ABAP Select data from SAP table CNV_20100_TKA01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNV_20100_TKA01 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_20100_TKA01. 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_20100_TKA01 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_20100_TKA01 TYPE STANDARD TABLE OF CNV_20100_TKA01,
      WA_CNV_20100_TKA01 TYPE CNV_20100_TKA01,
      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_20100_TKA01> TYPE CNV_20100_TKA01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNV_20100_TKA01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNV_20100_TKA01
  INTO TABLE IT_CNV_20100_TKA01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_20100_TKA01
*  INTO TABLE @DATA(IT_CNV_20100_TKA012).
*--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_20100_TKA01 INDEX 1 INTO DATA(WA_CNV_20100_TKA012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNV_20100_TKA01 ASSIGNING <CNV_20100_TKA01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_20100_TKA01>-MANDT = 1.
<CNV_20100_TKA01>-PACKID = 1.
<CNV_20100_TKA01>-KOKRS = 1.
<CNV_20100_TKA01>-BEZEI = 1.
<CNV_20100_TKA01>-WAERS = 1.

ENDLOOP.

LOOP AT IT_CNV_20100_TKA01 INTO WA_CNV_20100_TKA01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_20100_TKA01-KTOPL, sy-vline,
  WA_CNV_20100_TKA01-LMONA, sy-vline,
  WA_CNV_20100_TKA01-KOKFI, sy-vline,
  WA_CNV_20100_TKA01-KHINR, sy-vline,
  WA_CNV_20100_TKA01-KOMP1, sy-vline,
  WA_CNV_20100_TKA01-KOMP0, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_20100_TKA01 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_20100_TKA01 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_20100_TKA01 INTO WA_CNV_20100_TKA01.


*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 DPRCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_20100_TKA01-DPRCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_20100_TKA01-DPRCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PCLDG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_20100_TKA01-PCLDG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_20100_TKA01-PCLDG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSYSTEM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_20100_TKA01-LOGSYSTEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_20100_TKA01-LOGSYSTEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ALEMT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_20100_TKA01-ALEMT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_20100_TKA01-ALEMT.
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_CNV_20100_TKA01_STR, 
MANDT TYPE STRING,
PACKID TYPE STRING,
KOKRS TYPE STRING,
BEZEI TYPE STRING,
WAERS TYPE STRING,
KTOPL TYPE STRING,
LMONA TYPE STRING,
KOKFI TYPE STRING,
KHINR TYPE STRING,
KOMP1 TYPE STRING,
KOMP0 TYPE STRING,
KOMP2 TYPE STRING,
ERKRS TYPE STRING,
DPRCT TYPE STRING,
PHINR TYPE STRING,
PCLDG TYPE STRING,
PCBEL TYPE STRING,
XWBUK TYPE STRING,
BPHINR TYPE STRING,
KSTAR_FIN TYPE STRING,
KSTAR_FID TYPE STRING,
PCACUR TYPE STRING,
PCACURTP TYPE STRING,
PCATRCUR TYPE STRING,
CTYP TYPE STRING,
RCLAC TYPE STRING,
LOGSYSTEM TYPE STRING,
BLART TYPE STRING,
FIKRS TYPE STRING,
RCL_PRIMAC TYPE STRING,
ALEMT TYPE STRING,
PCA_VALU TYPE STRING,
CVPROF TYPE STRING,
CVACT TYPE STRING,
VNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_20100_TKA01_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_20100_TKA01_STR-MANDT sy-vline 
WA_CNV_20100_TKA01_STR-PACKID sy-vline 
WA_CNV_20100_TKA01_STR-KOKRS sy-vline 
WA_CNV_20100_TKA01_STR-BEZEI sy-vline 
WA_CNV_20100_TKA01_STR-WAERS sy-vline 
WA_CNV_20100_TKA01_STR-KTOPL sy-vline 
WA_CNV_20100_TKA01_STR-LMONA sy-vline 
WA_CNV_20100_TKA01_STR-KOKFI sy-vline 
WA_CNV_20100_TKA01_STR-KHINR sy-vline 
WA_CNV_20100_TKA01_STR-KOMP1 sy-vline 
WA_CNV_20100_TKA01_STR-KOMP0 sy-vline 
WA_CNV_20100_TKA01_STR-KOMP2 sy-vline 
WA_CNV_20100_TKA01_STR-ERKRS sy-vline 
WA_CNV_20100_TKA01_STR-DPRCT sy-vline 
WA_CNV_20100_TKA01_STR-PHINR sy-vline 
WA_CNV_20100_TKA01_STR-PCLDG sy-vline 
WA_CNV_20100_TKA01_STR-PCBEL sy-vline 
WA_CNV_20100_TKA01_STR-XWBUK sy-vline 
WA_CNV_20100_TKA01_STR-BPHINR sy-vline 
WA_CNV_20100_TKA01_STR-KSTAR_FIN sy-vline 
WA_CNV_20100_TKA01_STR-KSTAR_FID sy-vline 
WA_CNV_20100_TKA01_STR-PCACUR sy-vline 
WA_CNV_20100_TKA01_STR-PCACURTP sy-vline 
WA_CNV_20100_TKA01_STR-PCATRCUR sy-vline 
WA_CNV_20100_TKA01_STR-CTYP sy-vline 
WA_CNV_20100_TKA01_STR-RCLAC sy-vline 
WA_CNV_20100_TKA01_STR-LOGSYSTEM sy-vline 
WA_CNV_20100_TKA01_STR-BLART sy-vline 
WA_CNV_20100_TKA01_STR-FIKRS sy-vline 
WA_CNV_20100_TKA01_STR-RCL_PRIMAC sy-vline 
WA_CNV_20100_TKA01_STR-ALEMT sy-vline 
WA_CNV_20100_TKA01_STR-PCA_VALU sy-vline 
WA_CNV_20100_TKA01_STR-CVPROF sy-vline 
WA_CNV_20100_TKA01_STR-CVACT sy-vline 
WA_CNV_20100_TKA01_STR-VNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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