ABAP Select data from SAP table CPMRPSLACK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CPMRPSLACK
*  INTO TABLE @DATA(IT_CPMRPSLACK2).
*--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_CPMRPSLACK INDEX 1 INTO DATA(WA_CPMRPSLACK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CPMRPSLACK>-MANDT = 1.
<CPMRPSLACK>-PMRPSIMULATION = 1.
<CPMRPSLACK>-PMRPISSUECATEGORY = 1.
<CPMRPSLACK>-PMRPRESOURCEINTERNALID = 1.
<CPMRPSLACK>-PMRPFLEXIBLECONSTRAINT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CPMRPSLACK-PMRPSUPPLYGROUP, sy-vline,
  WA_CPMRPSLACK-PMRPSUPPLYGROUPCATEGORY, sy-vline,
  WA_CPMRPSLACK-PRODUCT, sy-vline,
  WA_CPMRPSLACK-PLANT, sy-vline,
  WA_CPMRPSLACK-MRPAREA, sy-vline,
  WA_CPMRPSLACK-TOPLEVELPRODUCT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CPMRPSLACK 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_CPMRPSLACK 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_CPMRPSLACK INTO WA_CPMRPSLACK.


*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 PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CPMRPSLACK-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CPMRPSLACK-PRODUCT.
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_CPMRPSLACK_STR, 
MANDT TYPE STRING,
PMRPSIMULATION TYPE STRING,
PMRPISSUECATEGORY TYPE STRING,
PMRPRESOURCEINTERNALID TYPE STRING,
PMRPFLEXIBLECONSTRAINT TYPE STRING,
PMRPSUPPLYGROUP TYPE STRING,
PMRPSUPPLYGROUPCATEGORY TYPE STRING,
PRODUCT TYPE STRING,
PLANT TYPE STRING,
MRPAREA TYPE STRING,
TOPLEVELPRODUCT TYPE STRING,
TOPLEVELPLANT TYPE STRING,
TOPLEVELMRPAREA TYPE STRING,
MATERIALNAME TYPE STRING,
PMRPNUMBEROFAFFECTEDBUCKETS TYPE STRING,
PMRPDELTAQUANTITY TYPE STRING,
UNITOFMEASURE TYPE STRING,
PMRPREFERENCEPLAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CPMRPSLACK_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_CPMRPSLACK_STR-MANDT sy-vline 
WA_CPMRPSLACK_STR-PMRPSIMULATION sy-vline 
WA_CPMRPSLACK_STR-PMRPISSUECATEGORY sy-vline 
WA_CPMRPSLACK_STR-PMRPRESOURCEINTERNALID sy-vline 
WA_CPMRPSLACK_STR-PMRPFLEXIBLECONSTRAINT sy-vline 
WA_CPMRPSLACK_STR-PMRPSUPPLYGROUP sy-vline 
WA_CPMRPSLACK_STR-PMRPSUPPLYGROUPCATEGORY sy-vline 
WA_CPMRPSLACK_STR-PRODUCT sy-vline 
WA_CPMRPSLACK_STR-PLANT sy-vline 
WA_CPMRPSLACK_STR-MRPAREA sy-vline 
WA_CPMRPSLACK_STR-TOPLEVELPRODUCT sy-vline 
WA_CPMRPSLACK_STR-TOPLEVELPLANT sy-vline 
WA_CPMRPSLACK_STR-TOPLEVELMRPAREA sy-vline 
WA_CPMRPSLACK_STR-MATERIALNAME sy-vline 
WA_CPMRPSLACK_STR-PMRPNUMBEROFAFFECTEDBUCKETS sy-vline 
WA_CPMRPSLACK_STR-PMRPDELTAQUANTITY sy-vline 
WA_CPMRPSLACK_STR-UNITOFMEASURE sy-vline 
WA_CPMRPSLACK_STR-PMRPREFERENCEPLAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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