ABAP Select data from SAP table CPS_TASK_LIST_MAINT_MTK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPS_TASK_LIST_MAINT_MTK
*  INTO TABLE @DATA(IT_CPS_TASK_LIST_MAINT_MTK2).
*--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_CPS_TASK_LIST_MAINT_MTK INDEX 1 INTO DATA(WA_CPS_TASK_LIST_MAINT_MTK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPS_TASK_LIST_MAINT_MTK>-MAINTAIN_MODE = 1.
<CPS_TASK_LIST_MAINT_MTK>-FLAG_BAR_POINTER = 1.
<CPS_TASK_LIST_MAINT_MTK>-MATERIAL = 1.
<CPS_TASK_LIST_MAINT_MTK>-PLANT = 1.
<CPS_TASK_LIST_MAINT_MTK>-DOC_NUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPS_TASK_LIST_MAINT_MTK-ITM_NUMBER, sy-vline,
  WA_CPS_TASK_LIST_MAINT_MTK-WORK_BREAKDOWN_STRUCT_ELE, sy-vline,
  WA_CPS_TASK_LIST_MAINT_MTK-WORK_BREAKDOWN_STRUCT_ELE_OLD, sy-vline,
  WA_CPS_TASK_LIST_MAINT_MTK-VENDOR, sy-vline,
  WA_CPS_TASK_LIST_MAINT_MTK-VENDOR_OLD, sy-vline,
  WA_CPS_TASK_LIST_MAINT_MTK-CUSTOMER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPS_TASK_LIST_MAINT_MTK 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_CPS_TASK_LIST_MAINT_MTK 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_CPS_TASK_LIST_MAINT_MTK INTO WA_CPS_TASK_LIST_MAINT_MTK.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CPS_TASK_LIST_MAINT_MTK-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPS_TASK_LIST_MAINT_MTK-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ABPSP, internal->external for field WORK_BREAKDOWN_STRUCT_ELE
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CPS_TASK_LIST_MAINT_MTK-WORK_BREAKDOWN_STRUCT_ELE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPS_TASK_LIST_MAINT_MTK-WORK_BREAKDOWN_STRUCT_ELE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field WORK_BREAKDOWN_STRUCT_ELE_OLD
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CPS_TASK_LIST_MAINT_MTK-WORK_BREAKDOWN_STRUCT_ELE_OLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPS_TASK_LIST_MAINT_MTK-WORK_BREAKDOWN_STRUCT_ELE_OLD.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit MATNL, internal->external for field MATERIAL_EXTERNAL
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_CPS_TASK_LIST_MAINT_MTK-MATERIAL_EXTERNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPS_TASK_LIST_MAINT_MTK-MATERIAL_EXTERNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNW, internal->external for field MATERIAL_VERSION
CALL FUNCTION 'CONVERSION_EXIT_MATNW_OUTPUT'
  EXPORTING
    input =                      WA_CPS_TASK_LIST_MAINT_MTK-MATERIAL_VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPS_TASK_LIST_MAINT_MTK-MATERIAL_VERSION.
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_CPS_TASK_LIST_MAINT_MTK_STR, 
MAINTAIN_MODE TYPE STRING,
FLAG_BAR_POINTER TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
DOC_NUMBER TYPE STRING,
ITM_NUMBER TYPE STRING,
WORK_BREAKDOWN_STRUCT_ELE TYPE STRING,
WORK_BREAKDOWN_STRUCT_ELE_OLD TYPE STRING,
VENDOR TYPE STRING,
VENDOR_OLD TYPE STRING,
CUSTOMER TYPE STRING,
CUSTOMER_OLD TYPE STRING,
SEARCH_FIELD TYPE STRING,
SEARCH_FIELD_OLD TYPE STRING,
MS_OBJECT TYPE STRING,
MS_OBJECT_OLD TYPE STRING,
MS_OBJTYPE TYPE STRING,
MS_OBJTYPE_OLD TYPE STRING,
MATERIAL_EXTERNAL TYPE STRING,
MATERIAL_GUID TYPE STRING,
MATERIAL_VERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPS_TASK_LIST_MAINT_MTK_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_CPS_TASK_LIST_MAINT_MTK_STR-MAINTAIN_MODE sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-FLAG_BAR_POINTER sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MATERIAL sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-PLANT sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-DOC_NUMBER sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-ITM_NUMBER sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-WORK_BREAKDOWN_STRUCT_ELE sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-WORK_BREAKDOWN_STRUCT_ELE_OLD sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-VENDOR sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-VENDOR_OLD sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-CUSTOMER sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-CUSTOMER_OLD sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-SEARCH_FIELD sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-SEARCH_FIELD_OLD sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MS_OBJECT sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MS_OBJECT_OLD sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MS_OBJTYPE sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MS_OBJTYPE_OLD sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MATERIAL_EXTERNAL sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MATERIAL_GUID sy-vline 
WA_CPS_TASK_LIST_MAINT_MTK_STR-MATERIAL_VERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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