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- 增加 PostgreSQL 特有功能 On Conflict Do Update 功能；

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28810
2019-11-13 16:21:30 +08:00
parent b43f9b6688
commit e0030b0c00
10 changed files with 492 additions and 35 deletions
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197
Providers/FreeSql.Provider.PostgreSQL/Curd/OnConflictDoUpdate.cs Normal file
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using FreeSql.Aop;
using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace FreeSql.PostgreSQL.Curd
{
public class OnConflictDoUpdate<T1> where T1 : class
{
internal PostgreSQLInsert<T1> _pgsqlInsert;
internal PostgreSQLUpdate<T1> _pgsqlUpdatePriv;
internal PostgreSQLUpdate<T1> _pgsqlUpdate => _pgsqlUpdatePriv ??
(_pgsqlUpdatePriv = new PostgreSQLUpdate<T1>(_pgsqlInsert.InternalOrm, _pgsqlInsert.InternalCommonUtils, _pgsqlInsert.InternalCommonExpression, null) { InternalTableAlias = "EXCLUDED" }
.NoneParameter().SetSource(_pgsqlInsert.InternalSource) as PostgreSQLUpdate<T1>);
ColumnInfo[] _columns;
public OnConflictDoUpdate(IInsert<T1> insert, Expression<Func<T1, object>> columns = null)
{
_pgsqlInsert = insert as PostgreSQLInsert<T1>;
if (_pgsqlInsert == null) throw new Exception("OnConflictDoUpdate 是 FreeSql.Provider.PostgreSQL 特有的功能");
if (columns != null)
{
var colsList = new List<ColumnInfo>();
var cols = _pgsqlInsert.InternalCommonExpression.ExpressionSelectColumns_MemberAccess_New_NewArrayInit(null, columns?.Body, false, null).ToDictionary(a => a, a => true);
foreach (var col in _pgsqlInsert.InternalTable.Columns.Values)
if (cols.ContainsKey(col.Attribute.Name))
colsList.Add(col);
_columns = colsList.ToArray();
}
if (_columns == null || _columns.Any() == false)
_columns = _pgsqlInsert.InternalTable.Primarys;
if (_columns.Any() == false) throw new Exception("OnConflictDoUpdate 功能要求实体类必须设置 IsPrimary 属性");
}
protected void ClearData()
{
_pgsqlInsert.InternalClearData();
_pgsqlUpdatePriv = null;
}
public OnConflictDoUpdate<T1> IgnoreColumns(Expression<Func<T1, object>> columns)
{
_pgsqlUpdate.IgnoreColumns(columns);
return this;
}
public OnConflictDoUpdate<T1> UpdateColumns(Expression<Func<T1, object>> columns)
{
_pgsqlUpdate.UpdateColumns(columns);
return this;
}
public OnConflictDoUpdate<T1> IgnoreColumns(string[] columns)
{
_pgsqlUpdate.IgnoreColumns(columns);
return this;
}
public OnConflictDoUpdate<T1> UpdateColumns(string[] columns)
{
_pgsqlUpdate.UpdateColumns(columns);
return this;
}
public OnConflictDoUpdate<T1> Set<TMember>(Expression<Func<T1, TMember>> column, TMember value)
{
_pgsqlUpdate.Set(column, value);
return this;
}
//由于表达式解析问题，ON CONFLICT("id") DO UPDATE SET 需要指定表别名，如 Set(a => a.Clicks + 1) 解析会失败
//暂时不开放这个功能，如有需要使用 SetRaw("click = t.click + 1") 替代该操作
//public OnConflictDoUpdate<T1> Set<TMember>(Expression<Func<T1, TMember>> exp)
//{
// _pgsqlUpdate.Set(exp);
// return this;
//}
public OnConflictDoUpdate<T1> SetRaw(string sql)
{
_pgsqlUpdate.SetRaw(sql);
return this;
}
public string ToSql()
{
var sb = new StringBuilder();
var insertSql = _pgsqlInsert.ToSql();
sb.Append(insertSql).Insert(insertSql.IndexOf('('), " AS _ftb_ ").Append("\r\nON CONFLICT(");
for (var a = 0; a < _columns.Length; a++)
{
if (a > 0) sb.Append(", ");
sb.Append(_pgsqlInsert.InternalCommonUtils.QuoteSqlName(_columns[a].Attribute.Name));
}
sb.Append(") DO UPDATE SET\r\n");
var sbSetEmpty = _pgsqlUpdate.InternalSbSet.Length == 0;
var sbSetIncrEmpty = _pgsqlUpdate.InternalSbSetIncr.Length == 0;
if (sbSetEmpty == false || sbSetIncrEmpty == false)
{
if (sbSetEmpty == false) sb.Append(_pgsqlUpdate.InternalSbSet.ToString().Substring(2));
if (sbSetIncrEmpty == false) sb.Append(sbSetEmpty ? _pgsqlUpdate.InternalSbSetIncr.ToString().Substring(2) : _pgsqlUpdate.InternalSbSetIncr.ToString());
}
else
{
var colidx = 0;
foreach (var col in _pgsqlInsert.InternalTable.Columns.Values)
{
if (col.Attribute.IsPrimary || _pgsqlUpdate.InternalIgnore.ContainsKey(col.Attribute.Name)) continue;
if (colidx > 0) sb.Append(", \r\n");
if (col.Attribute.IsVersion == true)
{
var field = _pgsqlInsert.InternalCommonUtils.QuoteSqlName(col.Attribute.Name);
sb.Append(field).Append(" = _ftb_.").Append(field).Append(" + 1");
}
else if (_pgsqlInsert.InternalIgnore.ContainsKey(col.Attribute.Name))
{
var caseWhen = _pgsqlUpdate.InternalWhereCaseSource(col.CsName, sqlval => sqlval).Trim();
sb.Append(caseWhen);
if (caseWhen.EndsWith(" END")) _pgsqlUpdate.InternalToSqlCaseWhenEnd(sb, col);
}
else
{
var field = _pgsqlInsert.InternalCommonUtils.QuoteSqlName(col.Attribute.Name);
sb.Append(field).Append(" = EXCLUDED.").Append(field);
}
++colidx;
}
}
return sb.ToString();
}
public long ExecuteAffrows()
{
var sql = this.ToSql();
if (string.IsNullOrEmpty(sql)) return 0;
var before = new CurdBeforeEventArgs(_pgsqlInsert.InternalTable.Type, _pgsqlInsert.InternalTable, CurdType.Insert, sql, _pgsqlInsert.InternalParams);
_pgsqlInsert.InternalOrm.Aop.CurdBefore?.Invoke(_pgsqlInsert, before);
long ret = 0;
Exception exception = null;
try
{
ret = _pgsqlInsert.InternalOrm.Ado.ExecuteNonQuery(_pgsqlInsert.InternalConnection, _pgsqlInsert.InternalTransaction, CommandType.Text, sql, _pgsqlInsert.InternalParams);
}
catch (Exception ex)
{
exception = ex;
throw ex;
}
finally
{
var after = new CurdAfterEventArgs(before, exception, ret);
_pgsqlInsert.InternalOrm.Aop.CurdAfter?.Invoke(_pgsqlInsert, after);
ClearData();
}
return ret;
}
#if net40
#else
async public Task<long> ExecuteAffrowsAsync()
{
var sql = this.ToSql();
if (string.IsNullOrEmpty(sql)) return 0;
var before = new CurdBeforeEventArgs(_pgsqlInsert.InternalTable.Type, _pgsqlInsert.InternalTable, CurdType.Insert, sql, _pgsqlInsert.InternalParams);
_pgsqlInsert.InternalOrm.Aop.CurdBefore?.Invoke(_pgsqlInsert, before);
long ret = 0;
Exception exception = null;
try
{
ret = await _pgsqlInsert.InternalOrm.Ado.ExecuteNonQueryAsync(_pgsqlInsert.InternalConnection, _pgsqlInsert.InternalTransaction, CommandType.Text, sql, _pgsqlInsert.InternalParams);
}
catch (Exception ex)
{
exception = ex;
throw ex;
}
finally
{
var after = new CurdAfterEventArgs(before, exception, ret);
_pgsqlInsert.InternalOrm.Aop.CurdAfter?.Invoke(_pgsqlInsert, after);
ClearData();
}
return ret;
}
#endif
}
}