ABAP Select data from SAP table LCM_S_DOC_HDR_ATTR 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_DOC_HDR_ATTR 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_DOC_HDR_ATTR. 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_DOC_HDR_ATTR 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_DOC_HDR_ATTR TYPE STANDARD TABLE OF LCM_S_DOC_HDR_ATTR,
      WA_LCM_S_DOC_HDR_ATTR TYPE LCM_S_DOC_HDR_ATTR,
      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_DOC_HDR_ATTR> TYPE LCM_S_DOC_HDR_ATTR.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LCM_S_DOC_HDR_ATTR
*  INTO TABLE @DATA(IT_LCM_S_DOC_HDR_ATTR2).
*--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_DOC_HDR_ATTR INDEX 1 INTO DATA(WA_LCM_S_DOC_HDR_ATTR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LCM_S_DOC_HDR_ATTR>-LEGALTRANSACTION = 1.
<LCM_S_DOC_HDR_ATTR>-LGLCNTNTMDOCCONTENTTYPE = 1.
<LCM_S_DOC_HDR_ATTR>-DOCUMENTDESCRIPTION = 1.
<LCM_S_DOC_HDR_ATTR>-LGLCNTNTMDOCTYPE = 1.
<LCM_S_DOC_HDR_ATTR>-LGLCNTNTMISMANDATORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LCM_S_DOC_HDR_ATTR-LGLCNTNTMPARENTDOCUMENT, sy-vline,
  WA_LCM_S_DOC_HDR_ATTR-LGLCNTNTMLANGUAGE, sy-vline,
  WA_LCM_S_DOC_HDR_ATTR-LGLCNTNTMDOCACCESSLVL, sy-vline,
  WA_LCM_S_DOC_HDR_ATTR-LGLCNTNTMLONGTEXT, sy-vline,
  WA_LCM_S_DOC_HDR_ATTR-LGLCNTNTMDOCREFERENCENUMBER, sy-vline,
  WA_LCM_S_DOC_HDR_ATTR-DUMMY_LCM_DOCUMENT_INCL_EEW_PS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LCM_S_DOC_HDR_ATTR 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_DOC_HDR_ATTR 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_DOC_HDR_ATTR INTO WA_LCM_S_DOC_HDR_ATTR.


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

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

*Conversion exit ISOLA, internal->external for field LGLCNTNTMLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_S_DOC_HDR_ATTR-LGLCNTNTMLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_S_DOC_HDR_ATTR-LGLCNTNTMLANGUAGE.
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_DOC_HDR_ATTR_STR, 
LEGALTRANSACTION TYPE STRING,
LGLCNTNTMDOCCONTENTTYPE TYPE STRING,
DOCUMENTDESCRIPTION TYPE STRING,
LGLCNTNTMDOCTYPE TYPE STRING,
LGLCNTNTMISMANDATORY TYPE STRING,
LGLCNTNTMPARENTDOCUMENT TYPE STRING,
LGLCNTNTMLANGUAGE TYPE STRING,
LGLCNTNTMDOCACCESSLVL TYPE STRING,
LGLCNTNTMLONGTEXT TYPE STRING,
LGLCNTNTMDOCREFERENCENUMBER TYPE STRING,
DUMMY_LCM_DOCUMENT_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LCM_S_DOC_HDR_ATTR_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_DOC_HDR_ATTR_STR-LEGALTRANSACTION sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMDOCCONTENTTYPE sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-DOCUMENTDESCRIPTION sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMDOCTYPE sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMISMANDATORY sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMPARENTDOCUMENT sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMLANGUAGE sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMDOCACCESSLVL sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMLONGTEXT sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-LGLCNTNTMDOCREFERENCENUMBER sy-vline 
WA_LCM_S_DOC_HDR_ATTR_STR-DUMMY_LCM_DOCUMENT_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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