ABAP Select data from SAP table PLASTMSMTDOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PLASTMSMTDOC
*  INTO TABLE @DATA(IT_PLASTMSMTDOC2).
*--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_PLASTMSMTDOC INDEX 1 INTO DATA(WA_PLASTMSMTDOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PLASTMSMTDOC>-MANDT = 1.
<PLASTMSMTDOC>-MEASUREMENTDOCUMENT = 1.
<PLASTMSMTDOC>-MEASURINGPOINT = 1.
<PLASTMSMTDOC>-MSMTRDNGDATE = 1.
<PLASTMSMTDOC>-MSMTRDNGTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PLASTMSMTDOC-MEASUREMENTCOUNTERREADING, sy-vline,
  WA_PLASTMSMTDOC-MSMTCNTRRDNGISENTERED, sy-vline,
  WA_PLASTMSMTDOC-MEASUREMENTREADING, sy-vline,
  WA_PLASTMSMTDOC-MSMTRDNGISENTERED, sy-vline,
  WA_PLASTMSMTDOC-MEASUREMENTREADINGENTRYUOM, sy-vline,
  WA_PLASTMSMTDOC-MSMTVALUATIONCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PLASTMSMTDOC 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_PLASTMSMTDOC 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_PLASTMSMTDOC INTO WA_PLASTMSMTDOC.


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

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

*Conversion exit CUNIT, internal->external for field MEASUREMENTREADINGENTRYUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PLASTMSMTDOC-MEASUREMENTREADINGENTRYUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PLASTMSMTDOC-MEASUREMENTREADINGENTRYUOM.
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_PLASTMSMTDOC_STR, 
MANDT TYPE STRING,
MEASUREMENTDOCUMENT TYPE STRING,
MEASURINGPOINT TYPE STRING,
MSMTRDNGDATE TYPE STRING,
MSMTRDNGTIME TYPE STRING,
MEASUREMENTCOUNTERREADING TYPE STRING,
MSMTCNTRRDNGISENTERED TYPE STRING,
MEASUREMENTREADING TYPE STRING,
MSMTRDNGISENTERED TYPE STRING,
MEASUREMENTREADINGENTRYUOM TYPE STRING,
MSMTVALUATIONCODE TYPE STRING,
MEASUREMENTDOCUMENTCATALOGTYPE TYPE STRING,
MEASUREMENTDOCUMENTCODEGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PLASTMSMTDOC_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_PLASTMSMTDOC_STR-MANDT sy-vline 
WA_PLASTMSMTDOC_STR-MEASUREMENTDOCUMENT sy-vline 
WA_PLASTMSMTDOC_STR-MEASURINGPOINT sy-vline 
WA_PLASTMSMTDOC_STR-MSMTRDNGDATE sy-vline 
WA_PLASTMSMTDOC_STR-MSMTRDNGTIME sy-vline 
WA_PLASTMSMTDOC_STR-MEASUREMENTCOUNTERREADING sy-vline 
WA_PLASTMSMTDOC_STR-MSMTCNTRRDNGISENTERED sy-vline 
WA_PLASTMSMTDOC_STR-MEASUREMENTREADING sy-vline 
WA_PLASTMSMTDOC_STR-MSMTRDNGISENTERED sy-vline 
WA_PLASTMSMTDOC_STR-MEASUREMENTREADINGENTRYUOM sy-vline 
WA_PLASTMSMTDOC_STR-MSMTVALUATIONCODE sy-vline 
WA_PLASTMSMTDOC_STR-MEASUREMENTDOCUMENTCATALOGTYPE sy-vline 
WA_PLASTMSMTDOC_STR-MEASUREMENTDOCUMENTCODEGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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