ABAP Select data from SAP table OIUX1_TRN_TAXHC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIUX1_TRN_TAXHC 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 OIUX1_TRN_TAXHC. 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 OIUX1_TRN_TAXHC 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_OIUX1_TRN_TAXHC TYPE STANDARD TABLE OF OIUX1_TRN_TAXHC,
      WA_OIUX1_TRN_TAXHC TYPE OIUX1_TRN_TAXHC,
      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: <OIUX1_TRN_TAXHC> TYPE OIUX1_TRN_TAXHC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIUX1_TRN_TAXHC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIUX1_TRN_TAXHC
  INTO TABLE IT_OIUX1_TRN_TAXHC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIUX1_TRN_TAXHC
*  INTO TABLE @DATA(IT_OIUX1_TRN_TAXHC2).
*--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_OIUX1_TRN_TAXHC INDEX 1 INTO DATA(WA_OIUX1_TRN_TAXHC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIUX1_TRN_TAXHC ASSIGNING <OIUX1_TRN_TAXHC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIUX1_TRN_TAXHC>-MANDT = 1.
<OIUX1_TRN_TAXHC>-BUKRS = 1.
<OIUX1_TRN_TAXHC>-VNAME = 1.
<OIUX1_TRN_TAXHC>-DOI_NO = 1.
<OIUX1_TRN_TAXHC>-WL_NO = 1.

ENDLOOP.

LOOP AT IT_OIUX1_TRN_TAXHC INTO WA_OIUX1_TRN_TAXHC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIUX1_TRN_TAXHC-WC_NO, sy-vline,
  WA_OIUX1_TRN_TAXHC-MP_NO, sy-vline,
  WA_OIUX1_TRN_TAXHC-SALE_DT, sy-vline,
  WA_OIUX1_TRN_TAXHC-MATNR, sy-vline,
  WA_OIUX1_TRN_TAXHC-DN_NO, sy-vline,
  WA_OIUX1_TRN_TAXHC-CT_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIUX1_TRN_TAXHC 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_OIUX1_TRN_TAXHC 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_OIUX1_TRN_TAXHC INTO WA_OIUX1_TRN_TAXHC.


*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 VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-VNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOI_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-DOI_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-DOI_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WL_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-WL_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-WL_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-WC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-WC_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-MP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DN_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-DN_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-DN_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CT_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-CT_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-CT_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field DOC_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-DOC_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-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_OIUX1_TRN_TAXHC-DOC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-DOC_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field UNIT_VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-UNIT_VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-UNIT_VNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PU_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIUX1_TRN_TAXHC-PU_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIUX1_TRN_TAXHC-PU_NO.
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_OIUX1_TRN_TAXHC_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
VNAME TYPE STRING,
DOI_NO TYPE STRING,
WL_NO TYPE STRING,
WC_NO TYPE STRING,
MP_NO TYPE STRING,
SALE_DT TYPE STRING,
MATNR TYPE STRING,
DN_NO TYPE STRING,
CT_NO TYPE STRING,
VL_TYPE_CD TYPE STRING,
TAXHC_SYSNO TYPE STRING,
DOC_YEAR TYPE STRING,
DOC_NO TYPE STRING,
MAJPD_CD TYPE STRING,
UNIT_VNAME TYPE STRING,
PU_NO TYPE STRING,
PPA_RSN_CD TYPE STRING,
PRI_GEO_LOC TYPE STRING,
SEC_GEO_LOC TYPE STRING,
GRV_AM TYPE STRING,
PRD_DAYS TYPE STRING,
REJECT_FLAG TYPE STRING,
USERNAME TYPE STRING,
TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIUX1_TRN_TAXHC_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_OIUX1_TRN_TAXHC_STR-MANDT sy-vline 
WA_OIUX1_TRN_TAXHC_STR-BUKRS sy-vline 
WA_OIUX1_TRN_TAXHC_STR-VNAME sy-vline 
WA_OIUX1_TRN_TAXHC_STR-DOI_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-WL_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-WC_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-MP_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-SALE_DT sy-vline 
WA_OIUX1_TRN_TAXHC_STR-MATNR sy-vline 
WA_OIUX1_TRN_TAXHC_STR-DN_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-CT_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-VL_TYPE_CD sy-vline 
WA_OIUX1_TRN_TAXHC_STR-TAXHC_SYSNO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-DOC_YEAR sy-vline 
WA_OIUX1_TRN_TAXHC_STR-DOC_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-MAJPD_CD sy-vline 
WA_OIUX1_TRN_TAXHC_STR-UNIT_VNAME sy-vline 
WA_OIUX1_TRN_TAXHC_STR-PU_NO sy-vline 
WA_OIUX1_TRN_TAXHC_STR-PPA_RSN_CD sy-vline 
WA_OIUX1_TRN_TAXHC_STR-PRI_GEO_LOC sy-vline 
WA_OIUX1_TRN_TAXHC_STR-SEC_GEO_LOC sy-vline 
WA_OIUX1_TRN_TAXHC_STR-GRV_AM sy-vline 
WA_OIUX1_TRN_TAXHC_STR-PRD_DAYS sy-vline 
WA_OIUX1_TRN_TAXHC_STR-REJECT_FLAG sy-vline 
WA_OIUX1_TRN_TAXHC_STR-USERNAME sy-vline 
WA_OIUX1_TRN_TAXHC_STR-TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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