ABAP Select data from SAP table CCIHS_MJHITKEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCIHS_MJHITKEY
*  INTO TABLE @DATA(IT_CCIHS_MJHITKEY2).
*--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_CCIHS_MJHITKEY INDEX 1 INTO DATA(WA_CCIHS_MJHITKEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCIHS_MJHITKEY>-RECN = 1.
<CCIHS_MJHITKEY>-ACTN = 1.
<CCIHS_MJHITKEY>-RECNROOT = 1.
<CCIHS_MJHITKEY>-ACTNROOT = 1.
<CCIHS_MJHITKEY>-RECNTMPWA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCIHS_MJHITKEY-ACTNTMPWA, sy-vline,
  WA_CCIHS_MJHITKEY-MJID, sy-vline,
  WA_CCIHS_MJHITKEY-MJSTAT, sy-vline,
  WA_CCIHS_MJHITKEY-LIMEXCEEDFLG, sy-vline,
  WA_CCIHS_MJHITKEY-MJCATTXT, sy-vline,
  WA_CCIHS_MJHITKEY-MJCAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCIHS_MJHITKEY 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_CCIHS_MJHITKEY 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_CCIHS_MJHITKEY INTO WA_CCIHS_MJHITKEY.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ACTNTMPWA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CCIHS_MJHITKEY-ACTNTMPWA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCIHS_MJHITKEY-ACTNTMPWA.
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_CCIHS_MJHITKEY_STR, 
RECN TYPE STRING,
ACTN TYPE STRING,
RECNROOT TYPE STRING,
ACTNROOT TYPE STRING,
RECNTMPWA TYPE STRING,
ACTNTMPWA TYPE STRING,
MJID TYPE STRING,
MJSTAT TYPE STRING,
LIMEXCEEDFLG TYPE STRING,
MJCATTXT TYPE STRING,
MJCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCIHS_MJHITKEY_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_CCIHS_MJHITKEY_STR-RECN sy-vline 
WA_CCIHS_MJHITKEY_STR-ACTN sy-vline 
WA_CCIHS_MJHITKEY_STR-RECNROOT sy-vline 
WA_CCIHS_MJHITKEY_STR-ACTNROOT sy-vline 
WA_CCIHS_MJHITKEY_STR-RECNTMPWA sy-vline 
WA_CCIHS_MJHITKEY_STR-ACTNTMPWA sy-vline 
WA_CCIHS_MJHITKEY_STR-MJID sy-vline 
WA_CCIHS_MJHITKEY_STR-MJSTAT sy-vline 
WA_CCIHS_MJHITKEY_STR-LIMEXCEEDFLG sy-vline 
WA_CCIHS_MJHITKEY_STR-MJCATTXT sy-vline 
WA_CCIHS_MJHITKEY_STR-MJCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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