ABAP Select data from SAP table PRSHMAINTPLAN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PRSHMAINTPLAN
*  INTO TABLE @DATA(IT_PRSHMAINTPLAN2).
*--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_PRSHMAINTPLAN INDEX 1 INTO DATA(WA_PRSHMAINTPLAN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PRSHMAINTPLAN>-MANDT = 1.
<PRSHMAINTPLAN>-MAINTENANCEPLAN = 1.
<PRSHMAINTPLAN>-MAINTENANCEPLANCALLNUMBER = 1.
<PRSHMAINTPLAN>-MAINTENANCEITEM = 1.
<PRSHMAINTPLAN>-OPERATION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PRSHMAINTPLAN-SUBOPERATION, sy-vline,
  WA_PRSHMAINTPLAN-BASICSTARTDATE, sy-vline,
  WA_PRSHMAINTPLAN-BILLOFOPERATIONSTYPE, sy-vline,
  WA_PRSHMAINTPLAN-BILLOFOPERATIONSGROUP, sy-vline,
  WA_PRSHMAINTPLAN-BILLOFOPERATIONSVARIANT, sy-vline,
  WA_PRSHMAINTPLAN-MAINTENANCESTRATEGY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PRSHMAINTPLAN 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_PRSHMAINTPLAN 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_PRSHMAINTPLAN INTO WA_PRSHMAINTPLAN.


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

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

*Conversion exit NUMCV, internal->external for field OPERATION
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_PRSHMAINTPLAN-OPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRSHMAINTPLAN-OPERATION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field SUBOPERATION
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_PRSHMAINTPLAN-SUBOPERATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRSHMAINTPLAN-SUBOPERATION.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field BILLOFOPERATIONSVARIANT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PRSHMAINTPLAN-BILLOFOPERATIONSVARIANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PRSHMAINTPLAN-BILLOFOPERATIONSVARIANT.
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_PRSHMAINTPLAN_STR, 
MANDT TYPE STRING,
MAINTENANCEPLAN TYPE STRING,
MAINTENANCEPLANCALLNUMBER TYPE STRING,
MAINTENANCEITEM TYPE STRING,
OPERATION TYPE STRING,
SUBOPERATION TYPE STRING,
BASICSTARTDATE TYPE STRING,
BILLOFOPERATIONSTYPE TYPE STRING,
BILLOFOPERATIONSGROUP TYPE STRING,
BILLOFOPERATIONSVARIANT TYPE STRING,
MAINTENANCESTRATEGY TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTER TYPE STRING,
CAPACITYINTERNALID TYPE STRING,
PLANT TYPE STRING,
WORKCENTERCATEGORYCODE TYPE STRING,
MAINTENANCEACTIVITYTYPE TYPE STRING,
PRIORITY TYPE STRING,
ORDERTYPE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
CONTROLKEY TYPE STRING,
TOTALWORK TYPE STRING,
TOTALWORKUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PRSHMAINTPLAN_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_PRSHMAINTPLAN_STR-MANDT sy-vline 
WA_PRSHMAINTPLAN_STR-MAINTENANCEPLAN sy-vline 
WA_PRSHMAINTPLAN_STR-MAINTENANCEPLANCALLNUMBER sy-vline 
WA_PRSHMAINTPLAN_STR-MAINTENANCEITEM sy-vline 
WA_PRSHMAINTPLAN_STR-OPERATION sy-vline 
WA_PRSHMAINTPLAN_STR-SUBOPERATION sy-vline 
WA_PRSHMAINTPLAN_STR-BASICSTARTDATE sy-vline 
WA_PRSHMAINTPLAN_STR-BILLOFOPERATIONSTYPE sy-vline 
WA_PRSHMAINTPLAN_STR-BILLOFOPERATIONSGROUP sy-vline 
WA_PRSHMAINTPLAN_STR-BILLOFOPERATIONSVARIANT sy-vline 
WA_PRSHMAINTPLAN_STR-MAINTENANCESTRATEGY sy-vline 
WA_PRSHMAINTPLAN_STR-WORKCENTERTYPECODE sy-vline 
WA_PRSHMAINTPLAN_STR-WORKCENTERINTERNALID sy-vline 
WA_PRSHMAINTPLAN_STR-WORKCENTER sy-vline 
WA_PRSHMAINTPLAN_STR-CAPACITYINTERNALID sy-vline 
WA_PRSHMAINTPLAN_STR-PLANT sy-vline 
WA_PRSHMAINTPLAN_STR-WORKCENTERCATEGORYCODE sy-vline 
WA_PRSHMAINTPLAN_STR-MAINTENANCEACTIVITYTYPE sy-vline 
WA_PRSHMAINTPLAN_STR-PRIORITY sy-vline 
WA_PRSHMAINTPLAN_STR-ORDERTYPE sy-vline 
WA_PRSHMAINTPLAN_STR-VALIDITYSTARTDATE sy-vline 
WA_PRSHMAINTPLAN_STR-VALIDITYENDDATE sy-vline 
WA_PRSHMAINTPLAN_STR-CONTROLKEY sy-vline 
WA_PRSHMAINTPLAN_STR-TOTALWORK sy-vline 
WA_PRSHMAINTPLAN_STR-TOTALWORKUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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