ABAP Select data from SAP table IMAINTTLOPMATL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMAINTTLOPMATL
*  INTO TABLE @DATA(IT_IMAINTTLOPMATL2).
*--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_IMAINTTLOPMATL INDEX 1 INTO DATA(WA_IMAINTTLOPMATL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMAINTTLOPMATL>-MANDT = 1.
<IMAINTTLOPMATL>-TASKLISTTYPE = 1.
<IMAINTTLOPMATL>-TASKLISTGROUP = 1.
<IMAINTTLOPMATL>-TASKLISTGROUPCOUNTER = 1.
<IMAINTTLOPMATL>-TASKLISTSEQUENCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMAINTTLOPMATL-TASKLISTOPERATIONINTERNALID, sy-vline,
  WA_IMAINTTLOPMATL-TASKLISTOPBOMITMINTERNALID, sy-vline,
  WA_IMAINTTLOPMATL-TASKLISTOPBOMITMINTVERSCOUNTER, sy-vline,
  WA_IMAINTTLOPMATL-BILLOFMATERIALCATEGORY, sy-vline,
  WA_IMAINTTLOPMATL-BILLOFMATERIAL, sy-vline,
  WA_IMAINTTLOPMATL-BILLOFMATERIALVARIANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMAINTTLOPMATL 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_IMAINTTLOPMATL 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_IMAINTTLOPMATL INTO WA_IMAINTTLOPMATL.


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

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

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

*Conversion exit NUMCV, internal->external for field BILLOFMATERIAL
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTTLOPMATL-BILLOFMATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTTLOPMATL-BILLOFMATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field BILLOFMATERIALITEMUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTTLOPMATL-BILLOFMATERIALITEMUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTTLOPMATL-BILLOFMATERIALITEMUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field BILLOFMATERIALCOMPONENT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTTLOPMATL-BILLOFMATERIALCOMPONENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTTLOPMATL-BILLOFMATERIALCOMPONENT.
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_IMAINTTLOPMATL_STR, 
MANDT TYPE STRING,
TASKLISTTYPE TYPE STRING,
TASKLISTGROUP TYPE STRING,
TASKLISTGROUPCOUNTER TYPE STRING,
TASKLISTSEQUENCE TYPE STRING,
TASKLISTOPERATIONINTERNALID TYPE STRING,
TASKLISTOPBOMITMINTERNALID TYPE STRING,
TASKLISTOPBOMITMINTVERSCOUNTER TYPE STRING,
BILLOFMATERIALCATEGORY TYPE STRING,
BILLOFMATERIAL TYPE STRING,
BILLOFMATERIALVARIANT TYPE STRING,
BILLOFMATERIALITEMNODENUMBER TYPE STRING,
MATLCOMPISMARKEDFORBACKFLUSH TYPE STRING,
BILLOFMATERIALITEMQUANTITY TYPE STRING,
BILLOFMATERIALITEMUNIT TYPE STRING,
ISDELETED TYPE STRING,
RESVNISMRPRLVTORPURREQNISCRTED TYPE STRING,
BILLOFMATERIALCOMPONENT TYPE STRING,
BILLOFMATERIALITEMCATEGORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMAINTTLOPMATL_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_IMAINTTLOPMATL_STR-MANDT sy-vline 
WA_IMAINTTLOPMATL_STR-TASKLISTTYPE sy-vline 
WA_IMAINTTLOPMATL_STR-TASKLISTGROUP sy-vline 
WA_IMAINTTLOPMATL_STR-TASKLISTGROUPCOUNTER sy-vline 
WA_IMAINTTLOPMATL_STR-TASKLISTSEQUENCE sy-vline 
WA_IMAINTTLOPMATL_STR-TASKLISTOPERATIONINTERNALID sy-vline 
WA_IMAINTTLOPMATL_STR-TASKLISTOPBOMITMINTERNALID sy-vline 
WA_IMAINTTLOPMATL_STR-TASKLISTOPBOMITMINTVERSCOUNTER sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIALCATEGORY sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIAL sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIALVARIANT sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIALITEMNODENUMBER sy-vline 
WA_IMAINTTLOPMATL_STR-MATLCOMPISMARKEDFORBACKFLUSH sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIALITEMQUANTITY sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIALITEMUNIT sy-vline 
WA_IMAINTTLOPMATL_STR-ISDELETED sy-vline 
WA_IMAINTTLOPMATL_STR-RESVNISMRPRLVTORPURREQNISCRTED sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIALCOMPONENT sy-vline 
WA_IMAINTTLOPMATL_STR-BILLOFMATERIALITEMCATEGORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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