ABAP Select data from SAP table LCM_S_AIF_LD_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LCM_S_AIF_LD_HEADER
*  INTO TABLE @DATA(IT_LCM_S_AIF_LD_HEADER2).
*--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_LCM_S_AIF_LD_HEADER INDEX 1 INTO DATA(WA_LCM_S_AIF_LD_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LCM_S_AIF_LD_HEADER>-LGLCNTNTMDOCUMENTUUID = 1.
<LCM_S_AIF_LD_HEADER>-LGLCNTNTMDOCUMENT = 1.
<LCM_S_AIF_LD_HEADER>-LGLCNTNTMDOCUMENTLINKEDOBJECT = 1.
<LCM_S_AIF_LD_HEADER>-LGLCNTNTMDOCUMENTLINKEDOBJKEY = 1.
<LCM_S_AIF_LD_HEADER>-LGLCNTNTMDOCUMENTISTOPVERSION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LCM_S_AIF_LD_HEADER-LEGALTRANSACTION, sy-vline,
  WA_LCM_S_AIF_LD_HEADER-LEGALTRANSACTIONUUID, sy-vline,
  WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMDOCCONTENTTYPE, sy-vline,
  WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMLANGUAGE, sy-vline,
  WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMPARENTDOCUMENT, sy-vline,
  WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMDOCACCESSLVL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LCM_S_AIF_LD_HEADER 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_LCM_S_AIF_LD_HEADER 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_LCM_S_AIF_LD_HEADER INTO WA_LCM_S_AIF_LD_HEADER.


*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 LGLCNTNTMDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMDOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LGLCNTNTMLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMLANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LGLCNTNTMPARENTDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMPARENTDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_S_AIF_LD_HEADER-LGLCNTNTMPARENTDOCUMENT.
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_LCM_S_AIF_LD_HEADER_STR, 
LGLCNTNTMDOCUMENTUUID TYPE STRING,
LGLCNTNTMDOCUMENT TYPE STRING,
LGLCNTNTMDOCUMENTLINKEDOBJECT TYPE STRING,
LGLCNTNTMDOCUMENTLINKEDOBJKEY TYPE STRING,
LGLCNTNTMDOCUMENTISTOPVERSION TYPE STRING,
LEGALTRANSACTION TYPE STRING,
LEGALTRANSACTIONUUID TYPE STRING,
LGLCNTNTMDOCCONTENTTYPE TYPE STRING,
LGLCNTNTMLANGUAGE TYPE STRING,
LGLCNTNTMPARENTDOCUMENT TYPE STRING,
LGLCNTNTMDOCACCESSLVL TYPE STRING,
LGLCNTNTMCHANGEDBYUSER TYPE STRING,
LGLCNTNTMCHANGEDUTCDATETIME TYPE STRING,
LGLCNTNTMCREATEDBYUSER TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
DOCUMENTDESCRIPTION TYPE STRING,
LGLCNTNTMPROFILE TYPE STRING,
INTERNALDOCUMENTSTATUS TYPE STRING,
LGLCNTNTMDOCTYPE TYPE STRING,
LGLCNTNTMVIRTUALDOCVERSKEY TYPE STRING,
LGLCNTNTMVIRTUALDOCSYNCSTS TYPE STRING,
LGLCNTNTMCNTXTDOCUUID TYPE STRING,
LEGALDOCUMENTSOURCE TYPE STRING,
LGLCNTNTMDOCLOWTOUCHLEVEL TYPE STRING,
LGLCNTNTMTMPLID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LCM_S_AIF_LD_HEADER_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_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCUMENTUUID sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCUMENT sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCUMENTLINKEDOBJECT sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCUMENTLINKEDOBJKEY sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCUMENTISTOPVERSION sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LEGALTRANSACTION sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LEGALTRANSACTIONUUID sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCCONTENTTYPE sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMLANGUAGE sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMPARENTDOCUMENT sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCACCESSLVL sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMCHANGEDBYUSER sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMCHANGEDUTCDATETIME sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMCREATEDBYUSER sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-DOCUMENTDESCRIPTION sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMPROFILE sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-INTERNALDOCUMENTSTATUS sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCTYPE sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMVIRTUALDOCVERSKEY sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMVIRTUALDOCSYNCSTS sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMCNTXTDOCUUID sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LEGALDOCUMENTSOURCE sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMDOCLOWTOUCHLEVEL sy-vline 
WA_LCM_S_AIF_LD_HEADER_STR-LGLCNTNTMTMPLID sy-vline      INTO ld_text SEPARATED BY SPACE.

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