ABAP Select data from SAP table OIH14 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIH14 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 OIH14. 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 OIH14 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_OIH14 TYPE STANDARD TABLE OF OIH14,
      WA_OIH14 TYPE OIH14,
      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: <OIH14> TYPE OIH14.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIH14.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIH14
  INTO TABLE IT_OIH14.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIH14
*  INTO TABLE @DATA(IT_OIH142).
*--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_OIH14 INDEX 1 INTO DATA(WA_OIH142).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIH14 ASSIGNING <OIH14>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIH14>-MANDT = 1.
<OIH14>-MATNR = 1.
<OIH14>-BUKRS = 1.
<OIH14>-WERKS = 1.
<OIH14>-LGORT = 1.

ENDLOOP.

LOOP AT IT_OIH14 INTO WA_OIH14.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIH14-CHARG, sy-vline,
  WA_OIH14-SOBKZ, sy-vline,
  WA_OIH14-KDPOS, sy-vline,
  WA_OIH14-KDAUF, sy-vline,
  WA_OIH14-LIFNR, sy-vline,
  WA_OIH14-KUNNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIH14 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_OIH14 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_OIH14 INTO WA_OIH14.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIH14-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH14-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIH14-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH14-KDAUF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIH14-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH14-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIH14-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH14-KUNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit INVDT, internal->external for field INVDAT
CALL FUNCTION 'CONVERSION_EXIT_INVDT_OUTPUT'
  EXPORTING
    input =                      WA_OIH14-INVDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH14-INVDAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIH14-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH14-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIH14-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH14-GJAHR.
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_OIH14_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
KDPOS TYPE STRING,
KDAUF TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
PLPLA TYPE STRING,
INVDAT TYPE STRING,
BSTAR TYPE STRING,
XZAEL TYPE STRING,
XLOEK TYPE STRING,
BUCHM TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
LINENR TYPE STRING,
BWTTY TYPE STRING,
BWTAR TYPE STRING,
TAXGRP TYPE STRING,
HANTYP TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIH14_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_OIH14_STR-MANDT sy-vline 
WA_OIH14_STR-MATNR sy-vline 
WA_OIH14_STR-BUKRS sy-vline 
WA_OIH14_STR-WERKS sy-vline 
WA_OIH14_STR-LGORT sy-vline 
WA_OIH14_STR-CHARG sy-vline 
WA_OIH14_STR-SOBKZ sy-vline 
WA_OIH14_STR-KDPOS sy-vline 
WA_OIH14_STR-KDAUF sy-vline 
WA_OIH14_STR-LIFNR sy-vline 
WA_OIH14_STR-KUNNR sy-vline 
WA_OIH14_STR-PLPLA sy-vline 
WA_OIH14_STR-INVDAT sy-vline 
WA_OIH14_STR-BSTAR sy-vline 
WA_OIH14_STR-XZAEL sy-vline 
WA_OIH14_STR-XLOEK sy-vline 
WA_OIH14_STR-BUCHM sy-vline 
WA_OIH14_STR-BELNR sy-vline 
WA_OIH14_STR-GJAHR sy-vline 
WA_OIH14_STR-LINENR sy-vline 
WA_OIH14_STR-BWTTY sy-vline 
WA_OIH14_STR-BWTAR sy-vline 
WA_OIH14_STR-TAXGRP sy-vline 
WA_OIH14_STR-HANTYP sy-vline 
WA_OIH14_STR-ERDAT sy-vline 
WA_OIH14_STR-ERTIM sy-vline 
WA_OIH14_STR-ERNAM sy-vline 
WA_OIH14_STR-AEDAT sy-vline 
WA_OIH14_STR-AETIM sy-vline 
WA_OIH14_STR-AENAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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