ABAP Select data from SAP table /MERP/CORE_CHAR_SEG_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/CORE_CHAR_SEG_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/CORE_CHAR_SEG_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/CORE_CHAR_SEG_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/CORE_CHAR_SEG_ENTITY_STR TYPE STANDARD TABLE OF /MERP/CORE_CHAR_SEG_ENTITY_STR,
      WA_/MERP/CORE_CHAR_SEG_ENTITY_STR TYPE /MERP/CORE_CHAR_SEG_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/CORE_CHAR_SEG_ENTITY_STR> TYPE /MERP/CORE_CHAR_SEG_ENTITY_STR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /MERP/CORE_CHAR_SEG_ENTITY_STR
*  INTO TABLE @DATA(IT_/MERP/CORE_CHAR_SEG_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/CORE_CHAR_SEG_ENTITY_STR INDEX 1 INTO DATA(WA_/MERP/CORE_CHAR_SEG_ENTITY_STR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</MERP/CORE_CHAR_SEG_ENTITY_STR>-ATINN = 1.
</MERP/CORE_CHAR_SEG_ENTITY_STR>-ATNAM = 1.
</MERP/CORE_CHAR_SEG_ENTITY_STR>-ATIDN = 1.
</MERP/CORE_CHAR_SEG_ENTITY_STR>-ATFOR = 1.
</MERP/CORE_CHAR_SEG_ENTITY_STR>-ANZST = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ANZDZ, sy-vline,
  WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ATVOR, sy-vline,
  WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ATSCH, sy-vline,
  WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ATKLE, sy-vline,
  WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ATKON, sy-vline,
  WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ATEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/MERP/CORE_CHAR_SEG_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/CORE_CHAR_SEG_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/CORE_CHAR_SEG_ENTITY_STR INTO WA_/MERP/CORE_CHAR_SEG_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 ATINN, internal->external for field ATINN
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ATINN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-ATINN.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/MERP/CORE_CHAR_SEG_ENTITY_STR-DOKNR.
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/CORE_CHAR_SEG_ENTITY_STR_STR, 
ATINN TYPE STRING,
ATNAM TYPE STRING,
ATIDN TYPE STRING,
ATFOR TYPE STRING,
ANZST TYPE STRING,
ANZDZ TYPE STRING,
ATVOR TYPE STRING,
ATSCH TYPE STRING,
ATKLE TYPE STRING,
ATKON TYPE STRING,
ATEND TYPE STRING,
ATAEN TYPE STRING,
ATKLA TYPE STRING,
ATERF TYPE STRING,
ATEIN TYPE STRING,
ATAME TYPE STRING,
ATWME TYPE STRING,
MSEHI TYPE STRING,
ATDIM TYPE STRING,
ATGLO TYPE STRING,
ATGLA TYPE STRING,
ATINT TYPE STRING,
ATUNS TYPE STRING,
ATSON TYPE STRING,
ATTAB TYPE STRING,
ATFEL TYPE STRING,
ATTEI TYPE STRING,
ATPRT TYPE STRING,
ATPRR TYPE STRING,
ATPRF TYPE STRING,
ATWRD TYPE STRING,
ATFOD TYPE STRING,
ATHIE TYPE STRING,
ATDEX TYPE STRING,
ATFGA TYPE STRING,
ATVSC TYPE STRING,
ANAME TYPE STRING,
ADATU TYPE STRING,
VNAME TYPE STRING,
VDATU TYPE STRING,
ATXAC TYPE STRING,
ATYAC TYPE STRING,
ATMST TYPE STRING,
ATWSO TYPE STRING,
ATBSO TYPE STRING,
DATUV_CABN TYPE STRING,
TECHV_CABN TYPE STRING,
AENNR_CABN TYPE STRING,
LKENZ_CABN TYPE STRING,
ATWRI TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
KNOBJ TYPE STRING,
ATINP TYPE STRING,
ATVIE TYPE STRING,
WERKS TYPE STRING,
KATALOGART TYPE STRING,
AUSWAHLMGE TYPE STRING,
ATHKA TYPE STRING,
ATHKO TYPE STRING,
CLINT_CABN TYPE STRING,
ATTOL TYPE STRING,
ATZUS TYPE STRING,
ATVPL TYPE STRING,
ATAUTH TYPE STRING,
COUNTRYGRP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/MERP/CORE_CHAR_SEG_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/CORE_CHAR_SEG_ENTITY_STR_STR-ATINN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATNAM sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATIDN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATFOR sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ANZST sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ANZDZ sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATVOR sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATSCH sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATKLE sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATKON sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATEND sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATAEN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATKLA sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATERF sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATEIN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATAME sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATWME sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-MSEHI sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATDIM sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATGLO sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATGLA sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATINT sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATUNS sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATSON sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATTAB sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATFEL sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATTEI sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATPRT sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATPRR sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATPRF sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATWRD sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATFOD sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATHIE sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATDEX sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATFGA sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATVSC sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ANAME sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ADATU sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-VNAME sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-VDATU sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATXAC sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATYAC sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATMST sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATWSO sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATBSO sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-DATUV_CABN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-TECHV_CABN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-AENNR_CABN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-LKENZ_CABN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATWRI sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-DOKAR sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-DOKNR sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-DOKVR sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-DOKTL sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-KNOBJ sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATINP sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATVIE sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-WERKS sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-KATALOGART sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-AUSWAHLMGE sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATHKA sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATHKO sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-CLINT_CABN sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATTOL sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATZUS sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATVPL sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-ATAUTH sy-vline 
WA_/MERP/CORE_CHAR_SEG_ENTITY_STR_STR-COUNTRYGRP sy-vline      INTO ld_text SEPARATED BY SPACE.

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