ABAP Select data from SAP table MSAM10_METER_READING_NOTE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MSAM10_METER_READING_NOTE 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 MSAM10_METER_READING_NOTE. 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 MSAM10_METER_READING_NOTE 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_MSAM10_METER_READING_NOTE TYPE STANDARD TABLE OF MSAM10_METER_READING_NOTE,
      WA_MSAM10_METER_READING_NOTE TYPE MSAM10_METER_READING_NOTE,
      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: <MSAM10_METER_READING_NOTE> TYPE MSAM10_METER_READING_NOTE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MSAM10_METER_READING_NOTE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MSAM10_METER_READING_NOTE
  INTO TABLE IT_MSAM10_METER_READING_NOTE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSAM10_METER_READING_NOTE
*  INTO TABLE @DATA(IT_MSAM10_METER_READING_NOTE2).
*--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_MSAM10_METER_READING_NOTE INDEX 1 INTO DATA(WA_MSAM10_METER_READING_NOTE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MSAM10_METER_READING_NOTE ASSIGNING <MSAM10_METER_READING_NOTE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSAM10_METER_READING_NOTE>-FLAGCO = 1.
<MSAM10_METER_READING_NOTE>-TPLNR = 1.
<MSAM10_METER_READING_NOTE>-LFDNR = 1.
<MSAM10_METER_READING_NOTE>-PRIO = 1.
<MSAM10_METER_READING_NOTE>-NOTE = 1.

ENDLOOP.

LOOP AT IT_MSAM10_METER_READING_NOTE INTO WA_MSAM10_METER_READING_NOTE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSAM10_METER_READING_NOTE-PARTNER, sy-vline,
  WA_MSAM10_METER_READING_NOTE-FORMGROUP, sy-vline,
  WA_MSAM10_METER_READING_NOTE-TEXT, sy-vline,
  WA_MSAM10_METER_READING_NOTE-ABLESER, sy-vline,
  WA_MSAM10_METER_READING_NOTE-SPRAS, sy-vline,
  WA_MSAM10_METER_READING_NOTE-ADDTXT1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSAM10_METER_READING_NOTE 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_MSAM10_METER_READING_NOTE 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_MSAM10_METER_READING_NOTE INTO WA_MSAM10_METER_READING_NOTE.


*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 TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_MSAM10_METER_READING_NOTE-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSAM10_METER_READING_NOTE-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_MSAM10_METER_READING_NOTE-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MSAM10_METER_READING_NOTE-SPRAS.
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_MSAM10_METER_READING_NOTE_STR, 
FLAGCO TYPE STRING,
TPLNR TYPE STRING,
LFDNR TYPE STRING,
PRIO TYPE STRING,
NOTE TYPE STRING,
PARTNER TYPE STRING,
FORMGROUP TYPE STRING,
TEXT TYPE STRING,
ABLESER TYPE STRING,
SPRAS TYPE STRING,
ADDTXT1 TYPE STRING,
ADDTXT2 TYPE STRING,
ADDTXT3 TYPE STRING,
ADDTXT4 TYPE STRING,
ADDTXT5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSAM10_METER_READING_NOTE_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_MSAM10_METER_READING_NOTE_STR-FLAGCO sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-TPLNR sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-LFDNR sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-PRIO sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-NOTE sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-PARTNER sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-FORMGROUP sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-TEXT sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-ABLESER sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-SPRAS sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-ADDTXT1 sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-ADDTXT2 sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-ADDTXT3 sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-ADDTXT4 sy-vline 
WA_MSAM10_METER_READING_NOTE_STR-ADDTXT5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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