ABAP Select data from SAP table DB6PMCM1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6PMCM1 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 DB6PMCM1. 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 DB6PMCM1 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_DB6PMCM1 TYPE STANDARD TABLE OF DB6PMCM1,
      WA_DB6PMCM1 TYPE DB6PMCM1,
      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: <DB6PMCM1> TYPE DB6PMCM1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6PMCM1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6PMCM1
  INTO TABLE IT_DB6PMCM1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6PMCM1
*  INTO TABLE @DATA(IT_DB6PMCM12).
*--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_DB6PMCM1 INDEX 1 INTO DATA(WA_DB6PMCM12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6PMCM1 ASSIGNING <DB6PMCM1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6PMCM1>-COMPTIME = 1.
<DB6PMCM1>-CALLERFLAG = 1.
<DB6PMCM1>-DBMSTRTTME = 1.
<DB6PMCM1>-PRGVERS = 1.
<DB6PMCM1>-AGT_STK_SZ = 1.

ENDLOOP.

LOOP AT IT_DB6PMCM1 INTO WA_DB6PMCM1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6PMCM1-AGENTPRI, sy-vline,
  WA_DB6PMCM1-ASLHEAPSZ, sy-vline,
  WA_DB6PMCM1-AUDITBUFSZ, sy-vline,
  WA_DB6PMCM1-AUTHENTIC, sy-vline,
  WA_DB6PMCM1-BACKBUFSZ, sy-vline,
  WA_DB6PMCM1-COMM_BNDWD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6PMCM1 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_DB6PMCM1 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_DB6PMCM1 INTO WA_DB6PMCM1.


*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_DB6PMCM1_STR, 
COMPTIME TYPE STRING,
CALLERFLAG TYPE STRING,
DBMSTRTTME TYPE STRING,
PRGVERS TYPE STRING,
AGT_STK_SZ TYPE STRING,
AGENTPRI TYPE STRING,
ASLHEAPSZ TYPE STRING,
AUDITBUFSZ TYPE STRING,
AUTHENTIC TYPE STRING,
BACKBUFSZ TYPE STRING,
COMM_BNDWD TYPE STRING,
CN_ELAPSE TYPE STRING,
CPUSPEED TYPE STRING,
DFT_ACCSTR TYPE STRING,
DFT_CLADPT TYPE STRING,
DFT_CL_COM TYPE STRING,
DFT_MONSWI TYPE STRING,
DFT_M_BUFP TYPE STRING,
DFT_M_LOCK TYPE STRING,
DFT_M_SORT TYPE STRING,
DFT_M_STMT TYPE STRING,
DFT_M_TAB TYPE STRING,
DFT_M_UOW TYPE STRING,
DFTDBPATH TYPE STRING,
DIAGLEVEL TYPE STRING,
DIAGPATH TYPE STRING,
DIR_CACHE TYPE STRING,
DIR_OBJ_NM TYPE STRING,
DIR_PTH_NM TYPE STRING,
DIR_TYPE TYPE STRING,
DISCOVER TYPE STRING,
DISCVR_COM TYPE STRING,
DISCVR_IST TYPE STRING,
DOS_RQRIO TYPE STRING,
DRDA_HP_SZ TYPE STRING,
FCM_NM_ANC TYPE STRING,
FCN_NM_BUF TYPE STRING,
FCM_NM_CON TYPE STRING,
FCM_NM_RQB TYPE STRING,
FILESERVER TYPE STRING,
INDEXREC TYPE STRING,
INTRA_PARA TYPE STRING,
IPX_SOCKET TYPE STRING,
DATALINKS TYPE STRING,
FEDERATED TYPE STRING,
CAT_NOAUTH TYPE STRING,
ITDARI_JVM TYPE STRING,
NOTIFYLV TYPE STRING,
DFT_M_TS TYPE STRING,
HEALTH_MON TYPE STRING,
U_SNA_AUTH TYPE STRING,
FED_NOAUTH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6PMCM1_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_DB6PMCM1_STR-COMPTIME sy-vline 
WA_DB6PMCM1_STR-CALLERFLAG sy-vline 
WA_DB6PMCM1_STR-DBMSTRTTME sy-vline 
WA_DB6PMCM1_STR-PRGVERS sy-vline 
WA_DB6PMCM1_STR-AGT_STK_SZ sy-vline 
WA_DB6PMCM1_STR-AGENTPRI sy-vline 
WA_DB6PMCM1_STR-ASLHEAPSZ sy-vline 
WA_DB6PMCM1_STR-AUDITBUFSZ sy-vline 
WA_DB6PMCM1_STR-AUTHENTIC sy-vline 
WA_DB6PMCM1_STR-BACKBUFSZ sy-vline 
WA_DB6PMCM1_STR-COMM_BNDWD sy-vline 
WA_DB6PMCM1_STR-CN_ELAPSE sy-vline 
WA_DB6PMCM1_STR-CPUSPEED sy-vline 
WA_DB6PMCM1_STR-DFT_ACCSTR sy-vline 
WA_DB6PMCM1_STR-DFT_CLADPT sy-vline 
WA_DB6PMCM1_STR-DFT_CL_COM sy-vline 
WA_DB6PMCM1_STR-DFT_MONSWI sy-vline 
WA_DB6PMCM1_STR-DFT_M_BUFP sy-vline 
WA_DB6PMCM1_STR-DFT_M_LOCK sy-vline 
WA_DB6PMCM1_STR-DFT_M_SORT sy-vline 
WA_DB6PMCM1_STR-DFT_M_STMT sy-vline 
WA_DB6PMCM1_STR-DFT_M_TAB sy-vline 
WA_DB6PMCM1_STR-DFT_M_UOW sy-vline 
WA_DB6PMCM1_STR-DFTDBPATH sy-vline 
WA_DB6PMCM1_STR-DIAGLEVEL sy-vline 
WA_DB6PMCM1_STR-DIAGPATH sy-vline 
WA_DB6PMCM1_STR-DIR_CACHE sy-vline 
WA_DB6PMCM1_STR-DIR_OBJ_NM sy-vline 
WA_DB6PMCM1_STR-DIR_PTH_NM sy-vline 
WA_DB6PMCM1_STR-DIR_TYPE sy-vline 
WA_DB6PMCM1_STR-DISCOVER sy-vline 
WA_DB6PMCM1_STR-DISCVR_COM sy-vline 
WA_DB6PMCM1_STR-DISCVR_IST sy-vline 
WA_DB6PMCM1_STR-DOS_RQRIO sy-vline 
WA_DB6PMCM1_STR-DRDA_HP_SZ sy-vline 
WA_DB6PMCM1_STR-FCM_NM_ANC sy-vline 
WA_DB6PMCM1_STR-FCN_NM_BUF sy-vline 
WA_DB6PMCM1_STR-FCM_NM_CON sy-vline 
WA_DB6PMCM1_STR-FCM_NM_RQB sy-vline 
WA_DB6PMCM1_STR-FILESERVER sy-vline 
WA_DB6PMCM1_STR-INDEXREC sy-vline 
WA_DB6PMCM1_STR-INTRA_PARA sy-vline 
WA_DB6PMCM1_STR-IPX_SOCKET sy-vline 
WA_DB6PMCM1_STR-DATALINKS sy-vline 
WA_DB6PMCM1_STR-FEDERATED sy-vline 
WA_DB6PMCM1_STR-CAT_NOAUTH sy-vline 
WA_DB6PMCM1_STR-ITDARI_JVM sy-vline 
WA_DB6PMCM1_STR-NOTIFYLV sy-vline 
WA_DB6PMCM1_STR-DFT_M_TS sy-vline 
WA_DB6PMCM1_STR-HEALTH_MON sy-vline 
WA_DB6PMCM1_STR-U_SNA_AUTH sy-vline 
WA_DB6PMCM1_STR-FED_NOAUTH sy-vline      INTO ld_text SEPARATED BY SPACE.

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