ABAP Select data from SAP table /SAPAPO/MT_PLAN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/MT_PLAN 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 /SAPAPO/MT_PLAN. 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 /SAPAPO/MT_PLAN 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_/SAPAPO/MT_PLAN TYPE STANDARD TABLE OF /SAPAPO/MT_PLAN,
      WA_/SAPAPO/MT_PLAN TYPE /SAPAPO/MT_PLAN,
      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: </SAPAPO/MT_PLAN> TYPE /SAPAPO/MT_PLAN.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/MT_PLAN
  INTO TABLE IT_/SAPAPO/MT_PLAN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/MT_PLAN
*  INTO TABLE @DATA(IT_/SAPAPO/MT_PLAN2).
*--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_/SAPAPO/MT_PLAN INDEX 1 INTO DATA(WA_/SAPAPO/MT_PLAN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/MT_PLAN ASSIGNING </SAPAPO/MT_PLAN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/MT_PLAN>-DEL_FLG = 1.
</SAPAPO/MT_PLAN>-PLANID = 1.
</SAPAPO/MT_PLAN>-PLANNR = 1.
</SAPAPO/MT_PLAN>-CREATEUSER = 1.
</SAPAPO/MT_PLAN>-CREATEUTC = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/MT_PLAN INTO WA_/SAPAPO/MT_PLAN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/MT_PLAN-CHANGEUSER, sy-vline,
  WA_/SAPAPO/MT_PLAN-CHANGEUTC, sy-vline,
  WA_/SAPAPO/MT_PLAN-COST1, sy-vline,
  WA_/SAPAPO/MT_PLAN-COST2, sy-vline,
  WA_/SAPAPO/MT_PLAN-NOACT, sy-vline,
  WA_/SAPAPO/MT_PLAN-STATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/MT_PLAN 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_/SAPAPO/MT_PLAN 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_/SAPAPO/MT_PLAN INTO WA_/SAPAPO/MT_PLAN.


*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 TSTLC, internal->external for field CREATEUTC
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MT_PLAN-CREATEUTC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MT_PLAN-CREATEUTC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CHANGEUTC
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/MT_PLAN-CHANGEUTC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/MT_PLAN-CHANGEUTC.
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_/SAPAPO/MT_PLAN_STR, 
DEL_FLG TYPE STRING,
PLANID TYPE STRING,
PLANNR TYPE STRING,
CREATEUSER TYPE STRING,
CREATEUTC TYPE STRING,
CHANGEUSER TYPE STRING,
CHANGEUTC TYPE STRING,
COST1 TYPE STRING,
COST2 TYPE STRING,
NOACT TYPE STRING,
STATE TYPE STRING,
PL_USAGE TYPE STRING,
COST_FIX TYPE STRING,
COST_VAR TYPE STRING,
PROP_EXIST TYPE STRING,
REL_PLANID TYPE STRING,
COSID TYPE STRING,
TIPP TYPE STRING,
COSEX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/MT_PLAN_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_/SAPAPO/MT_PLAN_STR-DEL_FLG sy-vline 
WA_/SAPAPO/MT_PLAN_STR-PLANID sy-vline 
WA_/SAPAPO/MT_PLAN_STR-PLANNR sy-vline 
WA_/SAPAPO/MT_PLAN_STR-CREATEUSER sy-vline 
WA_/SAPAPO/MT_PLAN_STR-CREATEUTC sy-vline 
WA_/SAPAPO/MT_PLAN_STR-CHANGEUSER sy-vline 
WA_/SAPAPO/MT_PLAN_STR-CHANGEUTC sy-vline 
WA_/SAPAPO/MT_PLAN_STR-COST1 sy-vline 
WA_/SAPAPO/MT_PLAN_STR-COST2 sy-vline 
WA_/SAPAPO/MT_PLAN_STR-NOACT sy-vline 
WA_/SAPAPO/MT_PLAN_STR-STATE sy-vline 
WA_/SAPAPO/MT_PLAN_STR-PL_USAGE sy-vline 
WA_/SAPAPO/MT_PLAN_STR-COST_FIX sy-vline 
WA_/SAPAPO/MT_PLAN_STR-COST_VAR sy-vline 
WA_/SAPAPO/MT_PLAN_STR-PROP_EXIST sy-vline 
WA_/SAPAPO/MT_PLAN_STR-REL_PLANID sy-vline 
WA_/SAPAPO/MT_PLAN_STR-COSID sy-vline 
WA_/SAPAPO/MT_PLAN_STR-TIPP sy-vline 
WA_/SAPAPO/MT_PLAN_STR-COSEX sy-vline      INTO ld_text SEPARATED BY SPACE.

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