ABAP Select data from SAP table SZTG_SNEW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SZTG_SNEW
*  INTO TABLE @DATA(IT_SZTG_SNEW2).
*--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_SZTG_SNEW INDEX 1 INTO DATA(WA_SZTG_SNEW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SZTG_SNEW>-CUR_DAY = 1.
<SZTG_SNEW>-TIME_FROM = 1.
<SZTG_SNEW>-TIME_TO = 1.
<SZTG_SNEW>-SLOT = 1.
<SZTG_SNEW>-ROWNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SZTG_SNEW-APPT_ID, sy-vline,
  WA_SZTG_SNEW-APPT_TYPE, sy-vline,
  WA_SZTG_SNEW-MERGEHORIZ, sy-vline,
  WA_SZTG_SNEW-MERGEVERT, sy-vline,
  WA_SZTG_SNEW-COLOR, sy-vline,
  WA_SZTG_SNEW-ICON_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SZTG_SNEW 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_SZTG_SNEW 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_SZTG_SNEW INTO WA_SZTG_SNEW.


*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_SZTG_SNEW_STR, 
CUR_DAY TYPE STRING,
TIME_FROM TYPE STRING,
TIME_TO TYPE STRING,
SLOT TYPE STRING,
ROWNR TYPE STRING,
APPT_ID TYPE STRING,
APPT_TYPE TYPE STRING,
MERGEHORIZ TYPE STRING,
MERGEVERT TYPE STRING,
COLOR TYPE STRING,
ICON_NO TYPE STRING,
IS_ICON TYPE STRING,
STYLE2 TYPE STRING,
DUMMY TYPE STRING,
WEEKDAY_L TYPE STRING,
TXT_SHORT TYPE STRING,
LENGTH_TXT TYPE STRING,
POSITION_H TYPE STRING,
WRITTEN TYPE STRING,
WRITTEN2 TYPE STRING,
ROOM TYPE STRING,
CONFLICTS TYPE STRING,
CONFLICT_N TYPE STRING,
CONFLICT_F TYPE STRING,
CONFL_TAB TYPE STRING,
LAST_ROW TYPE STRING,
NO_OF_ROWS TYPE STRING,
TEXTBREITE TYPE STRING,
APPT_SLOT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SZTG_SNEW_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_SZTG_SNEW_STR-CUR_DAY sy-vline 
WA_SZTG_SNEW_STR-TIME_FROM sy-vline 
WA_SZTG_SNEW_STR-TIME_TO sy-vline 
WA_SZTG_SNEW_STR-SLOT sy-vline 
WA_SZTG_SNEW_STR-ROWNR sy-vline 
WA_SZTG_SNEW_STR-APPT_ID sy-vline 
WA_SZTG_SNEW_STR-APPT_TYPE sy-vline 
WA_SZTG_SNEW_STR-MERGEHORIZ sy-vline 
WA_SZTG_SNEW_STR-MERGEVERT sy-vline 
WA_SZTG_SNEW_STR-COLOR sy-vline 
WA_SZTG_SNEW_STR-ICON_NO sy-vline 
WA_SZTG_SNEW_STR-IS_ICON sy-vline 
WA_SZTG_SNEW_STR-STYLE2 sy-vline 
WA_SZTG_SNEW_STR-DUMMY sy-vline 
WA_SZTG_SNEW_STR-WEEKDAY_L sy-vline 
WA_SZTG_SNEW_STR-TXT_SHORT sy-vline 
WA_SZTG_SNEW_STR-LENGTH_TXT sy-vline 
WA_SZTG_SNEW_STR-POSITION_H sy-vline 
WA_SZTG_SNEW_STR-WRITTEN sy-vline 
WA_SZTG_SNEW_STR-WRITTEN2 sy-vline 
WA_SZTG_SNEW_STR-ROOM sy-vline 
WA_SZTG_SNEW_STR-CONFLICTS sy-vline 
WA_SZTG_SNEW_STR-CONFLICT_N sy-vline 
WA_SZTG_SNEW_STR-CONFLICT_F sy-vline 
WA_SZTG_SNEW_STR-CONFL_TAB sy-vline 
WA_SZTG_SNEW_STR-LAST_ROW sy-vline 
WA_SZTG_SNEW_STR-NO_OF_ROWS sy-vline 
WA_SZTG_SNEW_STR-TEXTBREITE sy-vline 
WA_SZTG_SNEW_STR-APPT_SLOT sy-vline      INTO ld_text SEPARATED BY SPACE.

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