ABAP Select data from SAP table CALC_JOIN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CALC_JOIN
*  INTO TABLE @DATA(IT_CALC_JOIN2).
*--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_CALC_JOIN INDEX 1 INTO DATA(WA_CALC_JOIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CALC_JOIN>-ROW_SEQ = 1.
<CALC_JOIN>-COL_SEQ = 1.
<CALC_JOIN>-ROW = 1.
<CALC_JOIN>-COL = 1.
<CALC_JOIN>-SIGN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CALC_JOIN-VALUE, sy-vline,
  WA_CALC_JOIN-UOM, sy-vline,
  WA_CALC_JOIN-FORMULA, sy-vline,
  WA_CALC_JOIN-FORM_IND, sy-vline,
  WA_CALC_JOIN-FORM_ORD, sy-vline,
  WA_CALC_JOIN-VALUE_OVR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CALC_JOIN 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_CALC_JOIN 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_CALC_JOIN INTO WA_CALC_JOIN.


*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_CALC_JOIN_STR, 
ROW_SEQ TYPE STRING,
COL_SEQ TYPE STRING,
ROW TYPE STRING,
COL TYPE STRING,
SIGN TYPE STRING,
VALUE TYPE STRING,
UOM TYPE STRING,
FORMULA TYPE STRING,
FORM_IND TYPE STRING,
FORM_ORD TYPE STRING,
VALUE_OVR TYPE STRING,
KZF_CHNGED TYPE STRING,
CALC_EXPLICITLY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CALC_JOIN_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_CALC_JOIN_STR-ROW_SEQ sy-vline 
WA_CALC_JOIN_STR-COL_SEQ sy-vline 
WA_CALC_JOIN_STR-ROW sy-vline 
WA_CALC_JOIN_STR-COL sy-vline 
WA_CALC_JOIN_STR-SIGN sy-vline 
WA_CALC_JOIN_STR-VALUE sy-vline 
WA_CALC_JOIN_STR-UOM sy-vline 
WA_CALC_JOIN_STR-FORMULA sy-vline 
WA_CALC_JOIN_STR-FORM_IND sy-vline 
WA_CALC_JOIN_STR-FORM_ORD sy-vline 
WA_CALC_JOIN_STR-VALUE_OVR sy-vline 
WA_CALC_JOIN_STR-KZF_CHNGED sy-vline 
WA_CALC_JOIN_STR-CALC_EXPLICITLY sy-vline      INTO ld_text SEPARATED BY SPACE.

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