ABAP Select data from SAP table CLCMCATEG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLCMCATEG
*  INTO TABLE @DATA(IT_CLCMCATEG2).
*--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_CLCMCATEG INDEX 1 INTO DATA(WA_CLCMCATEG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLCMCATEG>-MANDT = 1.
<CLCMCATEG>-LEGALCATEGORY = 1.
<CLCMCATEG>-LGLCNTNTMCATEGORYNAME = 1.
<CLCMCATEG>-LGLCNTNTMCATEGORYNAMESYST = 1.
<CLCMCATEG>-LGLCNTNTMCATEGORYNAMEINENGLISH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLCMCATEG-LGLCNTNTMCATTYPE, sy-vline,
  WA_CLCMCATEG-LGLCNTNTMCATISSELECT, sy-vline,
  WA_CLCMCATEG-LGLCNTNTMCATISSELECTFILTER, sy-vline,
  WA_CLCMCATEG-LGLCNTNTMCATISOBSOLETE, sy-vline,
  WA_CLCMCATEG-LGLCNTNTMCATISOBSOLETEFILTER, sy-vline,
  WA_CLCMCATEG-LGLCNTNTMCATPURPOSE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLCMCATEG 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_CLCMCATEG 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_CLCMCATEG INTO WA_CLCMCATEG.


*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_CLCMCATEG_STR, 
MANDT TYPE STRING,
LEGALCATEGORY TYPE STRING,
LGLCNTNTMCATEGORYNAME TYPE STRING,
LGLCNTNTMCATEGORYNAMESYST TYPE STRING,
LGLCNTNTMCATEGORYNAMEINENGLISH TYPE STRING,
LGLCNTNTMCATTYPE TYPE STRING,
LGLCNTNTMCATISSELECT TYPE STRING,
LGLCNTNTMCATISSELECTFILTER TYPE STRING,
LGLCNTNTMCATISOBSOLETE TYPE STRING,
LGLCNTNTMCATISOBSOLETEFILTER TYPE STRING,
LGLCNTNTMCATPURPOSE TYPE STRING,
LGLCNTNTMCATISMULTISELECTION TYPE STRING,
LGLCNTNTMCATLEVEL TYPE STRING,
LGLCNTNTMCATMODEL TYPE STRING,
LGLCNTNTMCATCONSTANT TYPE STRING,
LGLCNTNTMCATISSYSTGENERATED TYPE STRING,
LGLCNTNTMCATISUPDATEFROMTABLE TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
LGLCNTNTMCREATEDBYUSER TYPE STRING,
LGLCNTNTMCREATEDBYFULLNAME TYPE STRING,
LGLCNTNTMCHANGEDUTCDATETIME TYPE STRING,
LGLCNTNTMCHANGEDBYUSER TYPE STRING,
LGLCNTNTMCHANGEDBYFULLNAME TYPE STRING,
LGLCNTNTMPARENTCATEGORY TYPE STRING,
LGLCNTNTMPARENTCATEGORYNAME TYPE STRING,
LGLCNTNTMPARCATISOBSOLETE TYPE STRING,
CHANGEDOCOBJECT TYPE STRING,
LGLCNTNTMLONGTEXT TYPE STRING,
LGLCNTNTMLONGTEXTMIMETYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLCMCATEG_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_CLCMCATEG_STR-MANDT sy-vline 
WA_CLCMCATEG_STR-LEGALCATEGORY sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATEGORYNAME sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATEGORYNAMESYST sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATEGORYNAMEINENGLISH sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATTYPE sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATISSELECT sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATISSELECTFILTER sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATISOBSOLETE sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATISOBSOLETEFILTER sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATPURPOSE sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATISMULTISELECTION sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATLEVEL sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATMODEL sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATCONSTANT sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATISSYSTGENERATED sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCATISUPDATEFROMTABLE sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCREATEDBYUSER sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCREATEDBYFULLNAME sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCHANGEDUTCDATETIME sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCHANGEDBYUSER sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMCHANGEDBYFULLNAME sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMPARENTCATEGORY sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMPARENTCATEGORYNAME sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMPARCATISOBSOLETE sy-vline 
WA_CLCMCATEG_STR-CHANGEDOCOBJECT sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMLONGTEXT sy-vline 
WA_CLCMCATEG_STR-LGLCNTNTMLONGTEXTMIMETYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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