[PGSQL] Linq2db inserts incorrect value into postgre date column

linq2db 3.1.5, PG SQL 12.2.

Linq2db inserts incorrect value into postgre date column. As example, value 2020-10-21 inserted as 2020-10-20.

Steps to reproduce

create script:

CREATE TABLE test."Samples"
(
    "Id" uuid NOT NULL,
    "Day" date NOT NULL,
    "UpdatedOn" timestamp with time zone NOT NULL,
    CONSTRAINT "PK_Samples" PRIMARY KEY ("Id")
)

table definition:

	[Table(Schema="test", Name="Samples")]
	public partial class Sample
	{
		[PrimaryKey, NotNull] public Guid           Id              { get; set; } // uuid

		[Column,     NotNull] public DateTimeOffset Day             { get; set; } // date

		[Column,     NotNull] public DateTimeOffset UpdatedOn       { get; set; } // timestamp (6) with time zone
	}

test code:

		[Test]
		public async Task DateTimeOffsetTests_Ok()
		{
			await using var db = _dbFactory();

			var now = DateTimeOffset.Now;
			var today = now.TruncateTime();
			var sample = new Sample
			{
				Id = Guid.NewGuid(),
				Day = today,
				UpdatedOn = now
			};

			await db.InsertAsync(sample);

			var sample2 = await db.Samples.FirstAsync(x => x.Id == sample.Id);

			sample2.Day.Should().Be(today);
			sample2.UpdatedOn.Should().BeCloseTo(now, TimeSpan.FromMilliseconds(1));
		}

test output:

Expected sample2.Day to be <2020-10-21 +3h>, but it was <2020-10-20 +3h>.

expected behavior: the test should pass:)

Environment details

linq2db version: 3.1.5 Database Server: PostgreSQL 12.2 (Debian 12.2-2.pgdg100+1) Database Provider: PostgreSQLVersion.v95 Operating system: Debian 12.2-2 .NET Framework: 3.1.402

[sdanyliv]

Actually it is better to cache, for memory and performance reasons.

Can we close an issue?

[sdanyliv]

Prepare MappingSchema and pass it to DataConnection constructor or call AddMappingSchema