NHibernate 执行简单查询需要更长的时间
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【中文标题】NHibernate 执行简单查询需要更长的时间【英文标题】：NHibernate taking longer time executing simple query 【发布时间】：2012-08-17 01:23:50 【问题描述】：我在 NHibernate 遇到了一个非常奇怪的问题，现在它变得头疼了。
NHibernate 执行这样一个简单查询所花费的时间（2-3 分钟）比预期的时间（几毫秒）要长。数据库是 Oracle，我正在使用 ODP 驱动程序。我已经检查了 NHibernate 和 Spring 的所有必要配置，这对我来说看起来不错。当我在 sqldeveloper 中执行相同的查询时，它会以毫秒为单位给出结果。
仅供参考 - 当我执行另一个查询时，该查询具有三个具有相同 NHibernate 配置的复杂模型的内部联接，我得到了预期的结果。
在调试日志中，我可以看到以下几行浪费时间：
2012-08-17 09:53:20,754 [TestRunnerThread] DEBUG - NHibernate.Connection.DriverConnectionProvider - Obtaining IDbConnection from Driver
2012-08-17 09:55:09,369 [TestRunnerThread] DEBUG - NHibernate.AdoNet.AbstractBatcher - ExecuteReader took 108720 ms
NHibernate 属性设置：
<nhibernatePropertiesSettings>
<setting name="nhibernate.connection.provider" serializeAs="String">
<value>NHibernate.Connection.DriverConnectionProvider</value>
</setting>
<setting name="nhibernate.connection.driver.class" serializeAs="String">
<value>NHibernate.Driver.OracleDataClientDriver</value>
</setting>
<setting name="nhibernate.dialect" serializeAs="String">
<value>NHibernate.Dialect.Oracle10gDialect</value>
</setting>
<setting name="nhibernate.show.sql" serializeAs="String">
<value>true</value>
</setting>
<setting name="nhibernate.query.substitutions" serializeAs="String">
<value>true 1, false 0, yes 'Y', no 'N'</value>
</setting>
<setting name="nhibernate.use.proxy.validator" serializeAs="String">
<value>false</value>
</setting>
<setting name="nhibernate.template.flush.mode" serializeAs="String">
<value>Never</value>
</setting>
</nhibernatePropertiesSettings>
弹簧属性设置：
<springPropertiesSettings>
<setting name="spring.db.provider" serializeAs="String">
<value>OracleODP-11-2.0</value>
</setting>
</springPropertiesSettings>
映射：
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
<class name="XYZ.PaymentInvestigation.Service.Model.PaymentMessageHistory, PaymentInvestigation.Service.Model" table="MESSAGE_HIST_T" lazy="false">
<composite-id name="PaymentMessageHistoryId" class="XYZ.PaymentInvestigation.Service.Model.PaymentMessageHistoryId, PaymentInvestigation.Service.Model" unsaved-value="undefined">
<key-property name="TransactionDate" column="TRN_DATE" />
<key-property name="TransactionReferenceNumber" column="TRN_NUMBER" />
<key-property name="TransactionTimeStamp" column="TRN_TIMESTAMP" />
<key-property name="HistoryNumber" type="AnsiString" column="HIST_NO" />
<key-property name="SubHistoryNumber" type="AnsiString" column="SUB_HIST_NO" />
</composite-id>
<property name="EntryType" column="ENTRY_TYPE" update="false" insert="false" />
<property name="Location" column="LOC" update="false" insert="false" />
<property name="QueLineId" column="QUE_LINE_ID" update="false" insert="false" />
<property name="DateTime" column="DATE_TIME" update="false" insert="false" />
<property name="SequenceNo" column="SEQUENCE_NO" update="false" insert="false" />
<property name="OperatorInitials" column="OPR_INITIALS" update="false" insert="false" />
<property name="Amount" column="AMOUNT" update="false" insert="false" />
<property name="MsgInfo" column="MSG_INFO" update="false" insert="false" />
<property name="RecordExpired" column="RECORD_EXPIRED" update="false" insert="false" />
<property name="RecordUpdated" column="RECORD_UPDATED" update="false" insert="false" />
<property name="Details" column="DETAILS" update="false" insert="false" />
</class>
查询：
IList<PaymentMessageHistory> paymentMessageHistories =
HibernateTemplate.ExecuteFind(session => session
.QueryOver<PaymentMessageHistory>()
.Where(x =>
x.PaymentMessageHistoryId.TransactionDate == paymentMessageId.TransactionDate &&
x.PaymentMessageHistoryId.TransactionReferenceNumber == paymentMessageId.TransactionReferenceNumber)
.List());
PaymentMessageHistoryId 模型：
public class PaymentMessageHistoryId : IEquatable<PaymentMessageHistoryId>
public virtual DateTime TransactionDate get; set;
public virtual int TransactionReferenceNumber get; set;
public virtual double TransactionTimeStamp get; set;
public virtual string HistoryNumber get; set;
public virtual string SubHistoryNumber get; set;
public bool Equals(PaymentMessageHistoryId other)
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return other.TransactionDate.Equals(TransactionDate) && other.TransactionReferenceNumber == TransactionReferenceNumber && other.TransactionTimeStamp.Equals(TransactionTimeStamp) && Equals(other.HistoryNumber, HistoryNumber) && Equals(other.SubHistoryNumber, SubHistoryNumber);
public override bool Equals(object obj)
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
if (obj.GetType() != typeof (PaymentMessageHistoryId)) return false;
return Equals((PaymentMessageHistoryId) obj);
public override int GetHashCode()
unchecked
int result = TransactionDate.GetHashCode();
result = (result*397) ^ TransactionReferenceNumber;
result = (result*397) ^ TransactionTimeStamp.GetHashCode();
result = (result*397) ^ (HistoryNumber != null ? HistoryNumber.GetHashCode() : 0);
result = (result*397) ^ (SubHistoryNumber != null ? SubHistoryNumber.GetHashCode() : 0);
return result;
public static bool operator ==(PaymentMessageHistoryId left, PaymentMessageHistoryId right)
return Equals(left, right);
public static bool operator !=(PaymentMessageHistoryId left, PaymentMessageHistoryId right)
return !Equals(left, right);
public override string ToString()
return string.Format("TransactionDate: 0, TransactionReferenceNumber: 1, TransactionTimeStamp: 2, HistoryNumber: 3, SubHistoryNumber: 4", TransactionDate, TransactionReferenceNumber, TransactionTimeStamp, HistoryNumber, SubHistoryNumber);
PaymentMessageHistory 模型：
public class PaymentMessageHistory : IEquatable<PaymentMessageHistory>
public virtual PaymentMessageHistoryId PaymentMessageHistoryId get; set;
public virtual string EntryType get; set;
public virtual string Location get; set;
public virtual string QueLineId get; set;
public virtual string DateTime get; set;
public virtual string SequenceNo get; set;
public virtual string OperatorInitials get; set;
public virtual decimal Amount get; set;
public virtual string MsgInfo get; set;
public virtual double RecordExpired get; set;
public virtual string RecordUpdated get; set;
public virtual string Details get; set;
public bool Equals(PaymentMessageHistory other)
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return Equals(other.PaymentMessageHistoryId, PaymentMessageHistoryId) && Equals(other.EntryType, EntryType) && Equals(other.Location, Location) && Equals(other.QueLineId, QueLineId) && Equals(other.DateTime, DateTime) && Equals(other.SequenceNo, SequenceNo) && Equals(other.OperatorInitials, OperatorInitials) && other.Amount == Amount && Equals(other.MsgInfo, MsgInfo) && other.RecordExpired.Equals(RecordExpired) && Equals(other.RecordUpdated, RecordUpdated) && Equals(other.Details, Details);
public override bool Equals(object obj)
if (ReferenceEquals(null, obj)) return false;
if (ReferenceEquals(this, obj)) return true;
if (obj.GetType() != typeof (PaymentMessageHistory)) return false;
return Equals((PaymentMessageHistory) obj);
public override int GetHashCode()
unchecked
int result = (PaymentMessageHistoryId != null ? PaymentMessageHistoryId.GetHashCode() : 0);
result = (result*397) ^ (EntryType != null ? EntryType.GetHashCode() : 0);
result = (result*397) ^ (Location != null ? Location.GetHashCode() : 0);
result = (result*397) ^ (QueLineId != null ? QueLineId.GetHashCode() : 0);
result = (result*397) ^ (DateTime != null ? DateTime.GetHashCode() : 0);
result = (result*397) ^ (SequenceNo != null ? SequenceNo.GetHashCode() : 0);
result = (result*397) ^ (OperatorInitials != null ? OperatorInitials.GetHashCode() : 0);
result = (result*397) ^ Amount.GetHashCode();
result = (result*397) ^ (MsgInfo != null ? MsgInfo.GetHashCode() : 0);
result = (result*397) ^ RecordExpired.GetHashCode();
result = (result*397) ^ (RecordUpdated != null ? RecordUpdated.GetHashCode() : 0);
result = (result*397) ^ (Details != null ? Details.GetHashCode() : 0);
return result;
public static bool operator ==(PaymentMessageHistory left, PaymentMessageHistory right)
return Equals(left, right);
public static bool operator !=(PaymentMessageHistory left, PaymentMessageHistory right)
return !Equals(left, right);
public override string ToString()
return string.Format("PaymentMessageHistoryId: 0, EntryType: 1, Location: 2, QueLineId: 3, DateTime: 4, SequenceNo: 5, OperatorInitials: 6, Amount: 7, MsgInfo: 8, RecordExpired: 9, RecordUpdated: 10, Details: 11", PaymentMessageHistoryId, EntryType, Location, QueLineId, DateTime, SequenceNo, OperatorInitials, Amount, MsgInfo, RecordExpired, RecordUpdated, Details);
我经历了这个NHibernate taking a long time to run query，但对我不起作用。
请帮忙！
问候， 温和的
【问题讨论】：
我的最新发现：当我删除 x.PaymentMessageHistoryId.TransactionDate == paymentMessageId.TransactionDate 条件时，它工作正常。表示与数据类型有关。 【参考方案1】：public class OracleDataClientDriver2 : OracleDataClientDriver
protected override void InitializeParameter(IDbDataParameter dbParam, string name, SqlType sqlType)
switch (sqlType.DbType)
//Timestamp columns not indexed by Oracle 11g date columns. - Use Date
case DbType.DateTime:
base.InitializeParameter(dbParam, name, SqlTypeFactory.Date);
break;
default:
base.InitializeParameter(dbParam, name, sqlType);
break;
并更改 connection.driver_class= nameSpace.OracleDataClientDriver2, AssemblyName 的值
【讨论】：
这里是解决方案***.com/questions/7684163/…【参考方案2】：比继承 oracle 驱动程序类更简单的解决方案是在您的属性中添加类型属性，值将是“日期”。这是 NHibernate 类型。
<key-property name="TransactionDate" type="Date" column="TRN_DATE" />
【讨论】：
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