ABAP Select data from SAP table /OPT/PO_HIST into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP /OPT/PO_HIST 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 /OPT/PO_HIST. 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 /OPT/PO_HIST 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_/OPT/PO_HIST TYPE STANDARD TABLE OF /OPT/PO_HIST,
      WA_/OPT/PO_HIST TYPE /OPT/PO_HIST,
      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: </OPT/PO_HIST> TYPE /OPT/PO_HIST.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /OPT/PO_HIST
  INTO TABLE IT_/OPT/PO_HIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /OPT/PO_HIST
*  INTO TABLE @DATA(IT_/OPT/PO_HIST2).
*--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_/OPT/PO_HIST INDEX 1 INTO DATA(WA_/OPT/PO_HIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/OPT/PO_HIST ASSIGNING </OPT/PO_HIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</OPT/PO_HIST>-PO_NO = 1.
</OPT/PO_HIST>-PO_LINE = 1.
</OPT/PO_HIST>-SEQ_NO = 1.
</OPT/PO_HIST>-DOC_YEAR = 1.
</OPT/PO_HIST>-DOC_NO = 1.

ENDLOOP.

LOOP AT IT_/OPT/PO_HIST INTO WA_/OPT/PO_HIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/OPT/PO_HIST-DOC_LINE, sy-vline,
  WA_/OPT/PO_HIST-DOC_DATE, sy-vline,
  WA_/OPT/PO_HIST-PO_HIST_CAT, sy-vline,
  WA_/OPT/PO_HIST-POST_DATE, sy-vline,
  WA_/OPT/PO_HIST-UOM, sy-vline,
  WA_/OPT/PO_HIST-UNIT_PRICE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/OPT/PO_HIST 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_/OPT/PO_HIST 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_/OPT/PO_HIST INTO WA_/OPT/PO_HIST.


*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 PO_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/OPT/PO_HIST-PO_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OPT/PO_HIST-PO_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field DOC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_/OPT/PO_HIST-DOC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OPT/PO_HIST-DOC_YEAR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/OPT/PO_HIST-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OPT/PO_HIST-UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field AMOUNT
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_/OPT/PO_HIST-AMOUNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/OPT/PO_HIST-AMOUNT.
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_/OPT/PO_HIST_STR, 
PO_NO TYPE STRING,
PO_LINE TYPE STRING,
SEQ_NO TYPE STRING,
DOC_YEAR TYPE STRING,
DOC_NO TYPE STRING,
DOC_LINE TYPE STRING,
DOC_DATE TYPE STRING,
PO_HIST_CAT TYPE STRING,
POST_DATE TYPE STRING,
UOM TYPE STRING,
UNIT_PRICE TYPE STRING,
QUANTITY TYPE STRING,
AMOUNT TYPE STRING,
CURRENCY TYPE STRING,
SIGN TYPE STRING,
VENDOR_REF TYPE STRING,
GR_INVOICED TYPE STRING,
STATUS TYPE STRING,
STATUS_PARA1 TYPE STRING,
STATUS_PARA2 TYPE STRING,
STATUS_PARA3 TYPE STRING,
STATUS_PARA4 TYPE STRING,
STATUS_ADDINFO TYPE STRING,
DELETED TYPE STRING,
DELIVERY_NOTE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/OPT/PO_HIST_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_/OPT/PO_HIST_STR-PO_NO sy-vline 
WA_/OPT/PO_HIST_STR-PO_LINE sy-vline 
WA_/OPT/PO_HIST_STR-SEQ_NO sy-vline 
WA_/OPT/PO_HIST_STR-DOC_YEAR sy-vline 
WA_/OPT/PO_HIST_STR-DOC_NO sy-vline 
WA_/OPT/PO_HIST_STR-DOC_LINE sy-vline 
WA_/OPT/PO_HIST_STR-DOC_DATE sy-vline 
WA_/OPT/PO_HIST_STR-PO_HIST_CAT sy-vline 
WA_/OPT/PO_HIST_STR-POST_DATE sy-vline 
WA_/OPT/PO_HIST_STR-UOM sy-vline 
WA_/OPT/PO_HIST_STR-UNIT_PRICE sy-vline 
WA_/OPT/PO_HIST_STR-QUANTITY sy-vline 
WA_/OPT/PO_HIST_STR-AMOUNT sy-vline 
WA_/OPT/PO_HIST_STR-CURRENCY sy-vline 
WA_/OPT/PO_HIST_STR-SIGN sy-vline 
WA_/OPT/PO_HIST_STR-VENDOR_REF sy-vline 
WA_/OPT/PO_HIST_STR-GR_INVOICED sy-vline 
WA_/OPT/PO_HIST_STR-STATUS sy-vline 
WA_/OPT/PO_HIST_STR-STATUS_PARA1 sy-vline 
WA_/OPT/PO_HIST_STR-STATUS_PARA2 sy-vline 
WA_/OPT/PO_HIST_STR-STATUS_PARA3 sy-vline 
WA_/OPT/PO_HIST_STR-STATUS_PARA4 sy-vline 
WA_/OPT/PO_HIST_STR-STATUS_ADDINFO sy-vline 
WA_/OPT/PO_HIST_STR-DELETED sy-vline 
WA_/OPT/PO_HIST_STR-DELIVERY_NOTE sy-vline      INTO ld_text SEPARATED BY SPACE.

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