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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/CTM_PPM_ACTREL_IO
*  INTO TABLE @DATA(IT_/SAPAPO/CTM_PPM_ACTREL_IO2).
*--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/CTM_PPM_ACTREL_IO INDEX 1 INTO DATA(WA_/SAPAPO/CTM_PPM_ACTREL_IO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/CTM_PPM_ACTREL_IO>-PREDID = 1.
</SAPAPO/CTM_PPM_ACTREL_IO>-SUCCID = 1.
</SAPAPO/CTM_PPM_ACTREL_IO>-CRTYPE = 1.
</SAPAPO/CTM_PPM_ACTREL_IO>-MINSHIFT = 1.
</SAPAPO/CTM_PPM_ACTREL_IO>-MAXSHIFT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/CTM_PPM_ACTREL_IO-FMIN, sy-vline,
  WA_/SAPAPO/CTM_PPM_ACTREL_IO-FMAX, sy-vline,
  WA_/SAPAPO/CTM_PPM_ACTREL_IO-FRNF, sy-vline,
  WA_/SAPAPO/CTM_PPM_ACTREL_IO-UNIT, sy-vline,
  WA_/SAPAPO/CTM_PPM_ACTREL_IO-MATFLOW, sy-vline,
  WA_/SAPAPO/CTM_PPM_ACTREL_IO-PREDNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/CTM_PPM_ACTREL_IO 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/CTM_PPM_ACTREL_IO 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/CTM_PPM_ACTREL_IO INTO WA_/SAPAPO/CTM_PPM_ACTREL_IO.


*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 CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/CTM_PPM_ACTREL_IO-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/CTM_PPM_ACTREL_IO-UNIT.
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/CTM_PPM_ACTREL_IO_STR, 
PREDID TYPE STRING,
SUCCID TYPE STRING,
CRTYPE TYPE STRING,
MINSHIFT TYPE STRING,
MAXSHIFT TYPE STRING,
FMIN TYPE STRING,
FMAX TYPE STRING,
FRNF TYPE STRING,
UNIT TYPE STRING,
MATFLOW TYPE STRING,
PREDNAME TYPE STRING,
SUCCNAME TYPE STRING,
PREDVORNR TYPE STRING,
SUCCVORNR TYPE STRING,
MSGKEY TYPE STRING,
MSGTY TYPE STRING,
AGGOBJ TYPE STRING,
OBJID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/CTM_PPM_ACTREL_IO_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/CTM_PPM_ACTREL_IO_STR-PREDID sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-SUCCID sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-CRTYPE sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-MINSHIFT sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-MAXSHIFT sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-FMIN sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-FMAX sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-FRNF sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-UNIT sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-MATFLOW sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-PREDNAME sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-SUCCNAME sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-PREDVORNR sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-SUCCVORNR sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-MSGKEY sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-MSGTY sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-AGGOBJ sy-vline 
WA_/SAPAPO/CTM_PPM_ACTREL_IO_STR-OBJID sy-vline      INTO ld_text SEPARATED BY SPACE.

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