ABAP Select data from SAP table FKLOCK_LOCKMASS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKLOCK_LOCKMASS
*  INTO TABLE @DATA(IT_FKLOCK_LOCKMASS2).
*--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_FKLOCK_LOCKMASS INDEX 1 INTO DATA(WA_FKLOCK_LOCKMASS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKLOCK_LOCKMASS>-LOCK_DATA = 1.
<FKLOCK_LOCKMASS>-CLIENT = 1.
<FKLOCK_LOCKMASS>-LOOBJ1 = 1.
<FKLOCK_LOCKMASS>-LOTYP = 1.
<FKLOCK_LOCKMASS>-PROID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKLOCK_LOCKMASS-LOCKR, sy-vline,
  WA_FKLOCK_LOCKMASS-FDATE, sy-vline,
  WA_FKLOCK_LOCKMASS-TDATE, sy-vline,
  WA_FKLOCK_LOCKMASS-GPART, sy-vline,
  WA_FKLOCK_LOCKMASS-VKONT, sy-vline,
  WA_FKLOCK_LOCKMASS-COND_LOOBJ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKLOCK_LOCKMASS 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_FKLOCK_LOCKMASS 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_FKLOCK_LOCKMASS INTO WA_FKLOCK_LOCKMASS.


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

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKLOCK_LOCKMASS-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKLOCK_LOCKMASS-VKONT.
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_FKLOCK_LOCKMASS_STR, 
LOCK_DATA TYPE STRING,
CLIENT TYPE STRING,
LOOBJ1 TYPE STRING,
LOTYP TYPE STRING,
PROID TYPE STRING,
LOCKR TYPE STRING,
FDATE TYPE STRING,
TDATE TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
COND_LOOBJ TYPE STRING,
ACTKEY TYPE STRING,
UNAME TYPE STRING,
ADATUM TYPE STRING,
AZEIT TYPE STRING,
PROTECTED TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
EXP_GPART TYPE STRING,
EXP_VKONT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKLOCK_LOCKMASS_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_FKLOCK_LOCKMASS_STR-LOCK_DATA sy-vline 
WA_FKLOCK_LOCKMASS_STR-CLIENT sy-vline 
WA_FKLOCK_LOCKMASS_STR-LOOBJ1 sy-vline 
WA_FKLOCK_LOCKMASS_STR-LOTYP sy-vline 
WA_FKLOCK_LOCKMASS_STR-PROID sy-vline 
WA_FKLOCK_LOCKMASS_STR-LOCKR sy-vline 
WA_FKLOCK_LOCKMASS_STR-FDATE sy-vline 
WA_FKLOCK_LOCKMASS_STR-TDATE sy-vline 
WA_FKLOCK_LOCKMASS_STR-GPART sy-vline 
WA_FKLOCK_LOCKMASS_STR-VKONT sy-vline 
WA_FKLOCK_LOCKMASS_STR-COND_LOOBJ sy-vline 
WA_FKLOCK_LOCKMASS_STR-ACTKEY sy-vline 
WA_FKLOCK_LOCKMASS_STR-UNAME sy-vline 
WA_FKLOCK_LOCKMASS_STR-ADATUM sy-vline 
WA_FKLOCK_LOCKMASS_STR-AZEIT sy-vline 
WA_FKLOCK_LOCKMASS_STR-PROTECTED sy-vline 
WA_FKLOCK_LOCKMASS_STR-LAUFD sy-vline 
WA_FKLOCK_LOCKMASS_STR-LAUFI sy-vline 
WA_FKLOCK_LOCKMASS_STR-EXP_GPART sy-vline 
WA_FKLOCK_LOCKMASS_STR-EXP_VKONT sy-vline      INTO ld_text SEPARATED BY SPACE.

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