ABAP Select data from SAP table LDAPMAP123 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LDAPMAP123 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 LDAPMAP123. 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 LDAPMAP123 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_LDAPMAP123 TYPE STANDARD TABLE OF LDAPMAP123,
      WA_LDAPMAP123 TYPE LDAPMAP123,
      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: <LDAPMAP123> TYPE LDAPMAP123.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LDAPMAP123.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LDAPMAP123
  INTO TABLE IT_LDAPMAP123.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LDAPMAP123
*  INTO TABLE @DATA(IT_LDAPMAP1232).
*--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_LDAPMAP123 INDEX 1 INTO DATA(WA_LDAPMAP1232).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LDAPMAP123 ASSIGNING <LDAPMAP123>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LDAPMAP123>-SERVERID = 1.
<LDAPMAP123>-MAPKEY = 1.
<LDAPMAP123>-NR = 1.
<LDAPMAP123>-VAR = 1.
<LDAPMAP123>-FLD = 1.

ENDLOOP.

LOOP AT IT_LDAPMAP123 INTO WA_LDAPMAP123.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LDAPMAP123-ATTR, sy-vline,
  WA_LDAPMAP123-FFLAG, sy-vline,
  WA_LDAPMAP123-IFLAG, sy-vline,
  WA_LDAPMAP123-OFLAG, sy-vline,
  WA_LDAPMAP123-MFLAG, sy-vline,
  WA_LDAPMAP123-RFLAG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LDAPMAP123 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_LDAPMAP123 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_LDAPMAP123 INTO WA_LDAPMAP123.


*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_LDAPMAP123_STR, 
SERVERID TYPE STRING,
MAPKEY TYPE STRING,
NR TYPE STRING,
VAR TYPE STRING,
FLD TYPE STRING,
ATTR TYPE STRING,
FFLAG TYPE STRING,
IFLAG TYPE STRING,
OFLAG TYPE STRING,
MFLAG TYPE STRING,
RFLAG TYPE STRING,
SFLAG TYPE STRING,
SYNCIN TYPE STRING,
SYNCOUT TYPE STRING,
ICON TYPE STRING,
DB_OBL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LDAPMAP123_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_LDAPMAP123_STR-SERVERID sy-vline 
WA_LDAPMAP123_STR-MAPKEY sy-vline 
WA_LDAPMAP123_STR-NR sy-vline 
WA_LDAPMAP123_STR-VAR sy-vline 
WA_LDAPMAP123_STR-FLD sy-vline 
WA_LDAPMAP123_STR-ATTR sy-vline 
WA_LDAPMAP123_STR-FFLAG sy-vline 
WA_LDAPMAP123_STR-IFLAG sy-vline 
WA_LDAPMAP123_STR-OFLAG sy-vline 
WA_LDAPMAP123_STR-MFLAG sy-vline 
WA_LDAPMAP123_STR-RFLAG sy-vline 
WA_LDAPMAP123_STR-SFLAG sy-vline 
WA_LDAPMAP123_STR-SYNCIN sy-vline 
WA_LDAPMAP123_STR-SYNCOUT sy-vline 
WA_LDAPMAP123_STR-ICON sy-vline 
WA_LDAPMAP123_STR-DB_OBL sy-vline      INTO ld_text SEPARATED BY SPACE.

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