ABAP Select data from SAP table CLVMDOCSTAMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLVMDOCSTAMP
*  INTO TABLE @DATA(IT_CLVMDOCSTAMP2).
*--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_CLVMDOCSTAMP INDEX 1 INTO DATA(WA_CLVMDOCSTAMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLVMDOCSTAMP>-MANDT = 1.
<CLVMDOCSTAMP>-LGLCNTNTMDOCUMENTUUID = 1.
<CLVMDOCSTAMP>-LGLCNTNTMDOCUMENTSTAMPUUID = 1.
<CLVMDOCSTAMP>-LGLCNTNTMDOCUMENTSTAMP = 1.
<CLVMDOCSTAMP>-LGLCNTNTMDOCUMENTSTAMPNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLVMDOCSTAMP-LGLCNTNTMCREATEDUTCDATETIME, sy-vline,
  WA_CLVMDOCSTAMP-LGLCNTNTMCONTEXT, sy-vline,
  WA_CLVMDOCSTAMP-LGLCNTNTMCONTEXTVERSION, sy-vline,
  WA_CLVMDOCSTAMP-LGLCNTNTMENTITY, sy-vline,
  WA_CLVMDOCSTAMP-LEGALTRANSACTIONUUID, sy-vline,
  WA_CLVMDOCSTAMP-LEGALTRANSACTION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLVMDOCSTAMP 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_CLVMDOCSTAMP 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_CLVMDOCSTAMP INTO WA_CLVMDOCSTAMP.


*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_CLVMDOCSTAMP-LGLCNTNTMCONTEXT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLVMDOCSTAMP-LGLCNTNTMCONTEXT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LEGALTRANSACTION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CLVMDOCSTAMP-LEGALTRANSACTION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLVMDOCSTAMP-LEGALTRANSACTION.
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_CLVMDOCSTAMP_STR, 
MANDT TYPE STRING,
LGLCNTNTMDOCUMENTUUID TYPE STRING,
LGLCNTNTMDOCUMENTSTAMPUUID TYPE STRING,
LGLCNTNTMDOCUMENTSTAMP TYPE STRING,
LGLCNTNTMDOCUMENTSTAMPNAME TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
LGLCNTNTMCONTEXT TYPE STRING,
LGLCNTNTMCONTEXTVERSION TYPE STRING,
LGLCNTNTMENTITY TYPE STRING,
LEGALTRANSACTIONUUID TYPE STRING,
LEGALTRANSACTION TYPE STRING,
LGLCNTNTMPROFILE TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
INTERNALDOCUMENTSTATUS TYPE STRING,
LGLCNTNTMDOCCONTENTTYPE TYPE STRING,
CALENDARQUARTER TYPE STRING,
CALENDARYEAR TYPE STRING,
CURRENTQUARTER TYPE STRING,
YEARQUARTER TYPE STRING,
LGLCNTNTMDOCACCESSLVL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLVMDOCSTAMP_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_CLVMDOCSTAMP_STR-MANDT sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMDOCUMENTUUID sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMDOCUMENTSTAMPUUID sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMDOCUMENTSTAMP sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMDOCUMENTSTAMPNAME sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMCONTEXT sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMCONTEXTVERSION sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMENTITY sy-vline 
WA_CLVMDOCSTAMP_STR-LEGALTRANSACTIONUUID sy-vline 
WA_CLVMDOCSTAMP_STR-LEGALTRANSACTION sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMPROFILE sy-vline 
WA_CLVMDOCSTAMP_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_CLVMDOCSTAMP_STR-INTERNALDOCUMENTSTATUS sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMDOCCONTENTTYPE sy-vline 
WA_CLVMDOCSTAMP_STR-CALENDARQUARTER sy-vline 
WA_CLVMDOCSTAMP_STR-CALENDARYEAR sy-vline 
WA_CLVMDOCSTAMP_STR-CURRENTQUARTER sy-vline 
WA_CLVMDOCSTAMP_STR-YEARQUARTER sy-vline 
WA_CLVMDOCSTAMP_STR-LGLCNTNTMDOCACCESSLVL sy-vline      INTO ld_text SEPARATED BY SPACE.

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