ABAP Select data from SAP table CLCMLTFIRSTDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLCMLTFIRSTDOC
*  INTO TABLE @DATA(IT_CLCMLTFIRSTDOC2).
*--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_CLCMLTFIRSTDOC INDEX 1 INTO DATA(WA_CLCMLTFIRSTDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLCMLTFIRSTDOC>-MANDT = 1.
<CLCMLTFIRSTDOC>-LEGALTRANSACTIONUUID = 1.
<CLCMLTFIRSTDOC>-LGLCNTNTMDOCUMENTUUID = 1.
<CLCMLTFIRSTDOC>-LGLCNTNTMCREATEDUTCDATETIME = 1.
<CLCMLTFIRSTDOC>-LGLCNTNTMDOCFIRSTCRTEDDATETIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLCMLTFIRSTDOC-LGLCNTNTMCALENDARQUARTER, sy-vline,
  WA_CLCMLTFIRSTDOC-CALENDARYEAR, sy-vline,
  WA_CLCMLTFIRSTDOC-CURRENTYEAR, sy-vline,
  WA_CLCMLTFIRSTDOC-LGLCNTNTMCONTEXT, sy-vline,
  WA_CLCMLTFIRSTDOC-LGLCNTNTMCONTEXTVERSION, sy-vline,
  WA_CLCMLTFIRSTDOC-LGLCNTNTMENTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLCMLTFIRSTDOC 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_CLCMLTFIRSTDOC 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_CLCMLTFIRSTDOC INTO WA_CLCMLTFIRSTDOC.


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

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

*Conversion exit ALPHA, internal->external for field LEGALTRANSACTION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CLCMLTFIRSTDOC-LEGALTRANSACTION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CLCMLTFIRSTDOC-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_CLCMLTFIRSTDOC_STR, 
MANDT TYPE STRING,
LEGALTRANSACTIONUUID TYPE STRING,
LGLCNTNTMDOCUMENTUUID TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
LGLCNTNTMDOCFIRSTCRTEDDATETIME TYPE STRING,
LGLCNTNTMCALENDARQUARTER TYPE STRING,
CALENDARYEAR TYPE STRING,
CURRENTYEAR TYPE STRING,
LGLCNTNTMCONTEXT TYPE STRING,
LGLCNTNTMCONTEXTVERSION TYPE STRING,
LGLCNTNTMENTITY TYPE STRING,
LEGALTRANSACTION TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
LGLCNTNTMPROFILE TYPE STRING,
LGLTRANSACCESSLVL TYPE STRING,
LGLCNTNTMMAINORGCOCODE TYPE STRING,
LGLCNTNTMMAINORGSALESORG TYPE STRING,
LGLCNTNTMMAINORGPURORG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLCMLTFIRSTDOC_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_CLCMLTFIRSTDOC_STR-MANDT sy-vline 
WA_CLCMLTFIRSTDOC_STR-LEGALTRANSACTIONUUID sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMDOCUMENTUUID sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMDOCFIRSTCRTEDDATETIME sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMCALENDARQUARTER sy-vline 
WA_CLCMLTFIRSTDOC_STR-CALENDARYEAR sy-vline 
WA_CLCMLTFIRSTDOC_STR-CURRENTYEAR sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMCONTEXT sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMCONTEXTVERSION sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMENTITY sy-vline 
WA_CLCMLTFIRSTDOC_STR-LEGALTRANSACTION sy-vline 
WA_CLCMLTFIRSTDOC_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMPROFILE sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLTRANSACCESSLVL sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMMAINORGCOCODE sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMMAINORGSALESORG sy-vline 
WA_CLCMLTFIRSTDOC_STR-LGLCNTNTMMAINORGPURORG sy-vline      INTO ld_text SEPARATED BY SPACE.

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