ABAP Select data from SAP table LDAPDEFS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LDAPDEFS
*  INTO TABLE @DATA(IT_LDAPDEFS2).
*--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_LDAPDEFS INDEX 1 INTO DATA(WA_LDAPDEFS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LDAPDEFS>-SERV = 1.
<LDAPDEFS>-SUSR = 1.
<LDAPDEFS>-DN = 1.
<LDAPDEFS>-BASE = 1.
<LDAPDEFS>-NEWR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LDAPDEFS-NEWP, sy-vline,
  WA_LDAPDEFS-ATTR, sy-vline,
  WA_LDAPDEFS-VAL, sy-vline,
  WA_LDAPDEFS-USR, sy-vline,
  WA_LDAPDEFS-PWD, sy-vline,
  WA_LDAPDEFS-HOST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LDAPDEFS 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_LDAPDEFS 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_LDAPDEFS INTO WA_LDAPDEFS.


*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_LDAPDEFS_STR, 
SERV TYPE STRING,
SUSR TYPE STRING,
DN TYPE STRING,
BASE TYPE STRING,
NEWR TYPE STRING,
NEWP TYPE STRING,
ATTR TYPE STRING,
VAL TYPE STRING,
USR TYPE STRING,
PWD TYPE STRING,
HOST TYPE STRING,
PORT TYPE STRING,
FILT TYPE STRING,
NUMB TYPE STRING,
CKEY TYPE STRING,
HOLD TYPE STRING,
SEC TYPE STRING,
USEC TYPE STRING,
MODX TYPE STRING,
SCOP TYPE STRING,
AUTH TYPE STRING,
CRES TYPE STRING,
LDRC TYPE STRING,
WRRE TYPE STRING,
DFAU TYPE STRING,
CHCK TYPE STRING,
FLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LDAPDEFS_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_LDAPDEFS_STR-SERV sy-vline 
WA_LDAPDEFS_STR-SUSR sy-vline 
WA_LDAPDEFS_STR-DN sy-vline 
WA_LDAPDEFS_STR-BASE sy-vline 
WA_LDAPDEFS_STR-NEWR sy-vline 
WA_LDAPDEFS_STR-NEWP sy-vline 
WA_LDAPDEFS_STR-ATTR sy-vline 
WA_LDAPDEFS_STR-VAL sy-vline 
WA_LDAPDEFS_STR-USR sy-vline 
WA_LDAPDEFS_STR-PWD sy-vline 
WA_LDAPDEFS_STR-HOST sy-vline 
WA_LDAPDEFS_STR-PORT sy-vline 
WA_LDAPDEFS_STR-FILT sy-vline 
WA_LDAPDEFS_STR-NUMB sy-vline 
WA_LDAPDEFS_STR-CKEY sy-vline 
WA_LDAPDEFS_STR-HOLD sy-vline 
WA_LDAPDEFS_STR-SEC sy-vline 
WA_LDAPDEFS_STR-USEC sy-vline 
WA_LDAPDEFS_STR-MODX sy-vline 
WA_LDAPDEFS_STR-SCOP sy-vline 
WA_LDAPDEFS_STR-AUTH sy-vline 
WA_LDAPDEFS_STR-CRES sy-vline 
WA_LDAPDEFS_STR-LDRC sy-vline 
WA_LDAPDEFS_STR-WRRE sy-vline 
WA_LDAPDEFS_STR-DFAU sy-vline 
WA_LDAPDEFS_STR-CHCK sy-vline 
WA_LDAPDEFS_STR-FLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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