ABAP Select data from SAP table DB6PMCTBS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6PMCTBS 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 DB6PMCTBS. 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 DB6PMCTBS 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_DB6PMCTBS TYPE STANDARD TABLE OF DB6PMCTBS,
      WA_DB6PMCTBS TYPE DB6PMCTBS,
      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: <DB6PMCTBS> TYPE DB6PMCTBS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6PMCTBS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6PMCTBS
  INTO TABLE IT_DB6PMCTBS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6PMCTBS
*  INTO TABLE @DATA(IT_DB6PMCTBS2).
*--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_DB6PMCTBS INDEX 1 INTO DATA(WA_DB6PMCTBS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6PMCTBS ASSIGNING <DB6PMCTBS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6PMCTBS>-COMPTIME = 1.
<DB6PMCTBS>-DBMSTRTTME = 1.
<DB6PMCTBS>-TBS_ID = 1.
<DB6PMCTBS>-TBS_NAME = 1.
<DB6PMCTBS>-PARTITN = 1.

ENDLOOP.

LOOP AT IT_DB6PMCTBS INTO WA_DB6PMCTBS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6PMCTBS-TBS_TYPE, sy-vline,
  WA_DB6PMCTBS-TOTALKB, sy-vline,
  WA_DB6PMCTBS-TOTALPAGES, sy-vline,
  WA_DB6PMCTBS-USABLEKB, sy-vline,
  WA_DB6PMCTBS-USABLEPGS, sy-vline,
  WA_DB6PMCTBS-USEDKB, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6PMCTBS 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_DB6PMCTBS 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_DB6PMCTBS INTO WA_DB6PMCTBS.


*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_DB6PMCTBS_STR, 
COMPTIME TYPE STRING,
DBMSTRTTME TYPE STRING,
TBS_ID TYPE STRING,
TBS_NAME TYPE STRING,
PARTITN TYPE STRING,
TBS_TYPE TYPE STRING,
TOTALKB TYPE STRING,
TOTALPAGES TYPE STRING,
USABLEKB TYPE STRING,
USABLEPGS TYPE STRING,
USEDKB TYPE STRING,
USEDPAGES TYPE STRING,
PCTUSEDKB TYPE STRING,
FREEKB TYPE STRING,
FREEPAGES TYPE STRING,
PCTFREEKB TYPE STRING,
PAGESIZE TYPE STRING,
HGHWTRMRK TYPE STRING,
EXTSIZE TYPE STRING,
PF_SZ TYPE STRING,
NUM_CONT TYPE STRING,
NUM_CONT_DLT TYPE STRING,
CONTENTS TYPE STRING,
TBSSTATE TYPE STRING,
AUTOSTOR TYPE STRING,
AUTORESIZ TYPE STRING,
INITSIZ TYPE STRING,
CURRSIZ TYPE STRING,
INCRSIZABS TYPE STRING,
INCRSIZPCT TYPE STRING,
LASTRSZDAT TYPE STRING,
LASTRSZTIM 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,
TBSP_LAST_RESIZE_TIME TYPE STRING,
PF_SIZE_IMAGE TYPE STRING,
TOTALKB_DELTA TYPE STRING,
USEDKB_DELTA TYPE STRING,
PF_SZ_CURRENT TYPE STRING,
FS_FREE_SIZE_MB TYPE STRING,
TOTAL_FREE_MB TYPE STRING,
TOTAL_USED_PERCENT TYPE STRING,
NUM_TABLES TYPE STRING,
NUM_TABLES_DLT TYPE STRING,
NUM_INDEXES TYPE STRING,
NUM_INDEXES_DLT TYPE STRING,
TOTALKB_GB TYPE STRING,
TOTALKB_KB TYPE STRING,
USABLEKB_KB TYPE STRING,
USEDKB_KB TYPE STRING,
FREEKB_KB TYPE STRING,
USEDKB_DELTA_KB TYPE STRING,
TOTALKB_DELTA_KB TYPE STRING,
TOTALKB_DELTA_MB TYPE STRING,
TOTAL_FREE_GB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6PMCTBS_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_DB6PMCTBS_STR-COMPTIME sy-vline 
WA_DB6PMCTBS_STR-DBMSTRTTME sy-vline 
WA_DB6PMCTBS_STR-TBS_ID sy-vline 
WA_DB6PMCTBS_STR-TBS_NAME sy-vline 
WA_DB6PMCTBS_STR-PARTITN sy-vline 
WA_DB6PMCTBS_STR-TBS_TYPE sy-vline 
WA_DB6PMCTBS_STR-TOTALKB sy-vline 
WA_DB6PMCTBS_STR-TOTALPAGES sy-vline 
WA_DB6PMCTBS_STR-USABLEKB sy-vline 
WA_DB6PMCTBS_STR-USABLEPGS sy-vline 
WA_DB6PMCTBS_STR-USEDKB sy-vline 
WA_DB6PMCTBS_STR-USEDPAGES sy-vline 
WA_DB6PMCTBS_STR-PCTUSEDKB sy-vline 
WA_DB6PMCTBS_STR-FREEKB sy-vline 
WA_DB6PMCTBS_STR-FREEPAGES sy-vline 
WA_DB6PMCTBS_STR-PCTFREEKB sy-vline 
WA_DB6PMCTBS_STR-PAGESIZE sy-vline 
WA_DB6PMCTBS_STR-HGHWTRMRK sy-vline 
WA_DB6PMCTBS_STR-EXTSIZE sy-vline 
WA_DB6PMCTBS_STR-PF_SZ sy-vline 
WA_DB6PMCTBS_STR-NUM_CONT sy-vline 
WA_DB6PMCTBS_STR-NUM_CONT_DLT sy-vline 
WA_DB6PMCTBS_STR-CONTENTS sy-vline 
WA_DB6PMCTBS_STR-TBSSTATE sy-vline 
WA_DB6PMCTBS_STR-AUTOSTOR sy-vline 
WA_DB6PMCTBS_STR-AUTORESIZ sy-vline 
WA_DB6PMCTBS_STR-INITSIZ sy-vline 
WA_DB6PMCTBS_STR-CURRSIZ sy-vline 
WA_DB6PMCTBS_STR-INCRSIZABS sy-vline 
WA_DB6PMCTBS_STR-INCRSIZPCT sy-vline 
WA_DB6PMCTBS_STR-LASTRSZDAT sy-vline 
WA_DB6PMCTBS_STR-LASTRSZTIM sy-vline 
WA_DB6PMCTBS_STR-LASTRSZFAI sy-vline 
WA_DB6PMCTBS_STR-MAX_SIZE sy-vline 
WA_DB6PMCTBS_STR-FS_CACHING sy-vline 
WA_DB6PMCTBS_STR-TBSP_CUR_POOL_ID sy-vline 
WA_DB6PMCTBS_STR-TBSP_NXT_POOL_ID sy-vline 
WA_DB6PMCTBS_STR-TBSP_PENDING_FREE_PAGES sy-vline 
WA_DB6PMCTBS_STR-TBSP_MIN_RECOVERY_TIME sy-vline 
WA_DB6PMCTBS_STR-TBSP_NUM_RANGES sy-vline 
WA_DB6PMCTBS_STR-TBSP_PAGE_TOP sy-vline 
WA_DB6PMCTBS_STR-RECLAIMABLE_SPACE_ENABLED sy-vline 
WA_DB6PMCTBS_STR-TBSP_PATHS_DROPPED sy-vline 
WA_DB6PMCTBS_STR-TBSP_LAST_RESIZE_TIME sy-vline 
WA_DB6PMCTBS_STR-PF_SIZE_IMAGE sy-vline 
WA_DB6PMCTBS_STR-TOTALKB_DELTA sy-vline 
WA_DB6PMCTBS_STR-USEDKB_DELTA sy-vline 
WA_DB6PMCTBS_STR-PF_SZ_CURRENT sy-vline 
WA_DB6PMCTBS_STR-FS_FREE_SIZE_MB sy-vline 
WA_DB6PMCTBS_STR-TOTAL_FREE_MB sy-vline 
WA_DB6PMCTBS_STR-TOTAL_USED_PERCENT sy-vline 
WA_DB6PMCTBS_STR-NUM_TABLES sy-vline 
WA_DB6PMCTBS_STR-NUM_TABLES_DLT sy-vline 
WA_DB6PMCTBS_STR-NUM_INDEXES sy-vline 
WA_DB6PMCTBS_STR-NUM_INDEXES_DLT sy-vline 
WA_DB6PMCTBS_STR-TOTALKB_GB sy-vline 
WA_DB6PMCTBS_STR-TOTALKB_KB sy-vline 
WA_DB6PMCTBS_STR-USABLEKB_KB sy-vline 
WA_DB6PMCTBS_STR-USEDKB_KB sy-vline 
WA_DB6PMCTBS_STR-FREEKB_KB sy-vline 
WA_DB6PMCTBS_STR-USEDKB_DELTA_KB sy-vline 
WA_DB6PMCTBS_STR-TOTALKB_DELTA_KB sy-vline 
WA_DB6PMCTBS_STR-TOTALKB_DELTA_MB sy-vline 
WA_DB6PMCTBS_STR-TOTAL_FREE_GB sy-vline      INTO ld_text SEPARATED BY SPACE.

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