ABAP Select data from SAP table /GEP/T_NEED into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /GEP/T_NEED 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 /GEP/T_NEED. 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 /GEP/T_NEED 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_/GEP/T_NEED TYPE STANDARD TABLE OF /GEP/T_NEED,
      WA_/GEP/T_NEED TYPE /GEP/T_NEED,
      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: </GEP/T_NEED> TYPE /GEP/T_NEED.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /GEP/T_NEED
  INTO TABLE IT_/GEP/T_NEED.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /GEP/T_NEED
*  INTO TABLE @DATA(IT_/GEP/T_NEED2).
*--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_/GEP/T_NEED INDEX 1 INTO DATA(WA_/GEP/T_NEED2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/GEP/T_NEED ASSIGNING </GEP/T_NEED>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</GEP/T_NEED>-MANDT = 1.
</GEP/T_NEED>-APPLICATION = 1.
</GEP/T_NEED>-OBJECTKEY = 1.
</GEP/T_NEED>-ROWKEY_GROUP = 1.
</GEP/T_NEED>-ROWKEY_ELEMENT = 1.

ENDLOOP.

LOOP AT IT_/GEP/T_NEED INTO WA_/GEP/T_NEED.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/GEP/T_NEED-STATUS, sy-vline,
  WA_/GEP/T_NEED-INSCRIPTION, sy-vline,
  WA_/GEP/T_NEED-KTEXT_SPLIT, sy-vline,
  WA_/GEP/T_NEED-STARTDATE, sy-vline,
  WA_/GEP/T_NEED-STARTTIME, sy-vline,
  WA_/GEP/T_NEED-ENDDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/GEP/T_NEED 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_/GEP/T_NEED 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_/GEP/T_NEED INTO WA_/GEP/T_NEED.


*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 IDNLF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/GEP/T_NEED-IDNLF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/GEP/T_NEED-IDNLF.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit SXIDN, internal->external for field /GEP/ANFEMAIL
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_/GEP/T_NEED-/GEP/ANFEMAIL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/GEP/T_NEED-/GEP/ANFEMAIL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_/GEP/T_NEED-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/GEP/T_NEED-TPLNR.
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_/GEP/T_NEED_STR, 
MANDT TYPE STRING,
APPLICATION TYPE STRING,
OBJECTKEY TYPE STRING,
ROWKEY_GROUP TYPE STRING,
ROWKEY_ELEMENT TYPE STRING,
STATUS TYPE STRING,
INSCRIPTION TYPE STRING,
KTEXT_SPLIT TYPE STRING,
STARTDATE TYPE STRING,
STARTTIME TYPE STRING,
ENDDATE TYPE STRING,
ENDTIME TYPE STRING,
CREATED_FROM TYPE STRING,
CREATED_AT TYPE STRING,
CHANGED_FROM TYPE STRING,
CHANGED_AT TYPE STRING,
IDNLF TYPE STRING,
KAUFN TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
KUNUM TYPE STRING,
/GEP/ANFNAME1 TYPE STRING,
/GEP/ANFNAME2 TYPE STRING,
/GEP/ANFTEL TYPE STRING,
/GEP/ANFEMAIL TYPE STRING,
MSAUS TYPE STRING,
/GEP/FAHRNAME1 TYPE STRING,
/GEP/FAHRSTREET TYPE STRING,
/GEP/FAHRCITY TYPE STRING,
/GEP/FAHRTEL TYPE STRING,
/GEP/LICENCENR TYPE STRING,
ADRNR TYPE STRING,
STRMN TYPE STRING,
STRUR TYPE STRING,
LTRMN TYPE STRING,
LTRUR TYPE STRING,
AUSVN TYPE STRING,
AUZTV TYPE STRING,
AUSBS TYPE STRING,
AUZTB TYPE STRING,
SWERK TYPE STRING,
EQUNR TYPE STRING,
TPLNR TYPE STRING,
/GEP/PASSENGER TYPE STRING,
/GEP/AUTOM TYPE STRING,
/GEP/KLIMA TYPE STRING,
/GEP/DACHG TYPE STRING,
/GEP/SCHNEEK TYPE STRING,
/GEP/WINTERR TYPE STRING,
/GEP/VHCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/GEP/T_NEED_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_/GEP/T_NEED_STR-MANDT sy-vline 
WA_/GEP/T_NEED_STR-APPLICATION sy-vline 
WA_/GEP/T_NEED_STR-OBJECTKEY sy-vline 
WA_/GEP/T_NEED_STR-ROWKEY_GROUP sy-vline 
WA_/GEP/T_NEED_STR-ROWKEY_ELEMENT sy-vline 
WA_/GEP/T_NEED_STR-STATUS sy-vline 
WA_/GEP/T_NEED_STR-INSCRIPTION sy-vline 
WA_/GEP/T_NEED_STR-KTEXT_SPLIT sy-vline 
WA_/GEP/T_NEED_STR-STARTDATE sy-vline 
WA_/GEP/T_NEED_STR-STARTTIME sy-vline 
WA_/GEP/T_NEED_STR-ENDDATE sy-vline 
WA_/GEP/T_NEED_STR-ENDTIME sy-vline 
WA_/GEP/T_NEED_STR-CREATED_FROM sy-vline 
WA_/GEP/T_NEED_STR-CREATED_AT sy-vline 
WA_/GEP/T_NEED_STR-CHANGED_FROM sy-vline 
WA_/GEP/T_NEED_STR-CHANGED_AT sy-vline 
WA_/GEP/T_NEED_STR-IDNLF sy-vline 
WA_/GEP/T_NEED_STR-KAUFN sy-vline 
WA_/GEP/T_NEED_STR-KDAUF sy-vline 
WA_/GEP/T_NEED_STR-KDPOS sy-vline 
WA_/GEP/T_NEED_STR-KUNUM sy-vline 
WA_/GEP/T_NEED_STR-/GEP/ANFNAME1 sy-vline 
WA_/GEP/T_NEED_STR-/GEP/ANFNAME2 sy-vline 
WA_/GEP/T_NEED_STR-/GEP/ANFTEL sy-vline 
WA_/GEP/T_NEED_STR-/GEP/ANFEMAIL sy-vline 
WA_/GEP/T_NEED_STR-MSAUS sy-vline 
WA_/GEP/T_NEED_STR-/GEP/FAHRNAME1 sy-vline 
WA_/GEP/T_NEED_STR-/GEP/FAHRSTREET sy-vline 
WA_/GEP/T_NEED_STR-/GEP/FAHRCITY sy-vline 
WA_/GEP/T_NEED_STR-/GEP/FAHRTEL sy-vline 
WA_/GEP/T_NEED_STR-/GEP/LICENCENR sy-vline 
WA_/GEP/T_NEED_STR-ADRNR sy-vline 
WA_/GEP/T_NEED_STR-STRMN sy-vline 
WA_/GEP/T_NEED_STR-STRUR sy-vline 
WA_/GEP/T_NEED_STR-LTRMN sy-vline 
WA_/GEP/T_NEED_STR-LTRUR sy-vline 
WA_/GEP/T_NEED_STR-AUSVN sy-vline 
WA_/GEP/T_NEED_STR-AUZTV sy-vline 
WA_/GEP/T_NEED_STR-AUSBS sy-vline 
WA_/GEP/T_NEED_STR-AUZTB sy-vline 
WA_/GEP/T_NEED_STR-SWERK sy-vline 
WA_/GEP/T_NEED_STR-EQUNR sy-vline 
WA_/GEP/T_NEED_STR-TPLNR sy-vline 
WA_/GEP/T_NEED_STR-/GEP/PASSENGER sy-vline 
WA_/GEP/T_NEED_STR-/GEP/AUTOM sy-vline 
WA_/GEP/T_NEED_STR-/GEP/KLIMA sy-vline 
WA_/GEP/T_NEED_STR-/GEP/DACHG sy-vline 
WA_/GEP/T_NEED_STR-/GEP/SCHNEEK sy-vline 
WA_/GEP/T_NEED_STR-/GEP/WINTERR sy-vline 
WA_/GEP/T_NEED_STR-/GEP/VHCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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