ABAP Select data from SAP table /SAPMP/MIG_T001 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPMP/MIG_T001 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 /SAPMP/MIG_T001. 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 /SAPMP/MIG_T001 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_/SAPMP/MIG_T001 TYPE STANDARD TABLE OF /SAPMP/MIG_T001,
      WA_/SAPMP/MIG_T001 TYPE /SAPMP/MIG_T001,
      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: </SAPMP/MIG_T001> TYPE /SAPMP/MIG_T001.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPMP/MIG_T001.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPMP/MIG_T001
  INTO TABLE IT_/SAPMP/MIG_T001.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPMP/MIG_T001
*  INTO TABLE @DATA(IT_/SAPMP/MIG_T0012).
*--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_/SAPMP/MIG_T001 INDEX 1 INTO DATA(WA_/SAPMP/MIG_T0012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPMP/MIG_T001 ASSIGNING </SAPMP/MIG_T001>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPMP/MIG_T001>-MANDT = 1.
</SAPMP/MIG_T001>-MATERIAL_OLD = 1.
</SAPMP/MIG_T001>-STD_LENGTH = 1.
</SAPMP/MIG_T001>-PLANT = 1.
</SAPMP/MIG_T001>-SALESORG = 1.

ENDLOOP.

LOOP AT IT_/SAPMP/MIG_T001 INTO WA_/SAPMP/MIG_T001.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPMP/MIG_T001-DISTR_CHAN, sy-vline,
  WA_/SAPMP/MIG_T001-VAL_AREA, sy-vline,
  WA_/SAPMP/MIG_T001-VAL_TYPE, sy-vline,
  WA_/SAPMP/MIG_T001-STGE_LOC, sy-vline,
  WA_/SAPMP/MIG_T001-STGE_TYPE, sy-vline,
  WA_/SAPMP/MIG_T001-WHSENUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPMP/MIG_T001 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_/SAPMP/MIG_T001 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_/SAPMP/MIG_T001 INTO WA_/SAPMP/MIG_T001.


*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 MATN1, internal->external for field MATERIAL_OLD
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/MIG_T001-MATERIAL_OLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/MIG_T001-MATERIAL_OLD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL_NEW
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/MIG_T001-MATERIAL_NEW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/MIG_T001-MATERIAL_NEW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field CONFIGURABLE_MAT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SAPMP/MIG_T001-CONFIGURABLE_MAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPMP/MIG_T001-CONFIGURABLE_MAT.
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_/SAPMP/MIG_T001_STR, 
MANDT TYPE STRING,
MATERIAL_OLD TYPE STRING,
STD_LENGTH TYPE STRING,
PLANT TYPE STRING,
SALESORG TYPE STRING,
DISTR_CHAN TYPE STRING,
VAL_AREA TYPE STRING,
VAL_TYPE TYPE STRING,
STGE_LOC TYPE STRING,
STGE_TYPE TYPE STRING,
WHSENUMBER TYPE STRING,
LIFO_VAL_LEV TYPE STRING,
MATERIAL_NEW TYPE STRING,
CLASS_ALL_BATCH TYPE STRING,
CONFIGURABLE_MAT TYPE STRING,
MRP_TYPE TYPE STRING,
EXTNUMBER TYPE STRING,
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
HANDLE TYPE STRING,
DATE_FROM TYPE STRING,
TIME_FROM TYPE STRING,
DATE_TO TYPE STRING,
TIME_TO TYPE STRING,
STEP001 TYPE STRING,
DATE001 TYPE STRING,
STIME001 TYPE STRING,
ETIME001 TYPE STRING,
STEP002 TYPE STRING,
DATE002 TYPE STRING,
STIME002 TYPE STRING,
ETIME002 TYPE STRING,
STEP003 TYPE STRING,
DATE003 TYPE STRING,
STIME003 TYPE STRING,
ETIME003 TYPE STRING,
STEP004 TYPE STRING,
DATE004 TYPE STRING,
STIME004 TYPE STRING,
ETIME004 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPMP/MIG_T001_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_/SAPMP/MIG_T001_STR-MANDT sy-vline 
WA_/SAPMP/MIG_T001_STR-MATERIAL_OLD sy-vline 
WA_/SAPMP/MIG_T001_STR-STD_LENGTH sy-vline 
WA_/SAPMP/MIG_T001_STR-PLANT sy-vline 
WA_/SAPMP/MIG_T001_STR-SALESORG sy-vline 
WA_/SAPMP/MIG_T001_STR-DISTR_CHAN sy-vline 
WA_/SAPMP/MIG_T001_STR-VAL_AREA sy-vline 
WA_/SAPMP/MIG_T001_STR-VAL_TYPE sy-vline 
WA_/SAPMP/MIG_T001_STR-STGE_LOC sy-vline 
WA_/SAPMP/MIG_T001_STR-STGE_TYPE sy-vline 
WA_/SAPMP/MIG_T001_STR-WHSENUMBER sy-vline 
WA_/SAPMP/MIG_T001_STR-LIFO_VAL_LEV sy-vline 
WA_/SAPMP/MIG_T001_STR-MATERIAL_NEW sy-vline 
WA_/SAPMP/MIG_T001_STR-CLASS_ALL_BATCH sy-vline 
WA_/SAPMP/MIG_T001_STR-CONFIGURABLE_MAT sy-vline 
WA_/SAPMP/MIG_T001_STR-MRP_TYPE sy-vline 
WA_/SAPMP/MIG_T001_STR-EXTNUMBER sy-vline 
WA_/SAPMP/MIG_T001_STR-OBJECT sy-vline 
WA_/SAPMP/MIG_T001_STR-SUBOBJECT sy-vline 
WA_/SAPMP/MIG_T001_STR-HANDLE sy-vline 
WA_/SAPMP/MIG_T001_STR-DATE_FROM sy-vline 
WA_/SAPMP/MIG_T001_STR-TIME_FROM sy-vline 
WA_/SAPMP/MIG_T001_STR-DATE_TO sy-vline 
WA_/SAPMP/MIG_T001_STR-TIME_TO sy-vline 
WA_/SAPMP/MIG_T001_STR-STEP001 sy-vline 
WA_/SAPMP/MIG_T001_STR-DATE001 sy-vline 
WA_/SAPMP/MIG_T001_STR-STIME001 sy-vline 
WA_/SAPMP/MIG_T001_STR-ETIME001 sy-vline 
WA_/SAPMP/MIG_T001_STR-STEP002 sy-vline 
WA_/SAPMP/MIG_T001_STR-DATE002 sy-vline 
WA_/SAPMP/MIG_T001_STR-STIME002 sy-vline 
WA_/SAPMP/MIG_T001_STR-ETIME002 sy-vline 
WA_/SAPMP/MIG_T001_STR-STEP003 sy-vline 
WA_/SAPMP/MIG_T001_STR-DATE003 sy-vline 
WA_/SAPMP/MIG_T001_STR-STIME003 sy-vline 
WA_/SAPMP/MIG_T001_STR-ETIME003 sy-vline 
WA_/SAPMP/MIG_T001_STR-STEP004 sy-vline 
WA_/SAPMP/MIG_T001_STR-DATE004 sy-vline 
WA_/SAPMP/MIG_T001_STR-STIME004 sy-vline 
WA_/SAPMP/MIG_T001_STR-ETIME004 sy-vline      INTO ld_text SEPARATED BY SPACE.

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