babelfish-for-postgresql / babelfish_extensions / 24144764736

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fix: Deep copy parameter names for prepared statements (#4705)

Currently, when cloning arguments to pltsql functions, we only copy the
pointer to the argument names, which means that when a prepared statement is
stored, the strings containing the parameter names are not retained.

When later executing a prepared statement using its handle, we don't have the
original param names, and so we cannot call them using their arguments.

To fix this, we copy the argument names as well when cloning the struct.

Task: BABEL-6391

Authored-by: Saurav Samantaray <sauravay@amazon.com>

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