compile error when building enc_float4_encrypt due to type mismatch

[Kodp]

Environment:

• OS: Ubuntu 22.04.4 LTS in WSL2
• PostgreSQL version: PostgreSQL 16.3 (Ubuntu 16.3-1.pgdg22.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit

Follow the quick-start, enter the HEDB directory and compile（make）. The error is as follows:

[ 57%] Building CXX object integrity_zone/CMakeFiles/hedb.dir/udf/enc_float4.cpp.o
In file included from /home/syh/Reseach/HEDB/src/integrity_zone/include/stdafx.hpp:15,
                 from /home/syh/Reseach/HEDB/src/integrity_zone/include/extension.hpp:4,
                 from /home/syh/Reseach/HEDB/src/integrity_zone/udf/enc_float4.cpp:8:
/home/syh/Reseach/HEDB/src/integrity_zone/udf/enc_float4.cpp: In function ‘Datum enc_float4_encrypt(FunctionCallInfo)’:
/home/syh/Reseach/HEDB/src/integrity_zone/udf/enc_float4.cpp:73:22: error: cannot convert ‘EncFloat*’ to ‘float4’ {aka ‘float’}
   73 |     PG_RETURN_FLOAT4(f);
      |                      ^
      |                      |
      |                      EncFloat*
/usr/include/postgresql/16/server/fmgr.h:366:52: note: in definition of macro ‘PG_RETURN_FLOAT4’
  366 | #define PG_RETURN_FLOAT4(x)  return Float4GetDatum(x)
      |                                                    ^
In file included from /home/syh/Reseach/HEDB/src/integrity_zone/include/stdafx.hpp:14,
                 from /home/syh/Reseach/HEDB/src/integrity_zone/include/extension.hpp:4,
                 from /home/syh/Reseach/HEDB/src/integrity_zone/udf/enc_float4.cpp:8:
/usr/include/postgresql/16/server/postgres.h:475:23: note:   initializing argument 1 of ‘Datum Float4GetDatum(float4)’
  475 | Float4GetDatum(float4 X)
      |                ~~~~~~~^
gmake[3]: *** [integrity_zone/CMakeFiles/hedb.dir/build.make:258: integrity_zone/CMakeFiles/hedb.dir/udf/enc_float4.cpp.o] Error 1
gmake[3]: Leaving directory '/home/syh/Reseach/HEDB/build'
gmake[2]: *** [CMakeFiles/Makefile2:209: integrity_zone/CMakeFiles/hedb.dir/all] Error 2
gmake[2]: Leaving directory '/home/syh/Reseach/HEDB/build'
gmake[1]: *** [Makefile:136: all] Error 2
gmake[1]: Leaving directory '/home/syh/Reseach/HEDB/build'
make: *** [Makefile:7: build] Error 2

Error code fragment：

Datum enc_float4_encrypt(PG_FUNCTION_ARGS)
{
    float src = PG_GETARG_FLOAT4(0);
    EncFloat* f = (EncFloat*)palloc0(sizeof(EncFloat));
    int error = enc_float_encrypt(src, f);
    if (error) print_error("%s %d", __func__, error);
    PG_RETURN_FLOAT4(f);
}

No type conversion here? I don't know how to fix it.

[Maxul]

You may downgrade your PostgreSQL to 14 and try again.