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Tom Lane e690b95150 Avoid retrieving dummy NULL columns in postgres_fdw. ... This should provide some marginal overall savings, since it surely takes many more cycles for the remote server to deal with the NULL columns than it takes for postgres_fdw not to emit them. But really the reason is to keep the emitted queries from looking quite so silly ...		12 years ago
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postgres_fdw.sql	Avoid retrieving dummy NULL columns in postgres_fdw.	12 years ago