUNT sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-INVALID sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-RERF sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-DERF sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-TERF sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-REHER sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-RBEAR sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-DBEAR sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-TBEAR sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-RBHER sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-TOT_AMOUNT sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-DIFF_AMOUNT sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-XBUKRS sy-vline 
WA_REXC_ESR_QR_HDR_S_STR-BPXNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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