/// <summary>
/// 初始化Sql查询字段类
/// </summary>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="aliasesName">字段别名</param>
private SqlQueryField(String tableName, SqlAggregateFunction function, String columnName, String aliasesName)
{
this._tableName = tableName;
this._fieldName = columnName;
this._aliasesName = aliasesName;
this._useFunction = true;
this._function = function.ToString().ToUpperInvariant();
}
/// <summary>
/// 初始化Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="aliasesName">字段别名</param>
private SqlQueryField(SelectCommand cmd, String tableName, SqlAggregateFunction function, String columnName, String aliasesName)
{
this._tableName = tableName;
this._columnName = columnName;
this._aliasesName = aliasesName;
this._useFunction = true;
this._function = function.ToString().ToUpperInvariant();
}
/// <summary>
/// 初始化Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="aliasesName">字段别名</param>
private SqlQueryField(SelectCommand cmd, String tableName, SqlAggregateFunction function, String columnName, Boolean useDistinct, String aliasesName)
{
this._tableName = tableName;
this._columnName = columnName;
this._aliasesName = aliasesName;
this._useFunction = true;
this._useDistinct = useDistinct;
this._function = function.ToString().ToUpperInvariant();
}
/// <summary>
/// 初始化新的Sql语句排序类
/// </summary>
/// <param name="baseCommand">选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="orderType">排序方式</param>
private SqlOrder(SelectCommand baseCommand, String tableName, SqlAggregateFunction function, String columnName, Boolean useDistinct, SqlOrderType orderType)
{
this._tableName = tableName;
this._columnName = columnName;
this._orderType = orderType;
this._useFunction = true;
this._useDistinct = useDistinct;
this._function = function.ToString().ToUpperInvariant();
}
/// <summary>
/// 创建新的Sql条件语句
/// </summary>
/// <param name="function">合计函数类型</param>
/// <param name="op">条件运算符</param>
/// <param name="value">数据</param>
/// <returns>Sql条件语句</returns>
public static SqlBasicParameterCondition Create(SqlAggregateFunction function, SqlOperator op, Object value)
{
return(SqlCondition.Create(function, "*", op, value));
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, Boolean useDistinct, String aliasesName)
{
return new SqlQueryField(cmd, String.Empty, function, "*", useDistinct, aliasesName);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, String columnName, String aliasesName)
{
return new SqlQueryField(cmd, String.Empty, function, columnName, false, aliasesName);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="useDistinct">是否保证记录唯一</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, String columnName, Boolean useDistinct)
{
return(new SqlQueryField(cmd, String.Empty, function, columnName, useDistinct, String.Empty));
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="function">合计函数</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SqlAggregateFunction function)
{
return(new SqlQueryField(String.Empty, function, "*", String.Empty));
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(String tableName, SqlAggregateFunction function, String columnName, String aliasesName)
{
return(new SqlQueryField(tableName, function, columnName, aliasesName));
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, SqlOrderType orderType)
{
return new SqlOrder(cmd, String.Empty, function, "*", false, orderType);
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, String columnName, Boolean useDistinct, SqlOrderType orderType)
{
return new SqlOrder(cmd, String.Empty, function, columnName, useDistinct, orderType);
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, String tableName, SqlAggregateFunction function, Boolean useDistinct, SqlOrderType orderType)
{
return new SqlOrder(cmd, tableName, function, "*", useDistinct, orderType);
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, String tableName, SqlAggregateFunction function, String columnName, SqlOrderType orderType)
{
return new SqlOrder(cmd, tableName, function, columnName, false, orderType);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function)
{
return(new SqlQueryField(cmd, String.Empty, function, "*", false, String.Empty));
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, Boolean useDistinct, String aliasesName)
{
return(new SqlQueryField(cmd, String.Empty, function, "*", useDistinct, aliasesName));
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, String tableName, SqlAggregateFunction function, String columnName, Boolean useDistinct, String aliasesName)
{
return(new SqlQueryField(cmd, tableName, function, columnName, useDistinct, aliasesName));
}
/// <summary>
/// 初始化新的Sql语句排序类
/// </summary>
/// <param name="baseCommand">选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="orderType">排序方式</param>
private SqlOrder(SelectCommand baseCommand, String tableName, SqlAggregateFunction function, String columnName, Boolean useDistinct, SqlOrderType orderType)
{
this._tableName = tableName;
this._columnName = columnName;
this._orderType = orderType;
this._useFunction = true;
this._useDistinct = useDistinct;
this._function = function.ToString().ToUpperInvariant();
}
/// <summary>
/// 查询指定合计函数并返回当前语句
/// </summary>
/// <param name="function">合计函数类型</param>
/// <returns>当前语句</returns>
public SelectCommand Query(SqlAggregateFunction function)
{
this._queryFields.Add(SqlQueryField.InternalCreateFromAggregateFunction(function));
return(this);
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, String tableName, SqlAggregateFunction function, String columnName, SqlOrderType orderType)
{
return(new SqlOrder(cmd, tableName, function, columnName, false, orderType));
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SqlAggregateFunction function, String columnName)
{
return(new SqlQueryField(String.Empty, function, columnName, String.Empty));
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, String columnName, Boolean useDistinct, SqlOrderType orderType)
{
return(new SqlOrder(cmd, String.Empty, function, columnName, useDistinct, orderType));
}
/// <summary>
/// 查询指定合计函数并返回当前语句
/// </summary>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数类型</param>
/// <param name="fieldName">要查询的字段名</param>
/// <returns>当前语句</returns>
public SelectCommand Query(String tableName, SqlAggregateFunction function, String fieldName)
{
this._queryFields.Add(SqlQueryField.InternalCreateFromAggregateFunction(tableName, function, fieldName));
return this;
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, String columnName, String aliasesName)
{
return(new SqlQueryField(cmd, String.Empty, function, columnName, false, aliasesName));
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, String tableName, SqlAggregateFunction function, Boolean useDistinct, SqlOrderType orderType)
{
return(new SqlOrder(cmd, tableName, function, "*", useDistinct, orderType));
}
/// <summary>
/// 查询指定合计函数并返回当前语句
/// </summary>
/// <param name="function">合计函数类型</param>
/// <returns>当前语句</returns>
public SelectCommand Query(SqlAggregateFunction function)
{
this._queryFields.Add(SqlQueryField.InternalCreateFromAggregateFunction(function));
return this;
}
/// <summary>
/// 创建新的Sql语句排序类
/// </summary>
/// <param name="cmd">选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="orderType">排序方式</param>
internal static SqlOrder InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, SqlOrderType orderType)
{
return(new SqlOrder(cmd, String.Empty, function, "*", false, orderType));
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(String tableName, SqlAggregateFunction function, String columnName, String aliasesName)
{
return new SqlQueryField(tableName, function, columnName, aliasesName);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="useDistinct">是否保证记录唯一</param>
/// <param name="aliasesName">字段别名</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, String tableName, SqlAggregateFunction function, String columnName, Boolean useDistinct, String aliasesName)
{
return new SqlQueryField(cmd, tableName, function, columnName, useDistinct, aliasesName);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SqlAggregateFunction function, String columnName)
{
return new SqlQueryField(String.Empty, function, columnName, String.Empty);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
/// <param name="columnName">字段名称</param>
/// <param name="useDistinct">是否保证记录唯一</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function, String columnName, Boolean useDistinct)
{
return new SqlQueryField(cmd, String.Empty, function, columnName, useDistinct, String.Empty);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="function">合计函数</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SqlAggregateFunction function)
{
return new SqlQueryField(String.Empty, function, "*", String.Empty);
}
/// <summary>
/// 创建新的Sql查询字段类
/// </summary>
/// <param name="cmd">源选择语句</param>
/// <param name="function">合计函数</param>
internal static SqlQueryField InternalCreateFromAggregateFunction(SelectCommand cmd, SqlAggregateFunction function)
{
return new SqlQueryField(cmd, String.Empty, function, "*", false, String.Empty);
}
/// <summary>
/// 查询指定字段名并返回当前语句
/// </summary>
/// <typeparam name="T">实体类类型</typeparam>
/// <param name="cmd">查询语句</param>
/// <param name="expr">实体类属性</param>
/// <param name="function">合计函数类型</param>
/// <param name="aliasesName">字段名的别名</param>
/// <exception cref="ExpressionInvalidException">表达式不正确</exception>
/// <exception cref="NullAttributeException">没有设置特性</exception>
/// <returns>当前语句</returns>
/// <example>
/// <code lang="C#">
/// <![CDATA[
/// public class UserRepository : DatabaseTable<User>
/// {
/// //other necessary code
///
/// public Int32 Count()
/// {
/// return this.Select()
/// .Query<User>(c => c.UserID, SqlAggregateFunction.Count, "UserCount")
/// .Result<Int32>();
///
/// //SELECT COUNT(UserID) AS UserCount From tbl_Users
/// }
/// }
/// ]]>
/// </code>
/// </example>
public static SelectCommand Query <T>(this SelectCommand cmd, Expression <Func <T, Object> > expr, SqlAggregateFunction function, String aliasesName)
{
DatabaseColumnAttribute attr = SelectCommandExtension.GetColumnAttribute(cmd, expr.Body);
return(cmd.Query(function, attr.ColumnName, aliasesName));
}
/// <summary>
/// 创建新的Sql条件语句
/// </summary>
/// <param name="function">合计函数类型</param>
/// <param name="fieldName">要查询的字段名</param>
/// <param name="op">条件运算符</param>
/// <param name="value">数据</param>
/// <returns>Sql条件语句</returns>
public static SqlBasicParameterCondition Create(SqlAggregateFunction function, String fieldName, SqlOperator op, Object value)
{
return(new SqlBasicParameterCondition(SqlParameter.Create(String.Format("{0}({1})", function.ToString().ToUpperInvariant(), fieldName), value), op));
}
/// <summary>
/// 查询指定合计函数并返回当前语句
/// </summary>
/// <param name="tableName">表格名称</param>
/// <param name="function">合计函数类型</param>
/// <param name="fieldName">要查询的字段名</param>
/// <returns>当前语句</returns>
public SelectCommand Query(String tableName, SqlAggregateFunction function, String fieldName)
{
this._queryFields.Add(SqlQueryField.InternalCreateFromAggregateFunction(tableName, function, fieldName));
return(this);
}