ABAP Select data from SAP table MEREQ_ACCOUNTING into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MEREQ_ACCOUNTING 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_ACCOUNTING. 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_ACCOUNTING 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_ACCOUNTING TYPE STANDARD TABLE OF MEREQ_ACCOUNTING,
      WA_MEREQ_ACCOUNTING TYPE MEREQ_ACCOUNTING,
      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_ACCOUNTING> TYPE MEREQ_ACCOUNTING.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MEREQ_ACCOUNTING
*  INTO TABLE @DATA(IT_MEREQ_ACCOUNTING2).
*--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_ACCOUNTING INDEX 1 INTO DATA(WA_MEREQ_ACCOUNTING2).


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

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

ENDLOOP.

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

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


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

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-NPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-NPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VPTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-VPTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-VPTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-FIPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-RECID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-KBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-KBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRZNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-PRZNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-PRZNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MEREQ_ACCOUNTING-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MEREQ_ACCOUNTING-GRANT_NBR.
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_MEREQ_ACCOUNTING_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,
DUMMY_INCL_EEW_COBL 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,
GRANT_NBR TYPE STRING,
BUDGET_PD TYPE STRING,
FMFGUS_KEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MEREQ_ACCOUNTING_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_ACCOUNTING_STR-ZEBKN sy-vline 
WA_MEREQ_ACCOUNTING_STR-LOEKZ sy-vline 
WA_MEREQ_ACCOUNTING_STR-ERDAT sy-vline 
WA_MEREQ_ACCOUNTING_STR-ERNAM sy-vline 
WA_MEREQ_ACCOUNTING_STR-MENGE sy-vline 
WA_MEREQ_ACCOUNTING_STR-VPROZ sy-vline 
WA_MEREQ_ACCOUNTING_STR-SAKTO sy-vline 
WA_MEREQ_ACCOUNTING_STR-GSBER sy-vline 
WA_MEREQ_ACCOUNTING_STR-KOSTL sy-vline 
WA_MEREQ_ACCOUNTING_STR-PROJN sy-vline 
WA_MEREQ_ACCOUNTING_STR-VBELN sy-vline 
WA_MEREQ_ACCOUNTING_STR-VBELP sy-vline 
WA_MEREQ_ACCOUNTING_STR-VETEN sy-vline 
WA_MEREQ_ACCOUNTING_STR-ANLN1 sy-vline 
WA_MEREQ_ACCOUNTING_STR-ANLN2 sy-vline 
WA_MEREQ_ACCOUNTING_STR-AUFNR sy-vline 
WA_MEREQ_ACCOUNTING_STR-WEMPF sy-vline 
WA_MEREQ_ACCOUNTING_STR-ABLAD sy-vline 
WA_MEREQ_ACCOUNTING_STR-KOKRS sy-vline 
WA_MEREQ_ACCOUNTING_STR-XBKST sy-vline 
WA_MEREQ_ACCOUNTING_STR-XBAUF sy-vline 
WA_MEREQ_ACCOUNTING_STR-XBPRO sy-vline 
WA_MEREQ_ACCOUNTING_STR-KSTRG sy-vline 
WA_MEREQ_ACCOUNTING_STR-PAOBJNR sy-vline 
WA_MEREQ_ACCOUNTING_STR-PRCTR sy-vline 
WA_MEREQ_ACCOUNTING_STR-PS_PSP_PNR sy-vline 
WA_MEREQ_ACCOUNTING_STR-NPLNR sy-vline 
WA_MEREQ_ACCOUNTING_STR-AUFPL sy-vline 
WA_MEREQ_ACCOUNTING_STR-IMKEY sy-vline 
WA_MEREQ_ACCOUNTING_STR-APLZL sy-vline 
WA_MEREQ_ACCOUNTING_STR-VPTNR sy-vline 
WA_MEREQ_ACCOUNTING_STR-FIPOS sy-vline 
WA_MEREQ_ACCOUNTING_STR-RECID sy-vline 
WA_MEREQ_ACCOUNTING_STR-DUMMY_INCL_EEW_COBL sy-vline 
WA_MEREQ_ACCOUNTING_STR-FISTL sy-vline 
WA_MEREQ_ACCOUNTING_STR-GEBER sy-vline 
WA_MEREQ_ACCOUNTING_STR-FKBER sy-vline 
WA_MEREQ_ACCOUNTING_STR-DABRZ sy-vline 
WA_MEREQ_ACCOUNTING_STR-NETWR sy-vline 
WA_MEREQ_ACCOUNTING_STR-AUFPL_ORD sy-vline 
WA_MEREQ_ACCOUNTING_STR-APLZL_ORD sy-vline 
WA_MEREQ_ACCOUNTING_STR-KBLNR sy-vline 
WA_MEREQ_ACCOUNTING_STR-KBLPOS sy-vline 
WA_MEREQ_ACCOUNTING_STR-LSTAR sy-vline 
WA_MEREQ_ACCOUNTING_STR-PRZNR sy-vline 
WA_MEREQ_ACCOUNTING_STR-GRANT_NBR sy-vline 
WA_MEREQ_ACCOUNTING_STR-BUDGET_PD sy-vline 
WA_MEREQ_ACCOUNTING_STR-FMFGUS_KEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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