private static ForeignKeyInfo GetForeignKey(SqlConnection con, string senderTable, string sentColumn)
{
var cmdForeignKeyReferences = new SqlCommand
{
CommandText = MyQueries.GetForeignKeyQuery(senderTable, sentColumn),
CommandType = CommandType.Text,
Connection = con
};
var drForeignKeyReferences = cmdForeignKeyReferences.ExecuteReader();
ForeignKeyInfo foreignkey = null;
if (drForeignKeyReferences.Read())
{
foreignkey = new ForeignKeyInfo
{
FkName = drForeignKeyReferences[0].ToString(),
TableName = drForeignKeyReferences[1].ToString(),
ColumnName = drForeignKeyReferences[2].ToString(),
ReferencedTable = drForeignKeyReferences[3].ToString(),
ReferencedColumn = drForeignKeyReferences[4].ToString()
};
}
drForeignKeyReferences.Close();
return(foreignkey);
}
public static Dictionary <string, List <ColumnInformation> > DatabaseSchemaCustomizationGetRequest(string connectionString)
{
var entities = new Dictionary <string, List <ColumnInformation> >();
var tableNames = new List <string>();
var columns = new List <ColumnInformation>();
using (var con = new SqlConnection(connectionString))
{
con.Open();
var cmd = new SqlCommand(MyQueries.AllTenantTablesListQuery, con);
var dr = cmd.ExecuteReader();
while (dr.Read())
{
tableNames.Add(dr[0].ToString());
}
dr.Close();
foreach (var tableName in tableNames)
{
columns.Clear();
SqlCommand cmdTable = new SqlCommand
{
Connection = con,
CommandText = MyQueries.GetTableGeneralSelectQuery(tableName)
};
var da = new SqlDataAdapter(cmdTable);
var dt = new DataTable(tableName);
da.Fill(dt);
columns.AddRange(from DataColumn column in dt.Columns select new ColumnInformation {
Name = column.ColumnName, DataTypeName = column.DataType.Name, AllowDbNull = column.AllowDBNull.ToString()
});
entities.Add(tableName, new List <ColumnInformation>(columns));
}
}
return(entities);
}
private static string CheckManyToOne(string receivedTable, string senderTable, string connectionString, out ForeignKeyInfo foreignKey)
{
using (var con = new SqlConnection(connectionString))
{
con.Open();
var cmdForeignKeyReferences = new SqlCommand
{
CommandText = MyQueries.GetForeignKeyQueryBetweenTablesQuery(senderTable, receivedTable),
CommandType = CommandType.Text,
Connection = con
};
var drForeignKeyReferences = cmdForeignKeyReferences.ExecuteReader();
ForeignKeyInfo foreignkey = null;
if (drForeignKeyReferences.Read())
{
foreignkey = new ForeignKeyInfo
{
FkName = drForeignKeyReferences[0].ToString(),
TableName = drForeignKeyReferences[1].ToString(),
ColumnName = drForeignKeyReferences[2].ToString(),
ReferencedTable = drForeignKeyReferences[3].ToString(),
ReferencedColumn = drForeignKeyReferences[4].ToString()
};
}
drForeignKeyReferences.Close();
var primaryKey = GetPrimaryKey(con, senderTable);
string result;
if (foreignkey != null)
{
result = "manytoone";
if (foreignkey.ColumnName == primaryKey.ColumnName)
{
result = (foreignkey.ColumnName == primaryKey.ColumnName) ? "onetoone" : "manytoone";
}
}
else
{
result = null;
}
foreignKey = foreignkey;
return(result);
}
}
private static List <string> GetColumnList(SqlConnection con, string tableName)
{
var colList = new List <string>();
var cmd = new SqlCommand
{
Connection = con,
CommandText = MyQueries.GetColumnsListQuery(tableName)
};
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
colList.Add(dr[0].ToString());
}
dr.Close();
return(colList);
}
private static string CheckOneToOne(string receivedTable, string senderTable, string connectionString, out ForeignKeyInfo oneToOneforeignkey)
{
using (var con = new SqlConnection(connectionString))
{
con.Open();
var cmdOneToOneRelationship = new SqlCommand
{
CommandText = MyQueries.GetForeignKeyQueryBetweenTablesQuery(receivedTable, senderTable),
CommandType = CommandType.Text,
Connection = con
};
var primaryKey = GetPrimaryKey(con, receivedTable);
var drOneToOneRelationship = cmdOneToOneRelationship.ExecuteReader();
var oneToOneForeignKey = new ForeignKeyInfo();
if (drOneToOneRelationship.Read())
{
oneToOneForeignKey.FkName = drOneToOneRelationship[0].ToString();
oneToOneForeignKey.TableName = drOneToOneRelationship[1].ToString();
oneToOneForeignKey.ColumnName = drOneToOneRelationship[2].ToString();
oneToOneForeignKey.ReferencedTable = drOneToOneRelationship[3].ToString();
oneToOneForeignKey.ReferencedColumn = drOneToOneRelationship[4].ToString();
}
drOneToOneRelationship.Close();
string result;
if (oneToOneForeignKey.ColumnName != null)
{
result = (primaryKey.ColumnName == oneToOneForeignKey.ColumnName) ? "onetoone" : "onetomany";
}
else
{
result = "";
}
oneToOneforeignkey = oneToOneForeignKey;
return(result);
}
}
private static PrimaryKeyInfo GetPrimaryKey(SqlConnection con, string tableName)
{
var cmdPrimaryKeys = new SqlCommand
{
CommandText = MyQueries.GetPrimaryKeyQuery(tableName),
CommandType = CommandType.Text,
Connection = con
};
var drPrimaryKeys = cmdPrimaryKeys.ExecuteReader();
PrimaryKeyInfo primaryKey = new PrimaryKeyInfo();
if (drPrimaryKeys.Read())
{
primaryKey = new PrimaryKeyInfo
{
PkName = drPrimaryKeys[0].ToString(),
TableName = drPrimaryKeys[1].ToString(),
ColumnName = drPrimaryKeys[2].ToString()
};
}
drPrimaryKeys.Close();
return(primaryKey);
}
private static bool CheckManyToMany(string receivedTable, string senderTable, string connectionString, out string matchedTable)
{
var tables = new List <string>();
using (var con = new SqlConnection(connectionString))
{
con.Open();
PrimaryKeyInfo receiverprimaryKeyInfo = GetPrimaryKey(con, receivedTable);
PrimaryKeyInfo senderprimaryKeyInfo = GetPrimaryKey(con, senderTable);
SqlCommand cmd = new SqlCommand
{
Connection = con,
CommandText = MyQueries.ManyToManyTableCheckingQuery(senderTable, receivedTable)
};
var dr = cmd.ExecuteReader();
while (dr.Read())
{
tables.Add(dr[0].ToString());
}
dr.Close();
var otherTableFKs = new Dictionary <string, List <ForeignKeyInfo> >();
foreach (var table in tables)
{
var otherTableForeignKeysCommand = new SqlCommand
{
Connection = con,
CommandText =
MyQueries.OtherTableForeignKeysQuery(table, senderTable, receivedTable, senderprimaryKeyInfo,
receiverprimaryKeyInfo)
};
var drotherTableForeignKeysCommand = otherTableForeignKeysCommand.ExecuteReader();
var otherTableForeignKeyInfos = new List <ForeignKeyInfo>();
while (drotherTableForeignKeysCommand.Read())
{
var fkInfo = new ForeignKeyInfo
{
FkName = drotherTableForeignKeysCommand[0].ToString(),
TableName = drotherTableForeignKeysCommand[1].ToString(),
ColumnName = drotherTableForeignKeysCommand[2].ToString(),
ReferencedTable = drotherTableForeignKeysCommand[3].ToString(),
ReferencedColumn = drotherTableForeignKeysCommand[4].ToString()
};
otherTableForeignKeyInfos.Add(fkInfo);
}
drotherTableForeignKeysCommand.Close();
otherTableFKs.Add(table, otherTableForeignKeyInfos);
}
var primaryKeyInfoForCompareSenderTable = new PrimaryKeyInfoForCompare
{
ColumnName = senderprimaryKeyInfo.ColumnName,
TableName = senderprimaryKeyInfo.TableName
};
var primaryKeyInfoForCompareReceiverTable = new PrimaryKeyInfoForCompare
{
ColumnName = receiverprimaryKeyInfo.ColumnName,
TableName = receiverprimaryKeyInfo.TableName
};
var primaryKeyInfosForCompare = new Dictionary <string, List <PrimaryKeyInfoForCompare> >();
foreach (var otherTableFk in otherTableFKs)
{
var listt = otherTableFk.Value.Select(foreignKey => new PrimaryKeyInfoForCompare
{
ColumnName = foreignKey.ReferencedColumn,
TableName = foreignKey.ReferencedTable
}).ToList();
primaryKeyInfosForCompare.Add(otherTableFk.Key, listt);
}
foreach (var primaryKeyInfoForCompare in from primaryKeyInfoForCompare in primaryKeyInfosForCompare
let infosList = primaryKeyInfoForCompare.Value.ToList()
where
infosList.Any(p => p.ColumnName == primaryKeyInfoForCompareSenderTable.ColumnName &&
p.TableName == primaryKeyInfoForCompareSenderTable.TableName)
where
infosList.Any(s => s.ColumnName == primaryKeyInfoForCompareReceiverTable.ColumnName &&
s.TableName == primaryKeyInfoForCompareReceiverTable.TableName)
select primaryKeyInfoForCompare)
{
matchedTable = primaryKeyInfoForCompare.Key;
return(true);
}
matchedTable = null;
return(false);
}
}
