ABAP Select data from SAP table MDC_S_PROC_CONFIG_PERS_NODE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDC_S_PROC_CONFIG_PERS_NODE 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_S_PROC_CONFIG_PERS_NODE. 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_S_PROC_CONFIG_PERS_NODE 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_S_PROC_CONFIG_PERS_NODE TYPE STANDARD TABLE OF MDC_S_PROC_CONFIG_PERS_NODE,
      WA_MDC_S_PROC_CONFIG_PERS_NODE TYPE MDC_S_PROC_CONFIG_PERS_NODE,
      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_S_PROC_CONFIG_PERS_NODE> TYPE MDC_S_PROC_CONFIG_PERS_NODE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDC_S_PROC_CONFIG_PERS_NODE
*  INTO TABLE @DATA(IT_MDC_S_PROC_CONFIG_PERS_NODE2).
*--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_S_PROC_CONFIG_PERS_NODE INDEX 1 INTO DATA(WA_MDC_S_PROC_CONFIG_PERS_NODE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDC_S_PROC_CONFIG_PERS_NODE>-KEY = 1.
<MDC_S_PROC_CONFIG_PERS_NODE>-PARENT_KEY = 1.
<MDC_S_PROC_CONFIG_PERS_NODE>-ROOT_KEY = 1.
<MDC_S_PROC_CONFIG_PERS_NODE>-THRESHOLD = 1.
<MDC_S_PROC_CONFIG_PERS_NODE>-FIRSTNAMEINITIAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDC_S_PROC_CONFIG_PERS_NODE-CMPNDFIRSTNAMES, sy-vline,
  WA_MDC_S_PROC_CONFIG_PERS_NODE-FIRSTTOMIDNAMES, sy-vline,
  WA_MDC_S_PROC_CONFIG_PERS_NODE-NAMEVARIATIONS, sy-vline,
  WA_MDC_S_PROC_CONFIG_PERS_NODE-LASTNAMEINITIAL, sy-vline,
  WA_MDC_S_PROC_CONFIG_PERS_NODE-CMPNDLASTNAMES, sy-vline,
  WA_MDC_S_PROC_CONFIG_PERS_NODE-MISSINGPOSTNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDC_S_PROC_CONFIG_PERS_NODE 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_S_PROC_CONFIG_PERS_NODE 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_S_PROC_CONFIG_PERS_NODE INTO WA_MDC_S_PROC_CONFIG_PERS_NODE.


*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_S_PROC_CONFIG_PERS_NODE_STR, 
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,END OF T_EKKO_STR.
DATA: WA_MDC_S_PROC_CONFIG_PERS_NODE_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_S_PROC_CONFIG_PERS_NODE_STR-KEY sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-PARENT_KEY sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-ROOT_KEY sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-THRESHOLD sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-FIRSTNAMEINITIAL sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-CMPNDFIRSTNAMES sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-FIRSTTOMIDNAMES sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-NAMEVARIATIONS sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-LASTNAMEINITIAL sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-CMPNDLASTNAMES sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-MISSINGPOSTNAME sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-TYPEMATCHING sy-vline 
WA_MDC_S_PROC_CONFIG_PERS_NODE_STR-DOMAIN_CLEANSE sy-vline      INTO ld_text SEPARATED BY SPACE.

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