ABAP Select data from SAP table /MERP/MM_RESV_HDR_ENTITY_STR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /MERP/MM_RESV_HDR_ENTITY_STR 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 /MERP/MM_RESV_HDR_ENTITY_STR. 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 /MERP/MM_RESV_HDR_ENTITY_STR 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_/MERP/MM_RESV_HDR_ENTITY_STR TYPE STANDARD TABLE OF /MERP/MM_RESV_HDR_ENTITY_STR,
      WA_/MERP/MM_RESV_HDR_ENTITY_STR TYPE /MERP/MM_RESV_HDR_ENTITY_STR,
      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: </MERP/MM_RESV_HDR_ENTITY_STR> TYPE /MERP/MM_RESV_HDR_ENTITY_STR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /MERP/MM_RESV_HDR_ENTITY_STR
  INTO TABLE IT_/MERP/MM_RESV_HDR_ENTITY_STR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MERP/MM_RESV_HDR_ENTITY_STR
*  INTO TABLE @DATA(IT_/MERP/MM_RESV_HDR_ENTITY_STR2).
*--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_/MERP/MM_RESV_HDR_ENTITY_STR INDEX 1 INTO DATA(WA_/MERP/MM_RESV_HDR_ENTITY_STR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/MERP/MM_RESV_HDR_ENTITY_STR ASSIGNING </MERP/MM_RESV_HDR_ENTITY_STR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MERP/MM_RESV_HDR_ENTITY_STR>-MANDT = 1.
</MERP/MM_RESV_HDR_ENTITY_STR>-RSNUM = 1.
</MERP/MM_RESV_HDR_ENTITY_STR>-KZVER = 1.
</MERP/MM_RESV_HDR_ENTITY_STR>-XCALE = 1.
</MERP/MM_RESV_HDR_ENTITY_STR>-RSDAT = 1.

ENDLOOP.

LOOP AT IT_/MERP/MM_RESV_HDR_ENTITY_STR INTO WA_/MERP/MM_RESV_HDR_ENTITY_STR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MERP/MM_RESV_HDR_ENTITY_STR-USNAM, sy-vline,
  WA_/MERP/MM_RESV_HDR_ENTITY_STR-BWART, sy-vline,
  WA_/MERP/MM_RESV_HDR_ENTITY_STR-WEMPF, sy-vline,
  WA_/MERP/MM_RESV_HDR_ENTITY_STR-KOSTL, sy-vline,
  WA_/MERP/MM_RESV_HDR_ENTITY_STR-PROJN, sy-vline,
  WA_/MERP/MM_RESV_HDR_ENTITY_STR-ANLN1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MERP/MM_RESV_HDR_ENTITY_STR 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_/MERP/MM_RESV_HDR_ENTITY_STR 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_/MERP/MM_RESV_HDR_ENTITY_STR INTO WA_/MERP/MM_RESV_HDR_ENTITY_STR.


*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 KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MERP/MM_RESV_HDR_ENTITY_STR-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MERP/MM_RESV_HDR_ENTITY_STR-KOSTL.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MERP/MM_RESV_HDR_ENTITY_STR-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MERP/MM_RESV_HDR_ENTITY_STR-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_/MERP/MM_RESV_HDR_ENTITY_STR_STR, 
MANDT TYPE STRING,
RSNUM TYPE STRING,
KZVER TYPE STRING,
XCALE TYPE STRING,
RSDAT TYPE STRING,
USNAM TYPE STRING,
BWART TYPE STRING,
WEMPF TYPE STRING,
KOSTL TYPE STRING,
PROJN TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
KUNNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
AUFNR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KDEIN TYPE STRING,
UMWRK TYPE STRING,
UMLGO TYPE STRING,
SERIE TYPE STRING,
KOKRS TYPE STRING,
PARBU TYPE STRING,
PARGB TYPE STRING,
IMKEY TYPE STRING,
KSTRG TYPE STRING,
PAOBJNR TYPE STRING,
PRCTR TYPE STRING,
PS_PSP_PNR TYPE STRING,
NPLNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
VPTNR TYPE STRING,
FIPOS TYPE STRING,
DUMMY_INCL_EEW_COBL TYPE STRING,
RECID TYPE STRING,
FKBER TYPE STRING,
DABRZ TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
PRZNR TYPE STRING,
LSTAR TYPE STRING,
GRANT_NBR TYPE STRING,
BUDGET_PD TYPE STRING,
DUMMY_RKPF_INCL_EEW_PS TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
DISABLE_FETCH TYPE STRING,
OBJTYPE TYPE STRING,
DOC_STATUS TYPE STRING,
HEADER_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MERP/MM_RESV_HDR_ENTITY_STR_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_/MERP/MM_RESV_HDR_ENTITY_STR_STR-MANDT sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-RSNUM sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KZVER sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-XCALE sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-RSDAT sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-USNAM sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-BWART sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-WEMPF sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KOSTL sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-PROJN sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-ANLN1 sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-ANLN2 sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KUNNR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-EBELN sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-EBELP sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-AUFNR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KDAUF sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KDPOS sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KDEIN sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-UMWRK sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-UMLGO sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-SERIE sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KOKRS sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-PARBU sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-PARGB sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-IMKEY sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-KSTRG sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-PAOBJNR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-PRCTR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-PS_PSP_PNR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-NPLNR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-AUFPL sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-APLZL sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-VPTNR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-FIPOS sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-DUMMY_INCL_EEW_COBL sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-RECID sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-FKBER sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-DABRZ sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-FISTL sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-GEBER sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-PRZNR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-LSTAR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-GRANT_NBR sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-BUDGET_PD sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-DUMMY_RKPF_INCL_EEW_PS sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-CREATIONDATETIME sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-LASTCHANGEDBYUSER sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-LASTCHANGEDATETIME sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-DISABLE_FETCH sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-OBJTYPE sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-DOC_STATUS sy-vline 
WA_/MERP/MM_RESV_HDR_ENTITY_STR_STR-HEADER_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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