ABAP Select data from SAP table DB6PMCP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6PMCP 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 DB6PMCP. 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 DB6PMCP 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_DB6PMCP TYPE STANDARD TABLE OF DB6PMCP,
      WA_DB6PMCP TYPE DB6PMCP,
      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: <DB6PMCP> TYPE DB6PMCP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6PMCP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6PMCP
  INTO TABLE IT_DB6PMCP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6PMCP
*  INTO TABLE @DATA(IT_DB6PMCP2).
*--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_DB6PMCP INDEX 1 INTO DATA(WA_DB6PMCP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6PMCP ASSIGNING <DB6PMCP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6PMCP>-COMPTIME = 1.
<DB6PMCP>-PARTITN = 1.
<DB6PMCP>-TBS_ID = 1.
<DB6PMCP>-CALLERFLAG = 1.
<DB6PMCP>-DBMSTRTTME = 1.

ENDLOOP.

LOOP AT IT_DB6PMCP INTO WA_DB6PMCP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6PMCP-PRGVERS, sy-vline,
  WA_DB6PMCP-TBS_NAME, sy-vline,
  WA_DB6PMCP-TBS_TYPE, sy-vline,
  WA_DB6PMCP-CONTENTS, sy-vline,
  WA_DB6PMCP-TBSSTATE, sy-vline,
  WA_DB6PMCP-TOTALPAGES, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6PMCP 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_DB6PMCP 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_DB6PMCP INTO WA_DB6PMCP.


*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_DB6PMCP_STR, 
COMPTIME TYPE STRING,
PARTITN TYPE STRING,
TBS_ID TYPE STRING,
CALLERFLAG TYPE STRING,
DBMSTRTTME TYPE STRING,
PRGVERS TYPE STRING,
TBS_NAME TYPE STRING,
TBS_TYPE TYPE STRING,
CONTENTS TYPE STRING,
TBSSTATE TYPE STRING,
TOTALPAGES TYPE STRING,
USABLEPGS TYPE STRING,
PAGESIZE TYPE STRING,
EXTSIZE TYPE STRING,
PF_SZ TYPE STRING,
NUM_CONT TYPE STRING,
USEDPAGES TYPE STRING,
FREEPAGES TYPE STRING,
HGHWTRMRK TYPE STRING,
AUTOSTOR TYPE STRING,
AUTORESIZ TYPE STRING,
INITSIZ TYPE STRING,
CURRSIZ TYPE STRING,
INCRSIZABS TYPE STRING,
INCRSIZPCT TYPE STRING,
LASTRESIZ TYPE STRING,
LASTRSZFAI TYPE STRING,
MAX_SIZE TYPE STRING,
FS_CACHING TYPE STRING,
TBSP_CUR_POOL_ID TYPE STRING,
TBSP_NXT_POOL_ID TYPE STRING,
TBSP_PENDING_FREE_PAGES TYPE STRING,
TBSP_MIN_RECOVERY_TIME TYPE STRING,
TBSP_NUM_RANGES TYPE STRING,
TBSP_PAGE_TOP TYPE STRING,
RECLAIMABLE_SPACE_ENABLED TYPE STRING,
TBSP_PATHS_DROPPED TYPE STRING,
PF_SZ_CURRENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6PMCP_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_DB6PMCP_STR-COMPTIME sy-vline 
WA_DB6PMCP_STR-PARTITN sy-vline 
WA_DB6PMCP_STR-TBS_ID sy-vline 
WA_DB6PMCP_STR-CALLERFLAG sy-vline 
WA_DB6PMCP_STR-DBMSTRTTME sy-vline 
WA_DB6PMCP_STR-PRGVERS sy-vline 
WA_DB6PMCP_STR-TBS_NAME sy-vline 
WA_DB6PMCP_STR-TBS_TYPE sy-vline 
WA_DB6PMCP_STR-CONTENTS sy-vline 
WA_DB6PMCP_STR-TBSSTATE sy-vline 
WA_DB6PMCP_STR-TOTALPAGES sy-vline 
WA_DB6PMCP_STR-USABLEPGS sy-vline 
WA_DB6PMCP_STR-PAGESIZE sy-vline 
WA_DB6PMCP_STR-EXTSIZE sy-vline 
WA_DB6PMCP_STR-PF_SZ sy-vline 
WA_DB6PMCP_STR-NUM_CONT sy-vline 
WA_DB6PMCP_STR-USEDPAGES sy-vline 
WA_DB6PMCP_STR-FREEPAGES sy-vline 
WA_DB6PMCP_STR-HGHWTRMRK sy-vline 
WA_DB6PMCP_STR-AUTOSTOR sy-vline 
WA_DB6PMCP_STR-AUTORESIZ sy-vline 
WA_DB6PMCP_STR-INITSIZ sy-vline 
WA_DB6PMCP_STR-CURRSIZ sy-vline 
WA_DB6PMCP_STR-INCRSIZABS sy-vline 
WA_DB6PMCP_STR-INCRSIZPCT sy-vline 
WA_DB6PMCP_STR-LASTRESIZ sy-vline 
WA_DB6PMCP_STR-LASTRSZFAI sy-vline 
WA_DB6PMCP_STR-MAX_SIZE sy-vline 
WA_DB6PMCP_STR-FS_CACHING sy-vline 
WA_DB6PMCP_STR-TBSP_CUR_POOL_ID sy-vline 
WA_DB6PMCP_STR-TBSP_NXT_POOL_ID sy-vline 
WA_DB6PMCP_STR-TBSP_PENDING_FREE_PAGES sy-vline 
WA_DB6PMCP_STR-TBSP_MIN_RECOVERY_TIME sy-vline 
WA_DB6PMCP_STR-TBSP_NUM_RANGES sy-vline 
WA_DB6PMCP_STR-TBSP_PAGE_TOP sy-vline 
WA_DB6PMCP_STR-RECLAIMABLE_SPACE_ENABLED sy-vline 
WA_DB6PMCP_STR-TBSP_PATHS_DROPPED sy-vline 
WA_DB6PMCP_STR-PF_SZ_CURRENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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