protected IResultColumns ResultColumnsFromSQL(string sql, IDbConnection cn)
{
MyMetaPluginContext context = new MyMetaPluginContext(null, null);
DataTable metaData = context.CreateResultColumnsDataTable();
Plugin.PluginResultColumns resultCols = new Plugin.PluginResultColumns(null);
resultCols.dbRoot = dbRoot;
IDbCommand command = cn.CreateCommand();
command.CommandText = sql;
command.CommandType = CommandType.Text;
using (IDataReader reader = command.ExecuteReader())
{
DataTable schema;
//DataTable data;
string dataType, fieldname;
int length;
// Skip columns contains the index of any columns that we cannot handle, array types and such ...
Hashtable skipColumns = null;
reader.Read();
schema = reader.GetSchemaTable();
IProviderType provType = null;
int columnOrdinal = 0, numericPrecision = 0, numericScale = 0, providerTypeInt = -1, colID = 0;
bool isLong = false;
string dbTypeName = string.Empty, dbTypeNameComplete = string.Empty;
foreach (DataRow row in schema.Rows)
{
DataRow metarow = metaData.NewRow();
fieldname = row["ColumnName"].ToString();
dataType = row["DataType"].ToString();
length = 0;
provType = null;
columnOrdinal = 0;
numericPrecision = 0;
numericScale = 0;
providerTypeInt = -1;
isLong = false;
if (row["ColumnSize"] != DBNull.Value)
{
length = Convert.ToInt32(row["ColumnSize"]);
}
if (row["ColumnOrdinal"] != DBNull.Value)
{
columnOrdinal = Convert.ToInt32(row["ColumnOrdinal"]);
}
if (row["NumericPrecision"] != DBNull.Value)
{
numericPrecision = Convert.ToInt32(row["NumericPrecision"]);
}
if (row["NumericScale"] != DBNull.Value)
{
numericScale = Convert.ToInt32(row["NumericScale"]);
}
if (row["IsLong"] != DBNull.Value)
{
isLong = Convert.ToBoolean(row["IsLong"]);
}
if (row["ProviderType"] != DBNull.Value)
{
providerTypeInt = Convert.ToInt32(row["ProviderType"]);
}
OleDbType oledbType;
try { oledbType = (OleDbType)providerTypeInt; }
catch { oledbType = OleDbType.IUnknown; }
this.GetNativeType(oledbType, providerTypeInt, dataType, length, numericPrecision, numericScale, isLong, out dbTypeName, out dbTypeNameComplete);
metarow["COLUMN_NAME"] = fieldname;
metarow["ORDINAL_POSITION"] = columnOrdinal;
metarow["DATA_TYPE"] = providerTypeInt;
metarow["TYPE_NAME"] = dbTypeName;
metarow["TYPE_NAME_COMPLETE"] = dbTypeNameComplete;
metaData.Rows.Add(metarow);
}
resultCols.Populate(metaData);
}
return(resultCols);
}
protected IResultColumns ResultColumnsFromSQL(string sql, IDbConnection cn)
{
MyMetaPluginContext context = new MyMetaPluginContext(null, null);
DataTable metaData = context.CreateResultColumnsDataTable();
Plugin.PluginResultColumns resultCols = new Plugin.PluginResultColumns(null);
resultCols.dbRoot = dbRoot;
IDbCommand command = cn.CreateCommand();
command.CommandText = sql;
command.CommandType = CommandType.Text;
using (IDataReader reader = command.ExecuteReader())
{
DataTable schema;
//DataTable data;
string dataType, fieldname;
int length;
// Skip columns contains the index of any columns that we cannot handle, array types and such ...
Hashtable skipColumns = null;
reader.Read();
schema = reader.GetSchemaTable();
IProviderType provType = null;
int columnOrdinal = 0, numericPrecision = 0, numericScale = 0, providerTypeInt = -1, colID = 0;
bool isLong = false;
string dbTypeName = string.Empty, dbTypeNameComplete = string.Empty;
foreach (DataRow row in schema.Rows)
{
DataRow metarow = metaData.NewRow();
fieldname = row["ColumnName"].ToString();
dataType = row["DataType"].ToString();
length = 0;
provType = null;
columnOrdinal = 0;
numericPrecision = 0;
numericScale = 0;
providerTypeInt = -1;
isLong = false;
if (row["ColumnSize"] != DBNull.Value) length = Convert.ToInt32(row["ColumnSize"]);
if (row["ColumnOrdinal"] != DBNull.Value) columnOrdinal = Convert.ToInt32(row["ColumnOrdinal"]);
if (row["NumericPrecision"] != DBNull.Value) numericPrecision = Convert.ToInt32(row["NumericPrecision"]);
if (row["NumericScale"] != DBNull.Value) numericScale = Convert.ToInt32(row["NumericScale"]);
if (row["IsLong"] != DBNull.Value) isLong = Convert.ToBoolean(row["IsLong"]);
if (row["ProviderType"] != DBNull.Value) providerTypeInt = Convert.ToInt32(row["ProviderType"]);
OleDbType oledbType;
try { oledbType = (OleDbType)providerTypeInt; }
catch { oledbType = OleDbType.IUnknown; }
this.GetNativeType(oledbType, providerTypeInt, dataType, length, numericPrecision, numericScale, isLong, out dbTypeName, out dbTypeNameComplete);
metarow["COLUMN_NAME"] = fieldname;
metarow["ORDINAL_POSITION"] = columnOrdinal;
metarow["DATA_TYPE"] = providerTypeInt;
metarow["TYPE_NAME"] = dbTypeName;
metarow["TYPE_NAME_COMPLETE"] = dbTypeNameComplete;
metaData.Rows.Add(metarow);
}
resultCols.Populate(metaData);
}
return resultCols;
}