ABAP Select data from SAP table LDLPNT into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LDLPNT 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 LDLPNT. 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 LDLPNT 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_LDLPNT TYPE STANDARD TABLE OF LDLPNT,
      WA_LDLPNT TYPE LDLPNT,
      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: <LDLPNT> TYPE LDLPNT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LDLPNT
*  INTO TABLE @DATA(IT_LDLPNT2).
*--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_LDLPNT INDEX 1 INTO DATA(WA_LDLPNT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LDLPNT>-LINE_TYPE = 1.
<LDLPNT>-LN_SEQ = 1.
<LDLPNT>-LNSID = 1.
<LDLPNT>-LNSID_UP = 1.
<LDLPNT>-NODE_KEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LDLPNT-LINE_SEG, sy-vline,
  WA_LDLPNT-LNSID_TXT, sy-vline,
  WA_LDLPNT-PLNTY, sy-vline,
  WA_LDLPNT-PLNNR, sy-vline,
  WA_LDLPNT-PLNKN, sy-vline,
  WA_LDLPNT-PLNAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LDLPNT 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_LDLPNT 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_LDLPNT INTO WA_LDLPNT.


*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.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LDLPNT-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LDLPNT-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LDLPNT-PLNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LDLPNT-PLNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNFL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LDLPNT-PLNFL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LDLPNT-PLNFL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EX_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LDLPNT-EX_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LDLPNT-EX_UNIT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LDLPNT_STR, 
LINE_TYPE TYPE STRING,
LN_SEQ TYPE STRING,
LNSID TYPE STRING,
LNSID_UP TYPE STRING,
NODE_KEY TYPE STRING,
LINE_SEG TYPE STRING,
LNSID_TXT TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNKN TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
TAKT TYPE STRING,
EX_TIME TYPE STRING,
EX_UNIT TYPE STRING,
NVADD TYPE STRING,
AZNOR TYPE STRING,
TAKTSD TYPE STRING,
TAKTS TYPE STRING,
LTAKT TYPE STRING,
TKTSP TYPE STRING,
BUFFER TYPE STRING,
FEEDER_LINE TYPE STRING,
LTYPE TYPE STRING,
LTYPE_TXT TYPE STRING,
NO_EXPAND TYPE STRING,
TERMKAP TYPE STRING,
NODE_KEY_EXPAND TYPE STRING,
LN_LEVEL TYPE STRING,
TAKT_SUM TYPE STRING,
FILTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LDLPNT_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_LDLPNT_STR-LINE_TYPE sy-vline 
WA_LDLPNT_STR-LN_SEQ sy-vline 
WA_LDLPNT_STR-LNSID sy-vline 
WA_LDLPNT_STR-LNSID_UP sy-vline 
WA_LDLPNT_STR-NODE_KEY sy-vline 
WA_LDLPNT_STR-LINE_SEG sy-vline 
WA_LDLPNT_STR-LNSID_TXT sy-vline 
WA_LDLPNT_STR-PLNTY sy-vline 
WA_LDLPNT_STR-PLNNR sy-vline 
WA_LDLPNT_STR-PLNKN sy-vline 
WA_LDLPNT_STR-PLNAL sy-vline 
WA_LDLPNT_STR-PLNFL sy-vline 
WA_LDLPNT_STR-TAKT sy-vline 
WA_LDLPNT_STR-EX_TIME sy-vline 
WA_LDLPNT_STR-EX_UNIT sy-vline 
WA_LDLPNT_STR-NVADD sy-vline 
WA_LDLPNT_STR-AZNOR sy-vline 
WA_LDLPNT_STR-TAKTSD sy-vline 
WA_LDLPNT_STR-TAKTS sy-vline 
WA_LDLPNT_STR-LTAKT sy-vline 
WA_LDLPNT_STR-TKTSP sy-vline 
WA_LDLPNT_STR-BUFFER sy-vline 
WA_LDLPNT_STR-FEEDER_LINE sy-vline 
WA_LDLPNT_STR-LTYPE sy-vline 
WA_LDLPNT_STR-LTYPE_TXT sy-vline 
WA_LDLPNT_STR-NO_EXPAND sy-vline 
WA_LDLPNT_STR-TERMKAP sy-vline 
WA_LDLPNT_STR-NODE_KEY_EXPAND sy-vline 
WA_LDLPNT_STR-LN_LEVEL sy-vline 
WA_LDLPNT_STR-TAKT_SUM sy-vline 
WA_LDLPNT_STR-FILTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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