ABAP Select data from SAP table MDC_STEPMTC_CONFIGURATION_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDC_STEPMTC_CONFIGURATION_DATA
*  INTO TABLE @DATA(IT_MDC_STEPMTC_CONFIGURATION_DATA2).
*--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_MDC_STEPMTC_CONFIGURATION_DATA INDEX 1 INTO DATA(WA_MDC_STEPMTC_CONFIGURATION_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDC_STEPMTC_CONFIGURATION_DATA>-FUZZY = 1.
<MDC_STEPMTC_CONFIGURATION_DATA>-KEY = 1.
<MDC_STEPMTC_CONFIGURATION_DATA>-PARENT_KEY = 1.
<MDC_STEPMTC_CONFIGURATION_DATA>-ROOT_KEY = 1.
<MDC_STEPMTC_CONFIGURATION_DATA>-UPPER_THRESHOOLD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDC_STEPMTC_CONFIGURATION_DATA-CONF_ID, sy-vline,
  WA_MDC_STEPMTC_CONFIGURATION_DATA-MTC_ID, sy-vline,
  WA_MDC_STEPMTC_CONFIGURATION_DATA-IM_HANA_ADDRESS, sy-vline,
  WA_MDC_STEPMTC_CONFIGURATION_DATA-KEY, sy-vline,
  WA_MDC_STEPMTC_CONFIGURATION_DATA-PARENT_KEY, sy-vline,
  WA_MDC_STEPMTC_CONFIGURATION_DATA-ROOT_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDC_STEPMTC_CONFIGURATION_DATA 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_MDC_STEPMTC_CONFIGURATION_DATA 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_MDC_STEPMTC_CONFIGURATION_DATA INTO WA_MDC_STEPMTC_CONFIGURATION_DATA.


*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_MDC_STEPMTC_CONFIGURATION_DATA_STR, 
FUZZY TYPE STRING,
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
UPPER_THRESHOOLD TYPE STRING,
CONF_ID TYPE STRING,
MTC_ID TYPE STRING,
IM_HANA_ADDRESS TYPE STRING,
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
THRESHOLD TYPE STRING,
MISSINGSECDATA TYPE STRING,
MISSINGSTRTYPE TYPE STRING,
DIFFSTRTYPES TYPE STRING,
MISSINGDIRCTNL TYPE STRING,
DIFFERENTDIRCTNL TYPE STRING,
TYPEMATCHING TYPE STRING,
ID_MODE TYPE STRING,
ID_COUNTRY TYPE STRING,
CONF_ID TYPE STRING,
IM_HANA_CUST TYPE STRING,
IM_HANA_FIRM TYPE STRING,
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
THRESHOLD TYPE STRING,
FIRMINITIALS TYPE STRING,
SHORTENFIRMNAMES TYPE STRING,
ABBREVIATEDWORDS TYPE STRING,
NUMBERS TYPE STRING,
TYPEMATCHING TYPE STRING,
DOMAIN_CLEANSE TYPE STRING,
CONF_ID TYPE STRING,
IM_HANA_PERSON TYPE STRING,
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
THRESHOLD TYPE STRING,
FIRSTNAMEINITIAL TYPE STRING,
CMPNDFIRSTNAMES TYPE STRING,
FIRSTTOMIDNAMES TYPE STRING,
NAMEVARIATIONS TYPE STRING,
LASTNAMEINITIAL TYPE STRING,
CMPNDLASTNAMES TYPE STRING,
MISSINGPOSTNAME TYPE STRING,
TYPEMATCHING TYPE STRING,
DOMAIN_CLEANSE TYPE STRING,
CONF_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDC_STEPMTC_CONFIGURATION_DATA_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_MDC_STEPMTC_CONFIGURATION_DATA_STR-FUZZY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-PARENT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-ROOT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-UPPER_THRESHOOLD sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-CONF_ID sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-MTC_ID sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-IM_HANA_ADDRESS sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-PARENT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-ROOT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-THRESHOLD sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-MISSINGSECDATA sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-MISSINGSTRTYPE sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-DIFFSTRTYPES sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-MISSINGDIRCTNL sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-DIFFERENTDIRCTNL sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-TYPEMATCHING sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-ID_MODE sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-ID_COUNTRY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-CONF_ID sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-IM_HANA_CUST sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-IM_HANA_FIRM sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-PARENT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-ROOT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-THRESHOLD sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-FIRMINITIALS sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-SHORTENFIRMNAMES sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-ABBREVIATEDWORDS sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-NUMBERS sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-TYPEMATCHING sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-DOMAIN_CLEANSE sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-CONF_ID sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-IM_HANA_PERSON sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-PARENT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-ROOT_KEY sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-THRESHOLD sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-FIRSTNAMEINITIAL sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-CMPNDFIRSTNAMES sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-FIRSTTOMIDNAMES sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-NAMEVARIATIONS sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-LASTNAMEINITIAL sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-CMPNDLASTNAMES sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-MISSINGPOSTNAME sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-TYPEMATCHING sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-DOMAIN_CLEANSE sy-vline 
WA_MDC_STEPMTC_CONFIGURATION_DATA_STR-CONF_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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