ABAP Select data from SAP table BAPICLALVA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPICLALVA
*  INTO TABLE @DATA(IT_BAPICLALVA2).
*--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_BAPICLALVA INDEX 1 INTO DATA(WA_BAPICLALVA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPICLALVA>-OBJECT_KEY = 1.
<BAPICLALVA>-NAME_CHAR = 1.
<BAPICLALVA>-INT_CHAR = 1.
<BAPICLALVA>-COUNTER = 1.
<BAPICLALVA>-OBJ_CLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPICLALVA-CLASS_TYPE, sy-vline,
  WA_BAPICLALVA-INT_CNTR, sy-vline,
  WA_BAPICLALVA-CHAR_VALUE, sy-vline,
  WA_BAPICLALVA-NUM_VAL_FM, sy-vline,
  WA_BAPICLALVA-MEAS_UNIT1, sy-vline,
  WA_BAPICLALVA-MUNIT1_ISO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPICLALVA 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_BAPICLALVA 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_BAPICLALVA INTO WA_BAPICLALVA.


*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_BAPICLALVA-INT_CHAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPICLALVA-INT_CHAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEAS_UNIT1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPICLALVA-MEAS_UNIT1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPICLALVA-MEAS_UNIT1.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ATINN, internal->external for field USR_I_CHAR
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_BAPICLALVA-USR_I_CHAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPICLALVA-USR_I_CHAR.
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_BAPICLALVA_STR, 
OBJECT_KEY TYPE STRING,
NAME_CHAR TYPE STRING,
INT_CHAR TYPE STRING,
COUNTER TYPE STRING,
OBJ_CLASS TYPE STRING,
CLASS_TYPE TYPE STRING,
INT_CNTR TYPE STRING,
CHAR_VALUE TYPE STRING,
NUM_VAL_FM TYPE STRING,
MEAS_UNIT1 TYPE STRING,
MUNIT1_ISO TYPE STRING,
NUM_VAL_TO TYPE STRING,
MEAS_UNIT TYPE STRING,
MUNIT2_ISO TYPE STRING,
VALUE_CODE TYPE STRING,
TOLER_FROM TYPE STRING,
TOLER_TO TYPE STRING,
PERCENTAGE TYPE STRING,
OPER_INC TYPE STRING,
AUTHOR TYPE STRING,
CHANGE_NO TYPE STRING,
VALID_FROM TYPE STRING,
DEL_IND TYPE STRING,
USR_I_CHAR TYPE STRING,
INSTANCE TYPE STRING,
SORT_FIELD TYPE STRING,
COMPTY TYPE STRING,
OBJECT_KEY_LONG TYPE STRING,
CHAR_VALUE_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPICLALVA_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_BAPICLALVA_STR-OBJECT_KEY sy-vline 
WA_BAPICLALVA_STR-NAME_CHAR sy-vline 
WA_BAPICLALVA_STR-INT_CHAR sy-vline 
WA_BAPICLALVA_STR-COUNTER sy-vline 
WA_BAPICLALVA_STR-OBJ_CLASS sy-vline 
WA_BAPICLALVA_STR-CLASS_TYPE sy-vline 
WA_BAPICLALVA_STR-INT_CNTR sy-vline 
WA_BAPICLALVA_STR-CHAR_VALUE sy-vline 
WA_BAPICLALVA_STR-NUM_VAL_FM sy-vline 
WA_BAPICLALVA_STR-MEAS_UNIT1 sy-vline 
WA_BAPICLALVA_STR-MUNIT1_ISO sy-vline 
WA_BAPICLALVA_STR-NUM_VAL_TO sy-vline 
WA_BAPICLALVA_STR-MEAS_UNIT sy-vline 
WA_BAPICLALVA_STR-MUNIT2_ISO sy-vline 
WA_BAPICLALVA_STR-VALUE_CODE sy-vline 
WA_BAPICLALVA_STR-TOLER_FROM sy-vline 
WA_BAPICLALVA_STR-TOLER_TO sy-vline 
WA_BAPICLALVA_STR-PERCENTAGE sy-vline 
WA_BAPICLALVA_STR-OPER_INC sy-vline 
WA_BAPICLALVA_STR-AUTHOR sy-vline 
WA_BAPICLALVA_STR-CHANGE_NO sy-vline 
WA_BAPICLALVA_STR-VALID_FROM sy-vline 
WA_BAPICLALVA_STR-DEL_IND sy-vline 
WA_BAPICLALVA_STR-USR_I_CHAR sy-vline 
WA_BAPICLALVA_STR-INSTANCE sy-vline 
WA_BAPICLALVA_STR-SORT_FIELD sy-vline 
WA_BAPICLALVA_STR-COMPTY sy-vline 
WA_BAPICLALVA_STR-OBJECT_KEY_LONG sy-vline 
WA_BAPICLALVA_STR-CHAR_VALUE_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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