ABAP Select data from SAP table VEC_S_RULE_RST 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_RST 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_RST. 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_RST 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_RST TYPE STANDARD TABLE OF VEC_S_RULE_RST,
      WA_VEC_S_RULE_RST TYPE VEC_S_RULE_RST,
      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_RST> TYPE VEC_S_RULE_RST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VEC_S_RULE_RST
*  INTO TABLE @DATA(IT_VEC_S_RULE_RST2).
*--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_RST INDEX 1 INTO DATA(WA_VEC_S_RULE_RST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VEC_S_RULE_RST>-RULE_NUM = 1.
<VEC_S_RULE_RST>-RULE_RST = 1.
<VEC_S_RULE_RST>-RULE_EXCEP = 1.
<VEC_S_RULE_RST>-ENTITY = 1.
<VEC_S_RULE_RST>-CURR_CODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VEC_S_RULE_RST-GROUP_BY_VAL, sy-vline,
  WA_VEC_S_RULE_RST-GROUP_BY_VAL1, sy-vline,
  WA_VEC_S_RULE_RST-GROUP_BY_VAL2, sy-vline,
  WA_VEC_S_RULE_RST-POWER, sy-vline,
  WA_VEC_S_RULE_RST-TOL_AMT, sy-vline,
  WA_VEC_S_RULE_RST-TOL_PERCENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VEC_S_RULE_RST 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_RST 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_RST INTO WA_VEC_S_RULE_RST.


*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 RULE_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VEC_S_RULE_RST-RULE_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VEC_S_RULE_RST-RULE_NUM.
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_RST_STR, 
RULE_NUM TYPE STRING,
RULE_RST TYPE STRING,
RULE_EXCEP TYPE STRING,
ENTITY TYPE STRING,
CURR_CODE TYPE STRING,
GROUP_BY_VAL TYPE STRING,
GROUP_BY_VAL1 TYPE STRING,
GROUP_BY_VAL2 TYPE STRING,
POWER TYPE STRING,
TOL_AMT TYPE STRING,
TOL_PERCENT TYPE STRING,
TOL_IS_AND TYPE STRING,
LEFT_OPD TYPE STRING,
LEFT_CURR_CODE TYPE STRING,
RIGHT_OPD TYPE STRING,
RIGHT_CURR_CODE TYPE STRING,
CURR_CODE_TGT TYPE STRING,
LEFT_OPD_TGT TYPE STRING,
RIGHT_OPD_TGT TYPE STRING,
DIFF_OPD_TGT TYPE STRING,
DIFF_OPD_TGT_PCT TYPE STRING,
V1 TYPE STRING,
V2 TYPE STRING,
V3 TYPE STRING,
V4 TYPE STRING,
V5 TYPE STRING,
V6 TYPE STRING,
V7 TYPE STRING,
V8 TYPE STRING,
V9 TYPE STRING,
V10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VEC_S_RULE_RST_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_RST_STR-RULE_NUM sy-vline 
WA_VEC_S_RULE_RST_STR-RULE_RST sy-vline 
WA_VEC_S_RULE_RST_STR-RULE_EXCEP sy-vline 
WA_VEC_S_RULE_RST_STR-ENTITY sy-vline 
WA_VEC_S_RULE_RST_STR-CURR_CODE sy-vline 
WA_VEC_S_RULE_RST_STR-GROUP_BY_VAL sy-vline 
WA_VEC_S_RULE_RST_STR-GROUP_BY_VAL1 sy-vline 
WA_VEC_S_RULE_RST_STR-GROUP_BY_VAL2 sy-vline 
WA_VEC_S_RULE_RST_STR-POWER sy-vline 
WA_VEC_S_RULE_RST_STR-TOL_AMT sy-vline 
WA_VEC_S_RULE_RST_STR-TOL_PERCENT sy-vline 
WA_VEC_S_RULE_RST_STR-TOL_IS_AND sy-vline 
WA_VEC_S_RULE_RST_STR-LEFT_OPD sy-vline 
WA_VEC_S_RULE_RST_STR-LEFT_CURR_CODE sy-vline 
WA_VEC_S_RULE_RST_STR-RIGHT_OPD sy-vline 
WA_VEC_S_RULE_RST_STR-RIGHT_CURR_CODE sy-vline 
WA_VEC_S_RULE_RST_STR-CURR_CODE_TGT sy-vline 
WA_VEC_S_RULE_RST_STR-LEFT_OPD_TGT sy-vline 
WA_VEC_S_RULE_RST_STR-RIGHT_OPD_TGT sy-vline 
WA_VEC_S_RULE_RST_STR-DIFF_OPD_TGT sy-vline 
WA_VEC_S_RULE_RST_STR-DIFF_OPD_TGT_PCT sy-vline 
WA_VEC_S_RULE_RST_STR-V1 sy-vline 
WA_VEC_S_RULE_RST_STR-V2 sy-vline 
WA_VEC_S_RULE_RST_STR-V3 sy-vline 
WA_VEC_S_RULE_RST_STR-V4 sy-vline 
WA_VEC_S_RULE_RST_STR-V5 sy-vline 
WA_VEC_S_RULE_RST_STR-V6 sy-vline 
WA_VEC_S_RULE_RST_STR-V7 sy-vline 
WA_VEC_S_RULE_RST_STR-V8 sy-vline 
WA_VEC_S_RULE_RST_STR-V9 sy-vline 
WA_VEC_S_RULE_RST_STR-V10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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