Webrox.EntityFrameworkCore.Postgres 2.4.0

Webrox.EntityFrameworkCore

Use the repo on GitHub to create issues and feature requests.

Features

Implement various Linq functions with Entity Framework Core

Note : Use the method IQueryable<T>.AsSubQuery() to use window functions in predicates or sorts.

SQL Method Translations

SubQueries

Supported providers

Setup

SQLServer

using Webrox.EntityFrameworkCore.SqlServer;

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    // SQL Server
    optionsBuilder.UseSqlServer("connectionstring", opts |  
    {
        opts.AddWebroxFeatures();
    });
}

MySQL

using Webrox.EntityFrameworkCore.MySql;

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder.UseMySQL("connectionstring", opts |  
    {
        opts.AddWebroxFeatures();
    });
}

SQLite

using Webrox.EntityFrameworkCore.Sqlite;

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder.UseSqlite("connectionstring", opts |  
    {
        opts.AddWebroxFeatures();
    });
}

PostgreSQL

using Webrox.EntityFrameworkCore.Postgres;

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
    optionsBuilder.UseNpgsql("connectionstring", opts |  
    {
        opts.AddWebroxFeatures();
    });
}

Functions Usage

RowNumber Syntax

EF Functions

using Webrox.EntityFrameworkCore.[Provider];

// simple RowNumber + OrderBy
context.Table1.Select(t => new
{
    Id = t.Id,
    RowNumber = EF.Functions.RowNumber(EF.Functions.OrderBy(t.Id))
}

// complex RowNumber + PartitionBy + OrderBy
context.Table1.Select(t =>  new
{
    Id = t.Id,
    RowNumber = EF.Functions.RowNumber(
            EF.Functions.PartitionBy(t.GroupId)
                        .ThenPartitionBy(t.SubGroupId),
            EF.Functions.OrderByDescending(t.Id)
                        .ThenBy(t.SubId)
            )
}

Linq Select syntax

You can also use the function Select((e, index)=>{}) to access RowNumber.

It will not be ordered or partitionned and the parameter "index" is int.

context.Table1.Select((t, index) =>  new
{
    Id = t.Id,
    RowNumber = index
}

Rank Syntax

using Webrox.EntityFrameworkCore.[Provider];

// simple Rank + OrderBy
context.Table1.Select(t => new
{
    Id = t.Id,
    Rank = EF.Functions.Rank(EF.Functions.OrderBy(t.Id))
}

// complex Rank + PartitionBy + OrderBy
context.Table1.Select(t =>  new
{
    Id = t.Id,
    Rank = EF.Functions.Rank(
            EF.Functions.PartitionBy(t.GroupId)
                        .ThenPartitionBy(t.SubGroupId),
            EF.Functions.OrderByDescending(t.Id)
                        .ThenBy(t.SubId)
            )
}

DenseRank Syntax

using Webrox.EntityFrameworkCore.[Provider];

// simple DenseRank + OrderBy
context.Table1.Select(t => new
{
    Id = t.Id,
    DenseRank = EF.Functions.DenseRank(EF.Functions.OrderBy(t.Id))
}

// complex DenseRank + PartitionBy + OrderBy
context.Table1.Select(t =>  new
{
    Id = t.Id,
    DenseRank = EF.Functions.DenseRank(
            EF.Functions.PartitionBy(t.GroupId)
                        .ThenPartitionBy(t.SubGroupId),
            EF.Functions.OrderByDescending(t.Id)
                        .ThenBy(t.SubId)
            )
}

Average Syntax

using Webrox.EntityFrameworkCore.[Provider];

// simple Average + OrderBy
context.Table1.Select(t => new
{
    Id = t.Id,
    Average = EF.Functions.Average(EF.Functions.OrderBy(t.Id))
}

// complex Average + PartitionBy + OrderBy
context.Table1.Select(t =>  new
{
    Id = t.Id,
    Average = EF.Functions.Average(
            EF.Functions.PartitionBy(t.GroupId)
                        .ThenPartitionBy(t.SubGroupId),
            EF.Functions.OrderByDescending(t.Id)
                        .ThenBy(t.SubId)
            )
}

Sum Syntax

using Webrox.EntityFrameworkCore.[Provider];

// simple Sum + OrderBy
context.Table1.Select(t => new
{
    Id = t.Id,
    Sum = EF.Functions.Sum(EF.Functions.OrderBy(t.Id))
}

// complex Sum + PartitionBy + OrderBy
context.Table1.Select(t =>  new
{
    Id = t.Id,
    Sum = EF.Functions.Sum(
            EF.Functions.PartitionBy(t.GroupId)
                        .ThenPartitionBy(t.SubGroupId),
            EF.Functions.OrderByDescending(t.Id)
                        .ThenBy(t.SubId)
            )
}

Min Syntax

using Webrox.EntityFrameworkCore.[Provider];

// simple Min + OrderBy
context.Table1.Select(t => new
{
    Id = t.Id,
    Min = EF.Functions.Min(EF.Functions.OrderBy(t.Id))
}

// complex Min + PartitionBy + OrderBy
context.Table1.Select(t =>  new
{
    Id = t.Id,
    Min = EF.Functions.Min(
            EF.Functions.PartitionBy(t.GroupId)
                        .ThenPartitionBy(t.SubGroupId),
            EF.Functions.OrderByDescending(t.Id)
                        .ThenBy(t.SubId)
            )
}

Max Syntax

using Webrox.EntityFrameworkCore.[Provider];

// simple Max + OrderBy
context.Table1.Select(t => new
{
    Id = t.Id,
    Max = EF.Functions.Max(EF.Functions.OrderBy(t.Id))
}

// complex Max + PartitionBy + OrderBy
context.Table1.Select(t =>  new
{
    Id = t.Id,
    Max = EF.Functions.Max(
            EF.Functions.PartitionBy(t.GroupId)
                        .ThenPartitionBy(t.SubGroupId),
            EF.Functions.OrderByDescending(t.Id)
                        .ThenBy(t.SubId)
            )
}