ABAP Select data from SAP table GVD_LIBRARYCACHE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GVD_LIBRARYCACHE
*  INTO TABLE @DATA(IT_GVD_LIBRARYCACHE2).
*--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_GVD_LIBRARYCACHE INDEX 1 INTO DATA(WA_GVD_LIBRARYCACHE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GVD_LIBRARYCACHE>-SNAPSHOT_ID = 1.
<GVD_LIBRARYCACHE>-INST_ID = 1.
<GVD_LIBRARYCACHE>-NAMESPACE = 1.
<GVD_LIBRARYCACHE>-GETS = 1.
<GVD_LIBRARYCACHE>-GETHITS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GVD_LIBRARYCACHE-GETHITRATIO, sy-vline,
  WA_GVD_LIBRARYCACHE-PINS, sy-vline,
  WA_GVD_LIBRARYCACHE-PINHITS, sy-vline,
  WA_GVD_LIBRARYCACHE-PINHITRATIO, sy-vline,
  WA_GVD_LIBRARYCACHE-RELOADS, sy-vline,
  WA_GVD_LIBRARYCACHE-INVALIDATIONS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GVD_LIBRARYCACHE 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_GVD_LIBRARYCACHE 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_GVD_LIBRARYCACHE INTO WA_GVD_LIBRARYCACHE.


*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_GVD_LIBRARYCACHE_STR, 
SNAPSHOT_ID TYPE STRING,
INST_ID TYPE STRING,
NAMESPACE TYPE STRING,
GETS TYPE STRING,
GETHITS TYPE STRING,
GETHITRATIO TYPE STRING,
PINS TYPE STRING,
PINHITS TYPE STRING,
PINHITRATIO TYPE STRING,
RELOADS TYPE STRING,
INVALIDATIONS TYPE STRING,
DLM_LOCK_REQUEST TYPE STRING,
DLM_PIN_REQUESTS TYPE STRING,
DLM_PIN_RELEASES TYPE STRING,
DLM_INV_REQUESTS TYPE STRING,
DLM_INV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GVD_LIBRARYCACHE_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_GVD_LIBRARYCACHE_STR-SNAPSHOT_ID sy-vline 
WA_GVD_LIBRARYCACHE_STR-INST_ID sy-vline 
WA_GVD_LIBRARYCACHE_STR-NAMESPACE sy-vline 
WA_GVD_LIBRARYCACHE_STR-GETS sy-vline 
WA_GVD_LIBRARYCACHE_STR-GETHITS sy-vline 
WA_GVD_LIBRARYCACHE_STR-GETHITRATIO sy-vline 
WA_GVD_LIBRARYCACHE_STR-PINS sy-vline 
WA_GVD_LIBRARYCACHE_STR-PINHITS sy-vline 
WA_GVD_LIBRARYCACHE_STR-PINHITRATIO sy-vline 
WA_GVD_LIBRARYCACHE_STR-RELOADS sy-vline 
WA_GVD_LIBRARYCACHE_STR-INVALIDATIONS sy-vline 
WA_GVD_LIBRARYCACHE_STR-DLM_LOCK_REQUEST sy-vline 
WA_GVD_LIBRARYCACHE_STR-DLM_PIN_REQUESTS sy-vline 
WA_GVD_LIBRARYCACHE_STR-DLM_PIN_RELEASES sy-vline 
WA_GVD_LIBRARYCACHE_STR-DLM_INV_REQUESTS sy-vline 
WA_GVD_LIBRARYCACHE_STR-DLM_INV sy-vline      INTO ld_text SEPARATED BY SPACE.

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