internal static DbQueryCommandTree FromValidExpression(MetadataWorkspace metadata, DataSpace dataSpace, DbExpression query)
{
#if DEBUG
return(new DbQueryCommandTree(metadata, dataSpace, query));
#else
return(new DbQueryCommandTree(metadata, dataSpace, query, false));
#endif
}
/// <summary>
/// Constructs a new DbQueryCommandTree that uses the specified metadata workspace.
/// </summary>
/// <param name="metadata"> The metadata workspace that the command tree should use. </param>
/// <param name="dataSpace"> The logical 'space' that metadata in the expressions used in this command tree must belong to. </param>
/// <param name="query">
/// A <see cref="DbExpression" /> that defines the logic of the query.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="metadata" />
/// or
/// <paramref name="query" />
/// is null
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="dataSpace" />
/// does not represent a valid data space
/// </exception>
public DbQueryCommandTree(MetadataWorkspace metadata, DataSpace dataSpace, DbExpression query)
: this(metadata, dataSpace, query, true)
{
}
internal DbIsOfExpression(DbExpressionKind isOfKind, TypeUsage booleanResultType, DbExpression argument, TypeUsage isOfType)
: base(isOfKind, booleanResultType, argument)
{
Debug.Assert(
DbExpressionKind.IsOf == ExpressionKind || DbExpressionKind.IsOfOnly == ExpressionKind,
string.Format(
CultureInfo.InvariantCulture, "Invalid DbExpressionKind used in DbIsOfExpression: {0}",
Enum.GetName(typeof(DbExpressionKind), ExpressionKind)));
Debug.Assert(TypeSemantics.IsBooleanType(booleanResultType), "DbIsOfExpression requires a Boolean result type");
_ofType = isOfType;
}
internal DbLikeExpression(TypeUsage booleanResultType, DbExpression input, DbExpression pattern, DbExpression escape)
: base(DbExpressionKind.Like, booleanResultType)
{
DebugCheck.NotNull(input);
DebugCheck.NotNull(pattern);
DebugCheck.NotNull(escape);
Debug.Assert(
TypeSemantics.IsPrimitiveType(input.ResultType, PrimitiveTypeKind.String),
"DbLikeExpression argument must have a string result type");
Debug.Assert(
TypeSemantics.IsPrimitiveType(pattern.ResultType, PrimitiveTypeKind.String),
"DbLikeExpression pattern must have a string result type");
Debug.Assert(
TypeSemantics.IsPrimitiveType(escape.ResultType, PrimitiveTypeKind.String),
"DbLikeExpression escape must have a string result type");
Debug.Assert(TypeSemantics.IsBooleanType(booleanResultType), "DbLikeExpression must have a Boolean result type");
_argument = input;
_pattern = pattern;
_escape = escape;
}
/// <summary>
/// Called when an <see cref="DbExpression" /> of an otherwise unrecognized type is encountered.
/// </summary>
/// <param name="expression"> The expression </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
/// <exception cref="NotSupportedException">
/// Always thrown if this method is called, since it indicates that
/// <paramref name="expression" />
/// is of an unsupported type
/// </exception>
public override void Visit(DbExpression expression)
{
Check.NotNull(expression, "expression");
throw new NotSupportedException(Strings.Cqt_General_UnsupportedExpression(expression.GetType().FullName));
}
internal DbExceptExpression(TypeUsage resultType, DbExpression left, DbExpression right)
: base(DbExpressionKind.Except, resultType, left, right)
{
Debug.Assert(
ReferenceEquals(resultType, left.ResultType), "DbExceptExpression result type should be result type of left argument");
}
internal DbIsEmptyExpression(TypeUsage booleanResultType, DbExpression argument)
: base(DbExpressionKind.IsEmpty, booleanResultType, argument)
{
Debug.Assert(TypeSemantics.IsBooleanType(booleanResultType), "DbIsEmptyExpression requires a Boolean result type");
}
/// <summary>
/// Convenience method to visit the specified <see cref="DbExpression" />, if non-null.
/// </summary>
/// <param name="expression"> The expression to visit. </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="expression" />
/// is null
/// </exception>
public virtual void VisitExpression(DbExpression expression)
{
// #433613: PreSharp warning 56506: Parameter 'expression' to this public method must be validated: A null-dereference can occur here.
Check.NotNull(expression, "expression");
expression.Accept(this);
}
internal DbComparisonExpression(DbExpressionKind kind, TypeUsage booleanResultType, DbExpression left, DbExpression right)
: base(kind, booleanResultType, left, right)
{
DebugCheck.NotNull(left);
DebugCheck.NotNull(right);
Debug.Assert(TypeSemantics.IsBooleanType(booleanResultType), "DbComparisonExpression result type must be a Boolean type");
Debug.Assert(
DbExpressionKind.Equals == kind ||
DbExpressionKind.LessThan == kind ||
DbExpressionKind.LessThanOrEquals == kind ||
DbExpressionKind.GreaterThan == kind ||
DbExpressionKind.GreaterThanOrEquals == kind ||
DbExpressionKind.NotEquals == kind,
"Invalid DbExpressionKind used in DbComparisonExpression: " + Enum.GetName(typeof(DbExpressionKind), kind)
);
}
internal DbUnionAllExpression(TypeUsage resultType, DbExpression left, DbExpression right)
: base(DbExpressionKind.UnionAll, resultType, left, right)
{
}
internal DbElementExpression(TypeUsage resultType, DbExpression argument, bool unwrapSingleProperty)
: base(DbExpressionKind.Element, resultType, argument)
{
_singlePropertyUnwrapped = unwrapSingleProperty;
}
/// <summary>
/// Constructs a new DbQueryCommandTree that uses the specified metadata workspace.
/// </summary>
/// <param name="metadata"> The metadata workspace that the command tree should use. </param>
/// <param name="dataSpace"> The logical 'space' that metadata in the expressions used in this command tree must belong to. </param>
/// <param name="query">
/// A <see cref="DbExpression" /> that defines the logic of the query.
/// </param>
/// <param name="validate"> When set to false the validation of the tree is turned off. </param>
/// <param name="useDatabaseNullSemantics">A boolean that indicates whether database null semantics are exhibited when comparing
/// two operands, both of which are potentially nullable.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="metadata" />
/// or
/// <paramref name="query" />
/// is null
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="dataSpace" />
/// does not represent a valid data space
/// </exception>
public DbQueryCommandTree(MetadataWorkspace metadata, DataSpace dataSpace, DbExpression query, bool validate, bool useDatabaseNullSemantics)
: this(metadata, dataSpace, query, validate, useDatabaseNullSemantics, false)
{
}
internal static DbQueryCommandTree FromValidExpression(MetadataWorkspace metadata, DataSpace dataSpace, DbExpression query,
bool useDatabaseNullSemantics, bool disableFilterOverProjectionSimplificationForCustomFunctions)
{
return(new DbQueryCommandTree(metadata, dataSpace, query,
#if DEBUG
true,
#else
false,
#endif
useDatabaseNullSemantics,
disableFilterOverProjectionSimplificationForCustomFunctions));
}
/// <summary>
/// Constructs a new DbQueryCommandTree that uses the specified metadata workspace, using database null semantics.
/// </summary>
/// <param name="metadata"> The metadata workspace that the command tree should use. </param>
/// <param name="dataSpace"> The logical 'space' that metadata in the expressions used in this command tree must belong to. </param>
/// <param name="query">
/// A <see cref="DbExpression" /> that defines the logic of the query.
/// </param>
/// <param name="validate"> When set to false the validation of the tree is turned off. </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="metadata" />
/// or
/// <paramref name="query" />
/// is null
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="dataSpace" />
/// does not represent a valid data space
/// </exception>
public DbQueryCommandTree(MetadataWorkspace metadata, DataSpace dataSpace, DbExpression query, bool validate)
: this(metadata, dataSpace, query, validate, true, false)
{
}
/// <summary>When overridden in a derived class, handles any expression of an unrecognized type.</summary> /// <returns>A result value of a specific type.</returns> /// <param name="expression"> /// The <see cref="T:System.Data.Entity.Core.Common.CommandTrees.DbExpression" /> that is being visited. /// </param> public abstract TResultType Visit(DbExpression expression);
