438 lines
13 KiB
C#
438 lines
13 KiB
C#
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/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using ASC.Common.Data.Sql.Expressions;
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namespace ASC.Common.Data.Sql
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{
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[DebuggerTypeProxy(typeof(SqlDebugView))]
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public class SqlQuery : ISqlInstruction
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{
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private readonly List<ISqlInstruction> columns = new List<ISqlInstruction>();
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private readonly ArrayList groups = new ArrayList();
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private readonly List<JoinInfo> joins = new List<JoinInfo>();
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private readonly List<ISqlInstruction> tables = new List<ISqlInstruction>();
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private readonly List<UnionInfo> unions = new List<UnionInfo>();
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private bool distinct;
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private int firstResult;
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private Exp having;
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private int maxResults;
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protected IDictionary<object, bool> orders = new Dictionary<object, bool>();
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private bool selectAll;
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protected Exp where;
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private bool forupdate;
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private string index;
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public SqlQuery()
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{
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}
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public SqlQuery(string table)
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{
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From(table);
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}
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#region ISqlInstruction Members
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public string ToString(ISqlDialect dialect)
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{
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var sql = new StringBuilder();
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sql.Append("select ");
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if (distinct) sql.Append("distinct ");
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if (selectAll)
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{
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sql.Append("*");
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}
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else
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{
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columns.ForEach(column => sql.AppendFormat("{0}, ", column.ToString(dialect)));
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sql.Remove(sql.Length - 2, 2);
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}
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if (0 < tables.Count)
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{
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sql.Append(" from ");
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tables.ForEach(table => sql.AppendFormat("{0}, ", table.ToString(dialect)));
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sql.Remove(sql.Length - 2, 2);
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}
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if (!string.IsNullOrEmpty(index))
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{
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sql.AppendFormat(" {0}", dialect.UseIndex(index));
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}
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if (0 < joins.Count)
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{
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foreach (JoinInfo join in joins)
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{
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if (join.JoinType == SqlJoin.Inner) sql.Append(" inner join ");
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if (join.JoinType == SqlJoin.LeftOuter) sql.Append(" left outer join ");
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if (join.JoinType == SqlJoin.RightOuter) sql.Append(" right outer join ");
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sql.AppendFormat("{0} on {1}", join.With.ToString(dialect), join.On.ToString(dialect));
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}
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}
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if (where != Exp.Empty) sql.AppendFormat(" where {0}", where.ToString(dialect));
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if (0 < groups.Count)
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{
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sql.Append(" group by ");
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foreach (object group in groups)
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{
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sql.AppendFormat("{0}, ", group.ToString());
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}
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sql.Remove(sql.Length - 2, 2);
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}
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if (having != Exp.Empty) sql.AppendFormat(" having {0}", having.ToString(dialect));
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if (0 < orders.Count)
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{
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sql.Append(" order by ");
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foreach (var order in orders)
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{
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sql.Append(order.Key.ToString());
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sql.AppendFormat(" {0}, ", order.Value ? "asc" : "desc");
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}
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sql.Remove(sql.Length - 2, 2);
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}
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if (0 < maxResults)
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{
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sql.AppendFormat(" limit {0}", maxResults);
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if (0 < firstResult) sql.AppendFormat(" offset {0}", firstResult);
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}
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if (forupdate)
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{
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sql.Append(" for update");
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}
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unions.ForEach(u => sql.AppendFormat(" union {0}{1}", u.UnionAll ? "all " : string.Empty, u.Query.ToString(dialect)));
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return sql.ToString();
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}
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public object[] GetParameters()
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{
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var parameters = new List<object>();
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columns.ForEach(column => parameters.AddRange(column.GetParameters()));
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tables.ForEach(table => parameters.AddRange(table.GetParameters()));
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foreach (JoinInfo join in joins)
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{
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parameters.AddRange(join.With.GetParameters());
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parameters.AddRange(join.On.GetParameters());
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}
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if (where != Exp.Empty) parameters.AddRange(where.GetParameters());
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if (having != Exp.Empty) parameters.AddRange(having.GetParameters());
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unions.ForEach(u => parameters.AddRange(u.Query.GetParameters()));
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return parameters.ToArray();
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}
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#endregion
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public SqlQuery From(params string[] tables)
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{
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Array.ForEach(tables, table => this.tables.Add((SqlIdentifier)table));
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return this;
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}
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public SqlQuery From(SqlQuery subQuery)
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{
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return From(subQuery, null);
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}
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public SqlQuery From(SqlQuery subQuery, string alias)
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{
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tables.Add(new AsExp(subQuery, alias));
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return this;
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}
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public SqlQuery UseIndex(string index)
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{
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this.index = index;
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return this;
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}
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private SqlQuery Join(SqlJoin join, ISqlInstruction instruction, Exp on)
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{
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joins.Add(new JoinInfo(join, instruction, on));
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return this;
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}
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public SqlQuery InnerJoin(string table, Exp on)
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{
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return Join(SqlJoin.Inner, new SqlIdentifier(table), on);
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}
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public SqlQuery LeftOuterJoin(string table, Exp on)
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{
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return Join(SqlJoin.LeftOuter, new SqlIdentifier(table), on);
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}
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public SqlQuery RightOuterJoin(string table, Exp on)
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{
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return Join(SqlJoin.RightOuter, new SqlIdentifier(table), on);
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}
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public SqlQuery InnerJoin(SqlQuery subQuery, Exp on)
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{
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return InnerJoin(subQuery, string.Empty, on);
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}
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public SqlQuery LeftOuterJoin(SqlQuery subQuery, Exp on)
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{
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return LeftOuterJoin(subQuery, string.Empty, on);
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}
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public SqlQuery RightOuterJoin(SqlQuery subQuery, Exp on)
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{
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return RightOuterJoin(subQuery, string.Empty, on);
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}
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public SqlQuery InnerJoin(SqlQuery subQuery, string alias, Exp on)
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{
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return Join(SqlJoin.Inner, new AsExp(subQuery, alias), on);
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}
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public SqlQuery LeftOuterJoin(SqlQuery subQuery, string alias, Exp on)
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{
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return Join(SqlJoin.LeftOuter, new AsExp(subQuery, alias), on);
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}
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public SqlQuery RightOuterJoin(SqlQuery subQuery, string alias, Exp on)
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{
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return Join(SqlJoin.RightOuter, new AsExp(subQuery, alias), on);
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}
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public SqlQuery Select(string column)
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{
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columns.Add((SqlIdentifier)column);
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return this;
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}
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public SqlQuery Select(params string[] columns)
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{
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this.columns.AddRange(columns.Select(r => (SqlIdentifier) r));
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return this;
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}
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public SqlQuery Select(SqlQuery subQuery, string alias = null)
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{
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columns.Add(new AsExp(subQuery, alias));
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return this;
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}
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public SqlQuery Select(ISqlInstruction instraction)
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{
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columns.Add(instraction);
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return this;
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}
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public SqlQuery SelectAll()
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{
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selectAll = true;
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return this;
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}
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public SqlQuery SelectCount()
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{
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selectAll = false;
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columns.Add(new SelectAgregate(AgregateType.count));
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return this;
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}
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public SqlQuery SelectCount(string column)
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{
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selectAll = false;
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columns.Add(new SelectAgregate(AgregateType.count, column));
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return this;
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}
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public SqlQuery SelectMin(string column)
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{
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selectAll = false;
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columns.Add(new SelectAgregate(AgregateType.min, column));
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return this;
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}
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public SqlQuery SelectMax(string column)
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{
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selectAll = false;
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columns.Add(new SelectAgregate(AgregateType.max, column));
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return this;
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}
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public SqlQuery SelectAvg(string column)
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{
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selectAll = false;
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columns.Add(new SelectAgregate(AgregateType.avg, column));
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return this;
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}
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public SqlQuery SelectSum(string column)
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{
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selectAll = false;
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columns.Add(new SelectAgregate(AgregateType.sum, column));
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return this;
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}
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public SqlQuery Distinct()
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{
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distinct = true;
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return this;
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}
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public SqlQuery Where(Exp exp)
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{
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where = where & exp;
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return this;
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}
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public SqlQuery Where(string sql)
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{
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return Where(new SqlExp(sql));
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}
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public SqlQuery Where(string column, object value)
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{
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return Where(new EqExp(column, value));
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}
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public SqlQuery OrderBy(string column, bool asc)
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{
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orders.Add(column, asc);
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return this;
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}
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public SqlQuery OrderBy(int positin, bool asc)
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{
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orders.Add(positin, asc);
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return this;
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}
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public SqlQuery GroupBy(params string[] columns)
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{
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groups.AddRange(columns);
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return this;
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}
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public SqlQuery GroupBy(params int[] positins)
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{
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groups.AddRange(positins);
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return this;
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}
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public SqlQuery Having(Exp having)
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{
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this.having = having;
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return this;
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}
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public SqlQuery SetFirstResult(int firstResult)
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{
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this.firstResult = firstResult;
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return this;
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}
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public SqlQuery SetMaxResults(int maxResults)
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{
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this.maxResults = maxResults;
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return this;
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}
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public SqlQuery Union(params SqlQuery[] queries)
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{
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foreach (var q in queries)
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{
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unions.Add(new UnionInfo(q, false));
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}
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return this;
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}
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public SqlQuery UnionAll(params SqlQuery[] queries)
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{
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foreach (var q in queries)
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{
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unions.Add(new UnionInfo(q, true));
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}
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return this;
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}
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public SqlQuery ForUpdate(bool forupdate)
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{
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this.forupdate = forupdate;
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return this;
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}
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public override string ToString()
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{
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return ToString(SqlDialect.Default);
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}
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private class JoinInfo
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{
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public readonly SqlJoin JoinType;
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public readonly Exp On;
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public readonly ISqlInstruction With;
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public JoinInfo(SqlJoin joinType, ISqlInstruction with, Exp on)
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{
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With = with;
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JoinType = joinType;
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|
|
On = on;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private enum SqlJoin
|
||
|
|
{
|
||
|
|
LeftOuter,
|
||
|
|
RightOuter,
|
||
|
|
Inner
|
||
|
|
}
|
||
|
|
|
||
|
|
private class UnionInfo
|
||
|
|
{
|
||
|
|
public readonly SqlQuery Query;
|
||
|
|
public readonly bool UnionAll;
|
||
|
|
|
||
|
|
public UnionInfo(SqlQuery query, bool unionAll)
|
||
|
|
{
|
||
|
|
Query = query;
|
||
|
|
UnionAll = unionAll;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|