Re: [I] Document PREPARE statements [datafusion]

["dhegberg (via GitHub)" <gi...@apache.org>]

dhegberg commented on issue #13570:
URL: https://github.com/apache/datafusion/issues/13570#issuecomment-2647102910

   I've started to put together some basic documentation for prepared statements, but when generating examples I'm struggling to use named parameters.
   
   Using `SessionContext::sql()` for example will hit  [this](https://github.com/apache/datafusion/blob/603721d38ef9f187deaf76664e7b1679e44a90cd/datafusion/sql/src/expr/value.rs#L124) validation ensuring a `$1` style placeholder is used rather than `:name`.
   
   Creating a logical plan from the SQL string has a similar issue, preventing the user from later calling `replace_params_with_values`.


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