ABAP Select data from SAP table SMT_SET_PARAMETER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SMT_SET_PARAMETER
*  INTO TABLE @DATA(IT_SMT_SET_PARAMETER2).
*--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_SMT_SET_PARAMETER INDEX 1 INTO DATA(WA_SMT_SET_PARAMETER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SMT_SET_PARAMETER>-SOURCE = 1.
<SMT_SET_PARAMETER>-PREDECESSOR1 = 1.
<SMT_SET_PARAMETER>-PREDECESSOR2 = 1.
<SMT_SET_PARAMETER>-PREDECESSOR3 = 1.
<SMT_SET_PARAMETER>-PREDECESSOR4 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SMT_SET_PARAMETER-ADD1, sy-vline,
  WA_SMT_SET_PARAMETER-ADD2, sy-vline,
  WA_SMT_SET_PARAMETER-ADD3, sy-vline,
  WA_SMT_SET_PARAMETER-ADD4, sy-vline,
  WA_SMT_SET_PARAMETER-ADD5, sy-vline,
  WA_SMT_SET_PARAMETER-ADD6, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SMT_SET_PARAMETER 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_SMT_SET_PARAMETER 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_SMT_SET_PARAMETER INTO WA_SMT_SET_PARAMETER.


*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_SMT_SET_PARAMETER_STR, 
SOURCE TYPE STRING,
PREDECESSOR1 TYPE STRING,
PREDECESSOR2 TYPE STRING,
PREDECESSOR3 TYPE STRING,
PREDECESSOR4 TYPE STRING,
ADD1 TYPE STRING,
ADD2 TYPE STRING,
ADD3 TYPE STRING,
ADD4 TYPE STRING,
ADD5 TYPE STRING,
ADD6 TYPE STRING,
ADD7 TYPE STRING,
ADD8 TYPE STRING,
ADD9 TYPE STRING,
ADD10 TYPE STRING,
ADD11 TYPE STRING,
ADD12 TYPE STRING,
ADD13 TYPE STRING,
ADD14 TYPE STRING,
ADD15 TYPE STRING,
ADD16 TYPE STRING,
ADD17 TYPE STRING,
ADD18 TYPE STRING,
ADD19 TYPE STRING,
ADD20 TYPE STRING,
CHANGE TYPE STRING,
CHANGE_WORK TYPE STRING,
TARGET TYPE STRING,
TARGET_WORK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SMT_SET_PARAMETER_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_SMT_SET_PARAMETER_STR-SOURCE sy-vline 
WA_SMT_SET_PARAMETER_STR-PREDECESSOR1 sy-vline 
WA_SMT_SET_PARAMETER_STR-PREDECESSOR2 sy-vline 
WA_SMT_SET_PARAMETER_STR-PREDECESSOR3 sy-vline 
WA_SMT_SET_PARAMETER_STR-PREDECESSOR4 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD1 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD2 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD3 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD4 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD5 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD6 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD7 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD8 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD9 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD10 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD11 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD12 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD13 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD14 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD15 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD16 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD17 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD18 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD19 sy-vline 
WA_SMT_SET_PARAMETER_STR-ADD20 sy-vline 
WA_SMT_SET_PARAMETER_STR-CHANGE sy-vline 
WA_SMT_SET_PARAMETER_STR-CHANGE_WORK sy-vline 
WA_SMT_SET_PARAMETER_STR-TARGET sy-vline 
WA_SMT_SET_PARAMETER_STR-TARGET_WORK sy-vline      INTO ld_text SEPARATED BY SPACE.

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