/// <include file='Doc/en_EN/FbDataReader.xml' path='doc/class[@name="FbDataReader"]/method[@name="GetSchemaTable"]/*'/>
public DataTable GetSchemaTable()
{
this.CheckState();
if (this.schemaTable != null)
{
return(this.schemaTable);
}
DataRow schemaRow;
this.schemaTable = this.GetSchemaTableStructure();
/* Prepare statement for schema fields information */
FbCommand schemaCmd = new FbCommand(
this.GetSchemaCommandText(),
this.command.Connection,
this.command.ActiveTransaction);
schemaCmd.Parameters.Add("@TABLE_NAME", FbDbType.Char, 31);
schemaCmd.Parameters.Add("@COLUMN_NAME", FbDbType.Char, 31);
schemaCmd.Prepare();
schemaTable.BeginLoadData();
for (int i = 0; i < this.fields.Count; i++)
{
bool isKeyColumn = false;
bool isUnique = false;
bool isReadOnly = false;
int precision = 0;
if (!this.fields[i].IsExpression())
{
/* Get Schema data for the field */
schemaCmd.Parameters[0].Value = this.fields[i].Relation;
schemaCmd.Parameters[1].Value = this.fields[i].Name;
FbDataReader r = schemaCmd.ExecuteReader();
if (r.Read())
{
isReadOnly = (this.IsReadOnly(r) || this.fields[i].IsExpression()) ? true : false;
isKeyColumn = (r.GetInt32(2) == 1) ? true : false;
isUnique = (r.GetInt32(3) == 1) ? true : false;
precision = r.IsDBNull(4) ? -1 : r.GetInt32(4);
}
/* Close the Reader */
r.Close();
}
/* Create new row for the Schema Table */
schemaRow = schemaTable.NewRow();
schemaRow["ColumnName"] = this.GetName(i);
schemaRow["ColumnOrdinal"] = i;
schemaRow["ColumnSize"] = this.fields[i].GetSize();
if (fields[i].IsDecimal())
{
schemaRow["NumericPrecision"] = schemaRow["ColumnSize"];
if (precision > 0)
{
schemaRow["NumericPrecision"] = precision;
}
schemaRow["NumericScale"] = this.fields[i].NumericScale * (-1);
}
schemaRow["DataType"] = this.GetFieldType(i);
schemaRow["ProviderType"] = this.GetProviderType(i);
schemaRow["IsLong"] = this.fields[i].IsLong();
schemaRow["AllowDBNull"] = this.fields[i].AllowDBNull();
schemaRow["IsRowVersion"] = false;
schemaRow["IsAutoIncrement"] = false;
schemaRow["IsReadOnly"] = isReadOnly;
schemaRow["IsKey"] = isKeyColumn;
schemaRow["IsUnique"] = isUnique;
schemaRow["IsAliased"] = this.fields[i].IsAliased();
schemaRow["IsExpression"] = this.fields[i].IsExpression();
schemaRow["BaseSchemaName"] = DBNull.Value;
schemaRow["BaseCatalogName"] = DBNull.Value;
schemaRow["BaseTableName"] = this.fields[i].Relation;
schemaRow["BaseColumnName"] = this.fields[i].Name;
schemaTable.Rows.Add(schemaRow);
/* Close statement */
schemaCmd.Close();
}
schemaTable.EndLoadData();
/* Dispose command */
schemaCmd.Dispose();
return(schemaTable);
}
