ABAP Select data from SAP table BAPICLCHDF into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPICLCHDF 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 BAPICLCHDF. 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 BAPICLCHDF 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_BAPICLCHDF TYPE STANDARD TABLE OF BAPICLCHDF,
      WA_BAPICLCHDF TYPE BAPICLCHDF,
      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: <BAPICLCHDF> TYPE BAPICLCHDF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPICLCHDF
*  INTO TABLE @DATA(IT_BAPICLCHDF2).
*--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_BAPICLCHDF INDEX 1 INTO DATA(WA_BAPICLCHDF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPICLCHDF>-INT_CHAR = 1.
<BAPICLCHDF>-INT_CNTR = 1.
<BAPICLCHDF>-NAME_CHAR = 1.
<BAPICLCHDF>-CHAR_ID = 1.
<BAPICLCHDF>-DATA_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPICLCHDF-NUMBER_DIG, sy-vline,
  WA_BAPICLCHDF-NUMBER_DEC, sy-vline,
  WA_BAPICLCHDF-SIGN, sy-vline,
  WA_BAPICLCHDF-TEMPLATE, sy-vline,
  WA_BAPICLCHDF-CASE_SENSI, sy-vline,
  WA_BAPICLCHDF-CONVERSION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPICLCHDF 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_BAPICLCHDF 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_BAPICLCHDF INTO WA_BAPICLCHDF.


*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 ATINN, internal->external for field INT_CHAR
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_BAPICLCHDF-INT_CHAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPICLCHDF-INT_CHAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEAS_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPICLCHDF-MEAS_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPICLCHDF-MEAS_UNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field DOC_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPICLCHDF-DOC_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPICLCHDF-DOC_NUMBER.
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_BAPICLCHDF_STR, 
INT_CHAR TYPE STRING,
INT_CNTR TYPE STRING,
NAME_CHAR TYPE STRING,
CHAR_ID TYPE STRING,
DATA_TYPE TYPE STRING,
NUMBER_DIG TYPE STRING,
NUMBER_DEC TYPE STRING,
SIGN TYPE STRING,
TEMPLATE TYPE STRING,
CASE_SENSI TYPE STRING,
CONVERSION TYPE STRING,
AGGR_CHAR TYPE STRING,
BAL_CHAR TYPE STRING,
CHAR_GROUP TYPE STRING,
ENTRY_OBLI TYPE STRING,
SINGLE_VAL TYPE STRING,
CMULTILING TYPE STRING,
VMULTILING TYPE STRING,
MEAS_UNIT TYPE STRING,
MEASUN_ISO TYPE STRING,
EXPONENT TYPE STRING,
ENTRY_POSS TYPE STRING,
RESTRICT TYPE STRING,
INT_ALLOWD TYPE STRING,
ENTRY_REQD TYPE STRING,
ADD_VAL TYPE STRING,
OBJECT_TAB TYPE STRING,
TABLE_FIEL TYPE STRING,
FIELD_NAME TYPE STRING,
CHECK_TAB TYPE STRING,
CHECK_PROG TYPE STRING,
FUNCTION TYPE STRING,
DISP_VALS TYPE STRING,
UNFORMATTD TYPE STRING,
EXPL_HIER TYPE STRING,
EXP_TYPE TYPE STRING,
FORMATTED TYPE STRING,
W_TEMPLATE TYPE STRING,
CREATED_BY TYPE STRING,
CREAT_DATE TYPE STRING,
CHANGED_BY TYPE STRING,
CH_ON TYPE STRING,
TABALLOC TYPE STRING,
R_JUSTIF TYPE STRING,
STATUS TYPE STRING,
SET_VALUES TYPE STRING,
SET_ASSNG TYPE STRING,
VALID_FROM TYPE STRING,
TECHSTATUS TYPE STRING,
CHANGE_NO TYPE STRING,
DEL_IND TYPE STRING,
SEQUENCE TYPE STRING,
DOC_TYPE TYPE STRING,
DOC_NUMBER TYPE STRING,
DOC_VERSIO TYPE STRING,
DOC_PART TYPE STRING,
ALLOC_NO TYPE STRING,
NO_INPUT TYPE STRING,
HIDDEN TYPE STRING,
PLANT TYPE STRING,
CAT_TYPE TYPE STRING,
SLCTD_SET TYPE STRING,
ONLY_NODE TYPE STRING,
NODES_SEL TYPE STRING,
INTCLASSNR TYPE STRING,
TOL_ALLOWD TYPE STRING,
IND_ASSIGN TYPE STRING,
IND_PLAN TYPE STRING,
AUTH_GROUP TYPE STRING,
TEMPLATE_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPICLCHDF_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_BAPICLCHDF_STR-INT_CHAR sy-vline 
WA_BAPICLCHDF_STR-INT_CNTR sy-vline 
WA_BAPICLCHDF_STR-NAME_CHAR sy-vline 
WA_BAPICLCHDF_STR-CHAR_ID sy-vline 
WA_BAPICLCHDF_STR-DATA_TYPE sy-vline 
WA_BAPICLCHDF_STR-NUMBER_DIG sy-vline 
WA_BAPICLCHDF_STR-NUMBER_DEC sy-vline 
WA_BAPICLCHDF_STR-SIGN sy-vline 
WA_BAPICLCHDF_STR-TEMPLATE sy-vline 
WA_BAPICLCHDF_STR-CASE_SENSI sy-vline 
WA_BAPICLCHDF_STR-CONVERSION sy-vline 
WA_BAPICLCHDF_STR-AGGR_CHAR sy-vline 
WA_BAPICLCHDF_STR-BAL_CHAR sy-vline 
WA_BAPICLCHDF_STR-CHAR_GROUP sy-vline 
WA_BAPICLCHDF_STR-ENTRY_OBLI sy-vline 
WA_BAPICLCHDF_STR-SINGLE_VAL sy-vline 
WA_BAPICLCHDF_STR-CMULTILING sy-vline 
WA_BAPICLCHDF_STR-VMULTILING sy-vline 
WA_BAPICLCHDF_STR-MEAS_UNIT sy-vline 
WA_BAPICLCHDF_STR-MEASUN_ISO sy-vline 
WA_BAPICLCHDF_STR-EXPONENT sy-vline 
WA_BAPICLCHDF_STR-ENTRY_POSS sy-vline 
WA_BAPICLCHDF_STR-RESTRICT sy-vline 
WA_BAPICLCHDF_STR-INT_ALLOWD sy-vline 
WA_BAPICLCHDF_STR-ENTRY_REQD sy-vline 
WA_BAPICLCHDF_STR-ADD_VAL sy-vline 
WA_BAPICLCHDF_STR-OBJECT_TAB sy-vline 
WA_BAPICLCHDF_STR-TABLE_FIEL sy-vline 
WA_BAPICLCHDF_STR-FIELD_NAME sy-vline 
WA_BAPICLCHDF_STR-CHECK_TAB sy-vline 
WA_BAPICLCHDF_STR-CHECK_PROG sy-vline 
WA_BAPICLCHDF_STR-FUNCTION sy-vline 
WA_BAPICLCHDF_STR-DISP_VALS sy-vline 
WA_BAPICLCHDF_STR-UNFORMATTD sy-vline 
WA_BAPICLCHDF_STR-EXPL_HIER sy-vline 
WA_BAPICLCHDF_STR-EXP_TYPE sy-vline 
WA_BAPICLCHDF_STR-FORMATTED sy-vline 
WA_BAPICLCHDF_STR-W_TEMPLATE sy-vline 
WA_BAPICLCHDF_STR-CREATED_BY sy-vline 
WA_BAPICLCHDF_STR-CREAT_DATE sy-vline 
WA_BAPICLCHDF_STR-CHANGED_BY sy-vline 
WA_BAPICLCHDF_STR-CH_ON sy-vline 
WA_BAPICLCHDF_STR-TABALLOC sy-vline 
WA_BAPICLCHDF_STR-R_JUSTIF sy-vline 
WA_BAPICLCHDF_STR-STATUS sy-vline 
WA_BAPICLCHDF_STR-SET_VALUES sy-vline 
WA_BAPICLCHDF_STR-SET_ASSNG sy-vline 
WA_BAPICLCHDF_STR-VALID_FROM sy-vline 
WA_BAPICLCHDF_STR-TECHSTATUS sy-vline 
WA_BAPICLCHDF_STR-CHANGE_NO sy-vline 
WA_BAPICLCHDF_STR-DEL_IND sy-vline 
WA_BAPICLCHDF_STR-SEQUENCE sy-vline 
WA_BAPICLCHDF_STR-DOC_TYPE sy-vline 
WA_BAPICLCHDF_STR-DOC_NUMBER sy-vline 
WA_BAPICLCHDF_STR-DOC_VERSIO sy-vline 
WA_BAPICLCHDF_STR-DOC_PART sy-vline 
WA_BAPICLCHDF_STR-ALLOC_NO sy-vline 
WA_BAPICLCHDF_STR-NO_INPUT sy-vline 
WA_BAPICLCHDF_STR-HIDDEN sy-vline 
WA_BAPICLCHDF_STR-PLANT sy-vline 
WA_BAPICLCHDF_STR-CAT_TYPE sy-vline 
WA_BAPICLCHDF_STR-SLCTD_SET sy-vline 
WA_BAPICLCHDF_STR-ONLY_NODE sy-vline 
WA_BAPICLCHDF_STR-NODES_SEL sy-vline 
WA_BAPICLCHDF_STR-INTCLASSNR sy-vline 
WA_BAPICLCHDF_STR-TOL_ALLOWD sy-vline 
WA_BAPICLCHDF_STR-IND_ASSIGN sy-vline 
WA_BAPICLCHDF_STR-IND_PLAN sy-vline 
WA_BAPICLCHDF_STR-AUTH_GROUP sy-vline 
WA_BAPICLCHDF_STR-TEMPLATE_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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