ABAP Select data from SAP table LCM_S_CTX_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_CTX_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_CTX_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_CTX_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_CTX_HEADER TYPE STANDARD TABLE OF LCM_S_CTX_HEADER,
      WA_LCM_S_CTX_HEADER TYPE LCM_S_CTX_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_CTX_HEADER> TYPE LCM_S_CTX_HEADER.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LCM_S_CTX_HEADER
*  INTO TABLE @DATA(IT_LCM_S_CTX_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_CTX_HEADER INDEX 1 INTO DATA(WA_LCM_S_CTX_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LCM_S_CTX_HEADER>-LGLCNTNTMCONTEXTUUID = 1.
<LCM_S_CTX_HEADER>-LGLCNTNTMCONTEXT = 1.
<LCM_S_CTX_HEADER>-LGLCNTNTMCONTEXTVERSION = 1.
<LCM_S_CTX_HEADER>-LGLCNTNTMCONTEXTSTATUS = 1.
<LCM_S_CTX_HEADER>-LGLCNTNTMSTSPRFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LCM_S_CTX_HEADER-LGLCNTNTMCONTEXTOWNER, sy-vline,
  WA_LCM_S_CTX_HEADER-LGLCNTNTMCONTEXTVALIDFROMDATE, sy-vline,
  WA_LCM_S_CTX_HEADER-LGLCNTNTMCONTEXTVALIDTODATE, sy-vline,
  WA_LCM_S_CTX_HEADER-LGLCNTNTMCNTXTLANGUAGE, sy-vline,
  WA_LCM_S_CTX_HEADER-LGLCNTNTMCONTEXTTITLE, sy-vline,
  WA_LCM_S_CTX_HEADER-LGLCNTNTMCNTXTISREADONLY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LCM_S_CTX_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_CTX_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_CTX_HEADER INTO WA_LCM_S_CTX_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 LGLCNTNTMCONTEXT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_S_CTX_HEADER-LGLCNTNTMCONTEXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_S_CTX_HEADER-LGLCNTNTMCONTEXT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LGLCNTNTMCNTXTLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_S_CTX_HEADER-LGLCNTNTMCNTXTLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_S_CTX_HEADER-LGLCNTNTMCNTXTLANGUAGE.
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_CTX_HEADER_STR, 
LGLCNTNTMCONTEXTUUID TYPE STRING,
LGLCNTNTMCONTEXT TYPE STRING,
LGLCNTNTMCONTEXTVERSION TYPE STRING,
LGLCNTNTMCONTEXTSTATUS TYPE STRING,
LGLCNTNTMSTSPRFL TYPE STRING,
LGLCNTNTMCONTEXTOWNER TYPE STRING,
LGLCNTNTMCONTEXTVALIDFROMDATE TYPE STRING,
LGLCNTNTMCONTEXTVALIDTODATE TYPE STRING,
LGLCNTNTMCNTXTLANGUAGE TYPE STRING,
LGLCNTNTMCONTEXTTITLE TYPE STRING,
LGLCNTNTMCNTXTISREADONLY TYPE STRING,
LGLCNTNTMPROFILE TYPE STRING,
LGLCNTNTMGOVLAW TYPE STRING,
LGLCNTNTMCNTXTACCESSLVL TYPE STRING,
LGLCNTNTMMAINORGTYPE TYPE STRING,
LGLCNTNTMMAINORGCOCODE TYPE STRING,
LGLCNTNTMMAINORGSALESORG TYPE STRING,
LGLCNTNTMMAINORGPURORG TYPE STRING,
LGLCNTNTMINTEGRATIONTYPE TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
LGLCNTNTMCREATEDBYUSER TYPE STRING,
LGLCNTNTMCHANGEDUTCDATETIME TYPE STRING,
LGLCNTNTMCHANGEDBYUSER TYPE STRING,
DUMMY_LCM_CONTEXT_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LCM_S_CTX_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_CTX_HEADER_STR-LGLCNTNTMCONTEXTUUID sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCONTEXT sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCONTEXTVERSION sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCONTEXTSTATUS sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMSTSPRFL sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCONTEXTOWNER sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCONTEXTVALIDFROMDATE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCONTEXTVALIDTODATE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCNTXTLANGUAGE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCONTEXTTITLE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCNTXTISREADONLY sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMPROFILE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMGOVLAW sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCNTXTACCESSLVL sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMMAINORGTYPE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMMAINORGCOCODE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMMAINORGSALESORG sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMMAINORGPURORG sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMINTEGRATIONTYPE sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCREATEDBYUSER sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCHANGEDUTCDATETIME sy-vline 
WA_LCM_S_CTX_HEADER_STR-LGLCNTNTMCHANGEDBYUSER sy-vline 
WA_LCM_S_CTX_HEADER_STR-DUMMY_LCM_CONTEXT_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.