ABAP Select data from SAP table CNV_BASIS_GENER_CFG_FIELD 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_CFG_FIELD 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_CFG_FIELD. 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_CFG_FIELD 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_CFG_FIELD TYPE STANDARD TABLE OF CNV_BASIS_GENER_CFG_FIELD,
      WA_CNV_BASIS_GENER_CFG_FIELD TYPE CNV_BASIS_GENER_CFG_FIELD,
      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_CFG_FIELD> TYPE CNV_BASIS_GENER_CFG_FIELD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_BASIS_GENER_CFG_FIELD
*  INTO TABLE @DATA(IT_CNV_BASIS_GENER_CFG_FIELD2).
*--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_CFG_FIELD INDEX 1 INTO DATA(WA_CNV_BASIS_GENER_CFG_FIELD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_BASIS_GENER_CFG_FIELD>-NAME = 1.
<CNV_BASIS_GENER_CFG_FIELD>-DDICNAME = 1.
<CNV_BASIS_GENER_CFG_FIELD>-EXPANDEDNAME = 1.
<CNV_BASIS_GENER_CFG_FIELD>-ORGDEP = 1.
<CNV_BASIS_GENER_CFG_FIELD>-DTGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_BASIS_GENER_CFG_FIELD-DTEVALSTYLE, sy-vline,
  WA_CNV_BASIS_GENER_CFG_FIELD-DTOBJS, sy-vline,
  WA_CNV_BASIS_GENER_CFG_FIELD-TABNUM, sy-vline,
  WA_CNV_BASIS_GENER_CFG_FIELD-ITREVALSTYLE, sy-vline,
  WA_CNV_BASIS_GENER_CFG_FIELD-HANDLEINITIAL, sy-vline,
  WA_CNV_BASIS_GENER_CFG_FIELD-CONFDETECT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_BASIS_GENER_CFG_FIELD 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_CFG_FIELD 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_CFG_FIELD INTO WA_CNV_BASIS_GENER_CFG_FIELD.


*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_CFG_FIELD_STR, 
NAME TYPE STRING,
DDICNAME TYPE STRING,
EXPANDEDNAME TYPE STRING,
ORGDEP TYPE STRING,
DTGROUP TYPE STRING,
DTEVALSTYLE TYPE STRING,
DTOBJS TYPE STRING,
TABNUM TYPE STRING,
ITREVALSTYLE TYPE STRING,
HANDLEINITIAL TYPE STRING,
CONFDETECT TYPE STRING,
SEQNUM TYPE STRING,
SOURCEPACKID TYPE STRING,
READONLY TYPE STRING,
MCPOS TYPE STRING,
CONVROUTINE TYPE STRING,
NAME TYPE STRING,
TYPE TYPE STRING,
PROGRAM TYPE STRING,
PARAMETERS TYPE STRING,
AGGRROUTINE TYPE STRING,
NAME TYPE STRING,
TYPE TYPE STRING,
PROGRAM TYPE STRING,
PARAMETERS TYPE STRING,
NONTRFIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_BASIS_GENER_CFG_FIELD_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_CFG_FIELD_STR-NAME sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-DDICNAME sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-EXPANDEDNAME sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-ORGDEP sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-DTGROUP sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-DTEVALSTYLE sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-DTOBJS sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-TABNUM sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-ITREVALSTYLE sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-HANDLEINITIAL sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-CONFDETECT sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-SEQNUM sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-SOURCEPACKID sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-READONLY sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-MCPOS sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-CONVROUTINE sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-NAME sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-TYPE sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-PROGRAM sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-PARAMETERS sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-AGGRROUTINE sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-NAME sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-TYPE sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-PROGRAM sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-PARAMETERS sy-vline 
WA_CNV_BASIS_GENER_CFG_FIELD_STR-NONTRFIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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