protected IServerExpressionPlan PrepareRootPlan()
{
if (_rootPlan == null)
{
_rootParams = new Runtime.DataParams();
((DAEDataSet)_link.DataSet).GetAllParams(_rootParams);
_rootPlan = _process.PrepareExpression(GetExpression(_rootExpression), _rootParams);
}
return(_rootPlan);
}
/// <summary>Evaluates the given expression using the given process and returns the result.</summary>
public DAE.Runtime.Data.IDataValue EvaluateRaw(IServerProcess process, string expression, DAE.Runtime.DataParams paramsValue)
{
CheckActive();
if (process == null)
{
process = UtilityProcess;
}
IServerExpressionPlan plan = process.PrepareExpression(expression, paramsValue);
try
{
return(plan.Evaluate(paramsValue));
}
finally
{
process.UnprepareExpression(plan);
}
}
/// <summary>Opens a cursor on the given expression using the given process.</summary>
public IServerCursor OpenCursor(IServerProcess process, string expression, DAE.Runtime.DataParams paramsValue)
{
CheckActive();
if (process == null)
{
process = UtilityProcess;
}
IServerExpressionPlan plan = process.PrepareExpression(expression, paramsValue);
try
{
return(plan.Open(paramsValue));
}
catch
{
process.UnprepareExpression(plan);
throw;
}
}
public DAE.Runtime.Data.Scalar EvaluateScalar(IServerProcess process, string expression, DAE.Runtime.DataParams paramsValue)
{
if (process == null)
{
process = DataSession.UtilityProcess;
}
DAE.IServerExpressionPlan plan = process.PrepareExpression(expression, paramsValue);
try
{
ErrorList errors = new ErrorList();
errors.AddRange(plan.Messages);
ReportErrors(null, errors);
return((DAE.Runtime.Data.Scalar)plan.Evaluate(paramsValue));
}
finally
{
process.UnprepareExpression(plan);
}
}
private void InternalPrepare()
{
if (_plan == null)
{
_plan = _process.PrepareExpression(_expression, _params);
try
{
ErrorsOccurred(_plan.Messages);
if (!(_plan.DataType is Schema.ITableType))
{
throw new ClientException(ClientException.Codes.InvalidResultType, _plan.DataType == null ? "<invalid expression>" : _plan.DataType.Name);
}
_tableVar = _plan.TableVar;
}
catch
{
_plan = null;
throw;
}
}
}