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Optimize single table read performance

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This commit is contained in:
2881099
2022-06-01 14:21:53 +08:00
parent 7290109734
commit 105947c2ed
9 changed files with 139 additions and 219 deletions
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14
FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs
View File

@ -174,6 +174,20 @@ namespace FreeSql.Internal.CommonProvider
return exp;
}
public static MethodInfo _MethodDataReaderIsDBNull = typeof(DbDataReader).GetMethod("IsDBNull", new Type[] { typeof(int) });
public static Dictionary<Type, MethodInfo> _dicMethodDataReaderGetValue = new Dictionary<Type, MethodInfo>
{
[typeof(bool)] = typeof(DbDataReader).GetMethod("GetBoolean", new Type[] { typeof(int) }),
[typeof(int)] = typeof(DbDataReader).GetMethod("GetInt32", new Type[] { typeof(int) }),
[typeof(long)] = typeof(DbDataReader).GetMethod("GetInt64", new Type[] { typeof(int) }),
[typeof(double)] = typeof(DbDataReader).GetMethod("GetDouble", new Type[] { typeof(int) }),
[typeof(float)] = typeof(DbDataReader).GetMethod("GetFloat", new Type[] { typeof(int) }),
[typeof(decimal)] = typeof(DbDataReader).GetMethod("GetDecimal", new Type[] { typeof(int) }),
[typeof(DateTime)] = typeof(DbDataReader).GetMethod("GetDateTime", new Type[] { typeof(int) }),
[typeof(string)] = typeof(DbDataReader).GetMethod("GetString", new Type[] { typeof(int) }),
//[typeof(Guid)] = typeof(DbDataReader).GetMethod("GetGuid", new Type[] { typeof(int) }) 有些驱动不兼容
};
public static MethodInfo MethodStringContains = typeof(string).GetMethod("Contains", new[] { typeof(string) });
public static MethodInfo MethodStringStartsWith = typeof(string).GetMethod("StartsWith", new[] { typeof(string) });
public static MethodInfo MethodStringEndsWith = typeof(string).GetMethod("EndsWith", new[] { typeof(string) });

12
FreeSql/Internal/CommonProvider/SelectProvider/Select0ProviderReader.cs
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@ -748,18 +748,6 @@ namespace FreeSql.Internal.CommonProvider
};
});
}
static MethodInfo _MethodDataReaderIsDBNull = typeof(DbDataReader).GetMethod("IsDBNull", new Type[] { typeof(int) });
static Dictionary<Type, MethodInfo> _dicMethodDataReaderGetValue = new Dictionary<Type, MethodInfo>
{
[typeof(bool)] = typeof(DbDataReader).GetMethod("GetBoolean", new Type[] { typeof(int) }),
[typeof(int)] = typeof(DbDataReader).GetMethod("GetInt32", new Type[] { typeof(int) }),
[typeof(long)] = typeof(DbDataReader).GetMethod("GetInt64", new Type[] { typeof(int) }),
[typeof(double)] = typeof(DbDataReader).GetMethod("GetDouble", new Type[] { typeof(int) }),
[typeof(float)] = typeof(DbDataReader).GetMethod("GetFloat", new Type[] { typeof(int) }),
[typeof(decimal)] = typeof(DbDataReader).GetMethod("GetDecimal", new Type[] { typeof(int) }),
[typeof(DateTime)] = typeof(DbDataReader).GetMethod("GetDateTime", new Type[] { typeof(int) }),
[typeof(string)] = typeof(DbDataReader).GetMethod("GetString", new Type[] { typeof(int) }),
};
protected double InternalAvg(Expression exp)
{