ABAP Select data from SAP table CNVCMIS_A_20_WL 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 CNVCMIS_A_20_WL 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 CNVCMIS_A_20_WL. 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 CNVCMIS_A_20_WL 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_CNVCMIS_A_20_WL TYPE STANDARD TABLE OF CNVCMIS_A_20_WL,
      WA_CNVCMIS_A_20_WL TYPE CNVCMIS_A_20_WL,
      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: <CNVCMIS_A_20_WL> TYPE CNVCMIS_A_20_WL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNVCMIS_A_20_WL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNVCMIS_A_20_WL
  INTO TABLE IT_CNVCMIS_A_20_WL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVCMIS_A_20_WL
*  INTO TABLE @DATA(IT_CNVCMIS_A_20_WL2).
*--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_CNVCMIS_A_20_WL INDEX 1 INTO DATA(WA_CNVCMIS_A_20_WL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNVCMIS_A_20_WL ASSIGNING <CNVCMIS_A_20_WL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVCMIS_A_20_WL>-MANDT = 1.
<CNVCMIS_A_20_WL>-PACKID = 1.
<CNVCMIS_A_20_WL>-VERSION = 1.
<CNVCMIS_A_20_WL>-WL_GLOBAL = 1.
<CNVCMIS_A_20_WL>-TABNAME = 1.

ENDLOOP.

LOOP AT IT_CNVCMIS_A_20_WL INTO WA_CNVCMIS_A_20_WL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVCMIS_A_20_WL-DESTINATION_ID, sy-vline,
  WA_CNVCMIS_A_20_WL-TABCLASS, sy-vline,
  WA_CNVCMIS_A_20_WL-SQLTAB, sy-vline,
  WA_CNVCMIS_A_20_WL-APP_COMPONENT, sy-vline,
  WA_CNVCMIS_A_20_WL-AVAILABLE, sy-vline,
  WA_CNVCMIS_A_20_WL-SKIP_CHK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVCMIS_A_20_WL 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_CNVCMIS_A_20_WL 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_CNVCMIS_A_20_WL INTO WA_CNVCMIS_A_20_WL.


*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_CNVCMIS_A_20_WL_STR, 
MANDT TYPE STRING,
PACKID TYPE STRING,
VERSION TYPE STRING,
WL_GLOBAL TYPE STRING,
TABNAME TYPE STRING,
DESTINATION_ID TYPE STRING,
TABCLASS TYPE STRING,
SQLTAB TYPE STRING,
APP_COMPONENT TYPE STRING,
AVAILABLE TYPE STRING,
SKIP_CHK TYPE STRING,
COMPARABLE TYPE STRING,
STATE TYPE STRING,
CHANGED TYPE STRING,
CR_MODE TYPE STRING,
TOTAL TYPE STRING,
IDENTICAL TYPE STRING,
DISCRETE TYPE STRING,
DIFFERENT TYPE STRING,
CHGUSER TYPE STRING,
CHGDATE TYPE STRING,
CHGTIME TYPE STRING,
ORIG_STATE TYPE STRING,
TEXT TYPE STRING,
PROCESSOR TYPE STRING,
STATUS_ICON TYPE STRING,
ANALYSIS_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVCMIS_A_20_WL_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_CNVCMIS_A_20_WL_STR-MANDT sy-vline 
WA_CNVCMIS_A_20_WL_STR-PACKID sy-vline 
WA_CNVCMIS_A_20_WL_STR-VERSION sy-vline 
WA_CNVCMIS_A_20_WL_STR-WL_GLOBAL sy-vline 
WA_CNVCMIS_A_20_WL_STR-TABNAME sy-vline 
WA_CNVCMIS_A_20_WL_STR-DESTINATION_ID sy-vline 
WA_CNVCMIS_A_20_WL_STR-TABCLASS sy-vline 
WA_CNVCMIS_A_20_WL_STR-SQLTAB sy-vline 
WA_CNVCMIS_A_20_WL_STR-APP_COMPONENT sy-vline 
WA_CNVCMIS_A_20_WL_STR-AVAILABLE sy-vline 
WA_CNVCMIS_A_20_WL_STR-SKIP_CHK sy-vline 
WA_CNVCMIS_A_20_WL_STR-COMPARABLE sy-vline 
WA_CNVCMIS_A_20_WL_STR-STATE sy-vline 
WA_CNVCMIS_A_20_WL_STR-CHANGED sy-vline 
WA_CNVCMIS_A_20_WL_STR-CR_MODE sy-vline 
WA_CNVCMIS_A_20_WL_STR-TOTAL sy-vline 
WA_CNVCMIS_A_20_WL_STR-IDENTICAL sy-vline 
WA_CNVCMIS_A_20_WL_STR-DISCRETE sy-vline 
WA_CNVCMIS_A_20_WL_STR-DIFFERENT sy-vline 
WA_CNVCMIS_A_20_WL_STR-CHGUSER sy-vline 
WA_CNVCMIS_A_20_WL_STR-CHGDATE sy-vline 
WA_CNVCMIS_A_20_WL_STR-CHGTIME sy-vline 
WA_CNVCMIS_A_20_WL_STR-ORIG_STATE sy-vline 
WA_CNVCMIS_A_20_WL_STR-TEXT sy-vline 
WA_CNVCMIS_A_20_WL_STR-PROCESSOR sy-vline 
WA_CNVCMIS_A_20_WL_STR-STATUS_ICON sy-vline 
WA_CNVCMIS_A_20_WL_STR-ANALYSIS_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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