ABAP Select data from SAP table SYBCFG_MEMORY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SYBCFG_MEMORY
*  INTO TABLE @DATA(IT_SYBCFG_MEMORY2).
*--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_SYBCFG_MEMORY INDEX 1 INTO DATA(WA_SYBCFG_MEMORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SYBCFG_MEMORY>-PARAM_NAME = 1.
<SYBCFG_MEMORY>-DEFAULT_VALUE = 1.
<SYBCFG_MEMORY>-MEMORY_USED = 1.
<SYBCFG_MEMORY>-CONFIG_VALUE = 1.
<SYBCFG_MEMORY>-RUN_VALUE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SYBCFG_MEMORY-UNIT, sy-vline,
  WA_SYBCFG_MEMORY-TYPE, sy-vline,
  WA_SYBCFG_MEMORY-INSTANCE_NAME, sy-vline,
  WA_SYBCFG_MEMORY-GROUP_ID, sy-vline,
  WA_SYBCFG_MEMORY-GROUP_NAME, sy-vline,
  WA_SYBCFG_MEMORY-INSTANCEID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SYBCFG_MEMORY 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_SYBCFG_MEMORY 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_SYBCFG_MEMORY INTO WA_SYBCFG_MEMORY.


*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_SYBCFG_MEMORY_STR, 
PARAM_NAME TYPE STRING,
DEFAULT_VALUE TYPE STRING,
MEMORY_USED TYPE STRING,
CONFIG_VALUE TYPE STRING,
RUN_VALUE TYPE STRING,
UNIT TYPE STRING,
TYPE TYPE STRING,
INSTANCE_NAME TYPE STRING,
GROUP_ID TYPE STRING,
GROUP_NAME TYPE STRING,
INSTANCEID TYPE STRING,
PARAM_LABEL TYPE STRING,
PARAM_PARENT TYPE STRING,
PARAM_LEVEL TYPE STRING,
PARAM_ORDER TYPE STRING,
MEMORY_PERCENTAGE TYPE STRING,
KEEP_IN_TOP_N TYPE STRING,
MEMORY_USED_INT TYPE STRING,
MEMORYPOOLCATEGORY TYPE STRING,
MEMORYPOOLNAME TYPE STRING,
POOLTYPE TYPE STRING,
TOTALSIZE_KB TYPE STRING,
TOTALSIZE_DELTA_KB TYPE STRING,
USEDSIZE_KB TYPE STRING,
USEDSIZE_DELTA_KB TYPE STRING,
FREESIZE_KB TYPE STRING,
FREESIZE_DELTA_KB TYPE STRING,
NUMBLOCKS TYPE STRING,
NUMBLOCKS_DELTA TYPE STRING,
NUMSEARCHES TYPE STRING,
NUMRETRIES TYPE STRING,
NUMALLOCS TYPE STRING,
NUMFREES TYPE STRING,
NUMSLEEPS TYPE STRING,
SNAPSHOT_TIMESTAMP TYPE STRING,
TIMESTAMP_FROM TYPE STRING,
TIMESTAMP_TO TYPE STRING,
TIME_PERIOD TYPE STRING,
SOURCE_HOSTNAME TYPE STRING,
CONFIG_OPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SYBCFG_MEMORY_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_SYBCFG_MEMORY_STR-PARAM_NAME sy-vline 
WA_SYBCFG_MEMORY_STR-DEFAULT_VALUE sy-vline 
WA_SYBCFG_MEMORY_STR-MEMORY_USED sy-vline 
WA_SYBCFG_MEMORY_STR-CONFIG_VALUE sy-vline 
WA_SYBCFG_MEMORY_STR-RUN_VALUE sy-vline 
WA_SYBCFG_MEMORY_STR-UNIT sy-vline 
WA_SYBCFG_MEMORY_STR-TYPE sy-vline 
WA_SYBCFG_MEMORY_STR-INSTANCE_NAME sy-vline 
WA_SYBCFG_MEMORY_STR-GROUP_ID sy-vline 
WA_SYBCFG_MEMORY_STR-GROUP_NAME sy-vline 
WA_SYBCFG_MEMORY_STR-INSTANCEID sy-vline 
WA_SYBCFG_MEMORY_STR-PARAM_LABEL sy-vline 
WA_SYBCFG_MEMORY_STR-PARAM_PARENT sy-vline 
WA_SYBCFG_MEMORY_STR-PARAM_LEVEL sy-vline 
WA_SYBCFG_MEMORY_STR-PARAM_ORDER sy-vline 
WA_SYBCFG_MEMORY_STR-MEMORY_PERCENTAGE sy-vline 
WA_SYBCFG_MEMORY_STR-KEEP_IN_TOP_N sy-vline 
WA_SYBCFG_MEMORY_STR-MEMORY_USED_INT sy-vline 
WA_SYBCFG_MEMORY_STR-MEMORYPOOLCATEGORY sy-vline 
WA_SYBCFG_MEMORY_STR-MEMORYPOOLNAME sy-vline 
WA_SYBCFG_MEMORY_STR-POOLTYPE sy-vline 
WA_SYBCFG_MEMORY_STR-TOTALSIZE_KB sy-vline 
WA_SYBCFG_MEMORY_STR-TOTALSIZE_DELTA_KB sy-vline 
WA_SYBCFG_MEMORY_STR-USEDSIZE_KB sy-vline 
WA_SYBCFG_MEMORY_STR-USEDSIZE_DELTA_KB sy-vline 
WA_SYBCFG_MEMORY_STR-FREESIZE_KB sy-vline 
WA_SYBCFG_MEMORY_STR-FREESIZE_DELTA_KB sy-vline 
WA_SYBCFG_MEMORY_STR-NUMBLOCKS sy-vline 
WA_SYBCFG_MEMORY_STR-NUMBLOCKS_DELTA sy-vline 
WA_SYBCFG_MEMORY_STR-NUMSEARCHES sy-vline 
WA_SYBCFG_MEMORY_STR-NUMRETRIES sy-vline 
WA_SYBCFG_MEMORY_STR-NUMALLOCS sy-vline 
WA_SYBCFG_MEMORY_STR-NUMFREES sy-vline 
WA_SYBCFG_MEMORY_STR-NUMSLEEPS sy-vline 
WA_SYBCFG_MEMORY_STR-SNAPSHOT_TIMESTAMP sy-vline 
WA_SYBCFG_MEMORY_STR-TIMESTAMP_FROM sy-vline 
WA_SYBCFG_MEMORY_STR-TIMESTAMP_TO sy-vline 
WA_SYBCFG_MEMORY_STR-TIME_PERIOD sy-vline 
WA_SYBCFG_MEMORY_STR-SOURCE_HOSTNAME sy-vline 
WA_SYBCFG_MEMORY_STR-CONFIG_OPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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