ABAP Select data from SAP table CNVMBTPACK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVMBTPACK
*  INTO TABLE @DATA(IT_CNVMBTPACK2).
*--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_CNVMBTPACK INDEX 1 INTO DATA(WA_CNVMBTPACK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVMBTPACK>-CLIENT = 1.
<CNVMBTPACK>-PACKID = 1.
<CNVMBTPACK>-PACK_TYPE = 1.
<CNVMBTPACK>-CREATION_TIME = 1.
<CNVMBTPACK>-CREATION_USER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVMBTPACK-RELEASE_MIN, sy-vline,
  WA_CNVMBTPACK-RELEASE_MAX, sy-vline,
  WA_CNVMBTPACK-SCENARIO, sy-vline,
  WA_CNVMBTPACK-VERSION, sy-vline,
  WA_CNVMBTPACK-SUBPROJECT, sy-vline,
  WA_CNVMBTPACK-ACCESSPLANID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVMBTPACK 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_CNVMBTPACK 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_CNVMBTPACK INTO WA_CNVMBTPACK.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CNVMBTPACK_STR, 
CLIENT TYPE STRING,
PACKID TYPE STRING,
PACK_TYPE TYPE STRING,
CREATION_TIME TYPE STRING,
CREATION_USER TYPE STRING,
RELEASE_MIN TYPE STRING,
RELEASE_MAX TYPE STRING,
SCENARIO TYPE STRING,
VERSION TYPE STRING,
SUBPROJECT TYPE STRING,
ACCESSPLANID TYPE STRING,
RSFLAG1 TYPE STRING,
RSFLAG2 TYPE STRING,
RSFLAG3 TYPE STRING,
RSFLAG4 TYPE STRING,
RSFLAG5 TYPE STRING,
DEACTUSER TYPE STRING,
DEACTTIME TYPE STRING,
CUSER TYPE STRING,
CTIME TYPE STRING,
EXT_PACK TYPE STRING,
MIFV_ID TYPE STRING,
COT_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVMBTPACK_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_CNVMBTPACK_STR-CLIENT sy-vline 
WA_CNVMBTPACK_STR-PACKID sy-vline 
WA_CNVMBTPACK_STR-PACK_TYPE sy-vline 
WA_CNVMBTPACK_STR-CREATION_TIME sy-vline 
WA_CNVMBTPACK_STR-CREATION_USER sy-vline 
WA_CNVMBTPACK_STR-RELEASE_MIN sy-vline 
WA_CNVMBTPACK_STR-RELEASE_MAX sy-vline 
WA_CNVMBTPACK_STR-SCENARIO sy-vline 
WA_CNVMBTPACK_STR-VERSION sy-vline 
WA_CNVMBTPACK_STR-SUBPROJECT sy-vline 
WA_CNVMBTPACK_STR-ACCESSPLANID sy-vline 
WA_CNVMBTPACK_STR-RSFLAG1 sy-vline 
WA_CNVMBTPACK_STR-RSFLAG2 sy-vline 
WA_CNVMBTPACK_STR-RSFLAG3 sy-vline 
WA_CNVMBTPACK_STR-RSFLAG4 sy-vline 
WA_CNVMBTPACK_STR-RSFLAG5 sy-vline 
WA_CNVMBTPACK_STR-DEACTUSER sy-vline 
WA_CNVMBTPACK_STR-DEACTTIME sy-vline 
WA_CNVMBTPACK_STR-CUSER sy-vline 
WA_CNVMBTPACK_STR-CTIME sy-vline 
WA_CNVMBTPACK_STR-EXT_PACK sy-vline 
WA_CNVMBTPACK_STR-MIFV_ID sy-vline 
WA_CNVMBTPACK_STR-COT_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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