ABAP Select data from SAP table /SAPAPO/CTM_TSTR_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_TSTR_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_TSTR_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_TSTR_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_TSTR_IO TYPE STANDARD TABLE OF /SAPAPO/CTM_TSTR_IO,
      WA_/SAPAPO/CTM_TSTR_IO TYPE /SAPAPO/CTM_TSTR_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_TSTR_IO> TYPE /SAPAPO/CTM_TSTR_IO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/CTM_TSTR_IO
*  INTO TABLE @DATA(IT_/SAPAPO/CTM_TSTR_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_TSTR_IO INDEX 1 INTO DATA(WA_/SAPAPO/CTM_TSTR_IO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/CTM_TSTR_IO>-TSTRID = 1.
</SAPAPO/CTM_TSTR_IO>-TEXT40 = 1.
</SAPAPO/CTM_TSTR_IO>-START_FIX = 1.
</SAPAPO/CTM_TSTR_IO>-START_REL = 1.
</SAPAPO/CTM_TSTR_IO>-START_DAYFLG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/CTM_TSTR_IO-START_DAY, sy-vline,
  WA_/SAPAPO/CTM_TSTR_IO-START_DAY_TXT, sy-vline,
  WA_/SAPAPO/CTM_TSTR_IO-START_RELDAY, sy-vline,
  WA_/SAPAPO/CTM_TSTR_IO-STARTRELDATE, sy-vline,
  WA_/SAPAPO/CTM_TSTR_IO-STARTFIXDATE, sy-vline,
  WA_/SAPAPO/CTM_TSTR_IO-STARTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/CTM_TSTR_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_TSTR_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_TSTR_IO INTO WA_/SAPAPO/CTM_TSTR_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.
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_TSTR_IO_STR, 
TSTRID TYPE STRING,
TEXT40 TYPE STRING,
START_FIX TYPE STRING,
START_REL TYPE STRING,
START_DAYFLG TYPE STRING,
START_DAY TYPE STRING,
START_DAY_TXT TYPE STRING,
START_RELDAY TYPE STRING,
STARTRELDATE TYPE STRING,
STARTFIXDATE TYPE STRING,
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
STARTTST TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
ENDTST TYPE STRING,
PERIODTYPE1 TYPE STRING,
PERIODTYPE1T TYPE STRING,
PERIODS1 TYPE STRING,
PERIODTYPE2 TYPE STRING,
PERIODTYPE2T TYPE STRING,
PERIODS2 TYPE STRING,
PERIODTYPE3 TYPE STRING,
PERIODTYPE3T TYPE STRING,
PERIODS3 TYPE STRING,
PERIODTYPE4 TYPE STRING,
PERIODS4 TYPE STRING,
PERIODTYPE4T TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/CTM_TSTR_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_TSTR_IO_STR-TSTRID sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-TEXT40 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-START_FIX sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-START_REL sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-START_DAYFLG sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-START_DAY sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-START_DAY_TXT sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-START_RELDAY sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-STARTRELDATE sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-STARTFIXDATE sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-STARTDATE sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-STARTTIME sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-STARTTST sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-ENDDATE sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-ENDTIME sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-ENDTST sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE1 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE1T sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODS1 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE2 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE2T sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODS2 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE3 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE3T sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODS3 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE4 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODS4 sy-vline 
WA_/SAPAPO/CTM_TSTR_IO_STR-PERIODTYPE4T sy-vline      INTO ld_text SEPARATED BY SPACE.

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