ABAP Select data from SAP table /SAPAPO/DD_LOG_DETAIL_STRUC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/DD_LOG_DETAIL_STRUC 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 /SAPAPO/DD_LOG_DETAIL_STRUC. 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 /SAPAPO/DD_LOG_DETAIL_STRUC 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_/SAPAPO/DD_LOG_DETAIL_STRUC TYPE STANDARD TABLE OF /SAPAPO/DD_LOG_DETAIL_STRUC,
      WA_/SAPAPO/DD_LOG_DETAIL_STRUC TYPE /SAPAPO/DD_LOG_DETAIL_STRUC,
      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: </SAPAPO/DD_LOG_DETAIL_STRUC> TYPE /SAPAPO/DD_LOG_DETAIL_STRUC.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/DD_LOG_DETAIL_STRUC
  INTO TABLE IT_/SAPAPO/DD_LOG_DETAIL_STRUC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/DD_LOG_DETAIL_STRUC
*  INTO TABLE @DATA(IT_/SAPAPO/DD_LOG_DETAIL_STRUC2).
*--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_/SAPAPO/DD_LOG_DETAIL_STRUC INDEX 1 INTO DATA(WA_/SAPAPO/DD_LOG_DETAIL_STRUC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/DD_LOG_DETAIL_STRUC ASSIGNING </SAPAPO/DD_LOG_DETAIL_STRUC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/DD_LOG_DETAIL_STRUC>-LOG_HANDLE = 1.
</SAPAPO/DD_LOG_DETAIL_STRUC>-HEUR_RUN_COUNT = 1.
</SAPAPO/DD_LOG_DETAIL_STRUC>-RESID = 1.
</SAPAPO/DD_LOG_DETAIL_STRUC>-ORDERID = 1.
</SAPAPO/DD_LOG_DETAIL_STRUC>-SCHEDULING_STEP_NUM = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/DD_LOG_DETAIL_STRUC INTO WA_/SAPAPO/DD_LOG_DETAIL_STRUC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/DD_LOG_DETAIL_STRUC-SCHEDULING_START_TIME, sy-vline,
  WA_/SAPAPO/DD_LOG_DETAIL_STRUC-PEGID, sy-vline,
  WA_/SAPAPO/DD_LOG_DETAIL_STRUC-PRIORITY_PERCENTAGE, sy-vline,
  WA_/SAPAPO/DD_LOG_DETAIL_STRUC-DD_FLAG, sy-vline,
  WA_/SAPAPO/DD_LOG_DETAIL_STRUC-PRIORITY_CALCULATION_METHOD, sy-vline,
  WA_/SAPAPO/DD_LOG_DETAIL_STRUC-PROJECTED_ONHAND_STOCK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/DD_LOG_DETAIL_STRUC 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_/SAPAPO/DD_LOG_DETAIL_STRUC 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_/SAPAPO/DD_LOG_DETAIL_STRUC INTO WA_/SAPAPO/DD_LOG_DETAIL_STRUC.


*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 TSTPS, internal->external for field SCHEDULING_START_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DD_LOG_DETAIL_STRUC-SCHEDULING_START_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DD_LOG_DETAIL_STRUC-SCHEDULING_START_TIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field MIN_REQ_DATETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/DD_LOG_DETAIL_STRUC-MIN_REQ_DATETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/DD_LOG_DETAIL_STRUC-MIN_REQ_DATETIME.
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_/SAPAPO/DD_LOG_DETAIL_STRUC_STR, 
LOG_HANDLE TYPE STRING,
HEUR_RUN_COUNT TYPE STRING,
RESID TYPE STRING,
ORDERID TYPE STRING,
SCHEDULING_STEP_NUM TYPE STRING,
SCHEDULING_START_TIME TYPE STRING,
PEGID TYPE STRING,
PRIORITY_PERCENTAGE TYPE STRING,
DD_FLAG TYPE STRING,
PRIORITY_CALCULATION_METHOD TYPE STRING,
PROJECTED_ONHAND_STOCK TYPE STRING,
TOP_OF_RED TYPE STRING,
PEGGED_ORDERID TYPE STRING,
DD_PRIO_ADJUSTMENT_FACTOR TYPE STRING,
MIN_REQ_DATETIME TYPE STRING,
NET_DURATION_OF_ORDER TYPE STRING,
ORD_SELECTED_FOR_SCHEDULE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/DD_LOG_DETAIL_STRUC_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_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-LOG_HANDLE sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-HEUR_RUN_COUNT sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-RESID sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-ORDERID sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-SCHEDULING_STEP_NUM sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-SCHEDULING_START_TIME sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-PEGID sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-PRIORITY_PERCENTAGE sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-DD_FLAG sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-PRIORITY_CALCULATION_METHOD sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-PROJECTED_ONHAND_STOCK sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-TOP_OF_RED sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-PEGGED_ORDERID sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-DD_PRIO_ADJUSTMENT_FACTOR sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-MIN_REQ_DATETIME sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-NET_DURATION_OF_ORDER sy-vline 
WA_/SAPAPO/DD_LOG_DETAIL_STRUC_STR-ORD_SELECTED_FOR_SCHEDULE sy-vline      INTO ld_text SEPARATED BY SPACE.

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