ABAP Select data from SAP table MPD_MAINTPLAN into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MPD_MAINTPLAN
*  INTO TABLE @DATA(IT_MPD_MAINTPLAN2).
*--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_MPD_MAINTPLAN INDEX 1 INTO DATA(WA_MPD_MAINTPLAN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MPD_MAINTPLAN>-RFCDEST = 1.
<MPD_MAINTPLAN>-OBJECT_HANDLE = 1.
<MPD_MAINTPLAN>-LOGSYS = 1.
<MPD_MAINTPLAN>-MPLNR = 1.
<MPD_MAINTPLAN>-MPTXT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MPD_MAINTPLAN-MPICON, sy-vline,
  WA_MPD_MAINTPLAN-PLNTY, sy-vline,
  WA_MPD_MAINTPLAN-PLNNR, sy-vline,
  WA_MPD_MAINTPLAN-PLNAL, sy-vline,
  WA_MPD_MAINTPLAN-EQUNR, sy-vline,
  WA_MPD_MAINTPLAN-TPLNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MPD_MAINTPLAN 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_MPD_MAINTPLAN 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_MPD_MAINTPLAN INTO WA_MPD_MAINTPLAN.


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

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

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

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

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

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_MPD_MAINTPLAN-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MPD_MAINTPLAN-TPLNR.
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_MPD_MAINTPLAN_STR, 
RFCDEST TYPE STRING,
OBJECT_HANDLE TYPE STRING,
LOGSYS TYPE STRING,
MPLNR TYPE STRING,
MPTXT TYPE STRING,
MPICON TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
EQUNR TYPE STRING,
TPLNR TYPE STRING,
SELECTED TYPE STRING,
NOT_SELECTABLE TYPE STRING,
NOT_EXIST TYPE STRING,
FLAG_DELETE TYPE STRING,
FLAG_INACTIVE TYPE STRING,
FLAG_DELETED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MPD_MAINTPLAN_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_MPD_MAINTPLAN_STR-RFCDEST sy-vline 
WA_MPD_MAINTPLAN_STR-OBJECT_HANDLE sy-vline 
WA_MPD_MAINTPLAN_STR-LOGSYS sy-vline 
WA_MPD_MAINTPLAN_STR-MPLNR sy-vline 
WA_MPD_MAINTPLAN_STR-MPTXT sy-vline 
WA_MPD_MAINTPLAN_STR-MPICON sy-vline 
WA_MPD_MAINTPLAN_STR-PLNTY sy-vline 
WA_MPD_MAINTPLAN_STR-PLNNR sy-vline 
WA_MPD_MAINTPLAN_STR-PLNAL sy-vline 
WA_MPD_MAINTPLAN_STR-EQUNR sy-vline 
WA_MPD_MAINTPLAN_STR-TPLNR sy-vline 
WA_MPD_MAINTPLAN_STR-SELECTED sy-vline 
WA_MPD_MAINTPLAN_STR-NOT_SELECTABLE sy-vline 
WA_MPD_MAINTPLAN_STR-NOT_EXIST sy-vline 
WA_MPD_MAINTPLAN_STR-FLAG_DELETE sy-vline 
WA_MPD_MAINTPLAN_STR-FLAG_INACTIVE sy-vline 
WA_MPD_MAINTPLAN_STR-FLAG_DELETED sy-vline      INTO ld_text SEPARATED BY SPACE.

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