I need to save some blob (arbitrary precision numbers representations) on my
sqlite3 database.

And confused by the function:

const void *sqlite3_column_blob(sqlite3_stmt*, int iCol);

I would expect an output parameter (example type size_t*) to get the size of
the blob, but it is not there.

How can I know the length of the blob to read it correctly?

Thanks,
Paolo
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