Class TableAlias

Namespace

NextORM.Core

Assembly

nextorm.core.dll

Column accessors for a table addressed by name instead of by a mapped entity type (the From("table") mode).

public class TableAlias

Inheritance

object

TableAlias

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Extension Methods

EntityBuilderExtensions.AsEntityBuilder<T>(object?)

Properties

this[string]

Gets the strongly typed accessor for columnName, or sets a value on the column. Like the other members it is only meaningful inside a query expression.

public TableColumn this[string columnName] { get; set; }

Parameters

columnName string

Name of the column to read or write.

Property Value

TableColumn

Methods

GetBoolean(string)

Reads columnName as a Boolean in a query expression.

public bool GetBoolean(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

bool

GetByte(string)

Reads columnName as an 8-bit unsigned integer in a query expression.

public byte GetByte(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

byte

GetBytes(string)

Reads columnName as a byte array in a query expression.

public byte[] GetBytes(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

byte[]

GetColumn(string)

Reads columnName as an untyped object in a query expression.

public object GetColumn(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

object

GetDateTime(string)

Reads columnName as a date/time value in a query expression.

public DateTime GetDateTime(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

DateTime

GetDecimal(string)

Reads columnName as a decimal value in a query expression.

public decimal GetDecimal(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

decimal

GetDouble(string)

Reads columnName as a double-precision number in a query expression.

public double GetDouble(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

double

GetGuid(string)

Reads columnName as a GUID in a query expression.

public Guid GetGuid(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

Guid

GetInt16(string)

Reads columnName as a 16-bit integer in a query expression.

public short GetInt16(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

short

GetInt32(string)

Reads columnName as a 32-bit integer in a query expression.

public int GetInt32(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

int

GetInt64(string)

Reads columnName as a 64-bit integer in a query expression.

public long GetInt64(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

long

GetNullableBoolean(string)

Reads columnName as a nullable Boolean (null for a NULL value).

public bool? GetNullableBoolean(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

bool?

GetNullableByte(string)

Reads columnName as a nullable 8-bit unsigned integer (null for a NULL value).

public byte? GetNullableByte(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

byte?

GetNullableBytes(string)

Reads columnName as a nullable byte array (null for a NULL value).

public byte[]? GetNullableBytes(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

byte[]

GetNullableDateTime(string)

Reads columnName as a nullable date/time value (null for a NULL value).

public DateTime? GetNullableDateTime(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

DateTime?

GetNullableDecimal(string)

Reads columnName as a nullable decimal value (null for a NULL value).

public decimal? GetNullableDecimal(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

decimal?

GetNullableDouble(string)

Reads columnName as a nullable double-precision number (null for a NULL value).

public double? GetNullableDouble(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

double?

GetNullableGuid(string)

Reads columnName as a nullable GUID (null for a NULL value).

public Guid? GetNullableGuid(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

Guid?

GetNullableInt16(string)

Reads columnName as a nullable 16-bit integer (null for a NULL value).

public short? GetNullableInt16(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

short?

GetNullableInt32(string)

Reads columnName as a nullable 32-bit integer (null for a NULL value).

public int? GetNullableInt32(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

int?

GetNullableInt64(string)

Reads columnName as a nullable 64-bit integer (null for a NULL value).

public long? GetNullableInt64(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

long?

GetNullableSingle(string)

Reads columnName as a nullable single-precision number (null for a NULL value).

public float? GetNullableSingle(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

float?

GetNullableString(string)

Reads columnName as a nullable string (null for a NULL value).

public string? GetNullableString(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

string

GetSingle(string)

Reads columnName as a single-precision number in a query expression.

public float GetSingle(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

float

GetStream(string)

Selects columnName as a streaming binary column in a query expression. This member is a query-expression marker only: the expression visitor recognises the call by its MethodInfo and never invokes it. The projected column is read by the ToStream terminal (a single LOB column) or by a row projection consumed by ToAsyncEnumerable, both of which open the provider's GetStream accessor instead of buffering the value. Invoking the member outside such a query throws.

public Stream GetStream(string columnName)

Parameters

columnName string

Name of the binary column to stream.

Returns

Stream

Never returns; the call is only valid inside a query expression.

Remarks

The resulting stream is valid only until the enumerator advances to the next row (MoveNext): the underlying reader is owned by the enumerator/command, so the value must be consumed before the next step. On SQLite the command appends a trailing rowid locator, so the source must be a rowid-bearing table; a provider without sequential access throws NotSupportedException when the query is executed.

Exceptions

NotSupportedException

Always thrown when the member is invoked directly rather than translated by a streaming terminal.

GetString(string)

Reads columnName as a string in a query expression.

public string GetString(string columnName)

Parameters

columnName string

Name of the column to read.

Returns

string

GetTextReader(string)

Selects columnName as a streaming text column in a query expression. This member is a query-expression marker only: the expression visitor recognises the call by its MethodInfo and never invokes it. The projected column is read by the ToTextReader terminal (a single LOB column) or by a row projection consumed by ToAsyncEnumerable, both of which open the provider's GetTextReader accessor instead of buffering the value. Invoking the member outside such a query throws.

public TextReader GetTextReader(string columnName)

Parameters

columnName string

Name of the text column to stream.

Returns

TextReader

Never returns; the call is only valid inside a query expression.

Remarks

The resulting reader is valid only until the enumerator advances to the next row (MoveNext): the underlying reader is owned by the enumerator/command, so the value must be consumed before the next step. A provider without sequential access throws NotSupportedException when the query is executed. Chunked character reads (GetChars) are intentionally not exposed yet: they need the provider's buffer/offset overload, which is tracked separately (#100).

Exceptions

NotSupportedException

Always thrown when the member is invoked directly rather than translated by a streaming terminal.