ABAP Select data from SAP table RN1PRPATHIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RN1PRPATHIST 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 RN1PRPATHIST. 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 RN1PRPATHIST 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_RN1PRPATHIST TYPE STANDARD TABLE OF RN1PRPATHIST,
      WA_RN1PRPATHIST TYPE RN1PRPATHIST,
      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: <RN1PRPATHIST> TYPE RN1PRPATHIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RN1PRPATHIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RN1PRPATHIST
  INTO TABLE IT_RN1PRPATHIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RN1PRPATHIST
*  INTO TABLE @DATA(IT_RN1PRPATHIST2).
*--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_RN1PRPATHIST INDEX 1 INTO DATA(WA_RN1PRPATHIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RN1PRPATHIST ASSIGNING <RN1PRPATHIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RN1PRPATHIST>-EINRI = 1.
<RN1PRPATHIST>-EIUKZ = 1.
<RN1PRPATHIST>-EINKB = 1.
<RN1PRPATHIST>-PATID = 1.
<RN1PRPATHIST>-PATNR = 1.

ENDLOOP.

LOOP AT IT_RN1PRPATHIST INTO WA_RN1PRPATHIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RN1PRPATHIST-PZIFF, sy-vline,
  WA_RN1PRPATHIST-PNAME, sy-vline,
  WA_RN1PRPATHIST-FALNR_LOW, sy-vline,
  WA_RN1PRPATHIST-FZIFF, sy-vline,
  WA_RN1PRPATHIST-FALNR_HIGH, sy-vline,
  WA_RN1PRPATHIST-EQAKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RN1PRPATHIST 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_RN1PRPATHIST 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_RN1PRPATHIST INTO WA_RN1PRPATHIST.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PRPATHIST-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PRPATHIST-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PRPATHIST-PATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PRPATHIST-PATID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PRPATHIST-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PRPATHIST-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR_LOW
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PRPATHIST-FALNR_LOW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PRPATHIST-FALNR_LOW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR_HIGH
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PRPATHIST-FALNR_HIGH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PRPATHIST-FALNR_HIGH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RN1PRPATHIST-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RN1PRPATHIST-ORGFA.
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_RN1PRPATHIST_STR, 
EINRI TYPE STRING,
EIUKZ TYPE STRING,
EINKB TYPE STRING,
PATID TYPE STRING,
PATNR TYPE STRING,
PZIFF TYPE STRING,
PNAME TYPE STRING,
FALNR_LOW TYPE STRING,
FZIFF TYPE STRING,
FALNR_HIGH TYPE STRING,
EQAKZ TYPE STRING,
WEEKZ TYPE STRING,
MONKZ TYPE STRING,
YEAKZ TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
FRDKZ TYPE STRING,
ORGFA TYPE STRING,
HIRKZ TYPE STRING,
ORGNA TYPE STRING,
ANFKZ TYPE STRING,
DIAKZ TYPE STRING,
PKTKZ TYPE STRING,
DOCKZ TYPE STRING,
AKTKZ TYPE STRING,
PFLKZ TYPE STRING,
NTZKZ TYPE STRING,
TMNKZ TYPE STRING,
VKGKZ TYPE STRING,
LOCKZ TYPE STRING,
PRGKZ TYPE STRING,
LEXKZ TYPE STRING,
OWNKZ TYPE STRING,
FALNR_ICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RN1PRPATHIST_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_RN1PRPATHIST_STR-EINRI sy-vline 
WA_RN1PRPATHIST_STR-EIUKZ sy-vline 
WA_RN1PRPATHIST_STR-EINKB sy-vline 
WA_RN1PRPATHIST_STR-PATID sy-vline 
WA_RN1PRPATHIST_STR-PATNR sy-vline 
WA_RN1PRPATHIST_STR-PZIFF sy-vline 
WA_RN1PRPATHIST_STR-PNAME sy-vline 
WA_RN1PRPATHIST_STR-FALNR_LOW sy-vline 
WA_RN1PRPATHIST_STR-FZIFF sy-vline 
WA_RN1PRPATHIST_STR-FALNR_HIGH sy-vline 
WA_RN1PRPATHIST_STR-EQAKZ sy-vline 
WA_RN1PRPATHIST_STR-WEEKZ sy-vline 
WA_RN1PRPATHIST_STR-MONKZ sy-vline 
WA_RN1PRPATHIST_STR-YEAKZ sy-vline 
WA_RN1PRPATHIST_STR-BEGDT sy-vline 
WA_RN1PRPATHIST_STR-ENDDT sy-vline 
WA_RN1PRPATHIST_STR-FRDKZ sy-vline 
WA_RN1PRPATHIST_STR-ORGFA sy-vline 
WA_RN1PRPATHIST_STR-HIRKZ sy-vline 
WA_RN1PRPATHIST_STR-ORGNA sy-vline 
WA_RN1PRPATHIST_STR-ANFKZ sy-vline 
WA_RN1PRPATHIST_STR-DIAKZ sy-vline 
WA_RN1PRPATHIST_STR-PKTKZ sy-vline 
WA_RN1PRPATHIST_STR-DOCKZ sy-vline 
WA_RN1PRPATHIST_STR-AKTKZ sy-vline 
WA_RN1PRPATHIST_STR-PFLKZ sy-vline 
WA_RN1PRPATHIST_STR-NTZKZ sy-vline 
WA_RN1PRPATHIST_STR-TMNKZ sy-vline 
WA_RN1PRPATHIST_STR-VKGKZ sy-vline 
WA_RN1PRPATHIST_STR-LOCKZ sy-vline 
WA_RN1PRPATHIST_STR-PRGKZ sy-vline 
WA_RN1PRPATHIST_STR-LEXKZ sy-vline 
WA_RN1PRPATHIST_STR-OWNKZ sy-vline 
WA_RN1PRPATHIST_STR-FALNR_ICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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