ABAP Select data from SAP table RJHAGAP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RJHAGAP
*  INTO TABLE @DATA(IT_RJHAGAP2).
*--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_RJHAGAP INDEX 1 INTO DATA(WA_RJHAGAP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RJHAGAP>-MANDT = 1.
<RJHAGAP>-AVM_NR = 1.
<RJHAGAP>-POS_NR = 1.
<RJHAGAP>-GRUPPABRNR = 1.
<RJHAGAP>-CLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RJHAGAP-UNAME, sy-vline,
  WA_RJHAGAP-DATUM, sy-vline,
  WA_RJHAGAP-UZEIT, sy-vline,
  WA_RJHAGAP-TCODE, sy-vline,
  WA_RJHAGAP-REPID, sy-vline,
  WA_RJHAGAP-BATCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RJHAGAP 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_RJHAGAP 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_RJHAGAP INTO WA_RJHAGAP.


*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 AVM_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RJHAGAP-AVM_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RJHAGAP-AVM_NR.
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_RJHAGAP_STR, 
MANDT TYPE STRING,
AVM_NR TYPE STRING,
POS_NR TYPE STRING,
GRUPPABRNR TYPE STRING,
CLASS TYPE STRING,
UNAME TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
TCODE TYPE STRING,
REPID TYPE STRING,
BATCH TYPE STRING,
BINPT TYPE STRING,
DIALG TYPE STRING,
CLASST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RJHAGAP_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_RJHAGAP_STR-MANDT sy-vline 
WA_RJHAGAP_STR-AVM_NR sy-vline 
WA_RJHAGAP_STR-POS_NR sy-vline 
WA_RJHAGAP_STR-GRUPPABRNR sy-vline 
WA_RJHAGAP_STR-CLASS sy-vline 
WA_RJHAGAP_STR-UNAME sy-vline 
WA_RJHAGAP_STR-DATUM sy-vline 
WA_RJHAGAP_STR-UZEIT sy-vline 
WA_RJHAGAP_STR-TCODE sy-vline 
WA_RJHAGAP_STR-REPID sy-vline 
WA_RJHAGAP_STR-BATCH sy-vline 
WA_RJHAGAP_STR-BINPT sy-vline 
WA_RJHAGAP_STR-DIALG sy-vline 
WA_RJHAGAP_STR-CLASST sy-vline      INTO ld_text SEPARATED BY SPACE.

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