ABAP Select data from SAP table ORA_PERFORMANCE_DB_STRUCTURE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ORA_PERFORMANCE_DB_STRUCTURE
*  INTO TABLE @DATA(IT_ORA_PERFORMANCE_DB_STRUCTURE2).
*--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_ORA_PERFORMANCE_DB_STRUCTURE INDEX 1 INTO DATA(WA_ORA_PERFORMANCE_DB_STRUCTURE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ORA_PERFORMANCE_DB_STRUCTURE>-INST_ID = 1.
<ORA_PERFORMANCE_DB_STRUCTURE>-WEEKDAY = 1.
<ORA_PERFORMANCE_DB_STRUCTURE>-SNAPSHOT_DATE = 1.
<ORA_PERFORMANCE_DB_STRUCTURE>-SNAPSHOT_TIME = 1.
<ORA_PERFORMANCE_DB_STRUCTURE>-USER_CALLS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ORA_PERFORMANCE_DB_STRUCTURE-REC_CALLS, sy-vline,
  WA_ORA_PERFORMANCE_DB_STRUCTURE-USER_REC_CALLS, sy-vline,
  WA_ORA_PERFORMANCE_DB_STRUCTURE-USER_COMMITS, sy-vline,
  WA_ORA_PERFORMANCE_DB_STRUCTURE-USER_ROLLBACKS, sy-vline,
  WA_ORA_PERFORMANCE_DB_STRUCTURE-PARSERS, sy-vline,
  WA_ORA_PERFORMANCE_DB_STRUCTURE-READS_USER_CALLS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ORA_PERFORMANCE_DB_STRUCTURE 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_ORA_PERFORMANCE_DB_STRUCTURE 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_ORA_PERFORMANCE_DB_STRUCTURE INTO WA_ORA_PERFORMANCE_DB_STRUCTURE.


*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_ORA_PERFORMANCE_DB_STRUCTURE_STR, 
INST_ID TYPE STRING,
WEEKDAY TYPE STRING,
SNAPSHOT_DATE TYPE STRING,
SNAPSHOT_TIME TYPE STRING,
USER_CALLS TYPE STRING,
REC_CALLS TYPE STRING,
USER_REC_CALLS TYPE STRING,
USER_COMMITS TYPE STRING,
USER_ROLLBACKS TYPE STRING,
PARSERS TYPE STRING,
READS_USER_CALLS TYPE STRING,
LOGICAL_READS TYPE STRING,
PHYSICAL_READS TYPE STRING,
PHYS_READS_DIR TYPE STRING,
PHYS_R_DIR_LOB TYPE STRING,
BUFFER_QUALITY TYPE STRING,
PHYS_WRITES TYPE STRING,
T_FETCH_ROWID TYPE STRING,
T_FET_CON_ROW TYPE STRING,
SCAN_ROWS_GOT TYPE STRING,
SC_BLOCKS_GOT TYPE STRING,
REDO_BLO_WRIT TYPE STRING,
REDO_WR_TIME TYPE STRING,
AVG_R_WR_TIME TYPE STRING,
BUF_BUSY_WAITS TYPE STRING,
BUF_BUSY_W_TIM TYPE STRING,
AVG_BUF_B_W_TI TYPE STRING,
FULL_TAB_SCAN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ORA_PERFORMANCE_DB_STRUCTURE_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_ORA_PERFORMANCE_DB_STRUCTURE_STR-INST_ID sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-WEEKDAY sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-SNAPSHOT_DATE sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-SNAPSHOT_TIME sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-USER_CALLS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-REC_CALLS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-USER_REC_CALLS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-USER_COMMITS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-USER_ROLLBACKS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-PARSERS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-READS_USER_CALLS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-LOGICAL_READS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-PHYSICAL_READS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-PHYS_READS_DIR sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-PHYS_R_DIR_LOB sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-BUFFER_QUALITY sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-PHYS_WRITES sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-T_FETCH_ROWID sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-T_FET_CON_ROW sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-SCAN_ROWS_GOT sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-SC_BLOCKS_GOT sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-REDO_BLO_WRIT sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-REDO_WR_TIME sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-AVG_R_WR_TIME sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-BUF_BUSY_WAITS sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-BUF_BUSY_W_TIM sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-AVG_BUF_B_W_TI sy-vline 
WA_ORA_PERFORMANCE_DB_STRUCTURE_STR-FULL_TAB_SCAN sy-vline      INTO ld_text SEPARATED BY SPACE.

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