ABAP Select data from SAP table IMTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMTP
*  INTO TABLE @DATA(IT_IMTP2).
*--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_IMTP INDEX 1 INTO DATA(WA_IMTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMTP>-MANDT = 1.
<IMTP>-PRNAM = 1.
<IMTP>-GJAHR = 1.
<IMTP>-VERNR = 1.
<IMTP>-VERNA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMTP-PERIV, sy-vline,
  WA_IMTP-WAERS, sy-vline,
  WA_IMTP-PRART, sy-vline,
  WA_IMTP-UDATU, sy-vline,
  WA_IMTP-LOGSYC, sy-vline,
  WA_IMTP-CAPEX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMTP 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_IMTP 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_IMTP INTO WA_IMTP.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_IMTP-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMTP-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IMTP-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMTP-SPRAS.
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_IMTP_STR, 
MANDT TYPE STRING,
PRNAM TYPE STRING,
GJAHR TYPE STRING,
VERNR TYPE STRING,
VERNA TYPE STRING,
PERIV TYPE STRING,
WAERS TYPE STRING,
PRART TYPE STRING,
UDATU TYPE STRING,
LOGSYC TYPE STRING,
CAPEX TYPE STRING,
YDIST TYPE STRING,
SPRAS TYPE STRING,
KURSTO TYPE STRING,
ASSGBL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMTP_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_IMTP_STR-MANDT sy-vline 
WA_IMTP_STR-PRNAM sy-vline 
WA_IMTP_STR-GJAHR sy-vline 
WA_IMTP_STR-VERNR sy-vline 
WA_IMTP_STR-VERNA sy-vline 
WA_IMTP_STR-PERIV sy-vline 
WA_IMTP_STR-WAERS sy-vline 
WA_IMTP_STR-PRART sy-vline 
WA_IMTP_STR-UDATU sy-vline 
WA_IMTP_STR-LOGSYC sy-vline 
WA_IMTP_STR-CAPEX sy-vline 
WA_IMTP_STR-YDIST sy-vline 
WA_IMTP_STR-SPRAS sy-vline 
WA_IMTP_STR-KURSTO sy-vline 
WA_IMTP_STR-ASSGBL sy-vline      INTO ld_text SEPARATED BY SPACE.

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