ABAP Select data from SAP table DB6PMSB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6PMSB 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 DB6PMSB. 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 DB6PMSB 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_DB6PMSB TYPE STANDARD TABLE OF DB6PMSB,
      WA_DB6PMSB TYPE DB6PMSB,
      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: <DB6PMSB> TYPE DB6PMSB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6PMSB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6PMSB
  INTO TABLE IT_DB6PMSB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6PMSB
*  INTO TABLE @DATA(IT_DB6PMSB2).
*--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_DB6PMSB INDEX 1 INTO DATA(WA_DB6PMSB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6PMSB ASSIGNING <DB6PMSB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6PMSB>-COMPTIME = 1.
<DB6PMSB>-PARTITN = 1.
<DB6PMSB>-BP_NAME = 1.
<DB6PMSB>-CALLERFLAG = 1.
<DB6PMSB>-DBMSTRTTME = 1.

ENDLOOP.

LOOP AT IT_DB6PMSB INTO WA_DB6PMSB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6PMSB-PRGVERS, sy-vline,
  WA_DB6PMSB-IN_DB_ALIA, sy-vline,
  WA_DB6PMSB-DB_NAME, sy-vline,
  WA_DB6PMSB-DB_PATH, sy-vline,
  WA_DB6PMSB-PL_D_LRS, sy-vline,
  WA_DB6PMSB-PL_D_PRS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6PMSB 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_DB6PMSB 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_DB6PMSB INTO WA_DB6PMSB.


*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_DB6PMSB_STR, 
COMPTIME TYPE STRING,
PARTITN TYPE STRING,
BP_NAME TYPE STRING,
CALLERFLAG TYPE STRING,
DBMSTRTTME TYPE STRING,
PRGVERS TYPE STRING,
IN_DB_ALIA TYPE STRING,
DB_NAME TYPE STRING,
DB_PATH TYPE STRING,
PL_D_LRS TYPE STRING,
PL_D_PRS TYPE STRING,
PL_D_WS TYPE STRING,
PL_I_LRS TYPE STRING,
PL_I_PRS TYPE STRING,
PL_I_WS TYPE STRING,
PL_RD_TM TYPE STRING,
PL_WT_TM TYPE STRING,
FLS_CLOSED TYPE STRING,
PL_A_DRSI TYPE STRING,
PL_A_DWS TYPE STRING,
PL_A_IWS TYPE STRING,
PL_A_RTM TYPE STRING,
PL_A_WTM TYPE STRING,
PL_A_DRRQ TYPE STRING,
DIRCT_RDS TYPE STRING,
DIRCT_WTS TYPE STRING,
DIRCT_RRQS TYPE STRING,
DIRCT_WRQS TYPE STRING,
DIRCT_RTM TYPE STRING,
DIRCT_WTM TYPE STRING,
PL_A_IRS TYPE STRING,
PL_D_TE TYPE STRING,
PL_I_TE TYPE STRING,
PL_I_FE TYPE STRING,
PL_D_FE TYPE STRING,
UNREADPFPG TYPE STRING,
PL_TD_LRS TYPE STRING,
PL_TD_PRS TYPE STRING,
PL_TI_LRS TYPE STRING,
PL_TI_PRS TYPE STRING,
PL_A_IRRQ TYPE STRING,
CURBUFFSZ TYPE STRING,
NEWBUFFSZ TYPE STRING,
PGS_FROM_BLOCKIO TYPE STRING,
PGS_FROM_VECTRIO TYPE STRING,
PHYS_PAGE_MAPS TYPE STRING,
PL_ASYNC_XDA_RD TYPE STRING,
PL_ASYNC_XDA_RRQ TYPE STRING,
PL_ASYNC_XDA_WRT TYPE STRING,
PL_NO_VICTIM_BUF TYPE STRING,
POOL_XDA_L_READS TYPE STRING,
POOL_XDA_P_READS TYPE STRING,
POOL_XDA_WRITES TYPE STRING,
PL_TEMP_XDA_L_RD TYPE STRING,
PL_TEMP_XDA_P_RD TYPE STRING,
VECTORED_IOS TYPE STRING,
BP_PAGES_LEFT TYPE STRING,
BP_TBSP_USE_CNT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6PMSB_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_DB6PMSB_STR-COMPTIME sy-vline 
WA_DB6PMSB_STR-PARTITN sy-vline 
WA_DB6PMSB_STR-BP_NAME sy-vline 
WA_DB6PMSB_STR-CALLERFLAG sy-vline 
WA_DB6PMSB_STR-DBMSTRTTME sy-vline 
WA_DB6PMSB_STR-PRGVERS sy-vline 
WA_DB6PMSB_STR-IN_DB_ALIA sy-vline 
WA_DB6PMSB_STR-DB_NAME sy-vline 
WA_DB6PMSB_STR-DB_PATH sy-vline 
WA_DB6PMSB_STR-PL_D_LRS sy-vline 
WA_DB6PMSB_STR-PL_D_PRS sy-vline 
WA_DB6PMSB_STR-PL_D_WS sy-vline 
WA_DB6PMSB_STR-PL_I_LRS sy-vline 
WA_DB6PMSB_STR-PL_I_PRS sy-vline 
WA_DB6PMSB_STR-PL_I_WS sy-vline 
WA_DB6PMSB_STR-PL_RD_TM sy-vline 
WA_DB6PMSB_STR-PL_WT_TM sy-vline 
WA_DB6PMSB_STR-FLS_CLOSED sy-vline 
WA_DB6PMSB_STR-PL_A_DRSI sy-vline 
WA_DB6PMSB_STR-PL_A_DWS sy-vline 
WA_DB6PMSB_STR-PL_A_IWS sy-vline 
WA_DB6PMSB_STR-PL_A_RTM sy-vline 
WA_DB6PMSB_STR-PL_A_WTM sy-vline 
WA_DB6PMSB_STR-PL_A_DRRQ sy-vline 
WA_DB6PMSB_STR-DIRCT_RDS sy-vline 
WA_DB6PMSB_STR-DIRCT_WTS sy-vline 
WA_DB6PMSB_STR-DIRCT_RRQS sy-vline 
WA_DB6PMSB_STR-DIRCT_WRQS sy-vline 
WA_DB6PMSB_STR-DIRCT_RTM sy-vline 
WA_DB6PMSB_STR-DIRCT_WTM sy-vline 
WA_DB6PMSB_STR-PL_A_IRS sy-vline 
WA_DB6PMSB_STR-PL_D_TE sy-vline 
WA_DB6PMSB_STR-PL_I_TE sy-vline 
WA_DB6PMSB_STR-PL_I_FE sy-vline 
WA_DB6PMSB_STR-PL_D_FE sy-vline 
WA_DB6PMSB_STR-UNREADPFPG sy-vline 
WA_DB6PMSB_STR-PL_TD_LRS sy-vline 
WA_DB6PMSB_STR-PL_TD_PRS sy-vline 
WA_DB6PMSB_STR-PL_TI_LRS sy-vline 
WA_DB6PMSB_STR-PL_TI_PRS sy-vline 
WA_DB6PMSB_STR-PL_A_IRRQ sy-vline 
WA_DB6PMSB_STR-CURBUFFSZ sy-vline 
WA_DB6PMSB_STR-NEWBUFFSZ sy-vline 
WA_DB6PMSB_STR-PGS_FROM_BLOCKIO sy-vline 
WA_DB6PMSB_STR-PGS_FROM_VECTRIO sy-vline 
WA_DB6PMSB_STR-PHYS_PAGE_MAPS sy-vline 
WA_DB6PMSB_STR-PL_ASYNC_XDA_RD sy-vline 
WA_DB6PMSB_STR-PL_ASYNC_XDA_RRQ sy-vline 
WA_DB6PMSB_STR-PL_ASYNC_XDA_WRT sy-vline 
WA_DB6PMSB_STR-PL_NO_VICTIM_BUF sy-vline 
WA_DB6PMSB_STR-POOL_XDA_L_READS sy-vline 
WA_DB6PMSB_STR-POOL_XDA_P_READS sy-vline 
WA_DB6PMSB_STR-POOL_XDA_WRITES sy-vline 
WA_DB6PMSB_STR-PL_TEMP_XDA_L_RD sy-vline 
WA_DB6PMSB_STR-PL_TEMP_XDA_P_RD sy-vline 
WA_DB6PMSB_STR-VECTORED_IOS sy-vline 
WA_DB6PMSB_STR-BP_PAGES_LEFT sy-vline 
WA_DB6PMSB_STR-BP_TBSP_USE_CNT sy-vline      INTO ld_text SEPARATED BY SPACE.

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