ABAP Select data from SAP table TLVT_VAL_STEP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TLVT_VAL_STEP
*  INTO TABLE @DATA(IT_TLVT_VAL_STEP2).
*--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_TLVT_VAL_STEP INDEX 1 INTO DATA(WA_TLVT_VAL_STEP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TLVT_VAL_STEP>-MANDT = 1.
<TLVT_VAL_STEP>-VALUATION_TRANS = 1.
<TLVT_VAL_STEP>-STEP_NUMBER = 1.
<TLVT_VAL_STEP>-STEP_CAT = 1.
<TLVT_VAL_STEP>-SECURITY_PRICE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TLVT_VAL_STEP-EXCHANGE_RATE, sy-vline,
  WA_TLVT_VAL_STEP-HITEM_NUMBER, sy-vline,
  WA_TLVT_VAL_STEP-HINST_NUMBER, sy-vline,
  WA_TLVT_VAL_STEP-FLG_FREESTANDING, sy-vline,
  WA_TLVT_VAL_STEP-FISCAL_YEAR, sy-vline,
  WA_TLVT_VAL_STEP-HREL_NUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TLVT_VAL_STEP 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_TLVT_VAL_STEP 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_TLVT_VAL_STEP INTO WA_TLVT_VAL_STEP.


*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 EXCRT, internal->external for field EXCHANGE_RATE
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_TLVT_VAL_STEP-EXCHANGE_RATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TLVT_VAL_STEP-EXCHANGE_RATE.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field HREL_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TLVT_VAL_STEP-HREL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TLVT_VAL_STEP-HREL_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_TLVT_VAL_STEP_STR, 
MANDT TYPE STRING,
VALUATION_TRANS TYPE STRING,
STEP_NUMBER TYPE STRING,
STEP_CAT TYPE STRING,
SECURITY_PRICE TYPE STRING,
EXCHANGE_RATE TYPE STRING,
HITEM_NUMBER TYPE STRING,
HINST_NUMBER TYPE STRING,
FLG_FREESTANDING TYPE STRING,
FISCAL_YEAR TYPE STRING,
HREL_NUMBER TYPE STRING,
SUBPOSITION_OID TYPE STRING,
POSITION_CURR TYPE STRING,
VALUATION_CURR TYPE STRING,
MAV_PC TYPE STRING,
MAV_VC TYPE STRING,
MAV_PC_ORIG TYPE STRING,
MAV_VC_ORIG TYPE STRING,
MAV_PC_TRANSFER TYPE STRING,
MAV_VC_TRANSFER TYPE STRING,
UNITS TYPE STRING,
NOMINAL_AMT TYPE STRING,
NOMINAL_ORG_AMT TYPE STRING,
NOMINAL_CURR TYPE STRING,
ADDNL_LOG_OID TYPE STRING,
NPV_ICF_HITEM_PC TYPE STRING,
NPV_ICF_HITEM_VC TYPE STRING,
LOG_GUID TYPE STRING,
COMP_VAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TLVT_VAL_STEP_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_TLVT_VAL_STEP_STR-MANDT sy-vline 
WA_TLVT_VAL_STEP_STR-VALUATION_TRANS sy-vline 
WA_TLVT_VAL_STEP_STR-STEP_NUMBER sy-vline 
WA_TLVT_VAL_STEP_STR-STEP_CAT sy-vline 
WA_TLVT_VAL_STEP_STR-SECURITY_PRICE sy-vline 
WA_TLVT_VAL_STEP_STR-EXCHANGE_RATE sy-vline 
WA_TLVT_VAL_STEP_STR-HITEM_NUMBER sy-vline 
WA_TLVT_VAL_STEP_STR-HINST_NUMBER sy-vline 
WA_TLVT_VAL_STEP_STR-FLG_FREESTANDING sy-vline 
WA_TLVT_VAL_STEP_STR-FISCAL_YEAR sy-vline 
WA_TLVT_VAL_STEP_STR-HREL_NUMBER sy-vline 
WA_TLVT_VAL_STEP_STR-SUBPOSITION_OID sy-vline 
WA_TLVT_VAL_STEP_STR-POSITION_CURR sy-vline 
WA_TLVT_VAL_STEP_STR-VALUATION_CURR sy-vline 
WA_TLVT_VAL_STEP_STR-MAV_PC sy-vline 
WA_TLVT_VAL_STEP_STR-MAV_VC sy-vline 
WA_TLVT_VAL_STEP_STR-MAV_PC_ORIG sy-vline 
WA_TLVT_VAL_STEP_STR-MAV_VC_ORIG sy-vline 
WA_TLVT_VAL_STEP_STR-MAV_PC_TRANSFER sy-vline 
WA_TLVT_VAL_STEP_STR-MAV_VC_TRANSFER sy-vline 
WA_TLVT_VAL_STEP_STR-UNITS sy-vline 
WA_TLVT_VAL_STEP_STR-NOMINAL_AMT sy-vline 
WA_TLVT_VAL_STEP_STR-NOMINAL_ORG_AMT sy-vline 
WA_TLVT_VAL_STEP_STR-NOMINAL_CURR sy-vline 
WA_TLVT_VAL_STEP_STR-ADDNL_LOG_OID sy-vline 
WA_TLVT_VAL_STEP_STR-NPV_ICF_HITEM_PC sy-vline 
WA_TLVT_VAL_STEP_STR-NPV_ICF_HITEM_VC sy-vline 
WA_TLVT_VAL_STEP_STR-LOG_GUID sy-vline 
WA_TLVT_VAL_STEP_STR-COMP_VAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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