ABAP Select data from SAP table /SAPAPO/V_LOCM1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/V_LOCM1 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 /SAPAPO/V_LOCM1. 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 /SAPAPO/V_LOCM1 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_/SAPAPO/V_LOCM1 TYPE STANDARD TABLE OF /SAPAPO/V_LOCM1,
      WA_/SAPAPO/V_LOCM1 TYPE /SAPAPO/V_LOCM1,
      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: </SAPAPO/V_LOCM1> TYPE /SAPAPO/V_LOCM1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPAPO/V_LOCM1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/V_LOCM1
  INTO TABLE IT_/SAPAPO/V_LOCM1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/V_LOCM1
*  INTO TABLE @DATA(IT_/SAPAPO/V_LOCM12).
*--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_/SAPAPO/V_LOCM1 INDEX 1 INTO DATA(WA_/SAPAPO/V_LOCM12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/V_LOCM1 ASSIGNING </SAPAPO/V_LOCM1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/V_LOCM1>-MANDT = 1.
</SAPAPO/V_LOCM1>-LOCID = 1.
</SAPAPO/V_LOCM1>-SIMID = 1.
</SAPAPO/V_LOCM1>-LOCNO = 1.
</SAPAPO/V_LOCM1>-VRSIOEX = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/V_LOCM1 INTO WA_/SAPAPO/V_LOCM1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/V_LOCM1-LOCTYPE, sy-vline,
  WA_/SAPAPO/V_LOCM1-CONHINB, sy-vline,
  WA_/SAPAPO/V_LOCM1-UNITINB, sy-vline,
  WA_/SAPAPO/V_LOCM1-CONHINB_TP, sy-vline,
  WA_/SAPAPO/V_LOCM1-UNITINB_TP, sy-vline,
  WA_/SAPAPO/V_LOCM1-CONHOUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/V_LOCM1 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_/SAPAPO/V_LOCM1 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_/SAPAPO/V_LOCM1 INTO WA_/SAPAPO/V_LOCM1.


*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 CUNIT, internal->external for field UNITINB
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_LOCM1-UNITINB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_LOCM1-UNITINB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITINB_TP
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_LOCM1-UNITINB_TP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_LOCM1-UNITINB_TP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITOUT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_LOCM1-UNITOUT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_LOCM1-UNITOUT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UNITOUT_TP
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_LOCM1-UNITOUT_TP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_LOCM1-UNITOUT_TP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field TSDURAT
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_LOCM1-TSDURAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_LOCM1-TSDURAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field TSDURAT_MIN
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/V_LOCM1-TSDURAT_MIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/V_LOCM1-TSDURAT_MIN.
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_/SAPAPO/V_LOCM1_STR, 
MANDT TYPE STRING,
LOCID TYPE STRING,
SIMID TYPE STRING,
LOCNO TYPE STRING,
VRSIOEX TYPE STRING,
LOCTYPE TYPE STRING,
CONHINB TYPE STRING,
UNITINB TYPE STRING,
CONHINB_TP TYPE STRING,
UNITINB_TP TYPE STRING,
CONHOUT TYPE STRING,
UNITOUT TYPE STRING,
CONHOUT_TP TYPE STRING,
UNITOUT_TP TYPE STRING,
NDLOCPRFID TYPE STRING,
NDLOCPRFEX TYPE STRING,
NDLOCPRFTXT TYPE STRING,
LOCNEU TYPE STRING,
TSDURAT TYPE STRING,
MDPW TYPE STRING,
STKPROFID TYPE STRING,
DSTKPROFID TYPE STRING,
WSSPROFID TYPE STRING,
MINSRPLVALLMT TYPE STRING,
SRPLAPPRVALLMT TYPE STRING,
TSDURAT_MIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/V_LOCM1_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_/SAPAPO/V_LOCM1_STR-MANDT sy-vline 
WA_/SAPAPO/V_LOCM1_STR-LOCID sy-vline 
WA_/SAPAPO/V_LOCM1_STR-SIMID sy-vline 
WA_/SAPAPO/V_LOCM1_STR-LOCNO sy-vline 
WA_/SAPAPO/V_LOCM1_STR-VRSIOEX sy-vline 
WA_/SAPAPO/V_LOCM1_STR-LOCTYPE sy-vline 
WA_/SAPAPO/V_LOCM1_STR-CONHINB sy-vline 
WA_/SAPAPO/V_LOCM1_STR-UNITINB sy-vline 
WA_/SAPAPO/V_LOCM1_STR-CONHINB_TP sy-vline 
WA_/SAPAPO/V_LOCM1_STR-UNITINB_TP sy-vline 
WA_/SAPAPO/V_LOCM1_STR-CONHOUT sy-vline 
WA_/SAPAPO/V_LOCM1_STR-UNITOUT sy-vline 
WA_/SAPAPO/V_LOCM1_STR-CONHOUT_TP sy-vline 
WA_/SAPAPO/V_LOCM1_STR-UNITOUT_TP sy-vline 
WA_/SAPAPO/V_LOCM1_STR-NDLOCPRFID sy-vline 
WA_/SAPAPO/V_LOCM1_STR-NDLOCPRFEX sy-vline 
WA_/SAPAPO/V_LOCM1_STR-NDLOCPRFTXT sy-vline 
WA_/SAPAPO/V_LOCM1_STR-LOCNEU sy-vline 
WA_/SAPAPO/V_LOCM1_STR-TSDURAT sy-vline 
WA_/SAPAPO/V_LOCM1_STR-MDPW sy-vline 
WA_/SAPAPO/V_LOCM1_STR-STKPROFID sy-vline 
WA_/SAPAPO/V_LOCM1_STR-DSTKPROFID sy-vline 
WA_/SAPAPO/V_LOCM1_STR-WSSPROFID sy-vline 
WA_/SAPAPO/V_LOCM1_STR-MINSRPLVALLMT sy-vline 
WA_/SAPAPO/V_LOCM1_STR-SRPLAPPRVALLMT sy-vline 
WA_/SAPAPO/V_LOCM1_STR-TSDURAT_MIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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