ABAP Select data from SAP table DB6PMCIDX into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB6PMCIDX 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 DB6PMCIDX. 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 DB6PMCIDX 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_DB6PMCIDX TYPE STANDARD TABLE OF DB6PMCIDX,
      WA_DB6PMCIDX TYPE DB6PMCIDX,
      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: <DB6PMCIDX> TYPE DB6PMCIDX.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB6PMCIDX.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB6PMCIDX
  INTO TABLE IT_DB6PMCIDX.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB6PMCIDX
*  INTO TABLE @DATA(IT_DB6PMCIDX2).
*--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_DB6PMCIDX INDEX 1 INTO DATA(WA_DB6PMCIDX2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB6PMCIDX ASSIGNING <DB6PMCIDX>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB6PMCIDX>-IDXSCHEMA = 1.
<DB6PMCIDX>-INDEXNAME = 1.
<DB6PMCIDX>-RCKTSPACE = 1.
<DB6PMCIDX>-SYSNLEAF = 1.
<DB6PMCIDX>-SYSNLEVELS = 1.

ENDLOOP.

LOOP AT IT_DB6PMCIDX INTO WA_DB6PMCIDX.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB6PMCIDX-SYS1STKCD, sy-vline,
  WA_DB6PMCIDX-SYS1ST2KCD, sy-vline,
  WA_DB6PMCIDX-SYS1ST3KCD, sy-vline,
  WA_DB6PMCIDX-SYS1ST4KCD, sy-vline,
  WA_DB6PMCIDX-SYSFULLKCD, sy-vline,
  WA_DB6PMCIDX-SYSCSTRATI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB6PMCIDX 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_DB6PMCIDX 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_DB6PMCIDX INTO WA_DB6PMCIDX.


*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_DB6PMCIDX_STR, 
IDXSCHEMA TYPE STRING,
INDEXNAME TYPE STRING,
RCKTSPACE TYPE STRING,
SYSNLEAF TYPE STRING,
SYSNLEVELS TYPE STRING,
SYS1STKCD TYPE STRING,
SYS1ST2KCD TYPE STRING,
SYS1ST3KCD TYPE STRING,
SYS1ST4KCD TYPE STRING,
SYSFULLKCD TYPE STRING,
SYSCSTRATI TYPE STRING,
SYSCSTFACT TYPE STRING,
SYSSEQ_PGS TYPE STRING,
SYSDENSITY TYPE STRING,
SYSSTATDAT TYPE STRING,
SYSSTATTIM TYPE STRING,
RCKTOTALKB TYPE STRING,
PCTFREE TYPE STRING,
INDEXTYPE TYPE STRING,
DIMENSIONSEQ TYPE STRING,
INDEXTYPE_TEXT TYPE STRING,
COMPRESSION TYPE STRING,
PCTPAGESSAVED TYPE STRING,
LASTUSED TYPE STRING,
REVERSE_SCANS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB6PMCIDX_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_DB6PMCIDX_STR-IDXSCHEMA sy-vline 
WA_DB6PMCIDX_STR-INDEXNAME sy-vline 
WA_DB6PMCIDX_STR-RCKTSPACE sy-vline 
WA_DB6PMCIDX_STR-SYSNLEAF sy-vline 
WA_DB6PMCIDX_STR-SYSNLEVELS sy-vline 
WA_DB6PMCIDX_STR-SYS1STKCD sy-vline 
WA_DB6PMCIDX_STR-SYS1ST2KCD sy-vline 
WA_DB6PMCIDX_STR-SYS1ST3KCD sy-vline 
WA_DB6PMCIDX_STR-SYS1ST4KCD sy-vline 
WA_DB6PMCIDX_STR-SYSFULLKCD sy-vline 
WA_DB6PMCIDX_STR-SYSCSTRATI sy-vline 
WA_DB6PMCIDX_STR-SYSCSTFACT sy-vline 
WA_DB6PMCIDX_STR-SYSSEQ_PGS sy-vline 
WA_DB6PMCIDX_STR-SYSDENSITY sy-vline 
WA_DB6PMCIDX_STR-SYSSTATDAT sy-vline 
WA_DB6PMCIDX_STR-SYSSTATTIM sy-vline 
WA_DB6PMCIDX_STR-RCKTOTALKB sy-vline 
WA_DB6PMCIDX_STR-PCTFREE sy-vline 
WA_DB6PMCIDX_STR-INDEXTYPE sy-vline 
WA_DB6PMCIDX_STR-DIMENSIONSEQ sy-vline 
WA_DB6PMCIDX_STR-INDEXTYPE_TEXT sy-vline 
WA_DB6PMCIDX_STR-COMPRESSION sy-vline 
WA_DB6PMCIDX_STR-PCTPAGESSAVED sy-vline 
WA_DB6PMCIDX_STR-LASTUSED sy-vline 
WA_DB6PMCIDX_STR-REVERSE_SCANS sy-vline      INTO ld_text SEPARATED BY SPACE.

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