ABAP Select data from SAP table VEC_S_RULE_SELCLSFLD_HIER_OD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VEC_S_RULE_SELCLSFLD_HIER_OD
*  INTO TABLE @DATA(IT_VEC_S_RULE_SELCLSFLD_HIER_OD2).
*--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_VEC_S_RULE_SELCLSFLD_HIER_OD INDEX 1 INTO DATA(WA_VEC_S_RULE_SELCLSFLD_HIER_OD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VEC_S_RULE_SELCLSFLD_HIER_OD>-SCEN_ID = 1.
<VEC_S_RULE_SELCLSFLD_HIER_OD>-BASIS_FIELD_NAME = 1.
<VEC_S_RULE_SELCLSFLD_HIER_OD>-NODE_ID = 1.
<VEC_S_RULE_SELCLSFLD_HIER_OD>-HIER_TYPE = 1.
<VEC_S_RULE_SELCLSFLD_HIER_OD>-PAR_NODE_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VEC_S_RULE_SELCLSFLD_HIER_OD-NODE_DESC, sy-vline,
  WA_VEC_S_RULE_SELCLSFLD_HIER_OD-HIER_LEVEL, sy-vline,
  WA_VEC_S_RULE_SELCLSFLD_HIER_OD-HIER_DESC, sy-vline,
  WA_VEC_S_RULE_SELCLSFLD_HIER_OD-TYPE_TIME, sy-vline,
  WA_VEC_S_RULE_SELCLSFLD_HIER_OD-USEL_CLS_ID, sy-vline,
  WA_VEC_S_RULE_SELCLSFLD_HIER_OD-CDS_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VEC_S_RULE_SELCLSFLD_HIER_OD 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_VEC_S_RULE_SELCLSFLD_HIER_OD 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_VEC_S_RULE_SELCLSFLD_HIER_OD INTO WA_VEC_S_RULE_SELCLSFLD_HIER_OD.


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

*Conversion exit ISOLA, internal->external for field DDLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_VEC_S_RULE_SELCLSFLD_HIER_OD-DDLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VEC_S_RULE_SELCLSFLD_HIER_OD-DDLANGUAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_VEC_S_RULE_SELCLSFLD_HIER_OD-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VEC_S_RULE_SELCLSFLD_HIER_OD-DATATYPE.
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_VEC_S_RULE_SELCLSFLD_HIER_OD_STR, 
SCEN_ID TYPE STRING,
BASIS_FIELD_NAME TYPE STRING,
NODE_ID TYPE STRING,
HIER_TYPE TYPE STRING,
PAR_NODE_ID TYPE STRING,
NODE_DESC TYPE STRING,
HIER_LEVEL TYPE STRING,
HIER_DESC TYPE STRING,
TYPE_TIME TYPE STRING,
USEL_CLS_ID TYPE STRING,
CDS_NAME TYPE STRING,
STRUCOBJN TYPE STRING,
NODENAME TYPE STRING,
FIELDNAME TYPE STRING,
DDLANGUAGE TYPE STRING,
POSITION TYPE STRING,
KEYFLAG TYPE STRING,
ROLLNAME TYPE STRING,
DATATYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
CONVEXIT TYPE STRING,
DDTEXT TYPE STRING,
DEPTH TYPE STRING,
COMPTYPE TYPE STRING,
REFTABLE TYPE STRING,
REFFIELD TYPE STRING,
ENABLED TYPE STRING,
TRANSIENT TYPE STRING,
FIELDNAMEDBS TYPE STRING,
LFIELDNAME TYPE STRING,
FIELDORIGIN TYPE STRING,
FIELDLABEL TYPE STRING,
QUICKINFO TYPE STRING,
FIELDNAME_RAW TYPE STRING,
IS_VIRTUAL TYPE STRING,
IS_CALCULATED TYPE STRING,
CHECKTABLE TYPE STRING,
FIELD_STATUS TYPE STRING,
SHLPNAME TYPE STRING,
SHLPFIELD TYPE STRING,
ASSO_ANNOS_VALUE TYPE STRING,
ASSO_CDS_VIEW TYPE STRING,
HIERARCHY_TYPE TYPE STRING,
HAS_SUPERORDINATE_FIELD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VEC_S_RULE_SELCLSFLD_HIER_OD_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_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-SCEN_ID sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-BASIS_FIELD_NAME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-NODE_ID sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-HIER_TYPE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-PAR_NODE_ID sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-NODE_DESC sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-HIER_LEVEL sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-HIER_DESC sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-TYPE_TIME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-USEL_CLS_ID sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-CDS_NAME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-STRUCOBJN sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-NODENAME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-FIELDNAME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-DDLANGUAGE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-POSITION sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-KEYFLAG sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-ROLLNAME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-DATATYPE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-LENG sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-DECIMALS sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-CONVEXIT sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-DDTEXT sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-DEPTH sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-COMPTYPE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-REFTABLE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-REFFIELD sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-ENABLED sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-TRANSIENT sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-FIELDNAMEDBS sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-LFIELDNAME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-FIELDORIGIN sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-FIELDLABEL sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-QUICKINFO sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-FIELDNAME_RAW sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-IS_VIRTUAL sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-IS_CALCULATED sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-CHECKTABLE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-FIELD_STATUS sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-SHLPNAME sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-SHLPFIELD sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-ASSO_ANNOS_VALUE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-ASSO_CDS_VIEW sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-HIERARCHY_TYPE sy-vline 
WA_VEC_S_RULE_SELCLSFLD_HIER_OD_STR-HAS_SUPERORDINATE_FIELD sy-vline      INTO ld_text SEPARATED BY SPACE.

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