ABAP Select data from SAP table MSSBLOCKINGLOCKHIER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MSSBLOCKINGLOCKHIER
*  INTO TABLE @DATA(IT_MSSBLOCKINGLOCKHIER2).
*--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_MSSBLOCKINGLOCKHIER INDEX 1 INTO DATA(WA_MSSBLOCKINGLOCKHIER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MSSBLOCKINGLOCKHIER>-TOPSID = 1.
<MSSBLOCKINGLOCKHIER>-LCKLEVEL = 1.
<MSSBLOCKINGLOCKHIER>-HOSTNAME = 1.
<MSSBLOCKINGLOCKHIER>-PROGNAME = 1.
<MSSBLOCKINGLOCKHIER>-SESS_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MSSBLOCKINGLOCKHIER-BLK_SESS_ID, sy-vline,
  WA_MSSBLOCKINGLOCKHIER-REQ_ID, sy-vline,
  WA_MSSBLOCKINGLOCKHIER-WAIT_SEC, sy-vline,
  WA_MSSBLOCKINGLOCKHIER-SQL_TEXT, sy-vline,
  WA_MSSBLOCKINGLOCKHIER-WAIT_TYPE, sy-vline,
  WA_MSSBLOCKINGLOCKHIER-WAIT_RES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MSSBLOCKINGLOCKHIER 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_MSSBLOCKINGLOCKHIER 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_MSSBLOCKINGLOCKHIER INTO WA_MSSBLOCKINGLOCKHIER.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_MSSBLOCKINGLOCKHIER_STR, 
TOPSID TYPE STRING,
LCKLEVEL TYPE STRING,
HOSTNAME TYPE STRING,
PROGNAME TYPE STRING,
SESS_ID TYPE STRING,
BLK_SESS_ID TYPE STRING,
REQ_ID TYPE STRING,
WAIT_SEC TYPE STRING,
SQL_TEXT TYPE STRING,
WAIT_TYPE TYPE STRING,
WAIT_RES TYPE STRING,
COMMAND TYPE STRING,
LOCKSTAT TYPE STRING,
SQLHANDLE TYPE STRING,
STMT_START_OFFSET TYPE STRING,
STMT_END_OFFSET TYPE STRING,
PLAN_HANDLE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MSSBLOCKINGLOCKHIER_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_MSSBLOCKINGLOCKHIER_STR-TOPSID sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-LCKLEVEL sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-HOSTNAME sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-PROGNAME sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-SESS_ID sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-BLK_SESS_ID sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-REQ_ID sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-WAIT_SEC sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-SQL_TEXT sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-WAIT_TYPE sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-WAIT_RES sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-COMMAND sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-LOCKSTAT sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-SQLHANDLE sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-STMT_START_OFFSET sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-STMT_END_OFFSET sy-vline 
WA_MSSBLOCKINGLOCKHIER_STR-PLAN_HANDLE sy-vline      INTO ld_text SEPARATED BY SPACE.

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