ABAP Select data from SAP table CNV_BASIS_GENER_CONTROL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_BASIS_GENER_CONTROL
*  INTO TABLE @DATA(IT_CNV_BASIS_GENER_CONTROL2).
*--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_CNV_BASIS_GENER_CONTROL INDEX 1 INTO DATA(WA_CNV_BASIS_GENER_CONTROL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_BASIS_GENER_CONTROL>-PACKID = 1.
<CNV_BASIS_GENER_CONTROL>-PHASE = 1.
<CNV_BASIS_GENER_CONTROL>-TABLE = 1.
<CNV_BASIS_GENER_CONTROL>-NAME = 1.
<CNV_BASIS_GENER_CONTROL>-STATENAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_BASIS_GENER_CONTROL-STAGINGTABNAME, sy-vline,
  WA_CNV_BASIS_GENER_CONTROL-VIEWNAME, sy-vline,
  WA_CNV_BASIS_GENER_CONTROL-ACCESSNAME, sy-vline,
  WA_CNV_BASIS_GENER_CONTROL-SCENARIO, sy-vline,
  WA_CNV_BASIS_GENER_CONTROL-CLIENTDEPEND, sy-vline,
  WA_CNV_BASIS_GENER_CONTROL-TABID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_BASIS_GENER_CONTROL 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_CNV_BASIS_GENER_CONTROL 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_CNV_BASIS_GENER_CONTROL INTO WA_CNV_BASIS_GENER_CONTROL.


*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_CNV_BASIS_GENER_CONTROL_STR, 
PACKID TYPE STRING,
PHASE TYPE STRING,
TABLE TYPE STRING,
NAME TYPE STRING,
STATENAME TYPE STRING,
STAGINGTABNAME TYPE STRING,
VIEWNAME TYPE STRING,
ACCESSNAME TYPE STRING,
SCENARIO TYPE STRING,
CLIENTDEPEND TYPE STRING,
TABID TYPE STRING,
UPDTYPE TYPE STRING,
SEQNUM TYPE STRING,
VARIABLES TYPE STRING,
ORIGTAB TYPE STRING,
ORIGTAB_COPY TYPE STRING,
ORIGROW TYPE STRING,
CONVTAB TYPE STRING,
CONVROW TYPE STRING,
CHANGED TYPE STRING,
LOGGER TYPE STRING,
COUNTS TYPE STRING,
CLUSTER TYPE STRING,
COMMIT TYPE STRING,
TOTAL TYPE STRING,
READ TYPE STRING,
CHANGED TYPE STRING,
SELECT TYPE STRING,
LINES TYPE STRING,
LINES_SELECT TYPE STRING,
ORIGROW_APPLTAB TYPE STRING,
CONVROW_APPLTAB TYPE STRING,
ORIGROW_TYPE TYPE STRING,
ORIGTAB_TYPE TYPE STRING,
DUPLSTORE TYPE STRING,
RESOLVE_DUPLICATES TYPE STRING,
AGGREGATE TYPE STRING,
RESOLVE_PRIORITIES TYPE STRING,
ORGFORMS TYPE STRING,
ITRFORMS TYPE STRING,
PROGNAME TYPE STRING,
SUBTABLES TYPE STRING,
NEXTPROGNAME TYPE STRING,
DUMMYCLIENT TYPE STRING,
TASKID TYPE STRING,
RERUN TYPE STRING,
PRECURSOR TYPE STRING,
PRETABNAME TYPE STRING,
RUNMODE TYPE STRING,
RERUNARG TYPE STRING,
PROGTYPE TYPE STRING,
GENTYPE TYPE STRING,
LETTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_BASIS_GENER_CONTROL_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_CNV_BASIS_GENER_CONTROL_STR-PACKID sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-PHASE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-TABLE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-NAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-STATENAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-STAGINGTABNAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-VIEWNAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ACCESSNAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-SCENARIO sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-CLIENTDEPEND sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-TABID sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-UPDTYPE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-SEQNUM sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-VARIABLES sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ORIGTAB sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ORIGTAB_COPY sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ORIGROW sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-CONVTAB sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-CONVROW sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-CHANGED sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-LOGGER sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-COUNTS sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-CLUSTER sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-COMMIT sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-TOTAL sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-READ sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-CHANGED sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-SELECT sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-LINES sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-LINES_SELECT sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ORIGROW_APPLTAB sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-CONVROW_APPLTAB sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ORIGROW_TYPE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ORIGTAB_TYPE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-DUPLSTORE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-RESOLVE_DUPLICATES sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-AGGREGATE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-RESOLVE_PRIORITIES sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ORGFORMS sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-ITRFORMS sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-PROGNAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-SUBTABLES sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-NEXTPROGNAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-DUMMYCLIENT sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-TASKID sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-RERUN sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-PRECURSOR sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-PRETABNAME sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-RUNMODE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-RERUNARG sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-PROGTYPE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-GENTYPE sy-vline 
WA_CNV_BASIS_GENER_CONTROL_STR-LETTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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