ABAP Select data from SAP table /SAPAPO/S2L_REQ into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/S2L_REQ 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/S2L_REQ. 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/S2L_REQ 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/S2L_REQ TYPE STANDARD TABLE OF /SAPAPO/S2L_REQ,
      WA_/SAPAPO/S2L_REQ TYPE /SAPAPO/S2L_REQ,
      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/S2L_REQ> TYPE /SAPAPO/S2L_REQ.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPAPO/S2L_REQ.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/S2L_REQ
  INTO TABLE IT_/SAPAPO/S2L_REQ.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/S2L_REQ
*  INTO TABLE @DATA(IT_/SAPAPO/S2L_REQ2).
*--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/S2L_REQ INDEX 1 INTO DATA(WA_/SAPAPO/S2L_REQ2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/S2L_REQ ASSIGNING </SAPAPO/S2L_REQ>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/S2L_REQ>-QRECS_IDX = 1.
</SAPAPO/S2L_REQ>-ORDERID = 1.
</SAPAPO/S2L_REQ>-POSITION_NO = 1.
</SAPAPO/S2L_REQ>-LINE_NO = 1.
</SAPAPO/S2L_REQ>-ATPCAT = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/S2L_REQ INTO WA_/SAPAPO/S2L_REQ.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/S2L_REQ-VERSION, sy-vline,
  WA_/SAPAPO/S2L_REQ-CONTI_SCHEDULING, sy-vline,
  WA_/SAPAPO/S2L_REQ-QUANTITY, sy-vline,
  WA_/SAPAPO/S2L_REQ-REAL_QUANTITY, sy-vline,
  WA_/SAPAPO/S2L_REQ-ORIGINAL_QUANTITY, sy-vline,
  WA_/SAPAPO/S2L_REQ-CONF_QUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/S2L_REQ 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/S2L_REQ 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/S2L_REQ INTO WA_/SAPAPO/S2L_REQ.


*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/S2L_REQ_STR, 
QRECS_IDX TYPE STRING,
ORDERID TYPE STRING,
POSITION_NO TYPE STRING,
LINE_NO TYPE STRING,
ATPCAT TYPE STRING,
VERSION TYPE STRING,
CONTI_SCHEDULING TYPE STRING,
QUANTITY TYPE STRING,
REAL_QUANTITY TYPE STRING,
ORIGINAL_QUANTITY TYPE STRING,
CONF_QUANTITY TYPE STRING,
IO_TIME TYPE STRING,
IO_END_TIME TYPE STRING,
IO_TIME_REM TYPE STRING,
PART_OF_REAL TYPE STRING,
PART_OF_CONF TYPE STRING,
CONFID TYPE STRING,
GMSYNC TYPE STRING,
SEQNO TYPE STRING,
PROC_STATE TYPE STRING,
I_P_VERSION_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/S2L_REQ_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/S2L_REQ_STR-QRECS_IDX sy-vline 
WA_/SAPAPO/S2L_REQ_STR-ORDERID sy-vline 
WA_/SAPAPO/S2L_REQ_STR-POSITION_NO sy-vline 
WA_/SAPAPO/S2L_REQ_STR-LINE_NO sy-vline 
WA_/SAPAPO/S2L_REQ_STR-ATPCAT sy-vline 
WA_/SAPAPO/S2L_REQ_STR-VERSION sy-vline 
WA_/SAPAPO/S2L_REQ_STR-CONTI_SCHEDULING sy-vline 
WA_/SAPAPO/S2L_REQ_STR-QUANTITY sy-vline 
WA_/SAPAPO/S2L_REQ_STR-REAL_QUANTITY sy-vline 
WA_/SAPAPO/S2L_REQ_STR-ORIGINAL_QUANTITY sy-vline 
WA_/SAPAPO/S2L_REQ_STR-CONF_QUANTITY sy-vline 
WA_/SAPAPO/S2L_REQ_STR-IO_TIME sy-vline 
WA_/SAPAPO/S2L_REQ_STR-IO_END_TIME sy-vline 
WA_/SAPAPO/S2L_REQ_STR-IO_TIME_REM sy-vline 
WA_/SAPAPO/S2L_REQ_STR-PART_OF_REAL sy-vline 
WA_/SAPAPO/S2L_REQ_STR-PART_OF_CONF sy-vline 
WA_/SAPAPO/S2L_REQ_STR-CONFID sy-vline 
WA_/SAPAPO/S2L_REQ_STR-GMSYNC sy-vline 
WA_/SAPAPO/S2L_REQ_STR-SEQNO sy-vline 
WA_/SAPAPO/S2L_REQ_STR-PROC_STATE sy-vline 
WA_/SAPAPO/S2L_REQ_STR-I_P_VERSION_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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