ABAP Select data from SAP table PKR_FORM_CRED into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKR_FORM_CRED
*  INTO TABLE @DATA(IT_PKR_FORM_CRED2).
*--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_PKR_FORM_CRED INDEX 1 INTO DATA(WA_PKR_FORM_CRED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKR_FORM_CRED>-PERNR = 1.
<PKR_FORM_CRED>-ENAME = 1.
<PKR_FORM_CRED>-BDATE = 1.
<PKR_FORM_CRED>-COMNM = 1.
<PKR_FORM_CRED>-BIZNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKR_FORM_CRED-SUBDT, sy-vline,
  WA_PKR_FORM_CRED-APPLY, sy-vline,
  WA_PKR_FORM_CRED-PERNRC, sy-vline,
  WA_PKR_FORM_CRED-ORGTXC, sy-vline,
  WA_PKR_FORM_CRED-TTSTO, sy-vline,
  WA_PKR_FORM_CRED-TTCRE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKR_FORM_CRED 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_PKR_FORM_CRED 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_PKR_FORM_CRED INTO WA_PKR_FORM_CRED.


*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_PKR_FORM_CRED_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
BDATE TYPE STRING,
COMNM TYPE STRING,
BIZNO TYPE STRING,
SUBDT TYPE STRING,
APPLY TYPE STRING,
PERNRC TYPE STRING,
ORGTXC TYPE STRING,
TTSTO TYPE STRING,
TTCRE TYPE STRING,
TTCAS TYPE STRING,
TTDEB TYPE STRING,
TTTRD TYPE STRING,
TTPTR TYPE STRING,
TTBPP TYPE STRING,
CDPRE TYPE STRING,
CRDEE TYPE STRING,
DBPRE TYPE STRING,
DBTHF TYPE STRING,
CDPPR TYPE STRING,
DBPPR TYPE STRING,
DBTH1 TYPE STRING,
TRD_DED TYPE STRING,
PTR_DED TYPE STRING,
DEB_DED TYPE STRING,
CRE_DED TYPE STRING,
BPP_DED TYPE STRING,
GRO_INC TYPE STRING,
MIN_AMT TYPE STRING,
EXL_AMT TYPE STRING,
DED_AMT TYPE STRING,
DED_LIM TYPE STRING,
GEN_AMT TYPE STRING,
CAL_DED TYPE STRING,
ADD_DED TYPE STRING,
TRD_ADD TYPE STRING,
PTR_ADD TYPE STRING,
BPP_ADD TYPE STRING,
EXL_IND TYPE STRING,
TRD_DEDM TYPE STRING,
PTR_DEDM TYPE STRING,
DEB_DEDM TYPE STRING,
CRE_DEDM TYPE STRING,
BPP_DEDM TYPE STRING,
TRD_DEDA TYPE STRING,
PTR_DEDA TYPE STRING,
DEB_DEDA TYPE STRING,
CRE_DEDA TYPE STRING,
BPP_DEDA TYPE STRING,
EXPLS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKR_FORM_CRED_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_PKR_FORM_CRED_STR-PERNR sy-vline 
WA_PKR_FORM_CRED_STR-ENAME sy-vline 
WA_PKR_FORM_CRED_STR-BDATE sy-vline 
WA_PKR_FORM_CRED_STR-COMNM sy-vline 
WA_PKR_FORM_CRED_STR-BIZNO sy-vline 
WA_PKR_FORM_CRED_STR-SUBDT sy-vline 
WA_PKR_FORM_CRED_STR-APPLY sy-vline 
WA_PKR_FORM_CRED_STR-PERNRC sy-vline 
WA_PKR_FORM_CRED_STR-ORGTXC sy-vline 
WA_PKR_FORM_CRED_STR-TTSTO sy-vline 
WA_PKR_FORM_CRED_STR-TTCRE sy-vline 
WA_PKR_FORM_CRED_STR-TTCAS sy-vline 
WA_PKR_FORM_CRED_STR-TTDEB sy-vline 
WA_PKR_FORM_CRED_STR-TTTRD sy-vline 
WA_PKR_FORM_CRED_STR-TTPTR sy-vline 
WA_PKR_FORM_CRED_STR-TTBPP sy-vline 
WA_PKR_FORM_CRED_STR-CDPRE sy-vline 
WA_PKR_FORM_CRED_STR-CRDEE sy-vline 
WA_PKR_FORM_CRED_STR-DBPRE sy-vline 
WA_PKR_FORM_CRED_STR-DBTHF sy-vline 
WA_PKR_FORM_CRED_STR-CDPPR sy-vline 
WA_PKR_FORM_CRED_STR-DBPPR sy-vline 
WA_PKR_FORM_CRED_STR-DBTH1 sy-vline 
WA_PKR_FORM_CRED_STR-TRD_DED sy-vline 
WA_PKR_FORM_CRED_STR-PTR_DED sy-vline 
WA_PKR_FORM_CRED_STR-DEB_DED sy-vline 
WA_PKR_FORM_CRED_STR-CRE_DED sy-vline 
WA_PKR_FORM_CRED_STR-BPP_DED sy-vline 
WA_PKR_FORM_CRED_STR-GRO_INC sy-vline 
WA_PKR_FORM_CRED_STR-MIN_AMT sy-vline 
WA_PKR_FORM_CRED_STR-EXL_AMT sy-vline 
WA_PKR_FORM_CRED_STR-DED_AMT sy-vline 
WA_PKR_FORM_CRED_STR-DED_LIM sy-vline 
WA_PKR_FORM_CRED_STR-GEN_AMT sy-vline 
WA_PKR_FORM_CRED_STR-CAL_DED sy-vline 
WA_PKR_FORM_CRED_STR-ADD_DED sy-vline 
WA_PKR_FORM_CRED_STR-TRD_ADD sy-vline 
WA_PKR_FORM_CRED_STR-PTR_ADD sy-vline 
WA_PKR_FORM_CRED_STR-BPP_ADD sy-vline 
WA_PKR_FORM_CRED_STR-EXL_IND sy-vline 
WA_PKR_FORM_CRED_STR-TRD_DEDM sy-vline 
WA_PKR_FORM_CRED_STR-PTR_DEDM sy-vline 
WA_PKR_FORM_CRED_STR-DEB_DEDM sy-vline 
WA_PKR_FORM_CRED_STR-CRE_DEDM sy-vline 
WA_PKR_FORM_CRED_STR-BPP_DEDM sy-vline 
WA_PKR_FORM_CRED_STR-TRD_DEDA sy-vline 
WA_PKR_FORM_CRED_STR-PTR_DEDA sy-vline 
WA_PKR_FORM_CRED_STR-DEB_DEDA sy-vline 
WA_PKR_FORM_CRED_STR-CRE_DEDA sy-vline 
WA_PKR_FORM_CRED_STR-BPP_DEDA sy-vline 
WA_PKR_FORM_CRED_STR-EXPLS sy-vline      INTO ld_text SEPARATED BY SPACE.

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