ABAP Select data from SAP table GRIX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GRIX
*  INTO TABLE @DATA(IT_GRIX2).
*--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_GRIX INDEX 1 INTO DATA(WA_GRIX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GRIX>-MANDT = 1.
<GRIX>-HASHV = 1.
<GRIX>-COUNTERV = 1.
<GRIX>-RGJNR = 1.
<GRIX>-HASH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GRIX-COUNTER, sy-vline,
  WA_GRIX-CRNAM, sy-vline,
  WA_GRIX-CRDAT, sy-vline,
  WA_GRIX-CRTIME, sy-vline,
  WA_GRIX-VERSN, sy-vline,
  WA_GRIX-MASTERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GRIX 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_GRIX 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_GRIX INTO WA_GRIX.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_GRIX_STR, 
MANDT TYPE STRING,
HASHV TYPE STRING,
COUNTERV TYPE STRING,
RGJNR TYPE STRING,
HASH TYPE STRING,
COUNTER TYPE STRING,
CRNAM TYPE STRING,
CRDAT TYPE STRING,
CRTIME TYPE STRING,
VERSN TYPE STRING,
MASTERDAT TYPE STRING,
STATUS TYPE STRING,
STATUS_AU TYPE STRING,
GRSIZE TYPE STRING,
VALDATE TYPE STRING,
GRIX_COUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GRIX_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_GRIX_STR-MANDT sy-vline 
WA_GRIX_STR-HASHV sy-vline 
WA_GRIX_STR-COUNTERV sy-vline 
WA_GRIX_STR-RGJNR sy-vline 
WA_GRIX_STR-HASH sy-vline 
WA_GRIX_STR-COUNTER sy-vline 
WA_GRIX_STR-CRNAM sy-vline 
WA_GRIX_STR-CRDAT sy-vline 
WA_GRIX_STR-CRTIME sy-vline 
WA_GRIX_STR-VERSN sy-vline 
WA_GRIX_STR-MASTERDAT sy-vline 
WA_GRIX_STR-STATUS sy-vline 
WA_GRIX_STR-STATUS_AU sy-vline 
WA_GRIX_STR-GRSIZE sy-vline 
WA_GRIX_STR-VALDATE sy-vline 
WA_GRIX_STR-GRIX_COUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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