ABAP Select data from SAP table TZONCOMPDA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TZONCOMPDA
*  INTO TABLE @DATA(IT_TZONCOMPDA2).
*--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_TZONCOMPDA INDEX 1 INTO DATA(WA_TZONCOMPDA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TZONCOMPDA>-TZONOFFSET = 1.
<TZONCOMPDA>-DST1BEGDAL = 1.
<TZONCOMPDA>-DST1BEGTIL = 1.
<TZONCOMPDA>-DST1ENDDAL = 1.
<TZONCOMPDA>-DST1ENDTIL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TZONCOMPDA-DST1BEGDAU, sy-vline,
  WA_TZONCOMPDA-DST1BEGTIU, sy-vline,
  WA_TZONCOMPDA-DST1ENDDAU, sy-vline,
  WA_TZONCOMPDA-DST1ENDTIU, sy-vline,
  WA_TZONCOMPDA-DST1OFFSET, sy-vline,
  WA_TZONCOMPDA-DST2BEGDAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TZONCOMPDA 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_TZONCOMPDA 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_TZONCOMPDA INTO WA_TZONCOMPDA.


*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_TZONCOMPDA_STR, 
TZONOFFSET TYPE STRING,
DST1BEGDAL TYPE STRING,
DST1BEGTIL TYPE STRING,
DST1ENDDAL TYPE STRING,
DST1ENDTIL TYPE STRING,
DST1BEGDAU TYPE STRING,
DST1BEGTIU TYPE STRING,
DST1ENDDAU TYPE STRING,
DST1ENDTIU TYPE STRING,
DST1OFFSET TYPE STRING,
DST2BEGDAL TYPE STRING,
DST2BEGTIL TYPE STRING,
DST2ENDDAL TYPE STRING,
DST2ENDTIL TYPE STRING,
DST2BEGDAU TYPE STRING,
DST2BEGTIU TYPE STRING,
DST2ENDDAU TYPE STRING,
DST2ENDTIU TYPE STRING,
DST2OFFSET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TZONCOMPDA_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_TZONCOMPDA_STR-TZONOFFSET sy-vline 
WA_TZONCOMPDA_STR-DST1BEGDAL sy-vline 
WA_TZONCOMPDA_STR-DST1BEGTIL sy-vline 
WA_TZONCOMPDA_STR-DST1ENDDAL sy-vline 
WA_TZONCOMPDA_STR-DST1ENDTIL sy-vline 
WA_TZONCOMPDA_STR-DST1BEGDAU sy-vline 
WA_TZONCOMPDA_STR-DST1BEGTIU sy-vline 
WA_TZONCOMPDA_STR-DST1ENDDAU sy-vline 
WA_TZONCOMPDA_STR-DST1ENDTIU sy-vline 
WA_TZONCOMPDA_STR-DST1OFFSET sy-vline 
WA_TZONCOMPDA_STR-DST2BEGDAL sy-vline 
WA_TZONCOMPDA_STR-DST2BEGTIL sy-vline 
WA_TZONCOMPDA_STR-DST2ENDDAL sy-vline 
WA_TZONCOMPDA_STR-DST2ENDTIL sy-vline 
WA_TZONCOMPDA_STR-DST2BEGDAU sy-vline 
WA_TZONCOMPDA_STR-DST2BEGTIU sy-vline 
WA_TZONCOMPDA_STR-DST2ENDDAU sy-vline 
WA_TZONCOMPDA_STR-DST2ENDTIU sy-vline 
WA_TZONCOMPDA_STR-DST2OFFSET sy-vline      INTO ld_text SEPARATED BY SPACE.

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