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 (method.Equals(_regexIsMatchMethodInfo)) { var input = arguments[0]; var pattern = arguments[1]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(input, pattern); return(_sqlExpressionFactory.Function( "regexp", new[] { _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(input, stringTypeMapping) }, nullable: true, argumentsPropagateNullability: new[] { true, true }, typeof(bool))); } 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 (method.Equals(MethodInfo)) { var matchExpression = arguments[1]; var pattern = arguments[2]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(matchExpression, pattern); return(_sqlExpressionFactory.Function( "glob", new[] { _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(matchExpression, stringTypeMapping) }, nullable: true, argumentsPropagateNullability: new[] { true, true }, typeof(bool))); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (_supportedMethods.TryGetValue(method, out var sqlFunctionName)) { RelationalTypeMapping typeMapping; List <SqlExpression> newArguments = null; if (string.Equals(sqlFunctionName, "max") || string.Equals(sqlFunctionName, "max")) { typeMapping = ExpressionExtensions.InferTypeMapping(arguments[0], arguments[1]); newArguments = new List <SqlExpression> { _sqlExpressionFactory.ApplyTypeMapping(arguments[0], typeMapping), _sqlExpressionFactory.ApplyTypeMapping(arguments[1], typeMapping) }; } else { typeMapping = arguments[0].TypeMapping; } return(_sqlExpressionFactory.Function( sqlFunctionName, newArguments ?? arguments, method.ReturnType, typeMapping)); } 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 (_methodInfoDateDiffMapping.TryGetValue(method, out var datePart)) { var startDate = arguments[1]; var endDate = arguments[2]; var typeMapping = ExpressionExtensions.InferTypeMapping(startDate, endDate); startDate = _sqlExpressionFactory.ApplyTypeMapping(startDate, typeMapping); endDate = _sqlExpressionFactory.ApplyTypeMapping(endDate, typeMapping); return(_sqlExpressionFactory.Function( "DATEDIFF", new[] { _sqlExpressionFactory.Fragment(datePart), startDate, endDate }, nullable: true, argumentsPropagateNullability: new[] { false, true, true }, typeof(int))); } 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 (_supportedMethodTranslations.TryGetValue(method, out var sqlFunctionName)) { var typeMapping = arguments.Count == 1 ? ExpressionExtensions.InferTypeMapping(arguments[0]) : ExpressionExtensions.InferTypeMapping(arguments[0], arguments[1]); var newArguments = new SqlExpression[arguments.Count]; newArguments[0] = _sqlExpressionFactory.ApplyTypeMapping(arguments[0], typeMapping); if (arguments.Count == 2) { newArguments[1] = _sqlExpressionFactory.ApplyTypeMapping(arguments[1], typeMapping); } return(_sqlExpressionFactory.Function( sqlFunctionName, newArguments, nullable: true, argumentsPropagateNullability: newArguments.Select(a => true).ToArray(), method.ReturnType, sqlFunctionName == "SIGN" ? null : typeMapping)); } if (_truncateMethodInfos.Contains(method)) { var argument = arguments[0]; return(_sqlExpressionFactory.Function( "ROUND", new[] { argument, _sqlExpressionFactory.Constant(0), _sqlExpressionFactory.Constant(1) }, nullable: true, argumentsPropagateNullability: new[] { true, false, false }, method.ReturnType, argument.TypeMapping)); } if (_roundMethodInfos.Contains(method)) { var argument = arguments[0]; var digits = arguments.Count == 2 ? arguments[1] : _sqlExpressionFactory.Constant(0); return(_sqlExpressionFactory.Function( "ROUND", new[] { argument, digits }, nullable: true, argumentsPropagateNullability: new[] { true, true }, method.ReturnType, argument.TypeMapping)); } return(null); }
public SqlExpression Translate( SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger) { // instance is null for static methods like Parse const string storeType = SqlServerHierarchyIdTypeMappingSourcePlugin.SqlServerTypeName; var callingType = instance?.Type ?? method.DeclaringType; if (typeof(HierarchyId).IsAssignableFrom(callingType) && _methodToFunctionName.TryGetValue(method, out var functionName)) { var typeMappedArguments = new List <SqlExpression>(); foreach (var argument in arguments) { var argumentTypeMapping = typeof(HierarchyId).IsAssignableFrom(argument.Type) ? _typeMappingSource.FindMapping(argument.Type, storeType) : _typeMappingSource.FindMapping(argument.Type); var mappedArgument = _sqlExpressionFactory.ApplyTypeMapping(argument, argumentTypeMapping); typeMappedArguments.Add(mappedArgument); } var resultTypeMapping = typeof(HierarchyId).IsAssignableFrom(method.ReturnType) ? _typeMappingSource.FindMapping(method.ReturnType, storeType) : _typeMappingSource.FindMapping(method.ReturnType); if (instance != null) { var instanceMapping = _typeMappingSource.FindMapping(instance.Type, storeType); instance = _sqlExpressionFactory.ApplyTypeMapping(instance, instanceMapping); return(_sqlExpressionFactory.Function( instance, functionName, simplify(arguments), nullable: true, instancePropagatesNullability: true, argumentsPropagateNullability: arguments.Select(a => true), method.ReturnType, resultTypeMapping)); } return(_sqlExpressionFactory.Function( functionName, simplify(arguments), nullable: true, argumentsPropagateNullability: arguments.Select(a => true), method.ReturnType, resultTypeMapping)); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (_supportedMethodTranslations.TryGetValue(method, out var sqlFunctionName)) { var typeMapping = arguments.Count == 1 ? ExpressionExtensions.InferTypeMapping(arguments[0]) : ExpressionExtensions.InferTypeMapping(arguments[0], arguments[1]); var newArguments = new SqlExpression[arguments.Count]; newArguments[0] = _sqlExpressionFactory.ApplyTypeMapping(arguments[0], typeMapping); if (arguments.Count == 2) { newArguments[1] = _sqlExpressionFactory.ApplyTypeMapping(arguments[1], typeMapping); } return(_sqlExpressionFactory.Function( sqlFunctionName, newArguments, method.ReturnType, sqlFunctionName == "SIGN" ? null : typeMapping)); } if (_truncateMethodInfos.Contains(method)) { var argument = arguments[0]; return(_sqlExpressionFactory.Function( "ROUND", new[] { argument, _sqlExpressionFactory.Constant(0), _sqlExpressionFactory.Constant(1) }, method.ReturnType, argument.TypeMapping)); } if (_roundMethodInfos.Contains(method)) { var argument = arguments[0]; var digits = arguments.Count == 2 ? arguments[1] : _sqlExpressionFactory.Constant(0); return(_sqlExpressionFactory.Function( "ROUND", new[] { argument, digits }, method.ReturnType, argument.TypeMapping)); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { Check.NotNull(method, nameof(method)); Check.NotNull(arguments, nameof(arguments)); if (_functionMapping.TryGetValue(method, out var functionName)) { var propertyReference = arguments[1]; if (!(propertyReference is ColumnExpression)) { throw new InvalidOperationException(SqlServerStrings.InvalidColumnNameForFreeText); } var typeMapping = propertyReference.TypeMapping; var freeText = _sqlExpressionFactory.ApplyTypeMapping(arguments[2], typeMapping); var functionArguments = new List <SqlExpression> { propertyReference, freeText }; if (arguments.Count == 4) { functionArguments.Add( _sqlExpressionFactory.Fragment($"LANGUAGE {((SqlConstantExpression)arguments[3]).Value}")); } return(_sqlExpressionFactory.Function( functionName, functionArguments, typeof(bool))); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (_functionMapping.TryGetValue(method, out var functionName)) { var propertyReference = arguments[1]; if (!(propertyReference is ColumnExpression)) { throw new InvalidOperationException("The 'FreeText' method is not supported because the query has switched to client-evaluation. Inspect the log to determine which query expressions are triggering client-evaluation."); } var typeMapping = propertyReference.TypeMapping; var freeText = _sqlExpressionFactory.ApplyTypeMapping(arguments[2], typeMapping); var functionArguments = new List <SqlExpression> { propertyReference, freeText }; if (arguments.Count == 4) { functionArguments.Add( _sqlExpressionFactory.Fragment($"LANGUAGE {((SqlConstantExpression)arguments[3]).Value}")); } return(_sqlExpressionFactory.Function( functionName, functionArguments, typeof(bool))); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (_methodInfoDateDiffMapping.TryGetValue(method, out var datePart)) { var startDate = arguments[1]; var endDate = arguments[2]; var typeMapping = ExpressionExtensions.InferTypeMapping(startDate, endDate); startDate = _sqlExpressionFactory.ApplyTypeMapping(startDate, typeMapping); endDate = _sqlExpressionFactory.ApplyTypeMapping(endDate, typeMapping); return(_sqlExpressionFactory.Function( "DATEDIFF", new[] { _sqlExpressionFactory.Fragment(datePart), startDate, endDate }, typeof(int))); } 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 (_supportedMethods.TryGetValue(method, out var sqlFunctionName)) { RelationalTypeMapping typeMapping; List <SqlExpression> newArguments = null; if (string.Equals(sqlFunctionName, "max") || string.Equals(sqlFunctionName, "max")) { typeMapping = ExpressionExtensions.InferTypeMapping(arguments[0], arguments[1]); newArguments = new List <SqlExpression> { _sqlExpressionFactory.ApplyTypeMapping(arguments[0], typeMapping), _sqlExpressionFactory.ApplyTypeMapping(arguments[1], typeMapping) }; } else { typeMapping = arguments[0].TypeMapping; } var finalArguments = newArguments ?? arguments; return(_sqlExpressionFactory.Function( sqlFunctionName, finalArguments, nullable: true, argumentsPropagateNullability: finalArguments.Select(a => true).ToList(), method.ReturnType, typeMapping)); } return(null); }
public SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger) { if (_methodInfoDateDiffMapping.TryGetValue(method, out var datePart)) { var startDate = arguments[1]; var endDate = arguments[2]; var typeMapping = ExpressionExtensions.InferTypeMapping(startDate, endDate); startDate = _sqlExpressionFactory.ApplyTypeMapping(startDate, typeMapping); endDate = _sqlExpressionFactory.ApplyTypeMapping(endDate, typeMapping); return(_sqlExpressionFactory.Function( "DATEDIFF", new[] { _sqlExpressionFactory.Constant(datePart), startDate, endDate }, false, new[] { false }, typeof(int))); } return(null); }
public SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (method.DeclaringType != typeof(NpgsqlRangeExtensions)) { return(null); } if (method.Name == nameof(NpgsqlRangeExtensions.Merge)) { var inferredMapping = ExpressionExtensions.InferTypeMapping(arguments[0], arguments[1]); return(_sqlExpressionFactory.Function( "range_merge", new[] { _sqlExpressionFactory.ApplyTypeMapping(arguments[0], inferredMapping), _sqlExpressionFactory.ApplyTypeMapping(arguments[1], inferredMapping) }, method.ReturnType, inferredMapping)); } return(method.Name switch { nameof(NpgsqlRangeExtensions.Contains) when arguments[0].Type == arguments[1].Type => BoolReturningOnTwoRanges("@>"),
/// <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 (_functionMapping.TryGetValue(method, out var functionName)) { var propertyReference = arguments[1]; if (!(propertyReference is ColumnExpression)) { throw new InvalidOperationException(SqlServerStrings.InvalidColumnNameForFreeText); } var typeMapping = propertyReference.TypeMapping; var freeText = propertyReference.Type == arguments[2].Type ? _sqlExpressionFactory.ApplyTypeMapping(arguments[2], typeMapping) : _sqlExpressionFactory.ApplyDefaultTypeMapping(arguments[2]); var functionArguments = new List <SqlExpression> { propertyReference, freeText }; if (arguments.Count == 4) { functionArguments.Add( _sqlExpressionFactory.Fragment($"LANGUAGE {((SqlConstantExpression)arguments[3]).Value}")); } return(_sqlExpressionFactory.Function( functionName, functionArguments, nullable: true, // TODO: don't propagate for now argumentsPropagateNullability: functionArguments.Select(a => false).ToList(), typeof(bool))); } return(null); }
private SqlExpression InferStringTypeMappingOrApplyDefault(SqlExpression expression, RelationalTypeMapping inferenceSourceTypeMapping) { if (expression == null) { return(null); } if (expression.TypeMapping != null) { return(expression); } if (expression.Type == typeof(string) && inferenceSourceTypeMapping?.ClrType == typeof(string)) { return(_sqlExpressionFactory.ApplyTypeMapping(expression, inferenceSourceTypeMapping)); } return(_sqlExpressionFactory.ApplyDefaultTypeMapping(expression)); }
/// <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(TranslateIndexOf(instance, method, arguments[0], null)); } if (IndexOfMethodInfoWithStartingPosition.Equals(method)) { return(TranslateIndexOf(instance, method, arguments[0], arguments[1])); } 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 (SubstringMethodInfoWithOneArg.Equals(method)) { return(_sqlExpressionFactory.Function( "SUBSTRING", new[] { instance, _sqlExpressionFactory.Add( arguments[0], _sqlExpressionFactory.Constant(1)), _sqlExpressionFactory.Function( "LEN", new[] { instance }, nullable: true, argumentsPropagateNullability: new[] { true }, typeof(int)) }, nullable: true, argumentsPropagateNullability: new[] { true, true, true }, method.ReturnType, instance.TypeMapping)); } if (SubstringMethodInfoWithTwoArgs.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 (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) { if (!(constantPattern.Value is string patternValue)) { return(_sqlExpressionFactory.Like( instance, _sqlExpressionFactory.Constant(null, stringTypeMapping))); } if (patternValue.Length == 0) { return(_sqlExpressionFactory.Constant(true)); } return(patternValue.Any(IsLikeWildChar) ? _sqlExpressionFactory.Like( instance, _sqlExpressionFactory.Constant($"%{EscapeLikePattern(patternValue)}%"), _sqlExpressionFactory.Constant(LikeEscapeString)) : _sqlExpressionFactory.Like(instance, _sqlExpressionFactory.Constant($"%{patternValue}%"))); } return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.Like( 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 (StartsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (EndsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } } if (IsNullOrEmptyMethodInfo.Equals(method)) { var argument = arguments[0]; return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.IsNull(argument), _sqlExpressionFactory.Like( argument, _sqlExpressionFactory.Constant(string.Empty)))); } if (IsNullOrWhiteSpaceMethodInfo.Equals(method)) { var argument = arguments[0]; return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.IsNull(argument), _sqlExpressionFactory.Equal( argument, _sqlExpressionFactory.Constant(string.Empty, argument.TypeMapping)))); } 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)); } return(null); }
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 (_startsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (_endsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } return(null); }
public virtual SqlExpression Translate( SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger) { if (method == IndexOfString || method == IndexOfChar) { var argument = arguments[0]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, argument); return(_sqlExpressionFactory.Subtract( _sqlExpressionFactory.Function( "strpos", new[] { _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(argument, stringTypeMapping) }, nullable: true, argumentsPropagateNullability: TrueArrays[2], method.ReturnType), _sqlExpressionFactory.Constant(1))); } if (method == Replace) { var oldValue = arguments[0]; var newValue = arguments[1]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, oldValue, newValue); return(_sqlExpressionFactory.Function( "replace", new[] { _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(oldValue, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(newValue, stringTypeMapping) }, nullable: true, argumentsPropagateNullability: TrueArrays[3], method.ReturnType, stringTypeMapping)); } if (method == ToLower || method == ToUpper) { return(_sqlExpressionFactory.Function( method == ToLower ? "lower" : "upper", new[] { instance }, nullable: true, argumentsPropagateNullability: TrueArrays[1], method.ReturnType, instance.TypeMapping)); } if (method == Substring || method == SubstringWithLength) { var args = method == Substring ? new[] { instance, GenerateOneBasedIndexExpression(arguments[0]) } : new[] { instance, GenerateOneBasedIndexExpression(arguments[0]), arguments[1] }; return(_sqlExpressionFactory.Function( "substring", args, nullable: true, argumentsPropagateNullability: TrueArrays[args.Length], method.ReturnType, instance.TypeMapping)); } if (method == IsNullOrWhiteSpace) { var argument = arguments[0]; return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.IsNull(argument), _sqlExpressionFactory.Equal( _sqlExpressionFactory.Function( "btrim", new[] { argument, _whitespace }, nullable: true, argumentsPropagateNullability: TrueArrays[2], argument.Type, argument.TypeMapping), _sqlExpressionFactory.Constant(string.Empty, argument.TypeMapping)))); } var isTrimStart = method == TrimStartWithNoParam || method == TrimStartWithChars || method == TrimStartWithSingleChar; var isTrimEnd = method == TrimEndWithNoParam || method == TrimEndWithChars || method == TrimEndWithSingleChar; var isTrimBoth = method == TrimBothWithNoParam || method == TrimBothWithChars || method == TrimBothWithSingleChar; if (isTrimStart || isTrimEnd || isTrimBoth) { char[] trimChars = null; if (method == TrimStartWithChars || method == TrimStartWithSingleChar || method == TrimEndWithChars || method == TrimEndWithSingleChar || method == TrimBothWithChars || method == TrimBothWithSingleChar) { var constantTrimChars = arguments[0] as SqlConstantExpression; if (constantTrimChars == null) { return(null); // Don't translate if trim chars isn't a constant } trimChars = constantTrimChars.Value is char c ? new[] { c } : (char[])constantTrimChars.Value; } return(_sqlExpressionFactory.Function( isTrimStart ? "ltrim" : isTrimEnd ? "rtrim" : "btrim", new[] { instance, trimChars == null || trimChars.Length == 0 ? _whitespace : _sqlExpressionFactory.Constant(new string(trimChars)) }, nullable: true, argumentsPropagateNullability: TrueArrays[2], instance.Type, instance.TypeMapping)); } if (method == Contains) { var pattern = arguments[0]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, pattern); instance = _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping); pattern = _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping); var strposCheck = _sqlExpressionFactory.GreaterThan( _sqlExpressionFactory.Function( "strpos", new[] { _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping) }, nullable: true, argumentsPropagateNullability: TrueArrays[2], typeof(int)), _sqlExpressionFactory.Constant(0)); if (pattern is SqlConstantExpression constantPattern) { return((string)constantPattern.Value == string.Empty ? (SqlExpression)_sqlExpressionFactory.Constant(true) : strposCheck); } return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.Equal( pattern, _sqlExpressionFactory.Constant(string.Empty, stringTypeMapping)), strposCheck)); } if (method == PadLeft || method == PadLeftWithChar || method == PadRight || method == PadRightWithChar) { var args = method == PadLeft || method == PadRight ? new[] { instance, arguments[0] } : new[] { instance, arguments[0], arguments[1] }; return(_sqlExpressionFactory.Function( method == PadLeft || method == PadLeftWithChar ? "lpad" : "rpad", args, nullable: true, argumentsPropagateNullability: TrueArrays[args.Length], instance.Type, instance.TypeMapping)); } if (method == FirstOrDefaultMethodInfoWithoutArgs) { var argument = arguments[0]; return(_sqlExpressionFactory.Function( "substr", new[] { argument, _sqlExpressionFactory.Constant(1), _sqlExpressionFactory.Constant(1) }, nullable: true, argumentsPropagateNullability: TrueArrays[3], method.ReturnType)); } if (method == LastOrDefaultMethodInfoWithoutArgs) { 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: TrueArrays[3], method.ReturnType)); } if (method == DbFunctionsReverse) { return(_sqlExpressionFactory.Function( "reverse", new[] { arguments[1] }, nullable: true, argumentsPropagateNullability: TrueArrays[1], typeof(string), arguments[1].TypeMapping)); } if (method == StartsWith) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (method == EndsWith) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (typeof(Geometry).IsAssignableFrom(method.DeclaringType)) { var geometryExpressions = new[] { instance }.Concat( arguments.Where(e => typeof(Geometry).IsAssignableFrom(e.Type))); var typeMapping = ExpressionExtensions.InferTypeMapping(geometryExpressions.ToArray()); Debug.Assert(typeMapping != null, "At least one argument must have typeMapping."); var storeType = typeMapping.StoreType; if (_methodToFunctionName.TryGetValue(method, out var functionName) || _geometryMethodToFunctionName.TryGetValue(method, out functionName)) { instance = _sqlExpressionFactory.ApplyTypeMapping( instance, _typeMappingSource.FindMapping(instance.Type, storeType)); var typeMappedArguments = new List <SqlExpression> { instance }; foreach (var argument in arguments) { typeMappedArguments.Add( _sqlExpressionFactory.ApplyTypeMapping( argument, typeof(Geometry).IsAssignableFrom(argument.Type) ? _typeMappingSource.FindMapping(argument.Type, storeType) : _typeMappingSource.FindMapping(argument.Type))); } var resultTypeMapping = typeof(Geometry).IsAssignableFrom(method.ReturnType) ? _typeMappingSource.FindMapping(method.ReturnType, storeType) : _typeMappingSource.FindMapping(method.ReturnType); return(_sqlExpressionFactory.Function( functionName, typeMappedArguments, method.ReturnType, resultTypeMapping)); } if (Equals(method, _getGeometryN)) { return(_sqlExpressionFactory.Function( "ST_GeometryN", new[] { instance, _sqlExpressionFactory.Add( arguments[0], _sqlExpressionFactory.Constant(1)) }, method.ReturnType, _typeMappingSource.FindMapping(method.ReturnType, storeType))); } if (Equals(method, _distance)) { return(GetDistanceCallBySrid( instance, arguments[0], method.ReturnType, _typeMappingSource.FindMapping(method.ReturnType, storeType))); } if (Equals(method, _isWithinDistance)) { return(_sqlExpressionFactory.LessThanOrEqual( GetDistanceCallBySrid( instance, arguments[0], _distance.ReturnType, _typeMappingSource.FindMapping(_distance.ReturnType)), arguments[1])); } } 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 (typeof(Geometry).IsAssignableFrom(method.DeclaringType) && instance != null) { var geometryExpressions = new[] { instance }.Concat( arguments.Where(e => typeof(Geometry).IsAssignableFrom(e.Type))); var typeMapping = ExpressionExtensions.InferTypeMapping(geometryExpressions.ToArray()); Check.DebugAssert(typeMapping != null, "At least one argument must have typeMapping."); var storeType = typeMapping.StoreType; var isGeography = string.Equals(storeType, "geography", StringComparison.OrdinalIgnoreCase); if (_methodToFunctionName.TryGetValue(method, out var functionName) || (!isGeography && _geometryMethodToFunctionName.TryGetValue(method, out functionName))) { instance = _sqlExpressionFactory.ApplyTypeMapping( instance, _typeMappingSource.FindMapping(instance.Type, storeType)); var typeMappedArguments = new List <SqlExpression>(); foreach (var argument in arguments) { typeMappedArguments.Add( _sqlExpressionFactory.ApplyTypeMapping( argument, typeof(Geometry).IsAssignableFrom(argument.Type) ? _typeMappingSource.FindMapping(argument.Type, storeType) : _typeMappingSource.FindMapping(argument.Type))); } var resultTypeMapping = typeof(Geometry).IsAssignableFrom(method.ReturnType) ? _typeMappingSource.FindMapping(method.ReturnType, storeType) : _typeMappingSource.FindMapping(method.ReturnType); var finalArguments = Simplify(typeMappedArguments, isGeography); var argumentsPropagateNullability = functionName == "STBuffer" ? new[] { false } : functionName == "STRelate" ? new[] { true, false } : finalArguments.Select(a => true).ToArray(); return(_sqlExpressionFactory.Function( instance, functionName, finalArguments, nullable: true, instancePropagatesNullability: true, argumentsPropagateNullability, method.ReturnType, resultTypeMapping)); } if (Equals(method, _getGeometryN)) { return(_sqlExpressionFactory.Function( instance, "STGeometryN", new[] { _sqlExpressionFactory.Add( arguments[0], _sqlExpressionFactory.Constant(1)) }, nullable: true, instancePropagatesNullability: true, argumentsPropagateNullability: new[] { false }, method.ReturnType, _typeMappingSource.FindMapping(method.ReturnType, storeType))); } if (Equals(method, _isWithinDistance)) { instance = _sqlExpressionFactory.ApplyTypeMapping( instance, _typeMappingSource.FindMapping(instance.Type, storeType)); var typeMappedArguments = new List <SqlExpression>(); foreach (var argument in arguments) { typeMappedArguments.Add( _sqlExpressionFactory.ApplyTypeMapping( argument, typeof(Geometry).IsAssignableFrom(argument.Type) ? _typeMappingSource.FindMapping(argument.Type, storeType) : _typeMappingSource.FindMapping(argument.Type))); } var finalArguments = Simplify(new[] { typeMappedArguments[0] }, isGeography); return(_sqlExpressionFactory.LessThanOrEqual( _sqlExpressionFactory.Function( instance, "STDistance", finalArguments, nullable: true, instancePropagatesNullability: true, argumentsPropagateNullability: finalArguments.Select(a => true), typeof(double)), typeMappedArguments[1])); } } return(null); }
/// <inheritdoc /> public virtual SqlExpression Translate( SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger) { if (SupportedMethodTranslations.TryGetValue(method, out var sqlFunctionName)) { var typeMapping = arguments.Count == 1 ? ExpressionExtensions.InferTypeMapping(arguments[0]) : ExpressionExtensions.InferTypeMapping(arguments[0], arguments[1]); var newArguments = new SqlExpression[arguments.Count]; newArguments[0] = _sqlExpressionFactory.ApplyTypeMapping(arguments[0], typeMapping); if (arguments.Count == 2) { newArguments[1] = _sqlExpressionFactory.ApplyTypeMapping(arguments[1], typeMapping); } // Note: GREATER/LEAST only return NULL if *all* arguments are null, but we currently can't // convey this. return(_sqlExpressionFactory.Function( sqlFunctionName, newArguments, nullable: true, argumentsPropagateNullability: TrueArrays[newArguments.Length], method.ReturnType, typeMapping)); } // PostgreSQL sign() returns 1, 0, -1, but in the same type as the argument, so we need to convert // the return type to int. if (SignMethodInfos.Contains(method)) { return (_sqlExpressionFactory.Convert( _sqlExpressionFactory.Function( "sign", arguments, nullable: true, argumentsPropagateNullability: TrueArrays[1], method.ReturnType), typeof(int), _typeMappingSource.FindMapping(typeof(int)))); } if (method == RoundDecimalTwoParams) { return(_sqlExpressionFactory.Function("round", new[] { _sqlExpressionFactory.ApplyDefaultTypeMapping(arguments[0]), _sqlExpressionFactory.ApplyDefaultTypeMapping(arguments[1]) }, nullable: true, argumentsPropagateNullability: TrueArrays[2], method.ReturnType, _typeMappingSource.FindMapping(typeof(decimal)))); } // PostgreSQL treats NaN values as equal, against IEEE754 if (method == DoubleIsNanMethodInfo) { return(_sqlExpressionFactory.Equal(arguments[0], _sqlExpressionFactory.Constant(double.NaN))); } if (method == FloatIsNanMethodInfo) { return(_sqlExpressionFactory.Equal(arguments[0], _sqlExpressionFactory.Constant(float.NaN))); } if (method == DoubleIsPositiveInfinityMethodInfo) { return(_sqlExpressionFactory.Equal(arguments[0], _sqlExpressionFactory.Constant(double.PositiveInfinity))); } if (method == FloatIsPositiveInfinityMethodInfo) { return(_sqlExpressionFactory.Equal(arguments[0], _sqlExpressionFactory.Constant(float.PositiveInfinity))); } if (method == DoubleIsNegativeInfinityMethodInfo) { return(_sqlExpressionFactory.Equal(arguments[0], _sqlExpressionFactory.Constant(double.NegativeInfinity))); } if (method == FloatIsNegativeInfinityMethodInfo) { return(_sqlExpressionFactory.Equal(arguments[0], _sqlExpressionFactory.Constant(float.NegativeInfinity))); } return(null); }
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 (_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 (_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) { if (!(constantPattern.Value is string patternValue)) { return(_sqlExpressionFactory.Like( instance, _sqlExpressionFactory.Constant(null, stringTypeMapping))); } if (patternValue.Length == 0) { return(_sqlExpressionFactory.Constant(true)); } return(patternValue.Any(IsLikeWildChar) ? _sqlExpressionFactory.Like( instance, _sqlExpressionFactory.Constant($"%{EscapeLikePattern(patternValue)}%"), _sqlExpressionFactory.Constant(LikeEscapeString)) : _sqlExpressionFactory.Like(instance, _sqlExpressionFactory.Constant($"%{patternValue}%"))); } return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.Like( 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 (_startsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (_endsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } } if (_isNullOrEmptyMethodInfo.Equals(method)) { var argument = arguments[0]; return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.IsNull(argument), _sqlExpressionFactory.Like( argument, _sqlExpressionFactory.Constant(string.Empty)))); } if (_isNullOrWhiteSpaceMethodInfo.Equals(method)) { var argument = arguments[0]; return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.IsNull(argument), _sqlExpressionFactory.Equal( argument, _sqlExpressionFactory.Constant(string.Empty, argument.TypeMapping)))); } 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)); } return(null); }
public SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (method == IndexOfString || method == IndexOfChar) { var argument = arguments[0]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, argument); return(_sqlExpressionFactory.Subtract( _sqlExpressionFactory.Function( "STRPOS", new[] { _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(argument, stringTypeMapping) }, method.ReturnType), _sqlExpressionFactory.Constant(1))); } if (method == Replace) { var oldValue = arguments[0]; var newValue = arguments[1]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, oldValue, newValue); return(_sqlExpressionFactory.Function( "REPLACE", new[] { _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(oldValue, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(newValue, stringTypeMapping) }, method.ReturnType, stringTypeMapping)); } if (method == ToLower || method == ToUpper) { return(_sqlExpressionFactory.Function( method == ToLower ? "LOWER" : "UPPER", new[] { instance }, method.ReturnType, instance.TypeMapping)); } if (method == Substring || method == SubstringWithLength) { var args = method == Substring ? new[] { instance, GenerateOneBasedIndexExpression(arguments[0]) } : new[] { instance, GenerateOneBasedIndexExpression(arguments[0]), arguments[1] }; return(_sqlExpressionFactory.Function( "SUBSTRING", args, method.ReturnType, instance.TypeMapping)); } if (method == IsNullOrWhiteSpace) { var argument = arguments[0]; return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.IsNull(argument), _sqlExpressionFactory.Equal( _sqlExpressionFactory.Function( "BTRIM", new[] { argument, _whitespace }, argument.Type, argument.TypeMapping), _sqlExpressionFactory.Constant(string.Empty, argument.TypeMapping)))); } var isTrimStart = method == TrimStartWithNoParam || method == TrimStartWithChars || method == TrimStartWithSingleChar; var isTrimEnd = method == TrimEndWithNoParam || method == TrimEndWithChars || method == TrimEndWithSingleChar; var isTrimBoth = method == TrimBothWithNoParam || method == TrimBothWithChars || method == TrimBothWithSingleChar; if (isTrimStart || isTrimEnd || isTrimBoth) { char[] trimChars = null; if (method == TrimStartWithChars || method == TrimStartWithSingleChar || method == TrimEndWithChars || method == TrimEndWithSingleChar || method == TrimBothWithChars || method == TrimBothWithSingleChar) { var constantTrimChars = arguments[0] as SqlConstantExpression; if (constantTrimChars == null) { return(null); // Don't translate if trim chars isn't a constant } trimChars = constantTrimChars.Value is char c ? new[] { c } : (char[])constantTrimChars.Value; } return(_sqlExpressionFactory.Function( isTrimStart ? "LTRIM" : isTrimEnd ? "RTRIM" : "BTRIM", new[] { instance, trimChars == null || trimChars.Length == 0 ? _whitespace : _sqlExpressionFactory.Constant(new string(trimChars)) }, instance.Type, instance.TypeMapping)); } if (method == Contains) { var pattern = arguments[0]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, pattern); instance = _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping); pattern = _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping); var strposCheck = _sqlExpressionFactory.GreaterThan( _sqlExpressionFactory.Function( "STRPOS", new[] { _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping), _sqlExpressionFactory.ApplyTypeMapping(pattern, stringTypeMapping) }, typeof(int)), _sqlExpressionFactory.Constant(0)); if (pattern is SqlConstantExpression constantPattern) { return((string)constantPattern.Value == string.Empty ? (SqlExpression)_sqlExpressionFactory.Constant(true) : strposCheck); } return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.Equal( pattern, _sqlExpressionFactory.Constant(string.Empty, stringTypeMapping)), strposCheck)); } if (method == PadLeft || method == PadLeftWithChar || method == PadRight || method == PadRightWithChar) { var args = method == PadLeft || method == PadRight ? new[] { instance, arguments[0] } : new[] { instance, arguments[0], arguments[1] }; return(_sqlExpressionFactory.Function( method == PadLeft || method == PadLeftWithChar ? "lpad" : "rpad", args, instance.Type, instance.TypeMapping)); } if (method == StartsWith) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (method == EndsWith) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (_indexOfMethodInfo.Equals(method)) { var argument = arguments[0]; var stringTypeMapping = ExpressionExtensions.InferTypeMapping(instance, argument); argument = _sqlExpressionFactory.ApplyTypeMapping(argument, stringTypeMapping); var charIndexExpression = _sqlExpressionFactory.Subtract( _sqlExpressionFactory.Function( "CHARINDEX", new[] { argument, _sqlExpressionFactory.ApplyTypeMapping(instance, stringTypeMapping) }, method.ReturnType), _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 }, method.ReturnType, stringTypeMapping)); } if (_toLowerMethodInfo.Equals(method) || _toUpperMethodInfo.Equals(method)) { return(_sqlExpressionFactory.Function( _toLowerMethodInfo.Equals(method) ? "LOWER" : "UPPER", new[] { instance }, method.ReturnType, instance.TypeMapping)); } if (_substringMethodInfo.Equals(method)) { return(_sqlExpressionFactory.Function( "SUBSTRING", new[] { instance, _sqlExpressionFactory.Add( arguments[0], _sqlExpressionFactory.Constant(1)), arguments[1] }, 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 }, argument.Type, argument.TypeMapping) }, 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 }, 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 }, 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 }, instance.Type, instance.TypeMapping) }, 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) { if ((string)constantPattern.Value == string.Empty) { return(_sqlExpressionFactory.Constant(true)); } return(_sqlExpressionFactory.GreaterThan( _sqlExpressionFactory.Function( "CHARINDEX", new[] { pattern, instance }, typeof(int)), _sqlExpressionFactory.Constant(0))); } return(_sqlExpressionFactory.OrElse( _sqlExpressionFactory.Equal( pattern, _sqlExpressionFactory.Constant(string.Empty, stringTypeMapping)), _sqlExpressionFactory.GreaterThan( _sqlExpressionFactory.Function( "CHARINDEX", new[] { pattern, instance }, typeof(int)), _sqlExpressionFactory.Constant(0)))); } if (_startsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (_endsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } return(null); }
public SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments, IDiagnosticsLogger <DbLoggerCategory.Query> logger) { if (_methodInfoDateAddMapping != null && _methodInfoDateAddMapping.TryGetValue(method, out var dateAddPart)) { return(arguments[0] is SqlConstantExpression sqlConstant && ((sqlConstant.Value is double && ((double)sqlConstant.Value >= int.MaxValue || (double)sqlConstant.Value <= int.MinValue)) || (sqlConstant.Value is long && ((long)sqlConstant.Value >= int.MaxValue || (long)sqlConstant.Value <= int.MinValue))) ? null : _sqlExpressionFactory.Function( "DATEADD", new[] { _sqlExpressionFactory.Fragment(dateAddPart), _sqlExpressionFactory.Convert(arguments[0], typeof(int)), instance }, instance.Type, instance.TypeMapping)); } else if (_methodInfoDateAddExtensionMapping != null && _methodInfoDateAddExtensionMapping.TryGetValue(method, out var dateAddExtensionPart)) { return(arguments[1] is SqlConstantExpression sqlConstant && ((sqlConstant.Value is double && ((double)sqlConstant.Value >= int.MaxValue || (double)sqlConstant.Value <= int.MinValue)) || (sqlConstant.Value is long && ((long)sqlConstant.Value >= int.MaxValue || (long)sqlConstant.Value <= int.MinValue))) ? null : _sqlExpressionFactory.Function( "DATEADD", new[] { _sqlExpressionFactory.Fragment(dateAddExtensionPart), _sqlExpressionFactory.Convert(arguments[1], typeof(int)), arguments[0] }, arguments[0].Type, arguments[0].TypeMapping)); } else if (_methodInfoDatePartExtensionMapping != null && _methodInfoDatePartExtensionMapping.TryGetValue(method, out var datePart)) { return(_sqlExpressionFactory.Function( "DATEPART", new[] { _sqlExpressionFactory.Fragment(datePart), arguments[0] }, method.ReturnType, null)); } else if (_methodInfoDateDiffMapping != null && _methodInfoDateDiffMapping.TryGetValue(method, out var dateDiffDatePart)) { var startDate = arguments[1]; var endDate = arguments[2]; var typeMapping = ExpressionExtensions.InferTypeMapping(startDate, endDate); startDate = _sqlExpressionFactory.ApplyTypeMapping(startDate, typeMapping); endDate = _sqlExpressionFactory.ApplyTypeMapping(endDate, typeMapping); return(_sqlExpressionFactory.Function( "DATEDIFF", new[] { _sqlExpressionFactory.Fragment(dateDiffDatePart), startDate, endDate }, method.ReturnType, null)); } else if (_methodInfoDateDiffBigMapping != null && _methodInfoDateDiffBigMapping.TryGetValue(method, out var dateDiffBigDatePart)) { var startDate = arguments[1]; var endDate = arguments[2]; var typeMapping = ExpressionExtensions.InferTypeMapping(startDate, endDate); startDate = _sqlExpressionFactory.ApplyTypeMapping(startDate, typeMapping); endDate = _sqlExpressionFactory.ApplyTypeMapping(endDate, typeMapping); return(_sqlExpressionFactory.Function( "DATEDIFF_BIG", new[] { _sqlExpressionFactory.Fragment(dateDiffBigDatePart), startDate, endDate }, method.ReturnType, null)); } return(null); }
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 (_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 (_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 (_startsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (_endsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } } 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 (_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)); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { 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) }, true, null, 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) }, true, null, method.ReturnType, stringTypeMapping)); } if (_toLowerMethodInfo.Equals(method) || _toUpperMethodInfo.Equals(method)) { return(_sqlExpressionFactory.Function( _toLowerMethodInfo.Equals(method) ? "lower" : "upper", new[] { instance }, true, null, method.ReturnType, instance.TypeMapping)); } if (_substringMethodInfo.Equals(method)) { return(_sqlExpressionFactory.Function( "substr", new[] { instance, _sqlExpressionFactory.Add(arguments[0], _sqlExpressionFactory.Constant(1)), arguments[1] }, true, null, 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 }, true, null, 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 }, true, null, typeof(int)), _sqlExpressionFactory.Constant(0)))); } if (_startsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (_endsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } return(null); }
public virtual SqlExpression Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (typeof(Geometry).IsAssignableFrom(method.DeclaringType)) { var geometryExpressions = new[] { instance }.Concat( arguments.Where(e => typeof(Geometry).IsAssignableFrom(e.Type))); var typeMapping = ExpressionExtensions.InferTypeMapping(geometryExpressions.ToArray()); Debug.Assert(typeMapping != null, "At least one argument must have typeMapping."); var storeType = typeMapping.StoreType; var isGeography = string.Equals(storeType, "geography", StringComparison.OrdinalIgnoreCase); if (_methodToFunctionName.TryGetValue(method, out var functionName) || (!isGeography && _geometryMethodToFunctionName.TryGetValue(method, out functionName))) { instance = _sqlExpressionFactory.ApplyTypeMapping( instance, _typeMappingSource.FindMapping(instance.Type, storeType)); var typeMappedArguments = new List <SqlExpression>(); foreach (var argument in arguments) { typeMappedArguments.Add( _sqlExpressionFactory.ApplyTypeMapping( argument, typeof(Geometry).IsAssignableFrom(argument.Type) ? _typeMappingSource.FindMapping(argument.Type, storeType) : _typeMappingSource.FindMapping(argument.Type))); } var resultTypeMapping = typeof(Geometry).IsAssignableFrom(method.ReturnType) ? _typeMappingSource.FindMapping(method.ReturnType, storeType) : _typeMappingSource.FindMapping(method.ReturnType); return(_sqlExpressionFactory.Function( instance, functionName, Simplify(typeMappedArguments, isGeography), method.ReturnType, resultTypeMapping)); } if (Equals(method, _getGeometryN)) { return(_sqlExpressionFactory.Function( instance, "STGeometryN", new[] { _sqlExpressionFactory.Add( arguments[0], _sqlExpressionFactory.Constant(1)) }, method.ReturnType, _typeMappingSource.FindMapping(method.ReturnType, storeType))); } if (Equals(method, _isWithinDistance)) { instance = _sqlExpressionFactory.ApplyTypeMapping( instance, _typeMappingSource.FindMapping(instance.Type, storeType)); var typeMappedArguments = new List <SqlExpression>(); foreach (var argument in arguments) { typeMappedArguments.Add( _sqlExpressionFactory.ApplyTypeMapping( argument, typeof(Geometry).IsAssignableFrom(argument.Type) ? _typeMappingSource.FindMapping(argument.Type, storeType) : _typeMappingSource.FindMapping(argument.Type))); } return(_sqlExpressionFactory.LessThanOrEqual( _sqlExpressionFactory.Function( instance, "STDistance", Simplify(new[] { typeMappedArguments[0] }, isGeography), typeof(double)), typeMappedArguments[1])); } } return(null); }
public SqlExpression?Translate(SqlExpression instance, MethodInfo method, IReadOnlyList <SqlExpression> arguments) { if (_toLowerMethodInfo.Equals(method) || _toUpperMethodInfo.Equals(method)) { return(_sqlExpressionFactory.Function( _toLowerMethodInfo.Equals(method) ? "LOWER" : "UPPER", new[] { instance }, method.ReturnType, instance.TypeMapping)); } if (_substringMethodInfo.Equals(method)) { return(_sqlExpressionFactory.Function( "SUBSTRING", new[] { instance, _sqlExpressionFactory.Add(arguments[0], _sqlExpressionFactory.Constant(1)), arguments[1] }, 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 }, argument.Type, argument.TypeMapping), _sqlExpressionFactory.Constant(string.Empty)))); } 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 constantExpression) { if (constantExpression.Value is string constantString) { return(constantString.Any(c => IsLikeWildChar(c)) ? _sqlExpressionFactory.Like( instance, _sqlExpressionFactory.Constant('%' + EscapeLikePattern(constantString) + '%')) : _sqlExpressionFactory.Like( instance, _sqlExpressionFactory.Constant('%' + constantString + '%'))); } } } if (_startsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], true)); } if (_endsWithMethodInfo.Equals(method)) { return(TranslateStartsEndsWith(instance, arguments[0], false)); } return(null); }