/// <summary>
/// Gets column schema information about an OLE table
/// </summary>
/// <param name="tableName">Name of the table</param>
/// <returns>DataTable with schema information</returns>
public override DataSets.TableColumnSchema.ColumnsDataTable GetTableColumnSchema(string tableName)
{
OleDbConnection conn = this.GetNativeConnection();
try
{
OpenConnection(conn);
DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, new object[] { null, null, tableName, null });
DataSets.TableColumnSchema schema = new Epi.DataSets.TableColumnSchema();
schema.Merge(dt);
return schema.Columns;
}
catch (Exception ex)
{
throw new GeneralException("Could not get table column schema for." + tableName, ex);
}
finally
{
CloseConnection(conn);
}
}
///// <summary>
///// Gets Primary_Keys schema information about a SQL table
///// </summary>
///// <param name="tableName">Name of the table</param>
///// <returns>DataTable with schema information</returns>
//public override DataSets.TableKeysSchema.Primary_KeysDataTable GetTableKeysSchema(string tableName)
//{
// OleDbConnection conn = new OleDbConnection("Provider=SQLOleDb;" + connectionString);
// try
// {
// OpenConnection(conn);
// DataTable t = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Primary_Keys, new object[] { null, null, tableName });
// DataSets.TableKeysSchema schema = new Epi.DataSets.TableKeysSchema();
// schema.Merge(t);
// return schema.Primary_Keys;
// }
// finally
// {
// CloseConnection(conn);
// }
//}
/// <summary>
/// Gets column schema information about an OLE table
/// </summary>
/// <param name="tableName">Name of the table</param>
/// <returns>DataTable with schema information</returns>
public override DataSets.TableColumnSchema.ColumnsDataTable GetTableColumnSchema(string tableName)
{
try
{
DataTable table = this.GetSchema("Columns", tableName);
// IS_NULLABLE and DATA_TYPE are different data types for non OleDb DataTables.
DataSets.TableColumnSchema tableColumnSchema = new Epi.DataSets.TableColumnSchema();
tableColumnSchema.Merge(table, false, MissingSchemaAction.Ignore);
return tableColumnSchema.Columns;
}
catch (Exception ex)
{
throw new GeneralException("Could not get table column schema for " + tableName + ".", ex);
}
}
/// <summary>
/// Gets column schema information about an MySQL table
/// </summary>
/// <param name="tableName">Name of the table</param>
/// <returns>DataTable with schema information</returns>
public override Epi.DataSets.TableColumnSchema.ColumnsDataTable GetTableColumnSchema(string tableName)
{
DataTable table = this.GetSchema("Columns", tableName);
DataTable tableToMerge = table.Copy();
tableToMerge.Rows.Clear();
string isNullableCol = table.Rows[0].ItemArray[6].ToString();
if (isNullableCol.Equals("YES"))
{
}
else
{
tableToMerge.Rows[0].ItemArray[6] = "false";
tableToMerge.Rows[0].ItemArray[6] = Boolean.Parse(tableToMerge.Rows[0].ItemArray[6].ToString());
}
//string datatype = table.Rows[0].ItemArray[7].ToString();
DataSets.TableColumnSchema tableColumnSchema = new Epi.DataSets.TableColumnSchema();
//string dc = tableColumnSchema.Columns.IS_NULLABLEColumn.DataType.FullName;
tableColumnSchema.Merge(tableToMerge);
return tableColumnSchema.Columns;
}
