ABAP Select data from SAP table BSPL_TREE_FIELDCAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BSPL_TREE_FIELDCAT
*  INTO TABLE @DATA(IT_BSPL_TREE_FIELDCAT2).
*--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_BSPL_TREE_FIELDCAT INDEX 1 INTO DATA(WA_BSPL_TREE_FIELDCAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BSPL_TREE_FIELDCAT>-PARENT = 1.
<BSPL_TREE_FIELDCAT>-ID = 1.
<BSPL_TREE_FIELDCAT>-RLDNR = 1.
<BSPL_TREE_FIELDCAT>-RRCTY = 1.
<BSPL_TREE_FIELDCAT>-RVERS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BSPL_TREE_FIELDCAT-VERSN, sy-vline,
  WA_BSPL_TREE_FIELDCAT-ERGSL, sy-vline,
  WA_BSPL_TREE_FIELDCAT-KTOPL, sy-vline,
  WA_BSPL_TREE_FIELDCAT-RACCT, sy-vline,
  WA_BSPL_TREE_FIELDCAT-KKTPL, sy-vline,
  WA_BSPL_TREE_FIELDCAT-BILKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BSPL_TREE_FIELDCAT 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_BSPL_TREE_FIELDCAT 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_BSPL_TREE_FIELDCAT INTO WA_BSPL_TREE_FIELDCAT.


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

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

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

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

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

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_BSPL_TREE_FIELDCAT-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSPL_TREE_FIELDCAT-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field REPVAL
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_BSPL_TREE_FIELDCAT-REPVAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSPL_TREE_FIELDCAT-REPVAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field COMPVAL
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_BSPL_TREE_FIELDCAT-COMPVAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSPL_TREE_FIELDCAT-COMPVAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC172, internal->external for field ABSVAR
CALL FUNCTION 'CONVERSION_EXIT_AC172_OUTPUT'
  EXPORTING
    input =                      WA_BSPL_TREE_FIELDCAT-ABSVAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BSPL_TREE_FIELDCAT-ABSVAR.
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_BSPL_TREE_FIELDCAT_STR, 
PARENT TYPE STRING,
ID TYPE STRING,
RLDNR TYPE STRING,
RRCTY TYPE STRING,
RVERS TYPE STRING,
VERSN TYPE STRING,
ERGSL TYPE STRING,
KTOPL TYPE STRING,
RACCT TYPE STRING,
KKTPL TYPE STRING,
BILKT TYPE STRING,
KTOP2 TYPE STRING,
ALTKT TYPE STRING,
RBUKRS TYPE STRING,
RBUSA TYPE STRING,
RFAREA TYPE STRING,
RYEAR TYPE STRING,
POPER TYPE STRING,
CURTP TYPE STRING,
WAERS TYPE STRING,
REPVAL TYPE STRING,
COMPVAL TYPE STRING,
ABSVAR TYPE STRING,
RELVAR TYPE STRING,
RELVAR_D TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BSPL_TREE_FIELDCAT_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_BSPL_TREE_FIELDCAT_STR-PARENT sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-ID sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RLDNR sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RRCTY sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RVERS sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-VERSN sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-ERGSL sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-KTOPL sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RACCT sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-KKTPL sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-BILKT sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-KTOP2 sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-ALTKT sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RBUKRS sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RBUSA sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RFAREA sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RYEAR sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-POPER sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-CURTP sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-WAERS sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-REPVAL sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-COMPVAL sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-ABSVAR sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RELVAR sy-vline 
WA_BSPL_TREE_FIELDCAT_STR-RELVAR_D sy-vline      INTO ld_text SEPARATED BY SPACE.

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