ABAP Select data from SAP table MEREQ_ACCOUNTINGX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEREQ_ACCOUNTINGX
*  INTO TABLE @DATA(IT_MEREQ_ACCOUNTINGX2).
*--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_MEREQ_ACCOUNTINGX INDEX 1 INTO DATA(WA_MEREQ_ACCOUNTINGX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MEREQ_ACCOUNTINGX>-ZEBKN = 1.
<MEREQ_ACCOUNTINGX>-LOEKZ = 1.
<MEREQ_ACCOUNTINGX>-ERDAT = 1.
<MEREQ_ACCOUNTINGX>-ERNAM = 1.
<MEREQ_ACCOUNTINGX>-MENGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MEREQ_ACCOUNTINGX-VPROZ, sy-vline,
  WA_MEREQ_ACCOUNTINGX-SAKTO, sy-vline,
  WA_MEREQ_ACCOUNTINGX-GSBER, sy-vline,
  WA_MEREQ_ACCOUNTINGX-KOSTL, sy-vline,
  WA_MEREQ_ACCOUNTINGX-PROJN, sy-vline,
  WA_MEREQ_ACCOUNTINGX-VBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MEREQ_ACCOUNTINGX 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_MEREQ_ACCOUNTINGX 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_MEREQ_ACCOUNTINGX INTO WA_MEREQ_ACCOUNTINGX.


*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_MEREQ_ACCOUNTINGX_STR, 
ZEBKN TYPE STRING,
LOEKZ TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
MENGE TYPE STRING,
VPROZ TYPE STRING,
SAKTO TYPE STRING,
GSBER TYPE STRING,
KOSTL TYPE STRING,
PROJN TYPE STRING,
VBELN TYPE STRING,
VBELP TYPE STRING,
VETEN TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
AUFNR TYPE STRING,
WEMPF TYPE STRING,
ABLAD TYPE STRING,
KOKRS TYPE STRING,
XBKST TYPE STRING,
XBAUF TYPE STRING,
XBPRO TYPE STRING,
KSTRG TYPE STRING,
PAOBJNR TYPE STRING,
PRCTR TYPE STRING,
PS_PSP_PNR TYPE STRING,
NPLNR TYPE STRING,
AUFPL TYPE STRING,
IMKEY TYPE STRING,
APLZL TYPE STRING,
VPTNR TYPE STRING,
FIPOS TYPE STRING,
RECID TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
FKBER TYPE STRING,
DABRZ TYPE STRING,
NETWR TYPE STRING,
AUFPL_ORD TYPE STRING,
APLZL_ORD TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,
LSTAR TYPE STRING,
PRZNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEREQ_ACCOUNTINGX_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_MEREQ_ACCOUNTINGX_STR-ZEBKN sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-LOEKZ sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-ERDAT sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-ERNAM sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-MENGE sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-VPROZ sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-SAKTO sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-GSBER sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-KOSTL sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-PROJN sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-VBELN sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-VBELP sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-VETEN sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-ANLN1 sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-ANLN2 sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-AUFNR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-WEMPF sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-ABLAD sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-KOKRS sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-XBKST sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-XBAUF sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-XBPRO sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-KSTRG sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-PAOBJNR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-PRCTR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-PS_PSP_PNR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-NPLNR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-AUFPL sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-IMKEY sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-APLZL sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-VPTNR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-FIPOS sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-RECID sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-FISTL sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-GEBER sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-FKBER sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-DABRZ sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-NETWR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-AUFPL_ORD sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-APLZL_ORD sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-KBLNR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-KBLPOS sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-LSTAR sy-vline 
WA_MEREQ_ACCOUNTINGX_STR-PRZNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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