ABAP Select data from SAP table LAW3_S_UC_DISPLAY_COL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LAW3_S_UC_DISPLAY_COL 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 LAW3_S_UC_DISPLAY_COL. 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 LAW3_S_UC_DISPLAY_COL 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_LAW3_S_UC_DISPLAY_COL TYPE STANDARD TABLE OF LAW3_S_UC_DISPLAY_COL,
      WA_LAW3_S_UC_DISPLAY_COL TYPE LAW3_S_UC_DISPLAY_COL,
      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: <LAW3_S_UC_DISPLAY_COL> TYPE LAW3_S_UC_DISPLAY_COL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LAW3_S_UC_DISPLAY_COL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LAW3_S_UC_DISPLAY_COL
  INTO TABLE IT_LAW3_S_UC_DISPLAY_COL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LAW3_S_UC_DISPLAY_COL
*  INTO TABLE @DATA(IT_LAW3_S_UC_DISPLAY_COL2).
*--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_LAW3_S_UC_DISPLAY_COL INDEX 1 INTO DATA(WA_LAW3_S_UC_DISPLAY_COL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LAW3_S_UC_DISPLAY_COL ASSIGNING <LAW3_S_UC_DISPLAY_COL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LAW3_S_UC_DISPLAY_COL>-COLUMN = 1.
<LAW3_S_UC_DISPLAY_COL>-TEXT = 1.
<LAW3_S_UC_DISPLAY_COL>-HIDE = 1.
<LAW3_S_UC_DISPLAY_COL>-KEY = 1.
<LAW3_S_UC_DISPLAY_COL>-HOTSPOT = 1.

ENDLOOP.

LOOP AT IT_LAW3_S_UC_DISPLAY_COL INTO WA_LAW3_S_UC_DISPLAY_COL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LAW3_S_UC_DISPLAY_COL-ALIGN, sy-vline,
  WA_LAW3_S_UC_DISPLAY_COL-OUTLEN, sy-vline,
  WA_LAW3_S_UC_DISPLAY_COL-LIGHT, sy-vline,
  WA_LAW3_S_UC_DISPLAY_COL-ICON, sy-vline,
  WA_LAW3_S_UC_DISPLAY_COL-DROPDOWN, sy-vline,
  WA_LAW3_S_UC_DISPLAY_COL-POSITION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LAW3_S_UC_DISPLAY_COL 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_LAW3_S_UC_DISPLAY_COL 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_LAW3_S_UC_DISPLAY_COL INTO WA_LAW3_S_UC_DISPLAY_COL.


*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_LAW3_S_UC_DISPLAY_COL_STR, 
COLUMN TYPE STRING,
TEXT TYPE STRING,
HIDE TYPE STRING,
KEY TYPE STRING,
HOTSPOT TYPE STRING,
ALIGN TYPE STRING,
OUTLEN TYPE STRING,
LIGHT TYPE STRING,
ICON TYPE STRING,
DROPDOWN TYPE STRING,
POSITION TYPE STRING,
TEXT_LENGHT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LAW3_S_UC_DISPLAY_COL_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_LAW3_S_UC_DISPLAY_COL_STR-COLUMN sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-TEXT sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-HIDE sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-KEY sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-HOTSPOT sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-ALIGN sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-OUTLEN sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-LIGHT sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-ICON sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-DROPDOWN sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-POSITION sy-vline 
WA_LAW3_S_UC_DISPLAY_COL_STR-TEXT_LENGHT sy-vline      INTO ld_text SEPARATED BY SPACE.

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