ABAP Select data from SAP table J_1IITMDTL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_1IITMDTL 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 J_1IITMDTL. 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 J_1IITMDTL 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_J_1IITMDTL TYPE STANDARD TABLE OF J_1IITMDTL,
      WA_J_1IITMDTL TYPE J_1IITMDTL,
      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: <J_1IITMDTL> TYPE J_1IITMDTL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_1IITMDTL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_1IITMDTL
  INTO TABLE IT_J_1IITMDTL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_1IITMDTL
*  INTO TABLE @DATA(IT_J_1IITMDTL2).
*--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_J_1IITMDTL INDEX 1 INTO DATA(WA_J_1IITMDTL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_1IITMDTL ASSIGNING <J_1IITMDTL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_1IITMDTL>-MANDT = 1.
<J_1IITMDTL>-TRNTYP = 1.
<J_1IITMDTL>-MJAHR = 1.
<J_1IITMDTL>-MBLNR = 1.
<J_1IITMDTL>-ZEILE = 1.

ENDLOOP.

LOOP AT IT_J_1IITMDTL INTO WA_J_1IITMDTL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_1IITMDTL-LIFNR, sy-vline,
  WA_J_1IITMDTL-MATNR, sy-vline,
  WA_J_1IITMDTL-WERKS, sy-vline,
  WA_J_1IITMDTL-CHARG, sy-vline,
  WA_J_1IITMDTL-MENGE, sy-vline,
  WA_J_1IITMDTL-RMENGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_1IITMDTL 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_J_1IITMDTL 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_J_1IITMDTL INTO WA_J_1IITMDTL.


*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 MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_J_1IITMDTL-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1IITMDTL-MJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1IITMDTL-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1IITMDTL-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_1IITMDTL-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1IITMDTL-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_1IITMDTL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1IITMDTL-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_1IITMDTL-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_1IITMDTL-MEINS.
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_J_1IITMDTL_STR, 
MANDT TYPE STRING,
TRNTYP TYPE STRING,
MJAHR TYPE STRING,
MBLNR TYPE STRING,
ZEILE TYPE STRING,
LIFNR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
CHARG TYPE STRING,
MENGE TYPE STRING,
RMENGE TYPE STRING,
MEINS TYPE STRING,
CHAPID TYPE STRING,
EXCUR TYPE STRING,
EXBED TYPE STRING,
EXSED TYPE STRING,
EXAED TYPE STRING,
STATUS TYPE STRING,
RDOC1 TYPE STRING,
RYEAR1 TYPE STRING,
RIND1 TYPE STRING,
RDOC2 TYPE STRING,
RYEAR2 TYPE STRING,
RIND2 TYPE STRING,
SERIAL1 TYPE STRING,
SYEAR1 TYPE STRING,
SERIAL2 TYPE STRING,
SYEAR2 TYPE STRING,
USNAM TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_1IITMDTL_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_J_1IITMDTL_STR-MANDT sy-vline 
WA_J_1IITMDTL_STR-TRNTYP sy-vline 
WA_J_1IITMDTL_STR-MJAHR sy-vline 
WA_J_1IITMDTL_STR-MBLNR sy-vline 
WA_J_1IITMDTL_STR-ZEILE sy-vline 
WA_J_1IITMDTL_STR-LIFNR sy-vline 
WA_J_1IITMDTL_STR-MATNR sy-vline 
WA_J_1IITMDTL_STR-WERKS sy-vline 
WA_J_1IITMDTL_STR-CHARG sy-vline 
WA_J_1IITMDTL_STR-MENGE sy-vline 
WA_J_1IITMDTL_STR-RMENGE sy-vline 
WA_J_1IITMDTL_STR-MEINS sy-vline 
WA_J_1IITMDTL_STR-CHAPID sy-vline 
WA_J_1IITMDTL_STR-EXCUR sy-vline 
WA_J_1IITMDTL_STR-EXBED sy-vline 
WA_J_1IITMDTL_STR-EXSED sy-vline 
WA_J_1IITMDTL_STR-EXAED sy-vline 
WA_J_1IITMDTL_STR-STATUS sy-vline 
WA_J_1IITMDTL_STR-RDOC1 sy-vline 
WA_J_1IITMDTL_STR-RYEAR1 sy-vline 
WA_J_1IITMDTL_STR-RIND1 sy-vline 
WA_J_1IITMDTL_STR-RDOC2 sy-vline 
WA_J_1IITMDTL_STR-RYEAR2 sy-vline 
WA_J_1IITMDTL_STR-RIND2 sy-vline 
WA_J_1IITMDTL_STR-SERIAL1 sy-vline 
WA_J_1IITMDTL_STR-SYEAR1 sy-vline 
WA_J_1IITMDTL_STR-SERIAL2 sy-vline 
WA_J_1IITMDTL_STR-SYEAR2 sy-vline 
WA_J_1IITMDTL_STR-USNAM sy-vline 
WA_J_1IITMDTL_STR-CPUDT sy-vline 
WA_J_1IITMDTL_STR-CPUTM sy-vline      INTO ld_text SEPARATED BY SPACE.

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