Re: Initializing Datums for use with SPI_execute_plan

On 2006-09-14, "Jack Orenstein" <jack(dot)orenstein(at)gmail(dot)com> wrote:
> I don't think I explained myself clearly. I have a C string (char*,
> terminating zero) and a byte array (char*, possibly containing zeros,
> and I know the length). I want to obtain Datums wrapping these values
> that will be used to bind varchar and bytea columns, and I'm trying to
> find out how to generate these Datums.

One way:

bytea *my_bytea = (bytea *) palloc(byte_array_len + VARHDRSZ);
memcpy(VARDATA(my_bytea), byte_array, byte_array_len);
VARATT_SIZEP(my_bytea) = byte_array_len + VARHDRSZ;

values[0] = DirectFunctionCall1(textin,CStringGetDatum(yourstring));
values[1] = PointerGetDatum(my_bytea);

SPI_execute_plan...

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Andrew, Supernews
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