ABAP Select data from SAP table SQL_TTZDV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SQL_TTZDV
*  INTO TABLE @DATA(IT_SQL_TTZDV2).
*--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_SQL_TTZDV INDEX 1 INTO DATA(WA_SQL_TTZDV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SQL_TTZDV>-CLIENT = 1.
<SQL_TTZDV>-DSTRULE = 1.
<SQL_TTZDV>-YEARFROM = 1.
<SQL_TTZDV>-MONTHFROM = 1.
<SQL_TTZDV>-WEEKDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SQL_TTZDV-WEEKDCFROM, sy-vline,
  WA_SQL_TTZDV-TIMEFROM, sy-vline,
  WA_SQL_TTZDV-MONTHTO, sy-vline,
  WA_SQL_TTZDV-WEEKDTO, sy-vline,
  WA_SQL_TTZDV-WEEKDCTO, sy-vline,
  WA_SQL_TTZDV-TIMETO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SQL_TTZDV 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_SQL_TTZDV 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_SQL_TTZDV INTO WA_SQL_TTZDV.


*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 YEARFROM
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_SQL_TTZDV-YEARFROM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SQL_TTZDV-YEARFROM.
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_SQL_TTZDV_STR, 
CLIENT TYPE STRING,
DSTRULE TYPE STRING,
YEARFROM TYPE STRING,
MONTHFROM TYPE STRING,
WEEKDFROM TYPE STRING,
WEEKDCFROM TYPE STRING,
TIMEFROM TYPE STRING,
MONTHTO TYPE STRING,
WEEKDTO TYPE STRING,
WEEKDCTO TYPE STRING,
TIMETO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SQL_TTZDV_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_SQL_TTZDV_STR-CLIENT sy-vline 
WA_SQL_TTZDV_STR-DSTRULE sy-vline 
WA_SQL_TTZDV_STR-YEARFROM sy-vline 
WA_SQL_TTZDV_STR-MONTHFROM sy-vline 
WA_SQL_TTZDV_STR-WEEKDFROM sy-vline 
WA_SQL_TTZDV_STR-WEEKDCFROM sy-vline 
WA_SQL_TTZDV_STR-TIMEFROM sy-vline 
WA_SQL_TTZDV_STR-MONTHTO sy-vline 
WA_SQL_TTZDV_STR-WEEKDTO sy-vline 
WA_SQL_TTZDV_STR-WEEKDCTO sy-vline 
WA_SQL_TTZDV_STR-TIMETO sy-vline      INTO ld_text SEPARATED BY SPACE.

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