ABAP Select data from SAP table ICSLITHEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICSLITHEADER
*  INTO TABLE @DATA(IT_ICSLITHEADER2).
*--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_ICSLITHEADER INDEX 1 INTO DATA(WA_ICSLITHEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICSLITHEADER>-CLIENT = 1.
<ICSLITHEADER>-ACTIVE = 1.
<ICSLITHEADER>-CLAIM = 1.
<ICSLITHEADER>-LITHGUID = 1.
<ICSLITHEADER>-CHANGETIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICSLITHEADER-CHANGEDBY, sy-vline,
  WA_ICSLITHEADER-DELETED, sy-vline,
  WA_ICSLITHEADER-LITH_NAME, sy-vline,
  WA_ICSLITHEADER-SUBOBJECT, sy-vline,
  WA_ICSLITHEADER-LITTYPE, sy-vline,
  WA_ICSLITHEADER-DESCR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICSLITHEADER 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_ICSLITHEADER 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_ICSLITHEADER INTO WA_ICSLITHEADER.


*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 CLAIM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICSLITHEADER-CLAIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICSLITHEADER-CLAIM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTAM, internal->external for field CHANGETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICSLITHEADER-CHANGETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICSLITHEADER-CHANGETIME.
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_ICSLITHEADER_STR, 
CLIENT TYPE STRING,
ACTIVE TYPE STRING,
CLAIM TYPE STRING,
LITHGUID TYPE STRING,
CHANGETIME TYPE STRING,
CHANGEDBY TYPE STRING,
DELETED TYPE STRING,
LITH_NAME TYPE STRING,
SUBOBJECT TYPE STRING,
LITTYPE TYPE STRING,
DESCR TYPE STRING,
STARTDATE TYPE STRING,
ENDDATE TYPE STRING,
LITISSUE TYPE STRING,
CURRENCY TYPE STRING,
ESTIMAMOUNT TYPE STRING,
LITAMOUNT TYPE STRING,
COUNSELBUDGET TYPE STRING,
DISCLOSUREDATE TYPE STRING,
SOLPERIODDATE TYPE STRING,
LIABILITY TYPE STRING,
SETTLEMENT TYPE STRING,
SETTLED TYPE STRING,
CANCELLED TYPE STRING,
FINISHED TYPE STRING,
REOPENED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICSLITHEADER_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_ICSLITHEADER_STR-CLIENT sy-vline 
WA_ICSLITHEADER_STR-ACTIVE sy-vline 
WA_ICSLITHEADER_STR-CLAIM sy-vline 
WA_ICSLITHEADER_STR-LITHGUID sy-vline 
WA_ICSLITHEADER_STR-CHANGETIME sy-vline 
WA_ICSLITHEADER_STR-CHANGEDBY sy-vline 
WA_ICSLITHEADER_STR-DELETED sy-vline 
WA_ICSLITHEADER_STR-LITH_NAME sy-vline 
WA_ICSLITHEADER_STR-SUBOBJECT sy-vline 
WA_ICSLITHEADER_STR-LITTYPE sy-vline 
WA_ICSLITHEADER_STR-DESCR sy-vline 
WA_ICSLITHEADER_STR-STARTDATE sy-vline 
WA_ICSLITHEADER_STR-ENDDATE sy-vline 
WA_ICSLITHEADER_STR-LITISSUE sy-vline 
WA_ICSLITHEADER_STR-CURRENCY sy-vline 
WA_ICSLITHEADER_STR-ESTIMAMOUNT sy-vline 
WA_ICSLITHEADER_STR-LITAMOUNT sy-vline 
WA_ICSLITHEADER_STR-COUNSELBUDGET sy-vline 
WA_ICSLITHEADER_STR-DISCLOSUREDATE sy-vline 
WA_ICSLITHEADER_STR-SOLPERIODDATE sy-vline 
WA_ICSLITHEADER_STR-LIABILITY sy-vline 
WA_ICSLITHEADER_STR-SETTLEMENT sy-vline 
WA_ICSLITHEADER_STR-SETTLED sy-vline 
WA_ICSLITHEADER_STR-CANCELLED sy-vline 
WA_ICSLITHEADER_STR-FINISHED sy-vline 
WA_ICSLITHEADER_STR-REOPENED sy-vline      INTO ld_text SEPARATED BY SPACE.

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