presto-hive/src/main/java/io/prestosql/plugin/hive/coercions/DoubleToFloatCoercer.java/DoubleToFloatCoercer/applyCoercedValue
class DoubleToFloatCoercer:    @Override
    protected void applyCoercedValue(BlockBuilder blockBuilder, Block block, int position)
    {
        REAL.writeLong(blockBuilder, floatToRawIntBits((float) DOUBLE.getDouble(block, position)));
    }