ABAP Select data from SAP table LDA01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LDA01 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 LDA01. 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 LDA01 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_LDA01 TYPE STANDARD TABLE OF LDA01,
      WA_LDA01 TYPE LDA01,
      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: <LDA01> TYPE LDA01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LDA01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LDA01
  INTO TABLE IT_LDA01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LDA01
*  INTO TABLE @DATA(IT_LDA012).
*--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_LDA01 INDEX 1 INTO DATA(WA_LDA012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LDA01 ASSIGNING <LDA01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LDA01>-MANDT = 1.
<LDA01>-LGNUM = 1.
<LDA01>-TBNUM = 1.
<LDA01>-TBPOS = 1.
<LDA01>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_LDA01 INTO WA_LDA01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LDA01-LIFNR, sy-vline,
  WA_LDA01-LIFHP, sy-vline,
  WA_LDA01-LIFUP, sy-vline,
  WA_LDA01-KOMNR, sy-vline,
  WA_LDA01-VSENR, sy-vline,
  WA_LDA01-TOURN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LDA01 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_LDA01 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_LDA01 INTO WA_LDA01.


*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 LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LDA01-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LDA01-LIFNR.
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_LDA01_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
TBNUM TYPE STRING,
TBPOS TYPE STRING,
BUKRS TYPE STRING,
LIFNR TYPE STRING,
LIFHP TYPE STRING,
LIFUP TYPE STRING,
KOMNR TYPE STRING,
VSENR TYPE STRING,
TOURN TYPE STRING,
VSART TYPE STRING,
KNDNR TYPE STRING,
KDLIF TYPE STRING,
BNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LDA01_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_LDA01_STR-MANDT sy-vline 
WA_LDA01_STR-LGNUM sy-vline 
WA_LDA01_STR-TBNUM sy-vline 
WA_LDA01_STR-TBPOS sy-vline 
WA_LDA01_STR-BUKRS sy-vline 
WA_LDA01_STR-LIFNR sy-vline 
WA_LDA01_STR-LIFHP sy-vline 
WA_LDA01_STR-LIFUP sy-vline 
WA_LDA01_STR-KOMNR sy-vline 
WA_LDA01_STR-VSENR sy-vline 
WA_LDA01_STR-TOURN sy-vline 
WA_LDA01_STR-VSART sy-vline 
WA_LDA01_STR-KNDNR sy-vline 
WA_LDA01_STR-KDLIF sy-vline 
WA_LDA01_STR-BNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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