ABAP Select data from SAP table ESH_L_CLFNCLASS into internal table

Get Example source ABAP code based on a different SAP table
  

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ESH_L_CLFNCLASS
*  INTO TABLE @DATA(IT_ESH_L_CLFNCLASS2).
*--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_ESH_L_CLFNCLASS INDEX 1 INTO DATA(WA_ESH_L_CLFNCLASS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ESH_L_CLFNCLASS ASSIGNING <ESH_L_CLFNCLASS>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<ESH_L_CLFNCLASS>-MANDT = 1.
<ESH_L_CLFNCLASS>-CLASSINTERNALID = 1.
<ESH_L_CLFNCLASS>-CHARACTERISTIC = 1.
<ESH_L_CLFNCLASS>-CHARCDESCRIPTION = 1.
<ESH_L_CLFNCLASS>-CHARCMAINTAUTHGRP = 1.
ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ESH_L_CLFNCLASS-CLASS, sy-vline,
WA_ESH_L_CLFNCLASS-CLASSDESCRIPTION, sy-vline,
WA_ESH_L_CLFNCLASS-CLASSGROUP, sy-vline,
WA_ESH_L_CLFNCLASS-CLASSGROUPNAME, sy-vline,
WA_ESH_L_CLFNCLASS-CLASSKEYWORDTEXT, sy-vline,
WA_ESH_L_CLFNCLASS-CLASSMAINTAUTHGRP, sy-vline.
ENDLOOP. *Add any further fields from structure WA_ESH_L_CLFNCLASS 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_ESH_L_CLFNCLASS 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_ESH_L_CLFNCLASS INTO WA_ESH_L_CLFNCLASS. *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_ESH_L_CLFNCLASS_STR,
MANDT TYPE STRING,
CLASSINTERNALID TYPE STRING,
CHARACTERISTIC TYPE STRING,
CHARCDESCRIPTION TYPE STRING,
CHARCMAINTAUTHGRP TYPE STRING,
CLASS TYPE STRING,
CLASSDESCRIPTION TYPE STRING,
CLASSGROUP TYPE STRING,
CLASSGROUPNAME TYPE STRING,
CLASSKEYWORDTEXT TYPE STRING,
CLASSMAINTAUTHGRP TYPE STRING,
CLASSSTATUS TYPE STRING,
CLASSSTATUSNAME TYPE STRING,
CLASSTYPE TYPE STRING,
CLASSTYPENAME TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDBYUSERDESCRIPTION TYPE STRING,
CREATEDBYUSERDESCRIPTION TYPE STRING,END OF T_EKKO_STR. DATA: WA_ESH_L_CLFNCLASS_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_ESH_L_CLFNCLASS_STR-MANDT sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSINTERNALID sy-vline
WA_ESH_L_CLFNCLASS_STR-CHARACTERISTIC sy-vline
WA_ESH_L_CLFNCLASS_STR-CHARCDESCRIPTION sy-vline
WA_ESH_L_CLFNCLASS_STR-CHARCMAINTAUTHGRP sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASS sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSDESCRIPTION sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSGROUP sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSGROUPNAME sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSKEYWORDTEXT sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSMAINTAUTHGRP sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSSTATUS sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSSTATUSNAME sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSTYPE sy-vline
WA_ESH_L_CLFNCLASS_STR-CLASSTYPENAME sy-vline
WA_ESH_L_CLFNCLASS_STR-CREATEDBYUSER sy-vline
WA_ESH_L_CLFNCLASS_STR-CREATIONDATE sy-vline
WA_ESH_L_CLFNCLASS_STR-LASTCHANGEDATE sy-vline
WA_ESH_L_CLFNCLASS_STR-LASTCHANGEDBYUSER sy-vline
WA_ESH_L_CLFNCLASS_STR-LASTCHANGEDBYUSERDESCRIPTION sy-vline
WA_ESH_L_CLFNCLASS_STR-CREATEDBYUSERDESCRIPTION sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.