fix binding strings with nulls; update param type tests #147
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Use the
_length
variants of C API functions that take C strings where possible, to handle embedded null characters properly. This was visible through the API in at least one case (binding VARCHARs with embedded nulls). Added a test for this case.Also update the
param_type
tests now that it works in more cases. But I found a new bug in 1.2.0, whereparam_type
returns INVALID for VARCHARs (only). I've confirmed this is a bug in DuckDB and am filing an issue there.