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225
MarketDataLib/DataAccess/ZacksRankDA.cs
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225
MarketDataLib/DataAccess/ZacksRankDA.cs
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using System;
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using System.Collections.Generic;
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using System.Text;
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using MySql.Data.MySqlClient;
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using MarketData.MarketDataModel;
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using MarketData.Utils;
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namespace MarketData.DataAccess
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{
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public class ZacksRankDA
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{
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private ZacksRankDA()
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{
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}
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// Get the latest rank for symbol that falls on or before the specified date
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public static ZacksRank GetZacksRankOnOrBefore(String symbol, DateTime date)
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{
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MySqlConnection sqlConnection = null;
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MySqlDataReader sqlDataReader = null;
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MySqlCommand sqlCommand=null;
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String strQuery = null;
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try
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{
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DateTime? maxDate=GetMaxDateOnOrBefore(symbol,date);
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if(null==maxDate)return null;
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StringBuilder sb = new StringBuilder();
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sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
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sb.Append("select symbol,zacks_rank,date,type from zacksrank where symbol=");
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sb.Append("'").Append(symbol).Append("'").Append(" ");
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sb.Append("and date=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(maxDate.Value)).Append("'");
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sb.Append(" limit 1").Append(";");
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strQuery = sb.ToString(); ;
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sqlCommand = new MySqlCommand(strQuery, sqlConnection);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlDataReader = sqlCommand.ExecuteReader();
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if (!sqlDataReader.Read()) return null;
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ZacksRank zacksRank=new ZacksRank();
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zacksRank.Symbol=sqlDataReader.GetString(0);
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zacksRank.Rank=sqlDataReader.GetString(1);
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zacksRank.Date=sqlDataReader.GetDateTime(2);
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if(!sqlDataReader.IsDBNull(3))zacksRank.Type=sqlDataReader.GetString(3);
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return zacksRank;
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}
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catch (Exception exception)
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{
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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return null;
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}
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finally
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{
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if(null!=sqlCommand)sqlCommand.Dispose();
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if (null != sqlDataReader) sqlDataReader.Close();
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if (null != sqlConnection) sqlConnection.Close();
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}
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}
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// Get the most recent rank date on or before the given date for specified symbol
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private static DateTime? GetMaxDateOnOrBefore(String symbol, DateTime date)
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{
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MySqlConnection sqlConnection = null;
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MySqlDataReader sqlDataReader = null;
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MySqlCommand sqlCommand=null;
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String strQuery = null;
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DateTime? maxDate=null;
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try
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{
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StringBuilder sb = new StringBuilder();
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sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
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sb.Append("select date from zacksrank where symbol=");
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sb.Append("'").Append(symbol).Append("'").Append(" ");
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sb.Append("and date<=").Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(date)).Append("' ");
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sb.Append(" order by date desc ");
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sb.Append(" limit 1").Append(";");
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strQuery = sb.ToString(); ;
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sqlCommand = new MySqlCommand(strQuery, sqlConnection);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlDataReader = sqlCommand.ExecuteReader();
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if (!sqlDataReader.Read()) return null;
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if(!sqlDataReader.IsDBNull(0))maxDate=sqlDataReader.GetDateTime(0);
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return maxDate;
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}
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catch (Exception exception)
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{
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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return null;
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}
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finally
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{
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if(null!=sqlCommand)sqlCommand.Dispose();
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if (null != sqlDataReader) sqlDataReader.Close();
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if (null != sqlConnection) sqlConnection.Close();
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}
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}
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// Get the latest rank for symbol
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public static ZacksRank GetZacksRank(String symbol)
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{
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MySqlConnection sqlConnection = null;
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MySqlDataReader sqlDataReader = null;
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MySqlCommand sqlCommand=null;
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String strQuery = null;
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try
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{
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StringBuilder sb = new StringBuilder();
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sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
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sb.Append("select date,symbol,zacks_rank,type from zacksrank where symbol=");
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sb.Append("'").Append(symbol).Append("'").Append(" ");
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sb.Append("and date=").Append(" (select max(date) from zacksrank where symbol='").Append(symbol).Append("')");
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strQuery = sb.ToString(); ;
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sqlCommand = new MySqlCommand(strQuery, sqlConnection);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlDataReader = sqlCommand.ExecuteReader();
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if (!sqlDataReader.Read()) return null;
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ZacksRank zacksRank=new ZacksRank();
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zacksRank.Date=sqlDataReader.GetDateTime(0);
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zacksRank.Symbol=sqlDataReader.GetString(1);
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zacksRank.Rank=sqlDataReader.GetString(2);
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if(!sqlDataReader.IsDBNull(3))zacksRank.Type=sqlDataReader.GetString(3);
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return zacksRank;
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}
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catch (Exception exception)
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{
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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return null;
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}
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finally
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{
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if(null!=sqlCommand)sqlCommand.Dispose();
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if (null != sqlDataReader) sqlDataReader.Close();
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if (null != sqlConnection) sqlConnection.Close();
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}
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}
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// Insert a rank if the latest rank that we have is different from the one to be added or we do not have a rank
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public static bool InsertZacksRank(ZacksRank zacksRank)
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{
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MySqlConnection sqlConnection = null;
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MySqlTransaction sqlTransaction = null;
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MySqlCommand sqlCommand=null;
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String strQuery = null;
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try
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{
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if(null==zacksRank||null==zacksRank.Symbol||null==zacksRank.Rank||"".Equals(zacksRank.Rank))return false;
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ZacksRank latestRank=GetZacksRank(zacksRank.Symbol);
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if(null!=latestRank&&latestRank.Rank.Equals(zacksRank.Rank))return true;
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zacksRank.Type=GetChangeType(latestRank,zacksRank);
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sqlConnection = SqlUtils.CreateMySqlConnection(MainDataSource.Instance.LocateDataSource("market_data"));
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sqlTransaction = sqlConnection.BeginTransaction(System.Data.IsolationLevel.ReadCommitted);
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DeleteZacksRank(zacksRank, sqlConnection, sqlTransaction);
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sqlTransaction.Commit();
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sqlTransaction = sqlConnection.BeginTransaction();
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StringBuilder sb = new StringBuilder();
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sb.Append("insert into zacksrank (symbol,date,zacks_rank,type) ");
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sb.Append("values(");
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sb.Append("'").Append(zacksRank.Symbol).Append("'").Append(",");
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sb.Append("'").Append(Utility.DateTimeToStringYYYYHMMHDD(zacksRank.Date)).Append("'").Append(",");
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sb.Append("'").Append(zacksRank.Rank).Append("'").Append(",");
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if(null==zacksRank.Type)sb.Append("null");
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else sb.Append("'").Append(zacksRank.Type).Append("'");
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sb.Append(")");
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strQuery = sb.ToString();
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sqlCommand = new MySqlCommand(strQuery, sqlConnection, sqlTransaction);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlCommand.ExecuteNonQuery();
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sqlTransaction.Commit();
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return true;
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}
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catch (Exception exception)
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{
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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MDTrace.WriteLine(LogLevel.DEBUG,"Query was '" + strQuery + "'");
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return false;
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}
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finally
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{
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if(null!=sqlCommand)sqlCommand.Dispose();
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if(null!=sqlTransaction)sqlTransaction.Dispose();
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if (null != sqlConnection) sqlConnection.Close();
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}
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}
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private static String GetChangeType(ZacksRank latestRank,ZacksRank newRank)
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{
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if(null==latestRank)return "Initial";
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if(null==latestRank.Rank||null==newRank||null==newRank.Rank)return null;
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int latestRankNumber=int.Parse(latestRank.Rank.Substring(0,1));
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int newRankNumber=int.Parse(newRank.Rank.Substring(0,1));
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if(newRankNumber>latestRankNumber)return "Downgrades";
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else if(newRankNumber<latestRankNumber)return "Upgrades";
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return "NoChange";
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}
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// Delete a ranking on symbol and date
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private static bool DeleteZacksRank(ZacksRank zacksRank,MySqlConnection sqlConnection,MySqlTransaction sqlTransaction)
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{
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StringBuilder sb = new StringBuilder();
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String strQuery = null;
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try
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{
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if(null==zacksRank||null==zacksRank.Symbol||null==zacksRank.Rank||"".Equals(zacksRank.Rank))return false;
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sb.Append("delete from zacksrank where ");
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sb.Append("symbol='").Append(zacksRank.Symbol).Append("'");
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sb.Append(" and ");
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sb.Append("date='").Append(Utility.DateTimeToStringYYYYHMMHDD(zacksRank.Date)).Append("'");
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strQuery = sb.ToString();
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MySqlCommand sqlCommand = new MySqlCommand(strQuery, sqlConnection, sqlTransaction);
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sqlCommand.CommandTimeout = SqlUtils.COMMAND_TIMEOUT;
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sqlCommand.ExecuteNonQuery();
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sqlCommand.Dispose();
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return true;
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}
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catch (Exception exception)
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{
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sqlTransaction.Rollback();
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MDTrace.WriteLine(LogLevel.DEBUG,exception);
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if (null != strQuery) MDTrace.WriteLine(LogLevel.DEBUG,"Query was " + strQuery);
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return false;
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}
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finally
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{
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}
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}
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}
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}
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