Cursor lifecycle

Question

Hi guys,
there is some child cursor in v$sql (x$kglcursor_child). Loads = 1, invalidations = 0.
SQL query is finished, is not locked.
I execute DDL on dependent object, cursor invalidated and disappears from x$kglcursor_child.
When I execute it the second time it again reappears in x$kglcursor_child with loads = 2, invalidations = 1.
And a question: is this cursor deleted from shared pool during invaidation? sure, not, because loads and invalidations calculated right.
The cursor is still in shared pool, but does not show in x$kglcursor_child?
Who knows details?

Answer 1

Aman.... wrote:
793769 wrote:
jgarry wrote:
The cursor doesn't go away in the hope it will be reused. upd:
I asked about internals of process.What sort of internals you are seeking , can you elaborate please?
Aman....?
And a question: is this cursor deleted from shared pool during invaidation? sure, not, because loads and invalidations calculated right.
The cursor is still in shared pool, but does not show in x$kglcursor_child?
Who knows details?Is x$kglcursor_child shows whole child-cursor area or filtered child-cursor area?
How Oracle determine that invalidated cursor and new parsed cursor the same? (when it does new parsing and increase invalidation count)
Oracle found cursor in v$db_object_cache during parsing and compares two cursors (new parsed cursor and invalidated cursor, which still in v$db_object_cache)?
And which relations with v$open_cursor.
Where this process described in deep details? Deeper than in link above.