ABAP Select data from SAP table ISCNTRLPURCONCMMDTYEXCHRATETP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISCNTRLPURCONCMMDTYEXCHRATETP
*  INTO TABLE @DATA(IT_ISCNTRLPURCONCMMDTYEXCHRATETP2).
*--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_ISCNTRLPURCONCMMDTYEXCHRATETP INDEX 1 INTO DATA(WA_ISCNTRLPURCONCMMDTYEXCHRATETP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISCNTRLPURCONCMMDTYEXCHRATETP>-KEY = 1.
<ISCNTRLPURCONCMMDTYEXCHRATETP>-PARENT_KEY = 1.
<ISCNTRLPURCONCMMDTYEXCHRATETP>-ROOT_KEY = 1.
<ISCNTRLPURCONCMMDTYEXCHRATETP>-CENTRALPURCHASECONTRACT = 1.
<ISCNTRLPURCONCMMDTYEXCHRATETP>-CENTRALPURCHASECONTRACTITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISCNTRLPURCONCMMDTYEXCHRATETP-CONDITIONRECORD, sy-vline,
  WA_ISCNTRLPURCONCMMDTYEXCHRATETP-CONDITIONVALIDITYENDDATE, sy-vline,
  WA_ISCNTRLPURCONCMMDTYEXCHRATETP-CONDITIONSEQUENTIALNUMBER, sy-vline,
  WA_ISCNTRLPURCONCMMDTYEXCHRATETP-PRICINGCONDITIONTERM, sy-vline,
  WA_ISCNTRLPURCONCMMDTYEXCHRATETP-PRCGCNDNTRMEXCHRATEDATETIME, sy-vline,
  WA_ISCNTRLPURCONCMMDTYEXCHRATETP-CNDNEXCHRATEPERDDETNRESULTUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISCNTRLPURCONCMMDTYEXCHRATETP 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_ISCNTRLPURCONCMMDTYEXCHRATETP 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_ISCNTRLPURCONCMMDTYEXCHRATETP INTO WA_ISCNTRLPURCONCMMDTYEXCHRATETP.


*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 CENTRALPURCHASECONTRACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISCNTRLPURCONCMMDTYEXCHRATETP-CENTRALPURCHASECONTRACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISCNTRLPURCONCMMDTYEXCHRATETP-CENTRALPURCHASECONTRACT.
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_ISCNTRLPURCONCMMDTYEXCHRATETP_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
CENTRALPURCHASECONTRACT TYPE STRING,
CENTRALPURCHASECONTRACTITEM TYPE STRING,
CONDITIONRECORD TYPE STRING,
CONDITIONVALIDITYENDDATE TYPE STRING,
CONDITIONSEQUENTIALNUMBER TYPE STRING,
PRICINGCONDITIONTERM TYPE STRING,
PRCGCNDNTRMEXCHRATEDATETIME TYPE STRING,
CNDNEXCHRATEPERDDETNRESULTUUID TYPE STRING,
PRCGCONDITIONEXCHANGERATETYPE TYPE STRING,
PRICINGCONDITIONSOURCECURRENCY TYPE STRING,
PRICINGCONDITIONTARGETCURRENCY TYPE STRING,
PRICINGCONDITIONEXCHANGERATE TYPE STRING,
NUMBEROFSOURCECURRENCYUNITS TYPE STRING,
NUMBEROFTARGETCURRENCYUNITS TYPE STRING,
CNDNTRMEXCHRATESUBSTNDATETIME TYPE STRING,
CNDNTRMEXCHRATEISNONTRADINGDAY TYPE STRING,
PRCGCNDNTRMEXCHRATEISMISSING TYPE STRING,
CNDNTRMEXCHRATEISSUBSTITUTED TYPE STRING,
PRCGCNDNTRMEXCHRATEISIGNORED TYPE STRING,
PRCGCNDNTRMEXCHRATEFCSTSTATUS TYPE STRING,
PRCGCONDITIONSWAPEXCHANGERATE TYPE STRING,
PRCGCONDITIONSPOTEXCHANGERATE TYPE STRING,
CONDITIONTYPE TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYCONSISTENCYSTATUS TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
ISACTIVEENTITY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISCNTRLPURCONCMMDTYEXCHRATETP_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_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-KEY sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PARENT_KEY sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-ROOT_KEY sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CENTRALPURCHASECONTRACT sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CENTRALPURCHASECONTRACTITEM sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CONDITIONRECORD sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CONDITIONVALIDITYENDDATE sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CONDITIONSEQUENTIALNUMBER sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRICINGCONDITIONTERM sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRCGCNDNTRMEXCHRATEDATETIME sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CNDNEXCHRATEPERDDETNRESULTUUID sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRCGCONDITIONEXCHANGERATETYPE sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRICINGCONDITIONSOURCECURRENCY sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRICINGCONDITIONTARGETCURRENCY sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRICINGCONDITIONEXCHANGERATE sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-NUMBEROFSOURCECURRENCYUNITS sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-NUMBEROFTARGETCURRENCYUNITS sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CNDNTRMEXCHRATESUBSTNDATETIME sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CNDNTRMEXCHRATEISNONTRADINGDAY sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRCGCNDNTRMEXCHRATEISMISSING sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CNDNTRMEXCHRATEISSUBSTITUTED sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRCGCNDNTRMEXCHRATEISIGNORED sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRCGCNDNTRMEXCHRATEFCSTSTATUS sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRCGCONDITIONSWAPEXCHANGERATE sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-PRCGCONDITIONSPOTEXCHANGERATE sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-CONDITIONTYPE sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-HASACTIVEENTITY sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-DRAFTENTITYCONSISTENCYSTATUS sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_ISCNTRLPURCONCMMDTYEXCHRATETP_STR-ISACTIVEENTITY sy-vline      INTO ld_text SEPARATED BY SPACE.

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