/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual SqlExpression Translate(SqlExpression instance, MemberInfo member, Type returnType)
{
Check.NotNull(member, nameof(member));
Check.NotNull(returnType, nameof(returnType));
if (_memberToFunctionName.TryGetValue(member, out var functionName))
{
return(returnType == typeof(bool)
? _sqlExpressionFactory.Case(
new[]
{
new CaseWhenClause(
_sqlExpressionFactory.IsNotNull(instance),
_sqlExpressionFactory.Function(
functionName,
new[] { instance },
nullable: false,
argumentsPropagateNullability: new[] { false },
returnType))
},
null)
: (SqlExpression)_sqlExpressionFactory.Function(
functionName,
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
returnType));
}
if (Equals(member, _geometryType))
{
return(_sqlExpressionFactory.Case(
_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
_sqlExpressionFactory.Function(
"GeometryType",
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
returnType),
_sqlExpressionFactory.Constant(" ZM")
},
nullable: true,
argumentsPropagateNullability: new[] { true },
returnType),
new CaseWhenClause(_sqlExpressionFactory.Constant("POINT"), _sqlExpressionFactory.Constant("Point")),
new CaseWhenClause(_sqlExpressionFactory.Constant("LINESTRING"), _sqlExpressionFactory.Constant("LineString")),
new CaseWhenClause(_sqlExpressionFactory.Constant("POLYGON"), _sqlExpressionFactory.Constant("Polygon")),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTIPOINT"), _sqlExpressionFactory.Constant("MultiPoint")),
new CaseWhenClause(
_sqlExpressionFactory.Constant("MULTILINESTRING"), _sqlExpressionFactory.Constant("MultiLineString")),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTIPOLYGON"), _sqlExpressionFactory.Constant("MultiPolygon")),
new CaseWhenClause(
_sqlExpressionFactory.Constant("GEOMETRYCOLLECTION"), _sqlExpressionFactory.Constant("GeometryCollection"))));
}
if (Equals(member, _ogcGeometryType))
{
return(_sqlExpressionFactory.Case(
_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
_sqlExpressionFactory.Function(
"GeometryType",
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
typeof(string)),
_sqlExpressionFactory.Constant(" ZM")
},
nullable: true,
argumentsPropagateNullability: new[] { true },
typeof(string)),
new CaseWhenClause(_sqlExpressionFactory.Constant("POINT"), _sqlExpressionFactory.Constant(OgcGeometryType.Point)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("LINESTRING"), _sqlExpressionFactory.Constant(OgcGeometryType.LineString)),
new CaseWhenClause(_sqlExpressionFactory.Constant("POLYGON"), _sqlExpressionFactory.Constant(OgcGeometryType.Polygon)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("MULTIPOINT"), _sqlExpressionFactory.Constant(OgcGeometryType.MultiPoint)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("MULTILINESTRING"), _sqlExpressionFactory.Constant(OgcGeometryType.MultiLineString)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("MULTIPOLYGON"), _sqlExpressionFactory.Constant(OgcGeometryType.MultiPolygon)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("GEOMETRYCOLLECTION"),
_sqlExpressionFactory.Constant(OgcGeometryType.GeometryCollection))));
}
return(null);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
Check.NotNull(method, nameof(method));
Check.NotNull(arguments, nameof(arguments));
Check.NotNull(logger, nameof(logger));
if (_methodToFunctionName.TryGetValue(method, out var functionName))
{
var finalArguments = new[] { instance }.Concat(arguments);
if (method.ReturnType == typeof(bool))
{
var nullCheck = (SqlExpression)_sqlExpressionFactory.IsNotNull(instance);
foreach (var argument in arguments)
{
nullCheck = _sqlExpressionFactory.AndAlso(
nullCheck,
_sqlExpressionFactory.IsNotNull(argument));
}
return(_sqlExpressionFactory.Case(
new[]
{
new CaseWhenClause(
nullCheck,
_sqlExpressionFactory.Function(
functionName,
finalArguments,
nullable: false,
finalArguments.Select(a => false),
method.ReturnType))
},
null));
}
return(_sqlExpressionFactory.Function(
functionName,
finalArguments,
nullable: true,
finalArguments.Select(a => true),
method.ReturnType));
}
if (Equals(method, _getGeometryN))
{
return(_sqlExpressionFactory.Function(
"GeometryN",
new[]
{
instance,
_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Constant(1))
},
nullable: true,
argumentsPropagateNullability: new[] { true, true },
method.ReturnType));
}
if (Equals(method, _isWithinDistance))
{
return(_sqlExpressionFactory.LessThanOrEqual(
_sqlExpressionFactory.Function(
"Distance",
new[] { instance, arguments[0] },
nullable: true,
argumentsPropagateNullability: new[] { true, true },
typeof(double)),
arguments[1]));
}
return(null);
}
public override Expression Visit(Expression expression)
{
if (expression is InExpression inExpression)
{
var inValues = new List<object>();
var hasNullValue = false;
CoreTypeMapping typeMapping = null;
switch (inExpression.Values)
{
case SqlConstantExpression sqlConstant:
{
typeMapping = sqlConstant.TypeMapping;
var values = (IEnumerable)sqlConstant.Value;
foreach (var value in values)
{
if (value == null)
{
hasNullValue = true;
continue;
}
inValues.Add(value);
}
}
break;
case SqlParameterExpression sqlParameter:
{
typeMapping = sqlParameter.TypeMapping;
var values = (IEnumerable)_parametersValues[sqlParameter.Name];
foreach (var value in values)
{
if (value == null)
{
hasNullValue = true;
continue;
}
inValues.Add(value);
}
}
break;
}
var updatedInExpression = inValues.Count > 0
? _sqlExpressionFactory.In(
(SqlExpression)Visit(inExpression.Item),
_sqlExpressionFactory.Constant(inValues, typeMapping),
inExpression.Negated)
: null;
var nullCheckExpression = hasNullValue
? _sqlExpressionFactory.IsNull(inExpression.Item)
: null;
if (updatedInExpression != null && nullCheckExpression != null)
{
return _sqlExpressionFactory.OrElse(updatedInExpression, nullCheckExpression);
}
if (updatedInExpression == null && nullCheckExpression == null)
{
return _sqlExpressionFactory.Equal(_sqlExpressionFactory.Constant(true), _sqlExpressionFactory.Constant(false));
}
return (SqlExpression)updatedInExpression ?? nullCheckExpression;
}
return base.Visit(expression);
}
public virtual SqlExpression Translate(SqlExpression instance, MemberInfo member, Type returnType, IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
if (member.DeclaringType == typeof(DateTime))
{
var memberName = member.Name;
if (_datePartMapping.TryGetValue(memberName, out var datePart))
{
return(_sqlExpressionFactory.Convert(
TaosExpression.Strftime(
_sqlExpressionFactory,
typeof(string),
datePart,
instance),
returnType));
}
if (string.Equals(memberName, nameof(DateTime.Ticks)))
{
return(_sqlExpressionFactory.Convert(
_sqlExpressionFactory.Multiply(
_sqlExpressionFactory.Subtract(
_sqlExpressionFactory.Function(
"julianday",
new[] { instance }, true, null,
typeof(double)),
_sqlExpressionFactory.Constant(1721425.5)), // NB: Result of julianday('0001-01-01 00:00:00')
_sqlExpressionFactory.Constant(TimeSpan.TicksPerDay)),
typeof(long)));
}
if (string.Equals(memberName, nameof(DateTime.Millisecond)))
{
return(_sqlExpressionFactory.Modulo(
_sqlExpressionFactory.Multiply(
_sqlExpressionFactory.Convert(
TaosExpression.Strftime(
_sqlExpressionFactory,
typeof(string),
"%f",
instance),
typeof(double)),
_sqlExpressionFactory.Constant(1000)),
_sqlExpressionFactory.Constant(1000)));
}
var format = "%Y-%m-%d %H:%M:%f";
SqlExpression timestring;
var modifiers = new List <SqlExpression>();
switch (memberName)
{
case nameof(DateTime.Now):
timestring = _sqlExpressionFactory.Constant("now");
modifiers.Add(_sqlExpressionFactory.Constant("localtime"));
break;
case nameof(DateTime.UtcNow):
timestring = _sqlExpressionFactory.Constant("now");
break;
case nameof(DateTime.Date):
timestring = instance;
modifiers.Add(_sqlExpressionFactory.Constant("start of day"));
break;
case nameof(DateTime.Today):
timestring = _sqlExpressionFactory.Constant("now");
modifiers.Add(_sqlExpressionFactory.Constant("localtime"));
modifiers.Add(_sqlExpressionFactory.Constant("start of day"));
break;
case nameof(DateTime.TimeOfDay):
format = "%H:%M:%f";
timestring = instance;
break;
default:
return(null);
}
Debug.Assert(timestring != null);
return(_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
TaosExpression.Strftime(
_sqlExpressionFactory,
returnType,
format,
timestring,
modifiers),
_sqlExpressionFactory.Constant("0")
}, true, null,
returnType),
_sqlExpressionFactory.Constant(".")
}, true, null,
returnType));
}
return(null);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public override Expression Visit(Expression expression)
{
if (expression is FromSqlExpression fromSql)
{
if (!_visitedFromSqlExpressions.TryGetValue(fromSql, out var updatedFromSql))
{
switch (fromSql.Arguments)
{
case ParameterExpression parameterExpression:
var parameterValues = (object[])_parametersValues[parameterExpression.Name];
_canCache = false;
var subParameters = new List <IRelationalParameter>(parameterValues.Length);
// ReSharper disable once ForCanBeConvertedToForeach
for (var i = 0; i < parameterValues.Length; i++)
{
var parameterName = _parameterNameGenerator.GenerateNext();
if (parameterValues[i] is DbParameter dbParameter)
{
if (string.IsNullOrEmpty(dbParameter.ParameterName))
{
dbParameter.ParameterName = parameterName;
}
else
{
parameterName = dbParameter.ParameterName;
}
subParameters.Add(new RawRelationalParameter(parameterName, dbParameter));
}
else
{
subParameters.Add(
new TypeMappedRelationalParameter(
parameterName,
parameterName,
_typeMappingSource.GetMappingForValue(parameterValues[i]),
parameterValues[i]?.GetType().IsNullableType()));
}
}
updatedFromSql = fromSql.Update(
Expression.Constant(new CompositeRelationalParameter(parameterExpression.Name, subParameters)));
_visitedFromSqlExpressions[fromSql] = updatedFromSql;
break;
case ConstantExpression constantExpression:
var existingValues = (object[])constantExpression.Value;
var constantValues = new object[existingValues.Length];
for (var i = 0; i < existingValues.Length; i++)
{
var value = existingValues[i];
if (value is DbParameter dbParameter)
{
var parameterName = _parameterNameGenerator.GenerateNext();
if (string.IsNullOrEmpty(dbParameter.ParameterName))
{
dbParameter.ParameterName = parameterName;
}
else
{
parameterName = dbParameter.ParameterName;
}
constantValues[i] = new RawRelationalParameter(parameterName, dbParameter);
}
else
{
constantValues[i] = _sqlExpressionFactory.Constant(
value, _typeMappingSource.GetMappingForValue(value));
}
}
updatedFromSql = fromSql.Update(Expression.Constant(constantValues, typeof(object[])));
_visitedFromSqlExpressions[fromSql] = updatedFromSql;
break;
}
}
return(updatedFromSql);
}
return(base.Visit(expression));
}
public virtual SqlExpression?Translate(
SqlExpression?instance,
MethodInfo method,
IReadOnlyList <SqlExpression> arguments,
IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
Check.NotNull(method, nameof(method));
Check.NotNull(arguments, nameof(arguments));
Check.NotNull(logger, nameof(logger));
if (instance != null)
{
if (_containsMethodInfo.Equals(method))
{
return(TranslateSystemFunction("CONTAINS", instance, arguments[0], typeof(bool)));
}
if (_startsWithMethodInfo.Equals(method))
{
return(TranslateSystemFunction("STARTSWITH", instance, arguments[0], typeof(bool)));
}
if (_endsWithMethodInfo.Equals(method))
{
return(TranslateSystemFunction("ENDSWITH", instance, arguments[0], typeof(bool)));
}
}
if (_firstOrDefaultMethodInfoWithoutArgs.Equals(method))
{
return(TranslateSystemFunction("LEFT", arguments[0], _sqlExpressionFactory.Constant(1), typeof(char)));
}
if (_lastOrDefaultMethodInfoWithoutArgs.Equals(method))
{
return(TranslateSystemFunction("RIGHT", arguments[0], _sqlExpressionFactory.Constant(1), typeof(char)));
}
if (_stringConcatWithTwoArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
arguments[1]));
}
if (_stringConcatWithThreeArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Add(
arguments[1],
arguments[2])));
}
if (_stringConcatWithFourArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Add(
arguments[1],
_sqlExpressionFactory.Add(
arguments[2],
arguments[3]))));
}
return(null);
}
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments)
{
Check.NotNull(method, nameof(method));
Check.NotNull(arguments, nameof(arguments));
SqlExpression modifier = null;
if (_addMilliseconds.Equals(method))
{
modifier = _sqlExpressionFactory.Add(
_sqlExpressionFactory.Convert(
_sqlExpressionFactory.Divide(
arguments[0],
_sqlExpressionFactory.Constant(1000.0)),
typeof(string)),
_sqlExpressionFactory.Constant(" seconds"));
}
else if (_addTicks.Equals(method))
{
modifier = _sqlExpressionFactory.Add(
_sqlExpressionFactory.Convert(
_sqlExpressionFactory.Divide(
arguments[0],
_sqlExpressionFactory.Constant((double)TimeSpan.TicksPerDay)),
typeof(string)),
_sqlExpressionFactory.Constant(" seconds"));
}
else if (_methodInfoToUnitSuffix.TryGetValue(method, out var unitSuffix))
{
modifier = _sqlExpressionFactory.Add(
_sqlExpressionFactory.Convert(arguments[0], typeof(string)),
_sqlExpressionFactory.Constant(unitSuffix));
}
if (modifier != null)
{
return(_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
SqliteExpression.Strftime(
_sqlExpressionFactory,
method.ReturnType,
"%Y-%m-%d %H:%M:%f",
instance,
new[] { modifier }),
_sqlExpressionFactory.Constant("0")
},
nullResultAllowed: true,
argumentsPropagateNullability: new[] { true, false },
method.ReturnType),
_sqlExpressionFactory.Constant(".")
},
nullResultAllowed: true,
argumentsPropagateNullability: new[] { true, false },
method.ReturnType));
}
return(null);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments)
{
Check.NotNull(method, nameof(method));
Check.NotNull(arguments, nameof(arguments));
if (_indexOfMethodInfo.Equals(method))
{
var argument = arguments[0];
var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, argument);
argument = _sqlExpressionFactory.ApplyTypeMapping(argument, stringTypeMapping);
SqlExpression charIndexExpression;
var storeType = stringTypeMapping.StoreType;
if (string.Equals(storeType, "nvarchar(max)", StringComparison.OrdinalIgnoreCase) ||
string.Equals(storeType, "varchar(max)", StringComparison.OrdinalIgnoreCase))
{
charIndexExpression = _sqlExpressionFactory.Function(
"CHARINDEX",
new[] { argument, _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping) },
nullable: true,
argumentsPropagateNullability: new[] { true, true },
typeof(long));
charIndexExpression = _sqlExpressionFactory.Convert(charIndexExpression, typeof(int));
}
else
{
charIndexExpression = _sqlExpressionFactory.Function(
"CHARINDEX",
new[] { argument, _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping) },
nullable: true,
argumentsPropagateNullability: new[] { true, true },
method.ReturnType);
}
charIndexExpression = _sqlExpressionFactory.Subtract(charIndexExpression, _sqlExpressionFactory.Constant(1));
return(_sqlExpressionFactory.Case(
new[]
{
new CaseWhenClause(
_sqlExpressionFactory.Equal(
argument,
_sqlExpressionFactory.Constant(string.Empty, stringTypeMapping)),
_sqlExpressionFactory.Constant(0))
},
charIndexExpression));
}
if (_replaceMethodInfo.Equals(method))
{
var firstArgument = arguments[0];
var secondArgument = arguments[1];
var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, firstArgument, secondArgument);
instance = _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping);
firstArgument = _sqlExpressionFactory.ApplyTypeMapping(firstArgument, stringTypeMapping);
secondArgument = _sqlExpressionFactory.ApplyTypeMapping(secondArgument, stringTypeMapping);
return(_sqlExpressionFactory.Function(
"REPLACE",
new[] { instance, firstArgument, secondArgument },
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType,
stringTypeMapping));
}
if (_toLowerMethodInfo.Equals(method) ||
_toUpperMethodInfo.Equals(method))
{
return(_sqlExpressionFactory.Function(
_toLowerMethodInfo.Equals(method) ? "LOWER" : "UPPER",
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
method.ReturnType,
instance.TypeMapping));
}
if (_substringMethodInfo.Equals(method))
{
return(_sqlExpressionFactory.Function(
"SUBSTRING",
new[]
{
instance,
_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Constant(1)),
arguments[1]
},
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType,
instance.TypeMapping));
}
if (_isNullOrWhiteSpaceMethodInfo.Equals(method))
{
var argument = arguments[0];
return(_sqlExpressionFactory.OrElse(
_sqlExpressionFactory.IsNull(argument),
_sqlExpressionFactory.Equal(
_sqlExpressionFactory.Function(
"LTRIM",
new[]
{
_sqlExpressionFactory.Function(
"RTRIM",
new[] { argument },
nullable: true,
argumentsPropagateNullability: new[] { true },
argument.Type,
argument.TypeMapping)
},
nullable: true,
argumentsPropagateNullability: new[] { true },
argument.Type,
argument.TypeMapping),
_sqlExpressionFactory.Constant(string.Empty, argument.TypeMapping))));
}
if (_trimStartMethodInfoWithoutArgs?.Equals(method) == true ||
(_trimStartMethodInfoWithCharArrayArg.Equals(method)
// SqlServer LTRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(_sqlExpressionFactory.Function(
"LTRIM",
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
instance.Type,
instance.TypeMapping));
}
if (_trimEndMethodInfoWithoutArgs?.Equals(method) == true ||
(_trimEndMethodInfoWithCharArrayArg.Equals(method)
// SqlServer RTRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(_sqlExpressionFactory.Function(
"RTRIM",
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
instance.Type,
instance.TypeMapping));
}
if (_trimMethodInfoWithoutArgs?.Equals(method) == true ||
(_trimMethodInfoWithCharArrayArg.Equals(method)
// SqlServer LTRIM/RTRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(_sqlExpressionFactory.Function(
"LTRIM",
new[]
{
_sqlExpressionFactory.Function(
"RTRIM",
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
instance.Type,
instance.TypeMapping)
},
nullable: true,
argumentsPropagateNullability: new[] { true },
instance.Type,
instance.TypeMapping));
}
if (_containsMethodInfo.Equals(method))
{
var pattern = arguments[0];
var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, pattern);
instance = _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping);
pattern = _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping);
if (pattern is SqlConstantExpression constantPattern)
{
// Intentionally string.Empty since we don't want to match nulls here.
#pragma warning disable CA1820 // Test for empty strings using string length
if ((string)constantPattern.Value == string.Empty)
#pragma warning restore CA1820 // Test for empty strings using string length
{
return(_sqlExpressionFactory.Constant(true));
}
return(_sqlExpressionFactory.GreaterThan(
_sqlExpressionFactory.Function(
"CHARINDEX",
new[] { pattern, instance },
nullable: true,
argumentsPropagateNullability: new[] { true, true },
typeof(int)),
_sqlExpressionFactory.Constant(0)));
}
return(_sqlExpressionFactory.OrElse(
_sqlExpressionFactory.Equal(
pattern,
_sqlExpressionFactory.Constant(string.Empty, stringTypeMapping)),
_sqlExpressionFactory.GreaterThan(
_sqlExpressionFactory.Function(
"CHARINDEX",
new[] { pattern, instance },
nullable: true,
argumentsPropagateNullability: new[] { true, true },
typeof(int)),
_sqlExpressionFactory.Constant(0))));
}
if (_firstOrDefaultMethodInfoWithoutArgs.Equals(method))
{
var argument = arguments[0];
return(_sqlExpressionFactory.Function(
"SUBSTRING",
new[] { argument, _sqlExpressionFactory.Constant(1), _sqlExpressionFactory.Constant(1) },
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType));
}
if (_lastOrDefaultMethodInfoWithoutArgs.Equals(method))
{
var argument = arguments[0];
return(_sqlExpressionFactory.Function(
"SUBSTRING",
new[] { argument,
_sqlExpressionFactory.Function(
"LEN",
new[] { argument },
nullable: true,
argumentsPropagateNullability: new[] { true },
typeof(int)),
_sqlExpressionFactory.Constant(1) },
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType));
}
if (_startsWithMethodInfo.Equals(method))
{
return(TranslateStartsEndsWith(instance, arguments[0], true));
}
if (_endsWithMethodInfo.Equals(method))
{
return(TranslateStartsEndsWith(instance, arguments[0], false));
}
return(null);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual SqlExpression?Translate(
SqlExpression?instance,
MethodInfo method,
IReadOnlyList <SqlExpression> arguments,
IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
Check.NotNull(method, nameof(method));
Check.NotNull(arguments, nameof(arguments));
Check.NotNull(logger, nameof(logger));
if (instance != null)
{
if (_containsMethodInfo.Equals(method))
{
return(TranslateSystemFunction("CONTAINS", typeof(bool), instance, arguments[0]));
}
if (_startsWithMethodInfo.Equals(method))
{
return(TranslateSystemFunction("STARTSWITH", typeof(bool), instance, arguments[0]));
}
if (_endsWithMethodInfo.Equals(method))
{
return(TranslateSystemFunction("ENDSWITH", typeof(bool), instance, arguments[0]));
}
if (_toLowerMethodInfo.Equals(method))
{
return(TranslateSystemFunction("LOWER", method.ReturnType, instance));
}
if (_toUpperMethodInfo.Equals(method))
{
return(TranslateSystemFunction("UPPER", method.ReturnType, instance));
}
if (_trimStartMethodInfoWithoutArgs?.Equals(method) == true ||
(_trimStartMethodInfoWithCharArrayArg.Equals(method)
// Cosmos DB LTRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(TranslateSystemFunction("LTRIM", method.ReturnType, instance));
}
if (_trimEndMethodInfoWithoutArgs?.Equals(method) == true ||
(_trimEndMethodInfoWithCharArrayArg.Equals(method)
// Cosmos DB RTRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(TranslateSystemFunction("RTRIM", method.ReturnType, instance));
}
if (_trimMethodInfoWithoutArgs?.Equals(method) == true ||
(_trimMethodInfoWithCharArrayArg.Equals(method)
// Cosmos DB TRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(TranslateSystemFunction("TRIM", method.ReturnType, instance));
}
if (_substringMethodInfo.Equals(method))
{
return(TranslateSystemFunction("SUBSTRING", method.ReturnType, instance, arguments[0], arguments[1]));
}
}
if (_firstOrDefaultMethodInfoWithoutArgs.Equals(method))
{
return(TranslateSystemFunction("LEFT", typeof(char), arguments[0], _sqlExpressionFactory.Constant(1)));
}
if (_lastOrDefaultMethodInfoWithoutArgs.Equals(method))
{
return(TranslateSystemFunction("RIGHT", typeof(char), arguments[0], _sqlExpressionFactory.Constant(1)));
}
if (_stringConcatWithTwoArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
arguments[1]));
}
if (_stringConcatWithThreeArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Add(
arguments[1],
arguments[2])));
}
if (_stringConcatWithFourArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Add(
arguments[1],
_sqlExpressionFactory.Add(
arguments[2],
arguments[3]))));
}
return(null);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual SqlExpression Translate(SqlExpression instance, MemberInfo member, Type returnType)
{
Check.NotNull(member, nameof(member));
Check.NotNull(returnType, nameof(returnType));
if (typeof(Geometry).IsAssignableFrom(member.DeclaringType))
{
Check.DebugAssert(instance.TypeMapping != null, "Instance must have typeMapping assigned.");
var storeType = instance.TypeMapping.StoreType;
var isGeography = string.Equals(storeType, "geography", StringComparison.OrdinalIgnoreCase);
if (_memberToFunctionName.TryGetValue(member, out var functionName) ||
(!isGeography && _geometryMemberToFunctionName.TryGetValue(member, out functionName)))
{
var resultTypeMapping = typeof(Geometry).IsAssignableFrom(returnType)
? _typeMappingSource.FindMapping(returnType, storeType)
: _typeMappingSource.FindMapping(returnType);
return(_sqlExpressionFactory.Function(
instance,
functionName,
Array.Empty <SqlExpression>(),
nullable: true,
instancePropagatesNullability: true,
argumentsPropagateNullability: Array.Empty <bool>(),
returnType,
resultTypeMapping));
}
if (Equals(member, _ogcGeometryType))
{
var whenClauses = new List <CaseWhenClause>
{
new CaseWhenClause(
_sqlExpressionFactory.Constant("Point"), _sqlExpressionFactory.Constant(OgcGeometryType.Point)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("LineString"), _sqlExpressionFactory.Constant(OgcGeometryType.LineString)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("Polygon"), _sqlExpressionFactory.Constant(OgcGeometryType.Polygon)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("MultiPoint"), _sqlExpressionFactory.Constant(OgcGeometryType.MultiPoint)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("MultiLineString"),
_sqlExpressionFactory.Constant(OgcGeometryType.MultiLineString)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("MultiPolygon"),
_sqlExpressionFactory.Constant(OgcGeometryType.MultiPolygon)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("GeometryCollection"),
_sqlExpressionFactory.Constant(OgcGeometryType.GeometryCollection)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("CircularString"),
_sqlExpressionFactory.Constant(OgcGeometryType.CircularString)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("CompoundCurve"),
_sqlExpressionFactory.Constant(OgcGeometryType.CompoundCurve)),
new CaseWhenClause(
_sqlExpressionFactory.Constant("CurvePolygon"),
_sqlExpressionFactory.Constant(OgcGeometryType.CurvePolygon))
};
if (isGeography)
{
whenClauses.Add(
new CaseWhenClause(
_sqlExpressionFactory.Constant("FullGlobe"), _sqlExpressionFactory.Constant((OgcGeometryType)126)));
}
return(_sqlExpressionFactory.Case(
_sqlExpressionFactory.Function(
instance,
"STGeometryType",
Array.Empty <SqlExpression>(),
nullable: true,
instancePropagatesNullability: true,
argumentsPropagateNullability: Array.Empty <bool>(),
typeof(string)),
whenClauses.ToArray()));
}
if (Equals(member, _srid))
{
return(_sqlExpressionFactory.Function(
instance,
"STSrid",
nullable: true,
instancePropagatesNullability: true,
returnType));
}
}
return(null);
}
internal static SqlExpression Strftime(this ISqlExpressionFactory factory, Type returnType, string format, SqlExpression timestring, IEnumerable <SqlExpression>?modifiers = null)
{
var result = factory.DateFunction("strftime", GetArguments(timestring, modifiers).Insert(0, factory.Constant(format)), timestring.Type);
if (timestring.Type != returnType)
{
result = factory.Convert(result, returnType);
}
return(result);
}
private static SqlExpression GetAndoyerDistance(
SqlExpression left,
SqlExpression right,
Type resultType,
ISqlExpressionFactory sqlExpressionFactory)
{
SqlExpression toDegrees(SqlExpression coord)
=> sqlExpressionFactory.Divide(
sqlExpressionFactory.Multiply(
coord,
sqlExpressionFactory.Function(
"PI",
Array.Empty <SqlExpression>(),
resultType)),
sqlExpressionFactory.Constant(180.0));
SqlExpression xCoord(SqlExpression point)
=> sqlExpressionFactory.Function(
"ST_X",
new[] { point },
resultType);
SqlExpression yCoord(SqlExpression point)
=> sqlExpressionFactory.Function(
"ST_Y",
new[] { point },
resultType);
var c0 = sqlExpressionFactory.Constant(0.0);
var c1 = sqlExpressionFactory.Constant(1.0);
var c2 = sqlExpressionFactory.Constant(2.0);
var c3 = sqlExpressionFactory.Constant(3.0);
var c2Int = sqlExpressionFactory.Constant(2);
var lon1 = toDegrees(xCoord(left));
var lat1 = toDegrees(yCoord(left));
var lon2 = toDegrees(xCoord(right));
var lat2 = toDegrees(yCoord(right));
var g = sqlExpressionFactory.Divide(
sqlExpressionFactory.Subtract(
lat1,
lat2),
c2);
var lambda = sqlExpressionFactory.Divide(
sqlExpressionFactory.Subtract(
lon1,
lon2),
c2);
var f = sqlExpressionFactory.Divide(
sqlExpressionFactory.Add(
lat1,
lat2),
c2);
var sinG2 = sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"SIN",
new[] { g },
resultType),
c2Int
},
resultType);
var cosG2 = sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"COS",
new[] { g },
resultType),
c2Int
},
resultType);
var sinF2 = sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"SIN",
new[] { f },
resultType),
c2Int
},
resultType);
var cosF2 = sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"COS",
new[] { f },
resultType),
c2Int
},
resultType);
var sinL2 = sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"SIN",
new[] { lambda },
resultType),
c2Int
},
resultType);
var cosL2 = sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"COS",
new[] { lambda },
resultType),
c2Int
},
resultType);
var s = sqlExpressionFactory.Add(
sqlExpressionFactory.Multiply(sinG2, cosL2),
sqlExpressionFactory.Multiply(cosF2, sinL2));
var c = sqlExpressionFactory.Add(
sqlExpressionFactory.Multiply(cosG2, cosL2),
sqlExpressionFactory.Multiply(sinF2, sinL2));
var radiusA = sqlExpressionFactory.Constant(6378137.0);
var radiusB = sqlExpressionFactory.Constant(6356752.3142451793);
var flattening = sqlExpressionFactory.Divide(
sqlExpressionFactory.Subtract(radiusA, radiusB),
radiusA);
var omega = sqlExpressionFactory.Function(
"ATAN",
new[]
{
sqlExpressionFactory.Function(
"SQRT",
new[] { sqlExpressionFactory.Divide(s, c) },
resultType)
},
resultType);
var r3 = sqlExpressionFactory.Divide(
sqlExpressionFactory.Multiply(
c3,
sqlExpressionFactory.Function(
"SQRT",
new[] { sqlExpressionFactory.Multiply(s, c) },
resultType)),
omega);
var d = sqlExpressionFactory.Multiply(
sqlExpressionFactory.Multiply(c2, omega),
radiusA);
var h1 = sqlExpressionFactory.Divide(
sqlExpressionFactory.Subtract(r3, c1),
sqlExpressionFactory.Multiply(c2, c));
var h2 = sqlExpressionFactory.Divide(
sqlExpressionFactory.Add(r3, c1),
sqlExpressionFactory.Multiply(c2, s));
var andoyer = sqlExpressionFactory.Multiply(
d,
sqlExpressionFactory.Add(
c1,
sqlExpressionFactory.Multiply(
flattening,
sqlExpressionFactory.Subtract(
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Multiply(
h1,
sinF2),
cosG2),
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Multiply(
h2,
cosF2),
sinG2)))));
return(sqlExpressionFactory.Case(
new[]
{
new CaseWhenClause(
sqlExpressionFactory.OrElse(
sqlExpressionFactory.OrElse(
sqlExpressionFactory.AndAlso(
sqlExpressionFactory.Equal(lambda, c0),
sqlExpressionFactory.Equal(g, c0)),
sqlExpressionFactory.Equal(s, c0)),
sqlExpressionFactory.Equal(c, c0)),
c0),
},
andoyer));
}
private static SqlExpression GetHaversineDistance(
SqlExpression left,
SqlExpression right,
Type resultType,
ISqlExpressionFactory sqlExpressionFactory)
{
// HAVERSINE = 6371000 * 2 * ASIN(
// SQRT(
// POWER(SIN((ST_Y(pt2) - ST_Y(pt1)) * pi()/180 / 2), 2) +
// COS(ST_Y(pt1) * pi()/180) *
// COS(ST_Y(pt2) * pi()/180) *
// POWER(SIN((ST_X(pt2) - ST_X(pt1)) * pi()/180 / 2), 2)
// )
// )
return(sqlExpressionFactory.Multiply(
sqlExpressionFactory.Constant(6370986.0), // see https://postgis.net/docs/manual-1.4/ST_Distance_Sphere.html
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Constant(2.0),
sqlExpressionFactory.Function(
"ASIN",
new[]
{
sqlExpressionFactory.Function(
"SQRT",
new[]
{
sqlExpressionFactory.Add(
sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"SIN",
new[]
{
sqlExpressionFactory.Divide(
sqlExpressionFactory.Divide(
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Subtract(
sqlExpressionFactory.Function(
"ST_Y",
new[] { right },
resultType),
sqlExpressionFactory.Function(
"ST_Y",
new[] { left },
resultType)),
sqlExpressionFactory.Function(
"PI",
Array.Empty <SqlExpression>(),
resultType)),
sqlExpressionFactory.Constant(180.0)),
sqlExpressionFactory.Constant(2.0))
},
resultType),
sqlExpressionFactory.Constant(2),
},
resultType),
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Function(
"COS",
new[]
{
sqlExpressionFactory.Divide(
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Function(
"ST_Y",
new[] { left },
resultType),
sqlExpressionFactory.Function(
"PI",
Array.Empty <SqlExpression>(),
resultType)),
sqlExpressionFactory.Constant(180.0)),
},
resultType),
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Function(
"COS",
new[]
{
sqlExpressionFactory.Divide(
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Function(
"ST_Y",
new[] { right },
resultType),
sqlExpressionFactory.Function(
"PI",
Array.Empty <SqlExpression>(),
resultType)),
sqlExpressionFactory.Constant(180.0)),
},
resultType),
sqlExpressionFactory.Function(
"POWER",
new SqlExpression[]
{
sqlExpressionFactory.Function(
"SIN",
new[]
{
sqlExpressionFactory.Divide(
sqlExpressionFactory.Divide(
sqlExpressionFactory.Multiply(
sqlExpressionFactory.Subtract(
sqlExpressionFactory.Function(
"ST_X",
new[] { right },
resultType),
sqlExpressionFactory.Function(
"ST_X",
new[] { left },
resultType)),
sqlExpressionFactory.Function(
"PI",
Array.Empty <SqlExpression>(),
resultType)),
sqlExpressionFactory.Constant(180.0)),
sqlExpressionFactory.Constant(2.0))
},
resultType),
sqlExpressionFactory.Constant(2),
},
resultType))))
},
resultType)
},
resultType))));
}
public static SqlExpression GetStDistanceSphereFunctionCall(
SqlExpression left,
SqlExpression right,
SpatialDistanceAlgorithm algorithm,
Type resultType,
RelationalTypeMapping resultTypeMapping,
ISqlExpressionFactory sqlExpressionFactory,
IMySqlOptions options)
{
if (options.ServerVersion.SupportsSpatialDistanceSphereFunction)
{
if (algorithm == SpatialDistanceAlgorithm.Native)
{
return(sqlExpressionFactory.Function(
"ST_Distance_Sphere",
new[] { left, right },
resultType,
resultTypeMapping));
}
if (algorithm == SpatialDistanceAlgorithm.Andoyer &&
options.ServerVersion.SupportsSpatialDistanceFunctionImplementsAndoyer)
{
// The `ST_Distance()` in MySQL already uses the Andoyer algorithm, when SRID 4326 is associated
// with the geometry.
// CHECK: It might be faster to just run the custom implementation, if `ST_SRID()` does not support
// a second parameter yet (see SetSrid()).
return(sqlExpressionFactory.Case(
new[]
{
new CaseWhenClause(
sqlExpressionFactory.Equal(
sqlExpressionFactory.Function(
"ST_SRID",
new[] { left },
typeof(int)),
sqlExpressionFactory.Constant(4326)),
GetStDistanceFunctionCall(
left,
right,
resultType,
resultTypeMapping,
sqlExpressionFactory))
},
GetStDistanceFunctionCall(
SetSrid(left, 4326, sqlExpressionFactory, options),
SetSrid(right, 4326, sqlExpressionFactory, options),
resultType,
resultTypeMapping,
sqlExpressionFactory)));
}
if (algorithm == SpatialDistanceAlgorithm.Haversine)
{
// The Haversine algorithm assumes planar coordinates.
return(sqlExpressionFactory.Case(
new[]
{
new CaseWhenClause(
sqlExpressionFactory.Equal(
sqlExpressionFactory.Function(
"ST_SRID",
new[] { left },
typeof(int)),
sqlExpressionFactory.Constant(0)),
GetHaversineDistance(
left,
right,
resultType,
sqlExpressionFactory))
},
GetHaversineDistance(
SetSrid(left, 0, sqlExpressionFactory, options),
SetSrid(right, 0, sqlExpressionFactory, options),
resultType,
sqlExpressionFactory)));
}
}
if (algorithm == SpatialDistanceAlgorithm.Haversine)
{
return(GetHaversineDistance(left, right, resultType, sqlExpressionFactory));
}
return(GetAndoyerDistance(left, right, resultType, sqlExpressionFactory));
}
private SqlExpression SimplifyUnaryExpression(
ExpressionType operatorType,
SqlExpression operand,
Type type,
RelationalTypeMapping typeMapping)
{
switch (operatorType)
{
case ExpressionType.Not
when type == typeof(bool):
{
switch (operand)
{
// !(true) -> false
// !(false) -> true
case SqlConstantExpression constantOperand
when constantOperand.Value is bool value:
{
return(_sqlExpressionFactory.Constant(!value, typeMapping));
}
case InExpression inOperand:
return(inOperand.Negate());
case SqlUnaryExpression unaryOperand:
switch (unaryOperand.OperatorType)
{
// !(!a) -> a
case ExpressionType.Not:
return(unaryOperand.Operand);
//!(a IS NULL) -> a IS NOT NULL
case ExpressionType.Equal:
return(_sqlExpressionFactory.IsNotNull(unaryOperand.Operand));
//!(a IS NOT NULL) -> a IS NULL
case ExpressionType.NotEqual:
return(_sqlExpressionFactory.IsNull(unaryOperand.Operand));
}
break;
case SqlBinaryExpression binaryOperand:
{
// De Morgan's
if (binaryOperand.OperatorType == ExpressionType.AndAlso ||
binaryOperand.OperatorType == ExpressionType.OrElse)
{
var newLeft = SimplifyUnaryExpression(ExpressionType.Not, binaryOperand.Left, type, typeMapping);
var newRight = SimplifyUnaryExpression(ExpressionType.Not, binaryOperand.Right, type, typeMapping);
return(SimplifyLogicalSqlBinaryExpression(
binaryOperand.OperatorType == ExpressionType.AndAlso
? ExpressionType.OrElse
: ExpressionType.AndAlso,
newLeft,
newRight,
binaryOperand.TypeMapping !));
}
// those optimizations are only valid in 2-value logic
// they are safe to do here because if we apply null semantics
// because null semantics removes possibility of nulls in the tree when the comparison is wrapped around NOT
if (!_useRelationalNulls &&
TryNegate(binaryOperand.OperatorType, out var negated))
{
return(SimplifyBinaryExpression(
negated,
binaryOperand.Left,
binaryOperand.Right,
binaryOperand.TypeMapping !));
}
}
break;
}
break;
}
case ExpressionType.Equal:
case ExpressionType.NotEqual:
return(SimplifyNullNotNullExpression(
operatorType,
operand,
type,
typeMapping));
}
return(_sqlExpressionFactory.MakeUnary(operatorType, operand, type, typeMapping) !);
}
public virtual SqlExpression Translate(SqlExpression instance, MemberInfo member, Type returnType)
{
if (_memberToFunctionName.TryGetValue(member, out var functionName))
{
SqlExpression translation = _sqlExpressionFactory.Function(functionName, new[] { instance }, returnType);
if (returnType == typeof(bool))
{
translation = _sqlExpressionFactory.Case(
new[]
{
new CaseWhenClause(
_sqlExpressionFactory.IsNotNull(instance),
translation)
},
null);
}
return(translation);
}
if (Equals(member, _geometryType))
{
return(_sqlExpressionFactory.Case(
_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
_sqlExpressionFactory.Function(
"GeometryType",
new []
{
instance,
},
returnType),
_sqlExpressionFactory.Constant(" ZM")
},
returnType),
new CaseWhenClause(_sqlExpressionFactory.Constant("POINT"), _sqlExpressionFactory.Constant("Point")),
new CaseWhenClause(_sqlExpressionFactory.Constant("LINESTRING"), _sqlExpressionFactory.Constant("LineString")),
new CaseWhenClause(_sqlExpressionFactory.Constant("POLYGON"), _sqlExpressionFactory.Constant("Polygon")),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTIPOINT"), _sqlExpressionFactory.Constant("MultiPoint")),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTILINESTRING"), _sqlExpressionFactory.Constant("MultiLineString")),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTIPOLYGON"), _sqlExpressionFactory.Constant("MultiPolygon")),
new CaseWhenClause(_sqlExpressionFactory.Constant("GEOMETRYCOLLECTION"), _sqlExpressionFactory.Constant("GeometryCollection"))));
}
if (Equals(member, _ogcGeometryType))
{
return(_sqlExpressionFactory.Case(
_sqlExpressionFactory.Function(
"rtrim",
new SqlExpression[]
{
_sqlExpressionFactory.Function(
"GeometryType",
new []
{
instance,
},
typeof(string)),
_sqlExpressionFactory.Constant(" ZM")
},
typeof(string)),
new CaseWhenClause(_sqlExpressionFactory.Constant("POINT"), _sqlExpressionFactory.Constant(OgcGeometryType.Point)),
new CaseWhenClause(_sqlExpressionFactory.Constant("LINESTRING"), _sqlExpressionFactory.Constant(OgcGeometryType.LineString)),
new CaseWhenClause(_sqlExpressionFactory.Constant("POLYGON"), _sqlExpressionFactory.Constant(OgcGeometryType.Polygon)),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTIPOINT"), _sqlExpressionFactory.Constant(OgcGeometryType.MultiPoint)),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTILINESTRING"), _sqlExpressionFactory.Constant(OgcGeometryType.MultiLineString)),
new CaseWhenClause(_sqlExpressionFactory.Constant("MULTIPOLYGON"), _sqlExpressionFactory.Constant(OgcGeometryType.MultiPolygon)),
new CaseWhenClause(_sqlExpressionFactory.Constant("GEOMETRYCOLLECTION"), _sqlExpressionFactory.Constant(OgcGeometryType.GeometryCollection))));
}
return(null);
}
public virtual SqlExpression Translate(SqlExpression instance, MemberInfo member, Type returnType)
{
Check.NotNull(member, nameof(member));
Check.NotNull(returnType, nameof(returnType));
if (typeof(Polygon).IsAssignableFrom(member.DeclaringType))
{
Check.DebugAssert(instance.TypeMapping != null, "Instance must have typeMapping assigned.");
var storeType = instance.TypeMapping.StoreType;
var isGeography = string.Equals(storeType, "geography", StringComparison.OrdinalIgnoreCase);
if (isGeography)
{
if (Equals(_exteriorRing, member))
{
return(_sqlExpressionFactory.Function(
instance,
"RingN",
new[] { _sqlExpressionFactory.Constant(1) },
nullable: true,
instancePropagatesNullability: true,
argumentsPropagateNullability: new[] { false },
returnType,
_typeMappingSource.FindMapping(returnType, storeType)));
}
if (Equals(_numInteriorRings, member))
{
return(_sqlExpressionFactory.Subtract(
_sqlExpressionFactory.Function(
instance,
"NumRings",
Array.Empty <SqlExpression>(),
nullable: true,
instancePropagatesNullability: true,
argumentsPropagateNullability: Array.Empty <bool>(),
returnType),
_sqlExpressionFactory.Constant(1)));
}
}
if (_geometryMemberToFunctionName.TryGetValue(member, out var functionName))
{
var resultTypeMapping = typeof(Geometry).IsAssignableFrom(returnType)
? _typeMappingSource.FindMapping(returnType, storeType)
: _typeMappingSource.FindMapping(returnType);
return(_sqlExpressionFactory.Function(
instance,
functionName,
Array.Empty <SqlExpression>(),
nullable: true,
instancePropagatesNullability: true,
argumentsPropagateNullability: Array.Empty <bool>(),
returnType,
resultTypeMapping));
}
}
return(null);
}
protected override Expression VisitSqlBinary(SqlBinaryExpression sqlBinaryExpression)
{
Check.NotNull(sqlBinaryExpression, nameof(sqlBinaryExpression));
_isNullable = false;
var canOptimize = _canOptimize;
// for SqlServer we could also allow optimize on children of ExpressionType.Equal
// because they get converted to CASE blocks anyway, but for other providers it's incorrect
// once/if null semantics optimizations are provider-specific we can enable it
_canOptimize = _canOptimize && (sqlBinaryExpression.OperatorType == ExpressionType.AndAlso ||
sqlBinaryExpression.OperatorType == ExpressionType.OrElse);
var nonNullableColumns = new List <ColumnExpression>();
if (sqlBinaryExpression.OperatorType == ExpressionType.AndAlso)
{
nonNullableColumns = FindNonNullableColumns(sqlBinaryExpression.Left);
}
var newLeft = (SqlExpression)Visit(sqlBinaryExpression.Left);
var leftNullable = _isNullable;
_isNullable = false;
if (nonNullableColumns.Count > 0)
{
_nonNullableColumns.AddRange(nonNullableColumns);
}
var newRight = (SqlExpression)Visit(sqlBinaryExpression.Right);
var rightNullable = _isNullable;
foreach (var nonNullableColumn in nonNullableColumns)
{
_nonNullableColumns.Remove(nonNullableColumn);
}
if (sqlBinaryExpression.OperatorType == ExpressionType.Coalesce)
{
_isNullable = leftNullable && rightNullable;
_canOptimize = canOptimize;
return(sqlBinaryExpression.Update(newLeft, newRight));
}
if (sqlBinaryExpression.OperatorType == ExpressionType.Add &&
sqlBinaryExpression.Type == typeof(string))
{
if (leftNullable)
{
newLeft = newLeft is SqlConstantExpression
? _sqlExpressionFactory.Constant(string.Empty)
: newLeft is ColumnExpression || newLeft is SqlParameterExpression
? _sqlExpressionFactory.Coalesce(newLeft, _sqlExpressionFactory.Constant(string.Empty))
: newLeft;
}
if (rightNullable)
{
newRight = newRight is SqlConstantExpression
? _sqlExpressionFactory.Constant(string.Empty)
: newRight is ColumnExpression || newRight is SqlParameterExpression
? _sqlExpressionFactory.Coalesce(newRight, _sqlExpressionFactory.Constant(string.Empty))
: newRight;
}
return(sqlBinaryExpression.Update(newLeft, newRight));
}
if (sqlBinaryExpression.OperatorType == ExpressionType.Equal ||
sqlBinaryExpression.OperatorType == ExpressionType.NotEqual)
{
var leftConstantNull = newLeft is SqlConstantExpression leftConstant && leftConstant.Value == null;
var rightConstantNull = newRight is SqlConstantExpression rightConstant && rightConstant.Value == null;
// a == null -> a IS NULL
// a != null -> a IS NOT NULL
if (rightConstantNull)
{
_isNullable = false;
_canOptimize = canOptimize;
return(sqlBinaryExpression.OperatorType == ExpressionType.Equal
? _sqlExpressionFactory.IsNull(newLeft)
: _sqlExpressionFactory.IsNotNull(newLeft));
}
// null == a -> a IS NULL
// null != a -> a IS NOT NULL
if (leftConstantNull)
{
_isNullable = false;
_canOptimize = canOptimize;
return(sqlBinaryExpression.OperatorType == ExpressionType.Equal
? _sqlExpressionFactory.IsNull(newRight)
: _sqlExpressionFactory.IsNotNull(newRight));
}
var leftUnary = newLeft as SqlUnaryExpression;
var rightUnary = newRight as SqlUnaryExpression;
var leftNegated = leftUnary?.IsLogicalNot() == true;
var rightNegated = rightUnary?.IsLogicalNot() == true;
if (leftNegated)
{
newLeft = leftUnary.Operand;
}
if (rightNegated)
{
newRight = rightUnary.Operand;
}
var leftIsNull = _sqlExpressionFactory.IsNull(newLeft);
var rightIsNull = _sqlExpressionFactory.IsNull(newRight);
// optimized expansion which doesn't distinguish between null and false
if (canOptimize &&
sqlBinaryExpression.OperatorType == ExpressionType.Equal &&
!leftNegated &&
!rightNegated)
{
// when we use optimized form, the result can still be nullable
if (leftNullable && rightNullable)
{
_isNullable = true;
_canOptimize = canOptimize;
return(_sqlExpressionFactory.OrElse(
_sqlExpressionFactory.Equal(newLeft, newRight),
_sqlExpressionFactory.AndAlso(leftIsNull, rightIsNull)));
}
if ((leftNullable && !rightNullable) ||
(!leftNullable && rightNullable))
{
_isNullable = true;
_canOptimize = canOptimize;
return(_sqlExpressionFactory.Equal(newLeft, newRight));
}
}
// doing a full null semantics rewrite - removing all nulls from truth table
// this will NOT be correct once we introduce simplified null semantics
_isNullable = false;
_canOptimize = canOptimize;
if (sqlBinaryExpression.OperatorType == ExpressionType.Equal)
{
if (!leftNullable &&
!rightNullable)
{
// a == b <=> !a == !b -> a == b
// !a == b <=> a == !b -> a != b
return(leftNegated == rightNegated
? _sqlExpressionFactory.Equal(newLeft, newRight)
: _sqlExpressionFactory.NotEqual(newLeft, newRight));
}
if (leftNullable && rightNullable)
{
// ?a == ?b <=> !(?a) == !(?b) -> [(a == b) && (a != null && b != null)] || (a == null && b == null))
// !(?a) == ?b <=> ?a == !(?b) -> [(a != b) && (a != null && b != null)] || (a == null && b == null)
return(leftNegated == rightNegated
? ExpandNullableEqualNullable(newLeft, newRight, leftIsNull, rightIsNull)
: ExpandNegatedNullableEqualNullable(newLeft, newRight, leftIsNull, rightIsNull));
}
if (leftNullable && !rightNullable)
{
// ?a == b <=> !(?a) == !b -> (a == b) && (a != null)
// !(?a) == b <=> ?a == !b -> (a != b) && (a != null)
return(leftNegated == rightNegated
? ExpandNullableEqualNonNullable(newLeft, newRight, leftIsNull)
: ExpandNegatedNullableEqualNonNullable(newLeft, newRight, leftIsNull));
}
if (rightNullable && !leftNullable)
{
// a == ?b <=> !a == !(?b) -> (a == b) && (b != null)
// !a == ?b <=> a == !(?b) -> (a != b) && (b != null)
return(leftNegated == rightNegated
? ExpandNullableEqualNonNullable(newLeft, newRight, rightIsNull)
: ExpandNegatedNullableEqualNonNullable(newLeft, newRight, rightIsNull));
}
}
if (sqlBinaryExpression.OperatorType == ExpressionType.NotEqual)
{
if (!leftNullable &&
!rightNullable)
{
// a != b <=> !a != !b -> a != b
// !a != b <=> a != !b -> a == b
return(leftNegated == rightNegated
? _sqlExpressionFactory.NotEqual(newLeft, newRight)
: _sqlExpressionFactory.Equal(newLeft, newRight));
}
if (leftNullable && rightNullable)
{
// ?a != ?b <=> !(?a) != !(?b) -> [(a != b) || (a == null || b == null)] && (a != null || b != null)
// !(?a) != ?b <=> ?a != !(?b) -> [(a == b) || (a == null || b == null)] && (a != null || b != null)
return(leftNegated == rightNegated
? ExpandNullableNotEqualNullable(newLeft, newRight, leftIsNull, rightIsNull)
: ExpandNegatedNullableNotEqualNullable(newLeft, newRight, leftIsNull, rightIsNull));
}
if (leftNullable)
{
// ?a != b <=> !(?a) != !b -> (a != b) || (a == null)
// !(?a) != b <=> ?a != !b -> (a == b) || (a == null)
return(leftNegated == rightNegated
? ExpandNullableNotEqualNonNullable(newLeft, newRight, leftIsNull)
: ExpandNegatedNullableNotEqualNonNullable(newLeft, newRight, leftIsNull));
}
if (rightNullable)
{
// a != ?b <=> !a != !(?b) -> (a != b) || (b == null)
// !a != ?b <=> a != !(?b) -> (a == b) || (b == null)
return(leftNegated == rightNegated
? ExpandNullableNotEqualNonNullable(newLeft, newRight, rightIsNull)
: ExpandNegatedNullableNotEqualNonNullable(newLeft, newRight, rightIsNull));
}
}
}
_isNullable = leftNullable || rightNullable;
_canOptimize = canOptimize;
return(sqlBinaryExpression.Update(newLeft, newRight));
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual SqlExpression Translate(
SqlExpression instance,
MethodInfo method,
IReadOnlyList <SqlExpression> arguments,
IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
Check.NotNull(method, nameof(method));
Check.NotNull(arguments, nameof(arguments));
Check.NotNull(logger, nameof(logger));
if (_indexOfMethodInfo.Equals(method))
{
var argument = arguments[0];
var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, argument);
return(_sqlExpressionFactory.Subtract(
_sqlExpressionFactory.Function(
"instr",
new[]
{
_sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping),
_sqlExpressionFactory.ApplyTypeMapping(argument, stringTypeMapping)
},
nullable: true,
argumentsPropagateNullability: new[] { true, true },
method.ReturnType),
_sqlExpressionFactory.Constant(1)));
}
if (_replaceMethodInfo.Equals(method))
{
var firstArgument = arguments[0];
var secondArgument = arguments[1];
var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, firstArgument, secondArgument);
return(_sqlExpressionFactory.Function(
"replace",
new[]
{
_sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping),
_sqlExpressionFactory.ApplyTypeMapping(firstArgument, stringTypeMapping),
_sqlExpressionFactory.ApplyTypeMapping(secondArgument, stringTypeMapping)
},
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType,
stringTypeMapping));
}
if (_toLowerMethodInfo.Equals(method) ||
_toUpperMethodInfo.Equals(method))
{
return(_sqlExpressionFactory.Function(
_toLowerMethodInfo.Equals(method) ? "lower" : "upper",
new[] { instance },
nullable: true,
argumentsPropagateNullability: new[] { true },
method.ReturnType,
instance.TypeMapping));
}
if (_substringMethodInfo.Equals(method))
{
return(_sqlExpressionFactory.Function(
"substr",
new[] { instance, _sqlExpressionFactory.Add(arguments[0], _sqlExpressionFactory.Constant(1)), arguments[1] },
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType,
instance.TypeMapping));
}
if (_isNullOrWhiteSpaceMethodInfo.Equals(method))
{
var argument = arguments[0];
return(_sqlExpressionFactory.OrElse(
_sqlExpressionFactory.IsNull(argument),
_sqlExpressionFactory.Equal(
_sqlExpressionFactory.Function(
"trim",
new[] { argument },
nullable: true,
argumentsPropagateNullability: new[] { true },
argument.Type,
argument.TypeMapping),
_sqlExpressionFactory.Constant(string.Empty))));
}
if (_trimStartMethodInfoWithoutArgs?.Equals(method) == true ||
_trimStartMethodInfoWithCharArg?.Equals(method) == true ||
_trimStartMethodInfoWithCharArrayArg.Equals(method))
{
return(ProcessTrimMethod(instance, arguments, "ltrim"));
}
if (_trimEndMethodInfoWithoutArgs?.Equals(method) == true ||
_trimEndMethodInfoWithCharArg?.Equals(method) == true ||
_trimEndMethodInfoWithCharArrayArg.Equals(method))
{
return(ProcessTrimMethod(instance, arguments, "rtrim"));
}
if (_trimMethodInfoWithoutArgs?.Equals(method) == true ||
_trimMethodInfoWithCharArg?.Equals(method) == true ||
_trimMethodInfoWithCharArrayArg.Equals(method))
{
return(ProcessTrimMethod(instance, arguments, "trim"));
}
if (_containsMethodInfo.Equals(method))
{
var pattern = arguments[0];
var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, pattern);
instance = _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping);
pattern = _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping);
return(_sqlExpressionFactory.OrElse(
_sqlExpressionFactory.Equal(
pattern,
_sqlExpressionFactory.Constant(string.Empty, stringTypeMapping)),
_sqlExpressionFactory.GreaterThan(
_sqlExpressionFactory.Function(
"instr",
new[] { instance, pattern },
nullable: true,
argumentsPropagateNullability: new[] { true, true },
typeof(int)),
_sqlExpressionFactory.Constant(0))));
}
if (_firstOrDefaultMethodInfoWithoutArgs.Equals(method))
{
var argument = arguments[0];
return(_sqlExpressionFactory.Function(
"substr",
new[] { argument, _sqlExpressionFactory.Constant(1), _sqlExpressionFactory.Constant(1) },
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType));
}
if (_lastOrDefaultMethodInfoWithoutArgs.Equals(method))
{
var argument = arguments[0];
return(_sqlExpressionFactory.Function(
"substr",
new[]
{
argument,
_sqlExpressionFactory.Function(
"length",
new[] { argument },
nullable: true,
argumentsPropagateNullability: new[] { true },
typeof(int)),
_sqlExpressionFactory.Constant(1)
},
nullable: true,
argumentsPropagateNullability: new[] { true, true, true },
method.ReturnType));
}
if (_startsWithMethodInfo.Equals(method))
{
return(TranslateStartsEndsWith(instance, arguments[0], true));
}
if (_endsWithMethodInfo.Equals(method))
{
return(TranslateStartsEndsWith(instance, arguments[0], false));
}
return(null);
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual SqlExpression?Translate(
SqlExpression?instance,
MethodInfo method,
IReadOnlyList <SqlExpression> arguments,
IDiagnosticsLogger <DbLoggerCategory.Query> logger)
{
if (instance != null)
{
if (IndexOfMethodInfo.Equals(method))
{
return(TranslateSystemFunction("INDEX_OF", typeof(int), instance, arguments[0]));
}
if (IndexOfMethodInfoWithStartingPosition.Equals(method))
{
return(TranslateSystemFunction("INDEX_OF", typeof(int), instance, arguments[0], arguments[1]));
}
if (ReplaceMethodInfo.Equals(method))
{
return(TranslateSystemFunction("REPLACE", method.ReturnType, instance, arguments[0], arguments[1]));
}
if (ContainsMethodInfo.Equals(method))
{
return(TranslateSystemFunction("CONTAINS", typeof(bool), instance, arguments[0]));
}
if (StartsWithMethodInfo.Equals(method))
{
return(TranslateSystemFunction("STARTSWITH", typeof(bool), instance, arguments[0]));
}
if (EndsWithMethodInfo.Equals(method))
{
return(TranslateSystemFunction("ENDSWITH", typeof(bool), instance, arguments[0]));
}
if (ToLowerMethodInfo.Equals(method))
{
return(TranslateSystemFunction("LOWER", method.ReturnType, instance));
}
if (ToUpperMethodInfo.Equals(method))
{
return(TranslateSystemFunction("UPPER", method.ReturnType, instance));
}
if (TrimStartMethodInfoWithoutArgs?.Equals(method) == true ||
(TrimStartMethodInfoWithCharArrayArg.Equals(method)
// Cosmos DB LTRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(TranslateSystemFunction("LTRIM", method.ReturnType, instance));
}
if (TrimEndMethodInfoWithoutArgs?.Equals(method) == true ||
(TrimEndMethodInfoWithCharArrayArg.Equals(method)
// Cosmos DB RTRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(TranslateSystemFunction("RTRIM", method.ReturnType, instance));
}
if (TrimMethodInfoWithoutArgs?.Equals(method) == true ||
(TrimMethodInfoWithCharArrayArg.Equals(method)
// Cosmos DB TRIM does not take arguments
&& ((arguments[0] as SqlConstantExpression)?.Value as Array)?.Length == 0))
{
return(TranslateSystemFunction("TRIM", method.ReturnType, instance));
}
if (SubstringMethodInfoWithOneArg.Equals(method))
{
return(TranslateSystemFunction(
"SUBSTRING",
method.ReturnType,
instance,
arguments[0],
TranslateSystemFunction("LENGTH", typeof(int), instance)));
}
if (SubstringMethodInfoWithTwoArgs.Equals(method))
{
return(arguments[0] is SqlConstantExpression constant &&
constant.Value is int intValue &&
intValue == 0
? TranslateSystemFunction("LEFT", method.ReturnType, instance, arguments[1])
: TranslateSystemFunction("SUBSTRING", method.ReturnType, instance, arguments[0], arguments[1]));
}
}
if (FirstOrDefaultMethodInfoWithoutArgs.Equals(method))
{
return(TranslateSystemFunction("LEFT", typeof(char), arguments[0], _sqlExpressionFactory.Constant(1)));
}
if (LastOrDefaultMethodInfoWithoutArgs.Equals(method))
{
return(TranslateSystemFunction("RIGHT", typeof(char), arguments[0], _sqlExpressionFactory.Constant(1)));
}
if (StringConcatWithTwoArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
arguments[1]));
}
if (StringConcatWithThreeArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Add(
arguments[1],
arguments[2])));
}
if (StringConcatWithFourArguments.Equals(method))
{
return(_sqlExpressionFactory.Add(
arguments[0],
_sqlExpressionFactory.Add(
arguments[1],
_sqlExpressionFactory.Add(
arguments[2],
arguments[3]))));
}
if (StringComparisonWithComparisonTypeArgumentInstance.Equals(method) ||
StringComparisonWithComparisonTypeArgumentStatic.Equals(method))
{
var comparisonTypeArgument = arguments[^ 1];