public QueryExpression(DataTable target, string expression, QueryLevel level)
{
this.Target = target;
this.Expression = expression;
this.Definition = SqlDefinition.Create(this.Expression);
this.Level = level;
}
private static bool _IsEmpty(SqlDefinition def)
{
return(def.Top.Length == 0 &&
def.SelectFields.Length == 0 &&
def.Condition.IsEmpty() &&
def.Order.Length == 0);
}
private static string GetFromSqlByDerived(DataTable table, QueryLevel level, SqlDefinition exp)
{
var inheritedRoot = table.InheritedRoot;
StringBuilder sql = new StringBuilder();
sql.AppendFormat(" {0}{1}", SqlStatement.Qualifier(inheritedRoot.Name), GetLockCode(level)); //inheritedRoot记录了条目信息，所以一定会参与查询
foreach (var derived in table.Deriveds)
{
if (!exp.ContainsExceptId(derived))
{
continue;
}
if (table.Type == DataTableType.AggregateRoot)
{
sql.AppendFormat(" inner join {0} on {1}.Id={0}.Id",
SqlStatement.Qualifier(derived.Name), SqlStatement.Qualifier(inheritedRoot.Name));
}
else
{
sql.AppendFormat(" inner join {0} on {1}.Id={0}.Id and {1}.{2}={0}.{2}",
SqlStatement.Qualifier(derived.Name)
, SqlStatement.Qualifier(inheritedRoot.Name)
, SqlStatement.Qualifier(table.Root.TableIdName));
}
}
return(sql.ToString());
}
private static bool ContainsTable(DataTable root, SqlDefinition exp, DataTable target)
{
if (target.IsMultiple)
{
return(false); //多表关联的，不连带查询
}
var tip = target.MemberPropertyTip;
if (exp.SpecifiedField)
{
//指定了加载字段，那么就看表是否提供了相关的字段
var path = target.GetChainCode(root);
return(exp.ContainsChain(path));
}
else
{
if (target.Type == DataTableType.AggregateRoot || tip.Lazy)
{
var path = target.GetChainCode(root);
if (!exp.ContainsChain(path))
{
return(false); //默认情况下外部的内聚根、懒惰加载不连带查询
}
}
return(true);
}
}
public QueryExpression(DataTable target, string expression, QueryLevel level)
: base(target.ObjectType)
{
this.Target = target;
this.Expression = expression;
this.Definition = SqlDefinition.Create(this.Expression, target.IsEnabledMultiTenancy);
this.Level = level;
}
/// <summary>
/// 获取派生类table的完整代码，该代码可获取整个派生类的信息
/// </summary>
/// <param name="table"></param>
/// <param name="level"></param>
/// <returns></returns>
//private static string GetDerivedTableSql(DataTable table, QueryLevel level)
//{
// var inheritedRoot = table.InheritedRoot;
// StringBuilder sql = new StringBuilder();
// sql.Append("select ");
// sql.AppendLine(GetSelectFieldsSql(table, SqlDefinition.All));
// sql.AppendFormat(" from {0}{1}", inheritedRoot.Name, GetLockCode(level));
// FillJoinSql(inheritedRoot, inheritedRoot, SqlDefinition.All, sql);
// foreach (var derived in table.Deriveds)
// {
// if (table.Type == DataTableType.AggregateRoot)
// {
// sql.AppendFormat(" inner join {0} on {1}.Id={0}.Id",
// derived.Name, inheritedRoot.Name);
// }
// else
// {
// sql.AppendFormat(" inner join {0} on {1}.Id={0}.Id and {1}.{2}={0}.{2}",
// derived.Name, inheritedRoot.Name, table.Root.TableIdName);
// }
// FillJoinSql(derived, derived, SqlDefinition.All, sql);
// }
// return sql.ToString();
//}
private static bool ContainsField(string fieldName, SqlDefinition exp)
{
if (exp.SpecifiedField)
{
return(exp.ContainsField(fieldName));
}
return(true);
}
private static SqlColumns GetColumns(SqlDefinition define)
{
var mockSql = string.Format("select {0} from tempTable {1} {2}",
define.GetFieldsSql(),
define.Condition.IsEmpty() ? string.Empty : string.Format("where {0}", define.Condition.Code),
define.Order);
return(SqlParser.Parse(mockSql));
}
private static string GetFromSql(DataTable chainRoot, QueryLevel level, SqlDefinition exp)
{
if (chainRoot.IsDerived)
{
return(GetFromSqlByDerived(chainRoot, level, exp));
//return string.Format(" ({0}) as {1}", GetDerivedTableSql(chainRoot, level, string.Empty), chainRoot.Name);
}
else
{
return(string.Format(" {0}{1}", SqlStatement.Qualifier(chainRoot.Name), GetLockCode(level)));
}
}
private static string GetJoinSql(DataTable chainRoot, SqlDefinition exp)
{
StringBuilder sql = new StringBuilder();
using (var temp = TempIndex.Borrow())
{
var index = temp.Item;
FillJoinSql(chainRoot, chainRoot, exp, sql, index);
}
return(sql.ToString());
}
/// <summary>
/// 获取表<paramref name="chainRoot"/>需要查询的select字段
/// </summary>
/// <param name="chainRoot"></param>
/// <param name="exp"></param>
/// <param name="chain">可以为输出的字段前置对象链</param>
/// <returns></returns>
private static string GetSelectFieldsSql(DataTable chainRoot, SqlDefinition exp)
{
StringBuilder sql = new StringBuilder();
sql.Append(GetChainRootSelectFieldsSql(chainRoot, exp).Trim());
using (var temp = TempIndex.Borrow())
{
var index = temp.Item;
sql.Append(GetSlaveSelectFieldsSql(chainRoot, chainRoot, exp, index).Trim());
}
sql.Length--;//移除最后一个逗号
return(sql.ToString());
}
private static void FillJoinSql(DataTable chainRoot, DataTable master, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
if (master.IsDerived)
{
var inheritedRoot = master.InheritedRoot;
FillChildJoinSql(chainRoot, inheritedRoot, exp, sql, index);
foreach (var derived in master.Deriveds)
{
FillChildJoinSql(chainRoot, derived, exp, sql, index);
}
}
else
{
FillChildJoinSql(chainRoot, chainRoot, exp, sql, index);
}
}
/// <summary>
/// 填充查询链中根表的select的字段
/// </summary>
/// <param name="chainRoot"></param>
/// <param name="exp"></param>
/// <param name="sql"></param>
private static string GetChainRootSelectFieldsSql(DataTable chainRoot, SqlDefinition exp)
{
StringBuilder sql = new StringBuilder();
if (chainRoot.IsDerived)
{
FillChainRootSelectFieldsSql(chainRoot.InheritedRoot, TableType.InheritedRoot, exp, sql);
foreach (var derived in chainRoot.Deriveds)
{
FillChainRootSelectFieldsSql(derived, TableType.Derived, exp, sql);
}
}
else
{
FillChainRootSelectFieldsSql(chainRoot, TableType.Common, exp, sql);
}
return(sql.ToString());
}
/// <summary>
///
/// </summary>
/// <param name="chainRoot">是查询的根表</param>
/// <param name="master"></param>
/// <param name="exp"></param>
/// <param name="masterProxyName"></param>
/// <param name="sql"></param>
private static void FillChildJoinSql(DataTable chainRoot, DataTable master, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
var masterChain = master.GetChainCode(chainRoot);
foreach (var child in master.BuildtimeChilds)
{
if (!index.TryAdd(child))
{
continue; //防止由于循环引用导致的死循环
}
if (child.IsDerived)
{
FillJoinSqlByDerived(chainRoot, master, child, masterChain, exp, sql, index);
}
else
{
FillJoinSqlByNoDerived(chainRoot, master, child, masterChain, exp, sql, index);
}
}
}
private static void FillFieldsSql(DataTable chainRoot, DataTable master, DataTable current, TableType tableType, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
if (!ContainsTable(chainRoot, exp, current))
{
return;
}
var chain = current.GetChainCode(chainRoot);
sql.AppendLine();
foreach (var field in current.Fields)
{
if (field.Tip.Lazy)
{
continue;
}
if (tableType == TableType.Derived)
{
if (field.Name == EntityObject.IdPropertyName || field.Name == current.Root.TableIdName)
{
continue;
}
}
var fieldName = string.Format("{0}_{1}", chain, field.Name);
if (!ContainsField(fieldName, exp))
{
continue;
}
sql.AppendFormat("{0}.{1} as {2},", SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(field.Name),
SqlStatement.Qualifier(fieldName));
}
FillChildSelectFieldsSql(chainRoot, current, exp, sql, index);
}
private static void FillJoinSqlByNoDerived(DataTable chainRoot, DataTable master, DataTable current, string masterChain, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
if (!ContainsTable(chainRoot, exp, current))
{
return;
}
var tip = current.MemberPropertyTip;
var chain = current.GetChainCode(chainRoot);
sql.AppendLine();
string masterTableName = string.IsNullOrEmpty(masterChain) ? master.Name : masterChain;
sql.AppendFormat(" left join {0} as {1} on {2}.{3}Id={1}.Id",
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(masterTableName),
tip.PropertyName);
FillChildJoinSql(chainRoot, current, exp, sql, index);
}
private static void FillChainRootSelectFieldsSql(DataTable current, TableType tableType, SqlDefinition exp, StringBuilder sql)
{
sql.AppendLine();
foreach (var field in current.Fields)
{
if (field.IsAdditional)
{
continue; //不输出附加字段，有这类需求请自行编码sql语句，因为附加字段的定制化需求统一由数据映射器处理
}
if (field.Tip.Lazy && !exp.SpecifiedField(field.Name))
{
continue;
}
if (tableType == TableType.Derived)
{
//派生表不输出主键信息
if (field.Name == EntityObject.IdPropertyName)
{
continue;
}
if (current.Type != DataTableType.AggregateRoot)
{
if (field.Name == GeneratedField.RootIdName)
{
continue;
}
}
}
if (!ContainsField(field.Name, exp))
{
continue;
}
sql.AppendFormat("{0}.{1} as {1},", SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(field.Name));
}
}
private static void FillJoinSqlByNoDerived(DataTable chainRoot, DataTable master, DataTable current, string masterChain, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
if (!ContainsTable(chainRoot, exp, current))
{
return;
}
var chain = current.GetChainCode(chainRoot);
string masterTableName = string.IsNullOrEmpty(masterChain) ? master.Name : masterChain;
string currentTenantSql = current.IsEnabledMultiTenancy ? string.Format("and {0}.{1}=@{2}", SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(GeneratedField.TenantIdName),
GeneratedField.TenantIdName) : string.Empty;
sql.AppendLine();
if (current.IsMultiple)
{
var middle = current.Middle;
var masterIdName = middle.Root == middle.Master ? GeneratedField.RootIdName : GeneratedField.MasterIdName;
string middleTenantSql = middle.IsEnabledMultiTenancy ? string.Format("and {0}.{1}=@{2}", SqlStatement.Qualifier(middle.Name),
SqlStatement.Qualifier(GeneratedField.TenantIdName),
GeneratedField.TenantIdName) : string.Empty;
if (current.Type == DataTableType.AggregateRoot)
{
sql.AppendFormat(" left join {0}{6} on {0}.{1}={2}.Id {7} left join {3} as {4}{6} on {0}.{5}={4}.Id {8}",
SqlStatement.Qualifier(middle.Name),
SqlStatement.Qualifier(masterIdName),
SqlStatement.Qualifier(masterTableName),
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
GeneratedField.SlaveIdName,
GetLockCode(QueryLevel.None),
middleTenantSql,
currentTenantSql);
}
else
{
//中间的查询会多一个{4}.{6}={2}.Id的限定，
sql.AppendFormat(" left join {0}{7} on {0}.{1}={2}.Id {8} left join {3} as {4}{7} on {0}.{5}={4}.Id and {4}.{6}={2}.Id {9}",
SqlStatement.Qualifier(middle.Name),
SqlStatement.Qualifier(masterIdName),
SqlStatement.Qualifier(masterTableName),
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
GeneratedField.SlaveIdName,
GeneratedField.RootIdName,
GetLockCode(QueryLevel.None),
middleTenantSql,
currentTenantSql);
}
}
else
{
if (current.Type == DataTableType.AggregateRoot)
{
var tip = current.MemberPropertyTip;
sql.AppendFormat(" left join {0} as {1}{4} on {2}.{3}Id={1}.Id {5}",
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(masterTableName),
tip.PropertyName,
GetLockCode(QueryLevel.None),
currentTenantSql);
}
else
{
if (chainRoot.Type == DataTableType.AggregateRoot)
{
string rootTableName = chainRoot.Name;
var tip = current.MemberPropertyTip;
sql.AppendFormat(" left join {0} as {1}{4} on {2}.{3}Id={1}.Id and {1}.{5}={6}.Id {7}",
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(masterTableName),
tip.PropertyName,
GetLockCode(QueryLevel.None),
GeneratedField.RootIdName,
SqlStatement.Qualifier(rootTableName),
currentTenantSql);
}
else
{
//查询不是从根表发出的，而是从引用表，那么直接用@RootId来限定
var tip = current.MemberPropertyTip;
sql.AppendFormat(" left join {0} as {1}{4} on {2}.{3}Id={1}.Id and {1}.{5}=@{5} {6}",
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(masterTableName),
tip.PropertyName,
GetLockCode(QueryLevel.None),
GeneratedField.RootIdName,
currentTenantSql);
}
}
}
FillChildJoinSql(chainRoot, current, exp, sql, index);
}
private static void FillJoinSqlByNoDerived(DataTable chainRoot, DataTable master, DataTable current, string masterChain, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
if (!ContainsTable(chainRoot, exp, current))
{
return;
}
var chain = current.GetChainCode(chainRoot);
string masterTableName = string.IsNullOrEmpty(masterChain) ? master.Name : masterChain;
sql.AppendLine();
if (current.IsMultiple)
{
var middle = current.Middle;
var masterIdName = middle.Root == middle.Master ? GeneratedField.RootIdName : GeneratedField.MasterIdName;
if (current.Type == DataTableType.AggregateRoot)
{
sql.AppendFormat(" left join {0} on {0}.{1}={2}.Id left join {3} as {4} on {0}.{5}={4}.Id",
SqlStatement.Qualifier(middle.Name),
SqlStatement.Qualifier(masterIdName),
SqlStatement.Qualifier(masterTableName),
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
GeneratedField.SlaveIdName);
}
else
{
//中间的查询会多一个{4}.{6}={2}.Id的限定，
sql.AppendFormat(" left join {0} on {0}.{1}={2}.Id left join {3} as {4} on {0}.{5}={4}.Id and {4}.{6}={2}.Id",
SqlStatement.Qualifier(middle.Name),
SqlStatement.Qualifier(masterIdName),
SqlStatement.Qualifier(masterTableName),
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
GeneratedField.SlaveIdName,
GeneratedField.RootIdName);
}
}
else
{
var tip = current.MemberPropertyTip;
sql.AppendFormat(" left join {0} as {1} on {2}.{3}Id={1}.Id",
SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(masterTableName),
tip.PropertyName);
}
FillChildJoinSql(chainRoot, current, exp, sql, index);
}
/// <summary>
/// 填充查询链中从表的select的字段
/// </summary>
/// <param name="chainRoot"></param>
/// <param name="master"></param>
/// <param name="exp"></param>
/// <param name="sql"></param>
private static string GetSlaveSelectFieldsSql(DataTable chainRoot, DataTable master, SqlDefinition exp, TempIndex index)
{
StringBuilder sql = new StringBuilder();
if (master.IsDerived)
{
FillChildSelectFieldsSql(chainRoot, master.InheritedRoot, exp, sql, index);
foreach (var derived in master.Deriveds)
{
FillChildSelectFieldsSql(chainRoot, derived, exp, sql, index);
}
}
else
{
FillChildSelectFieldsSql(chainRoot, master, exp, sql, index);
}
return(sql.ToString());
}
private static void FillChainRootSelectFieldsSql(DataTable current, TableType tableType, SqlDefinition exp, StringBuilder sql)
{
sql.AppendLine();
foreach (var field in current.Fields)
{
if (field.Tip.Lazy)
{
continue;
}
if (tableType == TableType.Derived)
{
//派生表不输出主键信息
if (field.Name == EntityObject.IdPropertyName)
{
continue;
}
if (current.Type != DataTableType.AggregateRoot)
{
if (field.Name == current.Root.TableIdName)
{
continue;
}
}
}
if (!ContainsField(field.Name, exp))
{
continue;
}
sql.AppendFormat("{0}.{1} as {1},", SqlStatement.Qualifier(current.Name),
SqlStatement.Qualifier(field.Name));
}
}
private static void FillChildSelectFieldsSql(DataTable chainRoot, DataTable master, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
foreach (var child in master.BuildtimeChilds)
{
if (!index.TryAdd(child))
{
continue; //防止由于循环引用导致的死循环
}
if (child.IsDerived)
{
FillFieldsSql(chainRoot, master, child.InheritedRoot, TableType.InheritedRoot, exp, sql, index);
foreach (var derived in child.Deriveds)
{
FillFieldsSql(chainRoot, master, derived, TableType.Derived, exp, sql, index);
}
}
else
{
FillFieldsSql(chainRoot, master, child, TableType.Common, exp, sql, index);
}
}
}
private static void FillFieldsSql(DataTable chainRoot, DataTable master, DataTable current, TableType tableType, SqlDefinition exp, StringBuilder sql, TempIndex index)
{
if (!ContainsTable(chainRoot, exp, current))
{
return;
}
var chain = current.GetChainCode(chainRoot);
sql.AppendLine();
foreach (var field in current.Fields)
{
if (field.IsAdditional)
{
continue; //不输出附加字段，有这类需求请自行编码sql语句，因为附加字段的定制化需求统一由数据映射器处理
}
if (field.Tip.Lazy && !exp.SpecifiedField(field.Name))
{
continue;
}
if (tableType == TableType.Derived)
{
if (field.Name == EntityObject.IdPropertyName || field.Name == GeneratedField.RootIdName)
{
continue;
}
}
var fieldName = string.Format("{0}_{1}", chain, field.Name);
if (!ContainsField(fieldName, exp))
{
continue;
}
sql.AppendFormat("{0}.{1} as {2},", SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(field.Name),
SqlStatement.Qualifier(fieldName));
}
if (current.IsEnabledMultiTenancy)
{
if (tableType != TableType.Derived)
{
var fieldName = string.Format("{0}_{1}", chain, GeneratedField.TenantIdName);
sql.AppendFormat("{0}.{1} as {2},", SqlStatement.Qualifier(chain),
SqlStatement.Qualifier(GeneratedField.TenantIdName),
fieldName);
}
}
FillChildSelectFieldsSql(chainRoot, current, exp, sql, index);
}
