public void AddDimensionLevelTest()
{
Dimension target = new Dimension();
Dimension d = new Dimension();
target.AddDimensionLevel(d);
Assert.AreEqual(d, target.GetCoarserDimensionLevel()[0]);
}
public void AddDimensionLevelTest1()
{
Dimension target = new Dimension();
List <Dimension> l = new List <Dimension>()
{
new Dimension()
};
target.AddDimensionLevel(l);
Assert.AreEqual(l[0], target.GetCoarserDimensionLevel()[0]);
}
/// <summary>
/// This takes a tablename (most likely "FACT") and loads all foreign keys, which should point to a dimension (Table + column).
/// It creates a List of Dimensions and adds a dimension for each row the Database returns. It then goes on recursively
/// and grabs the Table + Column of the "next" Table, meaning the one you end up at, if you roll up the cube.
/// Note that in this piece of code a dimension may have MULTIPLE sub-ListOfDimensions, which should not exist in the model,
/// but IF they do, it's not a problem at this point (but rather a GUI-problem)
/// </summary>
/// <param name="tablename">The Name of the Table whose ListOfDimensions are to be found.</param>
/// <returns>A list of ListOfDimensions which, most likely, contain even more ListOfDimensions themselves.</returns>
/// <author>Jannik Arndt, Bernd Nottbeck</author>
public List <Dimension> GetDimensionsOf(String tablename)
{
DataTable referencedTables;
DataTable dimensionContentDataTable;
List <Dimension> resultingListOfDimensions = new List <Dimension>();
try
{
Open();
// every table row is a dimension
referencedTables = GetReferencingDataTable(tablename);
foreach (DataRow referencedTableRow in referencedTables.Rows)
{
// create a dimension-object (see MetaWorker.Dimension)
Dimension newDimension = new Dimension(referencedTableRow["FromColumn"].ToString(), referencedTableRow["FromConstraint"].ToString(),
referencedTableRow["FromTable"].ToString(), referencedTableRow["FromColumn"].ToString(),
referencedTableRow["ToConstraint"].ToString(), referencedTableRow["ToTable"].ToString(), referencedTableRow["ToColumn"].ToString());
// Load the content of this table
dimensionContentDataTable = GetTableContent(referencedTableRow["ToTable"].ToString());
// create DimensionContent-Objects and add them to the current dimension
foreach (DataRow dimensionContentRow in dimensionContentDataTable.Rows)
{
string description = "";
if (dimensionContentRow.ItemArray.Count() > 2)
{
description = dimensionContentRow[2].ToString();
}
newDimension.DimensionContentsList.Add(new DimensionContent(dimensionContentRow[0].ToString(), dimensionContentRow[1].ToString(), description));
}
// save the DimensionColumnNames for generated DB-querys
newDimension.DimensionColumnNames = new DimensionColumnNames(dimensionContentDataTable.Columns[0].ColumnName,
dimensionContentDataTable.Columns[1].ColumnName, dimensionContentDataTable.Columns[2].ColumnName);
dimensionContentDataTable.Reset();
// now recursively find all sub-ListOfDimensions of this Table and add them to the current dimension
newDimension.AddDimensionLevel(GetDimensionsOf(referencedTableRow["ToTable"].ToString()));
// add the current dimension to the list that will be returned eventually
resultingListOfDimensions.Add(newDimension);
}
return(resultingListOfDimensions);
}
finally
{
Close();
}
}
public void GetLevelTest()
{
Dimension target = new Dimension();
Dimension d1 = new Dimension();
Dimension d2 = new Dimension();
d1.AddDimensionLevel(d2);
target.AddDimensionLevel(d1);
List <Dimension> actual = target.GetLevel();
Assert.AreEqual(actual.Count, 3);
}
public List <Dimension> GetDimensionsOf(string tablename)
{
// the tempTable is used to store the Database-results
DataTable tempTable = new DataTable();
DataTable tempTable2 = new DataTable();
// this list will be filled and returned
List <Dimension> dimensions = new List <Dimension>();
try
{
Open();
// see http://swp.offis.uni-oldenburg.de:8082/display/MPMDoku/Metadaten-Repository for sql-explanation
MySqlCommand getMetaDataSQL = new MySqlCommand(
"SELECT constraint_name as FromConstraint, table_name as FromTable, column_name as FromColumn, constraint_name as ToConstraint, " +
"referenced_table_name as ToTable, referenced_column_name as ToColumn " +
"FROM information_schema.key_column_usage " +
"WHERE constraint_schema = '" + DBWorker.getParams().Database + "' AND constraint_name != 'PRIMARY' AND table_name = '" + tablename + "' AND referenced_table_name != 'CASE';", Connection);
MySqlDataAdapter metaDataAdapter = new MySqlDataAdapter(getMetaDataSQL);
// Fill the temporally used Table
metaDataAdapter.Fill(tempTable);
// every Database-row is a dimension
foreach (DataRow row in tempTable.Rows)
{
// create a dimension-object (see MetaWorker.Dimension)
Dimension d = new Dimension(row["FromColumn"].ToString(), row["FromConstraint"].ToString(),
row["FromTable"].ToString(), row["FromColumn"].ToString(),
row["ToConstraint"].ToString(), row["ToTable"].ToString(), row["ToColumn"].ToString());
// Now get the Data than can be filtered later:
MySqlCommand getContentSQL = new MySqlCommand("SELECT * FROM `" + row["ToTable"].ToString() + "` LIMIT 100", Connection);
/*
* This SQL-Command seems pretty unsafe, why so? Well, Oracle lets you use parameters for the WHERE-part of the query,
* however you can't do the same thing for the FROM-part. God knows why.
*/
MySqlDataAdapter contentAdapter = new MySqlDataAdapter(getContentSQL);
// Fill the temporally used Table
contentAdapter.Fill(tempTable2);
// create DimensionContent-Objects and add them to the current dimension
foreach (DataRow row2 in tempTable2.Rows)
{
string desc = "";
if (row2.ItemArray.Count() > 2)
{
desc = row2[2].ToString();
}
d.DimensionContentsList.Add(new DimensionContent(row2[0].ToString(), row2[1].ToString(), desc));
}
// save the DimensionColumnNames for generated DB-querys
d.DimensionColumnNames = new DimensionColumnNames(tempTable2.Columns[0].ColumnName,
tempTable2.Columns[1].ColumnName, tempTable2.Columns[2].ColumnName);
tempTable2.Reset();
// now recursively find all sub-ListOfDimensions of this Table and add them to the current dimension
d.AddDimensionLevel(GetDimensionsOf(row["ToTable"].ToString()));
// add the current dimension to the list that will be returned eventually
dimensions.Add(d);
}
return(dimensions);
}
finally
{
Close();
}
}
public List<Dimension> GetDimensionsOf(string tablename)
{
// the tempTable is used to store the Database-results
DataTable tempTable = new DataTable();
DataTable tempTable2 = new DataTable();
// this list will be filled and returned
List<Dimension> dimensions = new List<Dimension>();
try
{
Open();
// see http://swp.offis.uni-oldenburg.de:8082/display/MPMDoku/Metadaten-Repository for sql-explanation
MySqlCommand getMetaDataSQL = new MySqlCommand(
"SELECT constraint_name as FromConstraint, table_name as FromTable, column_name as FromColumn, constraint_name as ToConstraint, " +
"referenced_table_name as ToTable, referenced_column_name as ToColumn " +
"FROM information_schema.key_column_usage " +
"WHERE constraint_schema = '" + DBWorker.getParams().Database + "' AND constraint_name != 'PRIMARY' AND table_name = '" + tablename + "' AND referenced_table_name != 'CASE';", Connection);
MySqlDataAdapter metaDataAdapter = new MySqlDataAdapter(getMetaDataSQL);
// Fill the temporally used Table
metaDataAdapter.Fill(tempTable);
// every Database-row is a dimension
foreach (DataRow row in tempTable.Rows)
{
// create a dimension-object (see MetaWorker.Dimension)
Dimension d = new Dimension(row["FromColumn"].ToString(), row["FromConstraint"].ToString(),
row["FromTable"].ToString(), row["FromColumn"].ToString(),
row["ToConstraint"].ToString(), row["ToTable"].ToString(), row["ToColumn"].ToString());
// Now get the Data than can be filtered later:
MySqlCommand getContentSQL = new MySqlCommand("SELECT * FROM `" + row["ToTable"].ToString() + "` LIMIT 100", Connection);
/*
* This SQL-Command seems pretty unsafe, why so? Well, Oracle lets you use parameters for the WHERE-part of the query,
* however you can't do the same thing for the FROM-part. God knows why.
*/
MySqlDataAdapter contentAdapter = new MySqlDataAdapter(getContentSQL);
// Fill the temporally used Table
contentAdapter.Fill(tempTable2);
// create DimensionContent-Objects and add them to the current dimension
foreach (DataRow row2 in tempTable2.Rows)
{
string desc = "";
if (row2.ItemArray.Count() > 2)
desc = row2[2].ToString();
d.DimensionContentsList.Add(new DimensionContent(row2[0].ToString(), row2[1].ToString(), desc));
}
// save the DimensionColumnNames for generated DB-querys
d.DimensionColumnNames = new DimensionColumnNames(tempTable2.Columns[0].ColumnName,
tempTable2.Columns[1].ColumnName, tempTable2.Columns[2].ColumnName);
tempTable2.Reset();
// now recursively find all sub-ListOfDimensions of this Table and add them to the current dimension
d.AddDimensionLevel(GetDimensionsOf(row["ToTable"].ToString()));
// add the current dimension to the list that will be returned eventually
dimensions.Add(d);
}
return dimensions;
}
finally
{
Close();
}
}
