ABAP Select data from SAP table TCJ_CHECK_STACKS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCJ_CHECK_STACKS
*  INTO TABLE @DATA(IT_TCJ_CHECK_STACKS2).
*--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_TCJ_CHECK_STACKS INDEX 1 INTO DATA(WA_TCJ_CHECK_STACKS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCJ_CHECK_STACKS>-MANDT = 1.
<TCJ_CHECK_STACKS>-COMP_CODE = 1.
<TCJ_CHECK_STACKS>-CAJO_NUMBER = 1.
<TCJ_CHECK_STACKS>-FISC_YEAR = 1.
<TCJ_CHECK_STACKS>-CHECK_STACK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCJ_CHECK_STACKS-TRANSACT_NUMBER, sy-vline,
  WA_TCJ_CHECK_STACKS-POSTING_DATE, sy-vline,
  WA_TCJ_CHECK_STACKS-VALUTA_DATE, sy-vline,
  WA_TCJ_CHECK_STACKS-CHECK_STATUS, sy-vline,
  WA_TCJ_CHECK_STACKS-GL_ACCOUNT, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_TCJ_CHECK_STACKS 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_TCJ_CHECK_STACKS 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_TCJ_CHECK_STACKS INTO WA_TCJ_CHECK_STACKS.


*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 GJAHR, internal->external for field FISC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TCJ_CHECK_STACKS-FISC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCJ_CHECK_STACKS-FISC_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHC, internal->external for field TRANSACT_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHC_OUTPUT'
  EXPORTING
    input =                      WA_TCJ_CHECK_STACKS-TRANSACT_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCJ_CHECK_STACKS-TRANSACT_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GL_ACCOUNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCJ_CHECK_STACKS-GL_ACCOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCJ_CHECK_STACKS-GL_ACCOUNT.
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_TCJ_CHECK_STACKS_STR, 
MANDT TYPE STRING,
COMP_CODE TYPE STRING,
CAJO_NUMBER TYPE STRING,
FISC_YEAR TYPE STRING,
CHECK_STACK TYPE STRING,
TRANSACT_NUMBER TYPE STRING,
POSTING_DATE TYPE STRING,
VALUTA_DATE TYPE STRING,
CHECK_STATUS TYPE STRING,
GL_ACCOUNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCJ_CHECK_STACKS_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_TCJ_CHECK_STACKS_STR-MANDT sy-vline 
WA_TCJ_CHECK_STACKS_STR-COMP_CODE sy-vline 
WA_TCJ_CHECK_STACKS_STR-CAJO_NUMBER sy-vline 
WA_TCJ_CHECK_STACKS_STR-FISC_YEAR sy-vline 
WA_TCJ_CHECK_STACKS_STR-CHECK_STACK sy-vline 
WA_TCJ_CHECK_STACKS_STR-TRANSACT_NUMBER sy-vline 
WA_TCJ_CHECK_STACKS_STR-POSTING_DATE sy-vline 
WA_TCJ_CHECK_STACKS_STR-VALUTA_DATE sy-vline 
WA_TCJ_CHECK_STACKS_STR-CHECK_STATUS sy-vline 
WA_TCJ_CHECK_STACKS_STR-GL_ACCOUNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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