osborne states: June two, 2009 at 6:38 pm It’s quite common to have multiple kid cursors for an individual sql_id. Normally they have the same plan, but It's not unusual to obtain different designs. This takes place typically due to bind variable peeking. A standard scenario will be that a cursor gets invalidated by collecting stats. Another time it receives executed, a different cursor receives made and also the statement gets re-optimized. In case the bind variables are distinct, a different prepare may result. I’m positive you will discover other ways This could certainly happen at the same time, but this a single is rather frequent (specifically in 10g which is overactive in it’s histogram generation, and under active inside the sample sizing it works by using to create them).INSERT statements that use VALUES syntax can insert various rows. To achieve this, consist of multiple lists of comma-separated column values, with lists enclosed in parentheses and separated by commas. Case in point:
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dbms_xplan.display_cursor will let you know if a Profile or Define or Baseline is getting used by a cursor Incidentally. I haven't seen a situation exactly where some executions utilize a Profile and Other folks tend not to. Almost certainly you might be viewing little ones that happen to be no longer valid but still hanging all over.
Warnings suggests the volume of attempts to insert column values that were problematic in a way. Warnings can manifest under any of the next ailments:
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Inserting a value right into a date or time column that is illegitimate for the data kind. The column is about to the appropriate zero worth for the type.
I’ve carried out a handful of other posts that you may want to have a look at. Just try to find “bind variable peeking†and “unstable designsâ€.
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