ABAP Select data from SAP table TIWIOITEM 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 TIWIOITEM 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 TIWIOITEM. 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 TIWIOITEM 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_TIWIOITEM TYPE STANDARD TABLE OF TIWIOITEM,
      WA_TIWIOITEM TYPE TIWIOITEM,
      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: <TIWIOITEM> TYPE TIWIOITEM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TIWIOITEM
*  INTO TABLE @DATA(IT_TIWIOITEM2).
*--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_TIWIOITEM INDEX 1 INTO DATA(WA_TIWIOITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TIWIOITEM>-BOX = 1.
<TIWIOITEM>-EXPAND = 1.
<TIWIOITEM>-CLASS = 1.
<TIWIOITEM>-OBJID = 1.
<TIWIOITEM>-PH_CLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TIWIOITEM-PH_OBJID, sy-vline,
  WA_TIWIOITEM-CHECKOUT, sy-vline,
  WA_TIWIOITEM-CHECKUSE, sy-vline,
  WA_TIWIOITEM-CREA_AT_D, sy-vline,
  WA_TIWIOITEM-CREA_BY, sy-vline,
  WA_TIWIOITEM-DESCRIPT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TIWIOITEM 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_TIWIOITEM 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_TIWIOITEM INTO WA_TIWIOITEM.


*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 TSTLC, internal->external for field CREA_AT_D
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_TIWIOITEM-CREA_AT_D
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TIWIOITEM-CREA_AT_D.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field PH_FC_AT_D
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_TIWIOITEM-PH_FC_AT_D
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TIWIOITEM-PH_FC_AT_D.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field LA_CH_AT_D
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_TIWIOITEM-LA_CH_AT_D
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TIWIOITEM-LA_CH_AT_D.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field ORIGLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TIWIOITEM-ORIGLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TIWIOITEM-ORIGLANGU.
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_TIWIOITEM_STR, 
BOX TYPE STRING,
EXPAND TYPE STRING,
CLASS TYPE STRING,
OBJID TYPE STRING,
PH_CLASS TYPE STRING,
PH_OBJID TYPE STRING,
CHECKOUT TYPE STRING,
CHECKUSE TYPE STRING,
CREA_AT_D TYPE STRING,
CREA_BY TYPE STRING,
DESCRIPT TYPE STRING,
DOC_FORM TYPE STRING,
COMMENT TYPE STRING,
COUNTRY TYPE STRING,
INDUSTRY TYPE STRING,
KEYWORD TYPE STRING,
NUM_LINES TYPE STRING,
NUM_PAGES TYPE STRING,
NUM_PARAS TYPE STRING,
NUM_WORDS TYPE STRING,
PH_FC_AT_D TYPE STRING,
PH_FC_BY TYPE STRING,
STATE TYPE STRING,
IWB_STATE TYPE STRING,
LANGUAGE TYPE STRING,
LA_CH_AT_D TYPE STRING,
LA_CH_BY TYPE STRING,
RELEASE TYPE STRING,
RESERVED TYPE STRING,
STO_CAT TYPE STRING,
ORIGLANGU TYPE STRING,
CONV_TO TYPE STRING,
CONV_FROM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TIWIOITEM_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_TIWIOITEM_STR-BOX sy-vline 
WA_TIWIOITEM_STR-EXPAND sy-vline 
WA_TIWIOITEM_STR-CLASS sy-vline 
WA_TIWIOITEM_STR-OBJID sy-vline 
WA_TIWIOITEM_STR-PH_CLASS sy-vline 
WA_TIWIOITEM_STR-PH_OBJID sy-vline 
WA_TIWIOITEM_STR-CHECKOUT sy-vline 
WA_TIWIOITEM_STR-CHECKUSE sy-vline 
WA_TIWIOITEM_STR-CREA_AT_D sy-vline 
WA_TIWIOITEM_STR-CREA_BY sy-vline 
WA_TIWIOITEM_STR-DESCRIPT sy-vline 
WA_TIWIOITEM_STR-DOC_FORM sy-vline 
WA_TIWIOITEM_STR-COMMENT sy-vline 
WA_TIWIOITEM_STR-COUNTRY sy-vline 
WA_TIWIOITEM_STR-INDUSTRY sy-vline 
WA_TIWIOITEM_STR-KEYWORD sy-vline 
WA_TIWIOITEM_STR-NUM_LINES sy-vline 
WA_TIWIOITEM_STR-NUM_PAGES sy-vline 
WA_TIWIOITEM_STR-NUM_PARAS sy-vline 
WA_TIWIOITEM_STR-NUM_WORDS sy-vline 
WA_TIWIOITEM_STR-PH_FC_AT_D sy-vline 
WA_TIWIOITEM_STR-PH_FC_BY sy-vline 
WA_TIWIOITEM_STR-STATE sy-vline 
WA_TIWIOITEM_STR-IWB_STATE sy-vline 
WA_TIWIOITEM_STR-LANGUAGE sy-vline 
WA_TIWIOITEM_STR-LA_CH_AT_D sy-vline 
WA_TIWIOITEM_STR-LA_CH_BY sy-vline 
WA_TIWIOITEM_STR-RELEASE sy-vline 
WA_TIWIOITEM_STR-RESERVED sy-vline 
WA_TIWIOITEM_STR-STO_CAT sy-vline 
WA_TIWIOITEM_STR-ORIGLANGU sy-vline 
WA_TIWIOITEM_STR-CONV_TO sy-vline 
WA_TIWIOITEM_STR-CONV_FROM sy-vline      INTO ld_text SEPARATED BY SPACE.

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