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Since 9.0, the count parameter has only limited the number of tuples actually returned by the executor. It doesn't affect the behavior of INSERT/UPDATE/DELETE unless RETURNING is specified, because without RETURNING, the ModifyTable plan node doesn't return control to execMain.c for each tuple. And we only check the limit at the top level. While this behavioral change was unintentional at the time, discussion of bug #6572 led us to the conclusion that we prefer the new behavior anyway, and so we should just adjust the docs to match rather than change the code. Accordingly, do that. Back-patch as far as 9.0 so that the docs match the code in each branch. |
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