ABAP Select data from SAP table CNV_ADT_DP_40305_S_POST_A into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNV_ADT_DP_40305_S_POST_A 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_ADT_DP_40305_S_POST_A. 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_ADT_DP_40305_S_POST_A 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_ADT_DP_40305_S_POST_A TYPE STANDARD TABLE OF CNV_ADT_DP_40305_S_POST_A,
      WA_CNV_ADT_DP_40305_S_POST_A TYPE CNV_ADT_DP_40305_S_POST_A,
      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_ADT_DP_40305_S_POST_A> TYPE CNV_ADT_DP_40305_S_POST_A.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNV_ADT_DP_40305_S_POST_A.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNV_ADT_DP_40305_S_POST_A
  INTO TABLE IT_CNV_ADT_DP_40305_S_POST_A.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_ADT_DP_40305_S_POST_A
*  INTO TABLE @DATA(IT_CNV_ADT_DP_40305_S_POST_A2).
*--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_ADT_DP_40305_S_POST_A INDEX 1 INTO DATA(WA_CNV_ADT_DP_40305_S_POST_A2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNV_ADT_DP_40305_S_POST_A ASSIGNING <CNV_ADT_DP_40305_S_POST_A>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_ADT_DP_40305_S_POST_A>-BUKRS = 1.
<CNV_ADT_DP_40305_S_POST_A>-AFABE = 1.
<CNV_ADT_DP_40305_S_POST_A>-SAKNR = 1.
<CNV_ADT_DP_40305_S_POST_A>-TYPE = 1.
<CNV_ADT_DP_40305_S_POST_A>-ANLKL = 1.

ENDLOOP.

LOOP AT IT_CNV_ADT_DP_40305_S_POST_A INTO WA_CNV_ADT_DP_40305_S_POST_A.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_ADT_DP_40305_S_POST_A-NEW_ANLKL, sy-vline,
  WA_CNV_ADT_DP_40305_S_POST_A-KTOGR, sy-vline,
  WA_CNV_ADT_DP_40305_S_POST_A-GSBER, sy-vline,
  WA_CNV_ADT_DP_40305_S_POST_A-KOKRS, sy-vline,
  WA_CNV_ADT_DP_40305_S_POST_A-PRCTR, sy-vline,
  WA_CNV_ADT_DP_40305_S_POST_A-SEGMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_ADT_DP_40305_S_POST_A 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_ADT_DP_40305_S_POST_A 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_ADT_DP_40305_S_POST_A INTO WA_CNV_ADT_DP_40305_S_POST_A.


*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 SAKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-SAKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-SAKNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLKL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-ANLKL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-ANLKL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NEW_ANLKL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-NEW_ANLKL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-NEW_ANLKL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KTOGR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-KTOGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-KTOGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SEGMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-SEGMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-SEGMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CNV_ADT_DP_40305_S_POST_A-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_ADT_DP_40305_S_POST_A-RYEAR.
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_ADT_DP_40305_S_POST_A_STR, 
BUKRS TYPE STRING,
AFABE TYPE STRING,
SAKNR TYPE STRING,
TYPE TYPE STRING,
ANLKL TYPE STRING,
NEW_ANLKL TYPE STRING,
KTOGR TYPE STRING,
GSBER TYPE STRING,
KOKRS TYPE STRING,
PRCTR TYPE STRING,
SEGMENT TYPE STRING,
CURTP TYPE STRING,
LDGRP TYPE STRING,
AMOUNT TYPE STRING,
WAERS TYPE STRING,
BELNR TYPE STRING,
RYEAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_ADT_DP_40305_S_POST_A_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_ADT_DP_40305_S_POST_A_STR-BUKRS sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-AFABE sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-SAKNR sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-TYPE sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-ANLKL sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-NEW_ANLKL sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-KTOGR sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-GSBER sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-KOKRS sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-PRCTR sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-SEGMENT sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-CURTP sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-LDGRP sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-AMOUNT sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-WAERS sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-BELNR sy-vline 
WA_CNV_ADT_DP_40305_S_POST_A_STR-RYEAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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