internal object GetScalar(string sqlQuery, CSParameterCollection parameters)
{
long logId = Log(sqlQuery, parameters);
try
{
using (ICSDbCommand dbCommand = CreateCommandInternal(sqlQuery, parameters))
{
using (ICSDbReader reader = dbCommand.ExecuteReader())
{
if (reader.Read())
{
object r = reader[0];
return((r is DBNull) ? null : r);
}
}
}
return(null);
}
catch (Exception ex)
{
throw new CSSQLException("GetScalar exception", ex, sqlQuery, parameters);
}
finally
{
LogEnd(logId);
CSNameGenerator.Reset();
}
}
protected internal override CSSchemaColumn[] GetSchemaColumns(string tableName)
{
using (ICSDbConnection newConn = CreateConnection())
{
ICSDbCommand dbCommand = newConn.CreateCommand();
dbCommand.CommandText = "select * from " + QuoteTable(tableName);
using (var dataReader = (CSSqlReader)dbCommand.ExecuteReader(CSCommandBehavior.SchemaOnly | CSCommandBehavior.KeyInfo))
{
var schemaColumns = new List <CSSchemaColumn>();
DataTable schemaTable = dataReader.Reader.GetSchemaTable();
bool hasHidden = schemaTable.Columns.Contains("IsHidden");
bool hasIdentity = schemaTable.Columns.Contains("IsIdentity");
bool hasAutoincrement = schemaTable.Columns.Contains("IsAutoIncrement");
foreach (DataRow schemaRow in schemaTable.Rows)
{
var schemaColumn = new CSSchemaColumn();
if (hasHidden && !schemaRow.IsNull("IsHidden") && (bool)schemaRow["IsHidden"])
{
schemaColumn.Hidden = true;
}
if (hasIdentity && !schemaRow.IsNull("IsIdentity") && (bool)schemaRow["IsIdentity"])
{
schemaColumn.Identity = true;
}
schemaColumn.IsKey = (bool)schemaRow["IsKey"];
schemaColumn.AllowNull = (bool)schemaRow["AllowDBNull"];
schemaColumn.Name = (string)schemaRow["ColumnName"];
schemaColumn.ReadOnly = (bool)schemaRow["IsReadOnly"];
schemaColumn.DataType = (Type)schemaRow["DataType"];
schemaColumn.Size = (int)schemaRow["ColumnSize"];
if (hasAutoincrement && !schemaRow.IsNull("IsAutoIncrement") && (bool)schemaRow["IsAutoIncrement"])
{
schemaColumn.Identity = true;
}
schemaColumns.Add(schemaColumn);
}
return(schemaColumns.ToArray());
}
}
}
protected internal ICSDbReader CreateReader(string sqlQuery, CSParameterCollection parameters)
{
long logId = Log(sqlQuery, parameters);
try
{
using (ICSDbCommand dbCommand = CreateCommandInternal(sqlQuery, parameters))
return(dbCommand.ExecuteReader());
}
catch (Exception ex)
{
throw new CSSQLException("Error executing query. Possible syntax error", ex, sqlQuery, parameters);
}
finally
{
LogEnd(logId);
CSNameGenerator.Reset();
}
}
