When running the Postgres JDBC tests with this patchset I found dumb mistake in my last patch where I didn't initialize the contents of orig_params correctly. This new patchset fixes that.
v4-0001-Support-prepared-statement-invalidation-when-resu.patch
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v4-0002-Completely-remove-fixed_result-from-CachedPlanSou.patch
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v4-0003-Support-changing-argument-types-of-prepared-state.patch
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