ABAP Select data from SAP table DB6PMCK into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6PMCK 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 DB6PMCK. 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 DB6PMCK 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_DB6PMCK TYPE STANDARD TABLE OF DB6PMCK,
      WA_DB6PMCK TYPE DB6PMCK,
      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: <DB6PMCK> TYPE DB6PMCK.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6PMCK.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6PMCK
  INTO TABLE IT_DB6PMCK.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6PMCK
*  INTO TABLE @DATA(IT_DB6PMCK2).
*--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_DB6PMCK INDEX 1 INTO DATA(WA_DB6PMCK2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6PMCK ASSIGNING <DB6PMCK>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6PMCK>-BACKUPTS = 1.
<DB6PMCK>-BACKUPSEQ = 1.
<DB6PMCK>-PARTITN = 1.
<DB6PMCK>-COMPTIME = 1.
<DB6PMCK>-BACKUPEND = 1.

ENDLOOP.

LOOP AT IT_DB6PMCK INTO WA_DB6PMCK.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6PMCK-FIRSTLOG, sy-vline,
  WA_DB6PMCK-LASTLOG, sy-vline,
  WA_DB6PMCK-LOCATION, sy-vline,
  WA_DB6PMCK-COMMENTS, sy-vline,
  WA_DB6PMCK-BACKUPRC, sy-vline,
  WA_DB6PMCK-NUM_TBS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6PMCK 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_DB6PMCK 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_DB6PMCK INTO WA_DB6PMCK.


*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_DB6PMCK_STR, 
BACKUPTS TYPE STRING,
BACKUPSEQ TYPE STRING,
PARTITN TYPE STRING,
COMPTIME TYPE STRING,
BACKUPEND TYPE STRING,
FIRSTLOG TYPE STRING,
LASTLOG TYPE STRING,
LOCATION TYPE STRING,
COMMENTS TYPE STRING,
BACKUPRC TYPE STRING,
NUM_TBS TYPE STRING,
GRANULAITY TYPE STRING,
BACKUPTYPE TYPE STRING,
BACKUPDEV TYPE STRING,
STATUS TYPE STRING,
EID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6PMCK_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_DB6PMCK_STR-BACKUPTS sy-vline 
WA_DB6PMCK_STR-BACKUPSEQ sy-vline 
WA_DB6PMCK_STR-PARTITN sy-vline 
WA_DB6PMCK_STR-COMPTIME sy-vline 
WA_DB6PMCK_STR-BACKUPEND sy-vline 
WA_DB6PMCK_STR-FIRSTLOG sy-vline 
WA_DB6PMCK_STR-LASTLOG sy-vline 
WA_DB6PMCK_STR-LOCATION sy-vline 
WA_DB6PMCK_STR-COMMENTS sy-vline 
WA_DB6PMCK_STR-BACKUPRC sy-vline 
WA_DB6PMCK_STR-NUM_TBS sy-vline 
WA_DB6PMCK_STR-GRANULAITY sy-vline 
WA_DB6PMCK_STR-BACKUPTYPE sy-vline 
WA_DB6PMCK_STR-BACKUPDEV sy-vline 
WA_DB6PMCK_STR-STATUS sy-vline 
WA_DB6PMCK_STR-EID sy-vline      INTO ld_text SEPARATED BY SPACE.

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