ABAP Select data from SAP table UPC_STEPS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UPC_STEPS
*  INTO TABLE @DATA(IT_UPC_STEPS2).
*--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_UPC_STEPS INDEX 1 INTO DATA(WA_UPC_STEPS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UPC_STEPS>-MANDT = 1.
<UPC_STEPS>-AREA = 1.
<UPC_STEPS>-STEP = 1.
<UPC_STEPS>-MTYPE = 1.
<UPC_STEPS>-DERIVE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UPC_STEPS-HIENM, sy-vline,
  WA_UPC_STEPS-HIEVER, sy-vline,
  WA_UPC_STEPS-DATETO, sy-vline,
  WA_UPC_STEPS-CHANM, sy-vline,
  WA_UPC_STEPS-REFID, sy-vline,
  WA_UPC_STEPS-FBDER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UPC_STEPS 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_UPC_STEPS 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_UPC_STEPS INTO WA_UPC_STEPS.


*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_UPC_STEPS_STR, 
MANDT TYPE STRING,
AREA TYPE STRING,
STEP TYPE STRING,
MTYPE TYPE STRING,
DERIVE TYPE STRING,
HIENM TYPE STRING,
HIEVER TYPE STRING,
DATETO TYPE STRING,
CHANM TYPE STRING,
REFID TYPE STRING,
FBDER TYPE STRING,
FBCOM TYPE STRING,
FBVER TYPE STRING,
COUNTER TYPE STRING,
UNAME TYPE STRING,
AEDTM TYPE STRING,
ATIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UPC_STEPS_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_UPC_STEPS_STR-MANDT sy-vline 
WA_UPC_STEPS_STR-AREA sy-vline 
WA_UPC_STEPS_STR-STEP sy-vline 
WA_UPC_STEPS_STR-MTYPE sy-vline 
WA_UPC_STEPS_STR-DERIVE sy-vline 
WA_UPC_STEPS_STR-HIENM sy-vline 
WA_UPC_STEPS_STR-HIEVER sy-vline 
WA_UPC_STEPS_STR-DATETO sy-vline 
WA_UPC_STEPS_STR-CHANM sy-vline 
WA_UPC_STEPS_STR-REFID sy-vline 
WA_UPC_STEPS_STR-FBDER sy-vline 
WA_UPC_STEPS_STR-FBCOM sy-vline 
WA_UPC_STEPS_STR-FBVER sy-vline 
WA_UPC_STEPS_STR-COUNTER sy-vline 
WA_UPC_STEPS_STR-UNAME sy-vline 
WA_UPC_STEPS_STR-AEDTM sy-vline 
WA_UPC_STEPS_STR-ATIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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