ABAP Select data from SAP table OIH_J1B_TXCD_ITEM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIH_J1B_TXCD_ITEM 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 OIH_J1B_TXCD_ITEM. 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 OIH_J1B_TXCD_ITEM 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_OIH_J1B_TXCD_ITEM TYPE STANDARD TABLE OF OIH_J1B_TXCD_ITEM,
      WA_OIH_J1B_TXCD_ITEM TYPE OIH_J1B_TXCD_ITEM,
      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: <OIH_J1B_TXCD_ITEM> TYPE OIH_J1B_TXCD_ITEM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIH_J1B_TXCD_ITEM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIH_J1B_TXCD_ITEM
  INTO TABLE IT_OIH_J1B_TXCD_ITEM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIH_J1B_TXCD_ITEM
*  INTO TABLE @DATA(IT_OIH_J1B_TXCD_ITEM2).
*--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_OIH_J1B_TXCD_ITEM INDEX 1 INTO DATA(WA_OIH_J1B_TXCD_ITEM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIH_J1B_TXCD_ITEM ASSIGNING <OIH_J1B_TXCD_ITEM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIH_J1B_TXCD_ITEM>-KNUMV = 1.
<OIH_J1B_TXCD_ITEM>-ITMNUM = 1.
<OIH_J1B_TXCD_ITEM>-BUZEI = 1.
<OIH_J1B_TXCD_ITEM>-TRAN_TYPE = 1.
<OIH_J1B_TXCD_ITEM>-INT_OP = 1.

ENDLOOP.

LOOP AT IT_OIH_J1B_TXCD_ITEM INTO WA_OIH_J1B_TXCD_ITEM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIH_J1B_TXCD_ITEM-CUSTYPE, sy-vline,
  WA_OIH_J1B_TXCD_ITEM-OIHCTXGR, sy-vline,
  WA_OIH_J1B_TXCD_ITEM-VEND_COD, sy-vline,
  WA_OIH_J1B_TXCD_ITEM-OIHVTXGR, sy-vline,
  WA_OIH_J1B_TXCD_ITEM-MAT_TAX_GR, sy-vline,
  WA_OIH_J1B_TXCD_ITEM-TAXATION_ORIG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIH_J1B_TXCD_ITEM 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_OIH_J1B_TXCD_ITEM 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_OIH_J1B_TXCD_ITEM INTO WA_OIH_J1B_TXCD_ITEM.


*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 MIXPROD
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIH_J1B_TXCD_ITEM-MIXPROD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH_J1B_TXCD_ITEM-MIXPROD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OS_TXLW1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIH_J1B_TXCD_ITEM-OS_TXLW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH_J1B_TXCD_ITEM-OS_TXLW1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OS_TXLW2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIH_J1B_TXCD_ITEM-OS_TXLW2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIH_J1B_TXCD_ITEM-OS_TXLW2.
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_OIH_J1B_TXCD_ITEM_STR, 
KNUMV TYPE STRING,
ITMNUM TYPE STRING,
BUZEI TYPE STRING,
TRAN_TYPE TYPE STRING,
INT_OP TYPE STRING,
CUSTYPE TYPE STRING,
OIHCTXGR TYPE STRING,
VEND_COD TYPE STRING,
OIHVTXGR TYPE STRING,
MAT_TAX_GR TYPE STRING,
TAXATION_ORIG TYPE STRING,
TAXATION_DEST TYPE STRING,
OIHCV03 TYPE STRING,
OIHCV80O TYPE STRING,
OIHCV80D TYPE STRING,
PRICE_CONTROL TYPE STRING,
TAX_CODE TYPE STRING,
SUBTR_TYPE TYPE STRING,
PRINT_ICMS TYPE STRING,
STPR_INTRA TYPE STRING,
STPR_INTER TYPE STRING,
FACTOR1 TYPE STRING,
FACTOR2 TYPE STRING,
CREDIT_IPI TYPE STRING,
CREDIT_ICMS TYPE STRING,
TAXTYPE TYPE STRING,
PERCENT TYPE STRING,
MIXPROD TYPE STRING,
FACPIS TYPE STRING,
FACCOF TYPE STRING,
FORMULA TYPE STRING,
PRINT_IND TYPE STRING,
OS_TXLW1 TYPE STRING,
OS_TXLW2 TYPE STRING,
TXLW4 TYPE STRING,
ZONA_FRANCA TYPE STRING,
OIHVTYPE TYPE STRING,
OIHNOCON TYPE STRING,
OIHREFST TYPE STRING,
LEG_CLAIM TYPE STRING,
NO_LBOOK TYPE STRING,
PUR_NOTAX TYPE STRING,
PISCOF_EXC TYPE STRING,
PMPF_USED_ORIGIN TYPE STRING,
PMPF_USED_DESTIN TYPE STRING,
OIHSURCHARGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIH_J1B_TXCD_ITEM_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_OIH_J1B_TXCD_ITEM_STR-KNUMV sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-ITMNUM sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-BUZEI sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-TRAN_TYPE sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-INT_OP sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-CUSTYPE sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHCTXGR sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-VEND_COD sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHVTXGR sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-MAT_TAX_GR sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-TAXATION_ORIG sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-TAXATION_DEST sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHCV03 sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHCV80O sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHCV80D sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PRICE_CONTROL sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-TAX_CODE sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-SUBTR_TYPE sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PRINT_ICMS sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-STPR_INTRA sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-STPR_INTER sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-FACTOR1 sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-FACTOR2 sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-CREDIT_IPI sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-CREDIT_ICMS sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-TAXTYPE sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PERCENT sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-MIXPROD sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-FACPIS sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-FACCOF sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-FORMULA sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PRINT_IND sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OS_TXLW1 sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OS_TXLW2 sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-TXLW4 sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-ZONA_FRANCA sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHVTYPE sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHNOCON sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHREFST sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-LEG_CLAIM sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-NO_LBOOK sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PUR_NOTAX sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PISCOF_EXC sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PMPF_USED_ORIGIN sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-PMPF_USED_DESTIN sy-vline 
WA_OIH_J1B_TXCD_ITEM_STR-OIHSURCHARGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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