ABAP Select data from SAP table CCREDITMRWLF1989 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CCREDITMRWLF1989 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 CCREDITMRWLF1989. 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 CCREDITMRWLF1989 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_CCREDITMRWLF1989 TYPE STANDARD TABLE OF CCREDITMRWLF1989,
      WA_CCREDITMRWLF1989 TYPE CCREDITMRWLF1989,
      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: <CCREDITMRWLF1989> TYPE CCREDITMRWLF1989.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CCREDITMRWLF1989.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CCREDITMRWLF1989
  INTO TABLE IT_CCREDITMRWLF1989.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CCREDITMRWLF1989
*  INTO TABLE @DATA(IT_CCREDITMRWLF19892).
*--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_CCREDITMRWLF1989 INDEX 1 INTO DATA(WA_CCREDITMRWLF19892).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CCREDITMRWLF1989 ASSIGNING <CCREDITMRWLF1989>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CCREDITMRWLF1989>-MANDT = 1.
<CCREDITMRWLF1989>-CREDITMEMOREQUEST = 1.
<CCREDITMRWLF1989>-SOLDTOPARTY = 1.
<CCREDITMRWLF1989>-CUSTOMERNAME = 1.
<CCREDITMRWLF1989>-PURCHASEORDERBYCUSTOMER = 1.

ENDLOOP.

LOOP AT IT_CCREDITMRWLF1989 INTO WA_CCREDITMRWLF1989.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CCREDITMRWLF1989-BILLINGDOCUMENTDATE, sy-vline,
  WA_CCREDITMRWLF1989-OVERALLORDRELTDBILLGSTATUS, sy-vline,
  WA_CCREDITMRWLF1989-OVERALLSDPROCESSSTATUS, sy-vline,
  WA_CCREDITMRWLF1989-OVERALLSDDOCUMENTREJECTIONSTS, sy-vline,
  WA_CCREDITMRWLF1989-OVERALLBILLINGBLOCKSTATUS, sy-vline,
  WA_CCREDITMRWLF1989-SALESDOCAPPROVALSTATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CCREDITMRWLF1989 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_CCREDITMRWLF1989 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_CCREDITMRWLF1989 INTO WA_CCREDITMRWLF1989.


*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 CREDITMEMOREQUEST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CCREDITMRWLF1989-CREDITMEMOREQUEST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCREDITMRWLF1989-CREDITMEMOREQUEST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SOLDTOPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CCREDITMRWLF1989-SOLDTOPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCREDITMRWLF1989-SOLDTOPARTY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AUART, internal->external for field CREDITMEMOREQUESTTYPE
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_CCREDITMRWLF1989-CREDITMEMOREQUESTTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCREDITMRWLF1989-CREDITMEMOREQUESTTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFERENCESDDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CCREDITMRWLF1989-REFERENCESDDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CCREDITMRWLF1989-REFERENCESDDOCUMENT.
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_CCREDITMRWLF1989_STR, 
MANDT TYPE STRING,
CREDITMEMOREQUEST TYPE STRING,
SOLDTOPARTY TYPE STRING,
CUSTOMERNAME TYPE STRING,
PURCHASEORDERBYCUSTOMER TYPE STRING,
BILLINGDOCUMENTDATE TYPE STRING,
OVERALLORDRELTDBILLGSTATUS TYPE STRING,
OVERALLSDPROCESSSTATUS TYPE STRING,
OVERALLSDDOCUMENTREJECTIONSTS TYPE STRING,
OVERALLBILLINGBLOCKSTATUS TYPE STRING,
SALESDOCAPPROVALSTATUS TYPE STRING,
CREDITMEMOREQUESTDATE TYPE STRING,
HEADERBILLINGBLOCKREASON TYPE STRING,
CREDITMEMOREQUESTTYPE TYPE STRING,
SALESORGANIZATION TYPE STRING,
DISTRIBUTIONCHANNEL TYPE STRING,
ORGANIZATIONDIVISION TYPE STRING,
SALESOFFICE TYPE STRING,
SALESGROUP TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
REFERENCESDDOCUMENT TYPE STRING,
SDDOCUMENTREASON TYPE STRING,
SALESDOCUMENTRJCNREASON TYPE STRING,
CRDTMEMOREQAPPRVLSTSCRITLTY TYPE STRING,
TRANSACTIONCURRENCY TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
ORGANIZATIONBPNAME1 TYPE STRING,
ORGANIZATIONBPNAME2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CCREDITMRWLF1989_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_CCREDITMRWLF1989_STR-MANDT sy-vline 
WA_CCREDITMRWLF1989_STR-CREDITMEMOREQUEST sy-vline 
WA_CCREDITMRWLF1989_STR-SOLDTOPARTY sy-vline 
WA_CCREDITMRWLF1989_STR-CUSTOMERNAME sy-vline 
WA_CCREDITMRWLF1989_STR-PURCHASEORDERBYCUSTOMER sy-vline 
WA_CCREDITMRWLF1989_STR-BILLINGDOCUMENTDATE sy-vline 
WA_CCREDITMRWLF1989_STR-OVERALLORDRELTDBILLGSTATUS sy-vline 
WA_CCREDITMRWLF1989_STR-OVERALLSDPROCESSSTATUS sy-vline 
WA_CCREDITMRWLF1989_STR-OVERALLSDDOCUMENTREJECTIONSTS sy-vline 
WA_CCREDITMRWLF1989_STR-OVERALLBILLINGBLOCKSTATUS sy-vline 
WA_CCREDITMRWLF1989_STR-SALESDOCAPPROVALSTATUS sy-vline 
WA_CCREDITMRWLF1989_STR-CREDITMEMOREQUESTDATE sy-vline 
WA_CCREDITMRWLF1989_STR-HEADERBILLINGBLOCKREASON sy-vline 
WA_CCREDITMRWLF1989_STR-CREDITMEMOREQUESTTYPE sy-vline 
WA_CCREDITMRWLF1989_STR-SALESORGANIZATION sy-vline 
WA_CCREDITMRWLF1989_STR-DISTRIBUTIONCHANNEL sy-vline 
WA_CCREDITMRWLF1989_STR-ORGANIZATIONDIVISION sy-vline 
WA_CCREDITMRWLF1989_STR-SALESOFFICE sy-vline 
WA_CCREDITMRWLF1989_STR-SALESGROUP sy-vline 
WA_CCREDITMRWLF1989_STR-CREATIONDATE sy-vline 
WA_CCREDITMRWLF1989_STR-LASTCHANGEDATE sy-vline 
WA_CCREDITMRWLF1989_STR-CREATEDBYUSER sy-vline 
WA_CCREDITMRWLF1989_STR-LASTCHANGEDBYUSER sy-vline 
WA_CCREDITMRWLF1989_STR-LASTCHANGEDATETIME sy-vline 
WA_CCREDITMRWLF1989_STR-REFERENCESDDOCUMENT sy-vline 
WA_CCREDITMRWLF1989_STR-SDDOCUMENTREASON sy-vline 
WA_CCREDITMRWLF1989_STR-SALESDOCUMENTRJCNREASON sy-vline 
WA_CCREDITMRWLF1989_STR-CRDTMEMOREQAPPRVLSTSCRITLTY sy-vline 
WA_CCREDITMRWLF1989_STR-TRANSACTIONCURRENCY sy-vline 
WA_CCREDITMRWLF1989_STR-TOTALNETAMOUNT sy-vline 
WA_CCREDITMRWLF1989_STR-ORGANIZATIONBPNAME1 sy-vline 
WA_CCREDITMRWLF1989_STR-ORGANIZATIONBPNAME2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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