ABAP Select data from SAP table IPCKTLOPALCDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IPCKTLOPALCDATA
*  INTO TABLE @DATA(IT_IPCKTLOPALCDATA2).
*--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_IPCKTLOPALCDATA INDEX 1 INTO DATA(WA_IPCKTLOPALCDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IPCKTLOPALCDATA>-MANDT = 1.
<IPCKTLOPALCDATA>-TASKLISTTYPE = 1.
<IPCKTLOPALCDATA>-TASKLISTGROUP = 1.
<IPCKTLOPALCDATA>-TASKLISTGROUPCOUNTER = 1.
<IPCKTLOPALCDATA>-SEQUENCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IPCKTLOPALCDATA-TASKLISTOPERATIONINTERNALID, sy-vline,
  WA_IPCKTLOPALCDATA-MAINTENANCEPACKAGE, sy-vline,
  WA_IPCKTLOPALCDATA-MAINTPCKGTSKLISTOPALLOCINTNMBR, sy-vline,
  WA_IPCKTLOPALCDATA-VALIDITYSTARTDATE, sy-vline,
  WA_IPCKTLOPALCDATA-MAINTENANCEPACKAGEISREQUIRED, sy-vline,
  WA_IPCKTLOPALCDATA-ALLOCISMAINTAINEDBYMAINTPLAN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IPCKTLOPALCDATA 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_IPCKTLOPALCDATA 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_IPCKTLOPALCDATA INTO WA_IPCKTLOPALCDATA.


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

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

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

*Conversion exit ALPHA, internal->external for field CHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IPCKTLOPALCDATA-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IPCKTLOPALCDATA-CHANGENUMBER.
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_IPCKTLOPALCDATA_STR, 
MANDT TYPE STRING,
TASKLISTTYPE TYPE STRING,
TASKLISTGROUP TYPE STRING,
TASKLISTGROUPCOUNTER TYPE STRING,
SEQUENCE TYPE STRING,
TASKLISTOPERATIONINTERNALID TYPE STRING,
MAINTENANCEPACKAGE TYPE STRING,
MAINTPCKGTSKLISTOPALLOCINTNMBR TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
MAINTENANCEPACKAGEISREQUIRED TYPE STRING,
ALLOCISMAINTAINEDBYMAINTPLAN TYPE STRING,
ISDELETED TYPE STRING,
MAINTENANCESTRATEGY TYPE STRING,
ALLOCATIONHASINACTIVECHANGES TYPE STRING,
CHANGENUMBER TYPE STRING,
CREATIONDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IPCKTLOPALCDATA_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_IPCKTLOPALCDATA_STR-MANDT sy-vline 
WA_IPCKTLOPALCDATA_STR-TASKLISTTYPE sy-vline 
WA_IPCKTLOPALCDATA_STR-TASKLISTGROUP sy-vline 
WA_IPCKTLOPALCDATA_STR-TASKLISTGROUPCOUNTER sy-vline 
WA_IPCKTLOPALCDATA_STR-SEQUENCE sy-vline 
WA_IPCKTLOPALCDATA_STR-TASKLISTOPERATIONINTERNALID sy-vline 
WA_IPCKTLOPALCDATA_STR-MAINTENANCEPACKAGE sy-vline 
WA_IPCKTLOPALCDATA_STR-MAINTPCKGTSKLISTOPALLOCINTNMBR sy-vline 
WA_IPCKTLOPALCDATA_STR-VALIDITYSTARTDATE sy-vline 
WA_IPCKTLOPALCDATA_STR-MAINTENANCEPACKAGEISREQUIRED sy-vline 
WA_IPCKTLOPALCDATA_STR-ALLOCISMAINTAINEDBYMAINTPLAN sy-vline 
WA_IPCKTLOPALCDATA_STR-ISDELETED sy-vline 
WA_IPCKTLOPALCDATA_STR-MAINTENANCESTRATEGY sy-vline 
WA_IPCKTLOPALCDATA_STR-ALLOCATIONHASINACTIVECHANGES sy-vline 
WA_IPCKTLOPALCDATA_STR-CHANGENUMBER sy-vline 
WA_IPCKTLOPALCDATA_STR-CREATIONDATE sy-vline 
WA_IPCKTLOPALCDATA_STR-CREATEDBYUSER sy-vline 
WA_IPCKTLOPALCDATA_STR-LASTCHANGEDATE sy-vline 
WA_IPCKTLOPALCDATA_STR-LASTCHANGEDBYUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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