ABAP Select data from SAP table IHC_STR_POLL_EXT_DOC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IHC_STR_POLL_EXT_DOC
*  INTO TABLE @DATA(IT_IHC_STR_POLL_EXT_DOC2).
*--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_IHC_STR_POLL_EXT_DOC INDEX 1 INTO DATA(WA_IHC_STR_POLL_EXT_DOC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IHC_STR_POLL_EXT_DOC>-UNIT = 1.
<IHC_STR_POLL_EXT_DOC>-PN_NUMBER = 1.
<IHC_STR_POLL_EXT_DOC>-PN_YEAR = 1.
<IHC_STR_POLL_EXT_DOC>-DOCNUM_S = 1.
<IHC_STR_POLL_EXT_DOC>-CREDAT_S = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IHC_STR_POLL_EXT_DOC-CRETIM_S, sy-vline,
  WA_IHC_STR_POLL_EXT_DOC-UPDDAT_S, sy-vline,
  WA_IHC_STR_POLL_EXT_DOC-UPDTIM_S, sy-vline,
  WA_IHC_STR_POLL_EXT_DOC-CREDAT_R, sy-vline,
  WA_IHC_STR_POLL_EXT_DOC-CRETIM_R, sy-vline,
  WA_IHC_STR_POLL_EXT_DOC-DOCNUM_R, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IHC_STR_POLL_EXT_DOC 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_IHC_STR_POLL_EXT_DOC 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_IHC_STR_POLL_EXT_DOC INTO WA_IHC_STR_POLL_EXT_DOC.


*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 _UNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT__UNIT_OUTPUT'
  EXPORTING
    input =                      WA_IHC_STR_POLL_EXT_DOC-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IHC_STR_POLL_EXT_DOC-UNIT.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit EDIPV, internal->external for field RCVPFC
CALL FUNCTION 'CONVERSION_EXIT_EDIPV_OUTPUT'
  EXPORTING
    input =                      WA_IHC_STR_POLL_EXT_DOC-RCVPFC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IHC_STR_POLL_EXT_DOC-RCVPFC.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

*Conversion exit _UNIT, internal->external for field UNIT_R
CALL FUNCTION 'CONVERSION_EXIT__UNIT_OUTPUT'
  EXPORTING
    input =                      WA_IHC_STR_POLL_EXT_DOC-UNIT_R
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IHC_STR_POLL_EXT_DOC-UNIT_R.
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_IHC_STR_POLL_EXT_DOC_STR, 
UNIT TYPE STRING,
PN_NUMBER TYPE STRING,
PN_YEAR TYPE STRING,
DOCNUM_S TYPE STRING,
CREDAT_S TYPE STRING,
CRETIM_S TYPE STRING,
UPDDAT_S TYPE STRING,
UPDTIM_S TYPE STRING,
CREDAT_R TYPE STRING,
CRETIM_R TYPE STRING,
DOCNUM_R TYPE STRING,
STATUS_R TYPE STRING,
STATUS_S TYPE STRING,
MES_TYPE TYPE STRING,
MES_COD TYPE STRING,
MES_FCT TYPE STRING,
SNDPRN TYPE STRING,
PRT_TYPE TYPE STRING,
RCVPRN TYPE STRING,
RCVPRT TYPE STRING,
RCVPFC TYPE STRING,
RFC_DEST TYPE STRING,
RFC_TYPE TYPE STRING,
REQUESTID TYPE STRING,
ORIGIN TYPE STRING,
LOGSYSTEM TYPE STRING,
OBJ_TYPE TYPE STRING,
OBJ_KEY TYPE STRING,
COMP_CODE TYPE STRING,
AC_DOC_NO TYPE STRING,
ITEM_NUM TYPE STRING,
FISC_YEAR TYPE STRING,
CLR_DOC_NO TYPE STRING,
STATUS TYPE STRING,
UNIT_R TYPE STRING,
PN_NUMBER_R TYPE STRING,
PN_YEAR_R TYPE STRING,
LAST_GUI_STATUS TYPE STRING,
IN_IDOC_NUMBER TYPE STRING,
OUT_IDOC_NUMBER TYPE STRING,
CLR_PRTNR_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IHC_STR_POLL_EXT_DOC_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_IHC_STR_POLL_EXT_DOC_STR-UNIT sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-PN_NUMBER sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-PN_YEAR sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-DOCNUM_S sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-CREDAT_S sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-CRETIM_S sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-UPDDAT_S sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-UPDTIM_S sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-CREDAT_R sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-CRETIM_R sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-DOCNUM_R sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-STATUS_R sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-STATUS_S sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-MES_TYPE sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-MES_COD sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-MES_FCT sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-SNDPRN sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-PRT_TYPE sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-RCVPRN sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-RCVPRT sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-RCVPFC sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-RFC_DEST sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-RFC_TYPE sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-REQUESTID sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-ORIGIN sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-LOGSYSTEM sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-OBJ_TYPE sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-OBJ_KEY sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-COMP_CODE sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-AC_DOC_NO sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-ITEM_NUM sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-FISC_YEAR sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-CLR_DOC_NO sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-STATUS sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-UNIT_R sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-PN_NUMBER_R sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-PN_YEAR_R sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-LAST_GUI_STATUS sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-IN_IDOC_NUMBER sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-OUT_IDOC_NUMBER sy-vline 
WA_IHC_STR_POLL_EXT_DOC_STR-CLR_PRTNR_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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