ABAP Select data from SAP table OIHL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIHL 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 OIHL. 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 OIHL 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_OIHL TYPE STANDARD TABLE OF OIHL,
      WA_OIHL TYPE OIHL,
      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: <OIHL> TYPE OIHL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIHL
*  INTO TABLE @DATA(IT_OIHL2).
*--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_OIHL INDEX 1 INTO DATA(WA_OIHL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIHL>-MANDT = 1.
<OIHL>-LICIN = 1.
<OIHL>-LICTP = 1.
<OIHL>-CERTF1 = 1.
<OIHL>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIHL-LCTXT, sy-vline,
  WA_OIHL-KUNNR, sy-vline,
  WA_OIHL-KVGR1, sy-vline,
  WA_OIHL-MVGR2, sy-vline,
  WA_OIHL-MATNR, sy-vline,
  WA_OIHL-AUART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIHL 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_OIHL 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_OIHL INTO WA_OIHL.


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

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIHL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIHL-MATNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field LCFOL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIHL-LCFOL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIHL-LCFOL.
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_OIHL_STR, 
MANDT TYPE STRING,
LICIN TYPE STRING,
LICTP TYPE STRING,
CERTF1 TYPE STRING,
BUKRS TYPE STRING,
LCTXT TYPE STRING,
KUNNR TYPE STRING,
KVGR1 TYPE STRING,
MVGR2 TYPE STRING,
MATNR TYPE STRING,
AUART TYPE STRING,
LIFNR TYPE STRING,
LCOMP TYPE STRING,
LCUST TYPE STRING,
LCJUR TYPE STRING,
LICIA TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
LICMQ TYPE STRING,
LQUSE TYPE STRING,
MEINS TYPE STRING,
LCMOT TYPE STRING,
LAND1 TYPE STRING,
REGIO TYPE STRING,
COUNC TYPE STRING,
CITYC TYPE STRING,
ALTLC TYPE STRING,
HANTP TYPE STRING,
LCFOL TYPE STRING,
LTOPQ TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
UPNAM TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
EXEMP TYPE STRING,
DEFER TYPE STRING,
REFLT TYPE STRING,
WERKS TYPE STRING,
UMWRK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIHL_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_OIHL_STR-MANDT sy-vline 
WA_OIHL_STR-LICIN sy-vline 
WA_OIHL_STR-LICTP sy-vline 
WA_OIHL_STR-CERTF1 sy-vline 
WA_OIHL_STR-BUKRS sy-vline 
WA_OIHL_STR-LCTXT sy-vline 
WA_OIHL_STR-KUNNR sy-vline 
WA_OIHL_STR-KVGR1 sy-vline 
WA_OIHL_STR-MVGR2 sy-vline 
WA_OIHL_STR-MATNR sy-vline 
WA_OIHL_STR-AUART sy-vline 
WA_OIHL_STR-LIFNR sy-vline 
WA_OIHL_STR-LCOMP sy-vline 
WA_OIHL_STR-LCUST sy-vline 
WA_OIHL_STR-LCJUR sy-vline 
WA_OIHL_STR-LICIA sy-vline 
WA_OIHL_STR-DATAB sy-vline 
WA_OIHL_STR-DATBI sy-vline 
WA_OIHL_STR-LICMQ sy-vline 
WA_OIHL_STR-LQUSE sy-vline 
WA_OIHL_STR-MEINS sy-vline 
WA_OIHL_STR-LCMOT sy-vline 
WA_OIHL_STR-LAND1 sy-vline 
WA_OIHL_STR-REGIO sy-vline 
WA_OIHL_STR-COUNC sy-vline 
WA_OIHL_STR-CITYC sy-vline 
WA_OIHL_STR-ALTLC sy-vline 
WA_OIHL_STR-HANTP sy-vline 
WA_OIHL_STR-LCFOL sy-vline 
WA_OIHL_STR-LTOPQ sy-vline 
WA_OIHL_STR-ERNAM sy-vline 
WA_OIHL_STR-ERDAT sy-vline 
WA_OIHL_STR-ERTIM sy-vline 
WA_OIHL_STR-UPNAM sy-vline 
WA_OIHL_STR-UPDAT sy-vline 
WA_OIHL_STR-UPTIM sy-vline 
WA_OIHL_STR-EXEMP sy-vline 
WA_OIHL_STR-DEFER sy-vline 
WA_OIHL_STR-REFLT sy-vline 
WA_OIHL_STR-WERKS sy-vline 
WA_OIHL_STR-UMWRK sy-vline      INTO ld_text SEPARATED BY SPACE.

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