ABAP Select data from SAP table FVD_CONDHEADER_CHANGE_X into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FVD_CONDHEADER_CHANGE_X
*  INTO TABLE @DATA(IT_FVD_CONDHEADER_CHANGE_X2).
*--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_FVD_CONDHEADER_CHANGE_X INDEX 1 INTO DATA(WA_FVD_CONDHEADER_CHANGE_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FVD_CONDHEADER_CHANGE_X>-CONDITION_VALID_FROM = 1.
<FVD_CONDHEADER_CHANGE_X>-CONDHEADTY = 1.
<FVD_CONDHEADER_CHANGE_X>-STILGRHY = 1.
<FVD_CONDHEADER_CHANGE_X>-REPAYMENT_TYPE = 1.
<FVD_CONDHEADER_CHANGE_X>-DISC_DET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FVD_CONDHEADER_CHANGE_X-P_D_RATE, sy-vline,
  WA_FVD_CONDHEADER_CHANGE_X-COMM_CAP, sy-vline,
  WA_FVD_CONDHEADER_CHANGE_X-CURRENCY, sy-vline,
  WA_FVD_CONDHEADER_CHANGE_X-CURRENCY_ISO, sy-vline,
  WA_FVD_CONDHEADER_CHANGE_X-YIELD_METHOD, sy-vline,
  WA_FVD_CONDHEADER_CHANGE_X-YIELD_METHOD_INT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FVD_CONDHEADER_CHANGE_X 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_FVD_CONDHEADER_CHANGE_X 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_FVD_CONDHEADER_CHANGE_X INTO WA_FVD_CONDHEADER_CHANGE_X.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FVD_CONDHEADER_CHANGE_X_STR, 
CONDITION_VALID_FROM TYPE STRING,
CONDHEADTY TYPE STRING,
STILGRHY TYPE STRING,
REPAYMENT_TYPE TYPE STRING,
DISC_DET TYPE STRING,
P_D_RATE TYPE STRING,
COMM_CAP TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
YIELD_METHOD TYPE STRING,
YIELD_METHOD_INT TYPE STRING,
INTEREST_CALC_METHOD TYPE STRING,
TERM_START TYPE STRING,
FINAL_DUE_DATE TYPE STRING,
CONTRACT TYPE STRING,
CONTR_ON TYPE STRING,
RETURN_BY TYPE STRING,
FIXED_UNT TYPE STRING,
SPECINTID TYPE STRING,
INCLUSIVE_INDICATOR TYPE STRING,
YIELD_FREQUENCY TYPE STRING,
ME_END_FP TYPE STRING,
EFFINTFROM TYPE STRING,
DMARKTZINS TYPE STRING,
CALENDAR TYPE STRING,
CL_DEF_INT TYPE STRING,
EFF_INTMTH TYPE STRING,
YRLYEFFINT TYPE STRING,
EFF_INTMTH_2 TYPE STRING,
ORIG_EFINT TYPE STRING,
BROUNDUNIT TYPE STRING,
SROUND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FVD_CONDHEADER_CHANGE_X_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_FVD_CONDHEADER_CHANGE_X_STR-CONDITION_VALID_FROM sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-CONDHEADTY sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-STILGRHY sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-REPAYMENT_TYPE sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-DISC_DET sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-P_D_RATE sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-COMM_CAP sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-CURRENCY sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-CURRENCY_ISO sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-YIELD_METHOD sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-YIELD_METHOD_INT sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-INTEREST_CALC_METHOD sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-TERM_START sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-FINAL_DUE_DATE sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-CONTRACT sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-CONTR_ON sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-RETURN_BY sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-FIXED_UNT sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-SPECINTID sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-INCLUSIVE_INDICATOR sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-YIELD_FREQUENCY sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-ME_END_FP sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-EFFINTFROM sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-DMARKTZINS sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-CALENDAR sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-CL_DEF_INT sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-EFF_INTMTH sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-YRLYEFFINT sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-EFF_INTMTH_2 sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-ORIG_EFINT sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-BROUNDUNIT sy-vline 
WA_FVD_CONDHEADER_CHANGE_X_STR-SROUND sy-vline      INTO ld_text SEPARATED BY SPACE.

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