ABAP Select data from SAP table /CRYSTAL/RSZ_X_VAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /CRYSTAL/RSZ_X_VAR
*  INTO TABLE @DATA(IT_/CRYSTAL/RSZ_X_VAR2).
*--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_/CRYSTAL/RSZ_X_VAR INDEX 1 INTO DATA(WA_/CRYSTAL/RSZ_X_VAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</CRYSTAL/RSZ_X_VAR>-VARUNIID = 1.
</CRYSTAL/RSZ_X_VAR>-VNAM = 1.
</CRYSTAL/RSZ_X_VAR>-VARTYP = 1.
</CRYSTAL/RSZ_X_VAR>-VPROCTP = 1.
</CRYSTAL/RSZ_X_VAR>-IOBJNM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/CRYSTAL/RSZ_X_VAR-VPARSEL, sy-vline,
  WA_/CRYSTAL/RSZ_X_VAR-VARINPUT, sy-vline,
  WA_/CRYSTAL/RSZ_X_VAR-ENTRYTP, sy-vline,
  WA_/CRYSTAL/RSZ_X_VAR-FLAGLH, sy-vline,
  WA_/CRYSTAL/RSZ_X_VAR-FLAGR, sy-vline,
  WA_/CRYSTAL/RSZ_X_VAR-FOFFSET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/CRYSTAL/RSZ_X_VAR 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_/CRYSTAL/RSZ_X_VAR 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_/CRYSTAL/RSZ_X_VAR INTO WA_/CRYSTAL/RSZ_X_VAR.


*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 GENID, internal->external for field QUERYNM
CALL FUNCTION 'CONVERSION_EXIT_GENID_OUTPUT'
  EXPORTING
    input =                      WA_/CRYSTAL/RSZ_X_VAR-QUERYNM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CRYSTAL/RSZ_X_VAR-QUERYNM.
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_/CRYSTAL/RSZ_X_VAR_STR, 
VARUNIID TYPE STRING,
VNAM TYPE STRING,
VARTYP TYPE STRING,
VPROCTP TYPE STRING,
IOBJNM TYPE STRING,
VPARSEL TYPE STRING,
VARINPUT TYPE STRING,
ENTRYTP TYPE STRING,
FLAGLH TYPE STRING,
FLAGR TYPE STRING,
FOFFSET TYPE STRING,
FLENGTH TYPE STRING,
TLENGTH TYPE STRING,
WHFAC TYPE STRING,
MEFAC TYPE STRING,
MWKZ TYPE STRING,
WAERS TYPE STRING,
MEEHT TYPE STRING,
SIGN TYPE STRING,
OPT TYPE STRING,
LOW TYPE STRING,
LOWTXTLG TYPE STRING,
HIGH TYPE STRING,
HIGHTXTLG TYPE STRING,
HIENM TYPE STRING,
VERSION TYPE STRING,
DATETO TYPE STRING,
ATTRINM TYPE STRING,
COMPID TYPE STRING,
INFOCUBE TYPE STRING,
QUERYNM TYPE STRING,
DYNCHANGE TYPE STRING,
TIMESTMP TYPE STRING,
TSTPNM TYPE STRING,
PERSON TYPE STRING,
AS_BOOLEAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/CRYSTAL/RSZ_X_VAR_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_/CRYSTAL/RSZ_X_VAR_STR-VARUNIID sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-VNAM sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-VARTYP sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-VPROCTP sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-IOBJNM sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-VPARSEL sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-VARINPUT sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-ENTRYTP sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-FLAGLH sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-FLAGR sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-FOFFSET sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-FLENGTH sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-TLENGTH sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-WHFAC sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-MEFAC sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-MWKZ sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-WAERS sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-MEEHT sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-SIGN sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-OPT sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-LOW sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-LOWTXTLG sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-HIGH sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-HIGHTXTLG sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-HIENM sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-VERSION sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-DATETO sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-ATTRINM sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-COMPID sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-INFOCUBE sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-QUERYNM sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-DYNCHANGE sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-TIMESTMP sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-TSTPNM sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-PERSON sy-vline 
WA_/CRYSTAL/RSZ_X_VAR_STR-AS_BOOLEAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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