private ExprNode GetFilterExpressionInclOnClause(ExprNode optionalFilterNode, OuterJoinDesc[] outerJoinDescList)
{
if (optionalFilterNode == null)
{ // no need to add as query planning is fully based on on-clause
return(null);
}
if (outerJoinDescList.Length == 0)
{ // not an outer-join syntax
return(optionalFilterNode);
}
if (!OuterJoinDesc.ConsistsOfAllInnerJoins(outerJoinDescList))
{ // all-inner joins
return(optionalFilterNode);
}
var hasOnClauses = OuterJoinDesc.HasOnClauses(outerJoinDescList);
if (!hasOnClauses)
{
return(optionalFilterNode);
}
var expressions = new List <ExprNode>();
expressions.Add(optionalFilterNode);
foreach (var outerJoinDesc in outerJoinDescList)
{
if (outerJoinDesc.OptLeftNode != null)
{
expressions.Add(outerJoinDesc.MakeExprNode(null));
}
}
ExprAndNode andNode = ExprNodeUtility.ConnectExpressionsByLogicalAnd(expressions);
try
{
andNode.Validate(null);
}
catch (ExprValidationException ex)
{
throw new EPRuntimeException("Unexpected exception validating expression: " + ex.Message, ex);
}
return(andNode);
}
private static ExprNode GetFilterExpressionInclOnClause(
ExprNode whereClause,
OuterJoinDesc[] outerJoinDescList,
StatementRawInfo rawInfo,
StatementCompileTimeServices services)
{
if (whereClause == null) { // no need to add as query planning is fully based on on-clause
return null;
}
if (outerJoinDescList.Length == 0) { // not an outer-join syntax
return whereClause;
}
if (!OuterJoinDesc.ConsistsOfAllInnerJoins(outerJoinDescList)) { // all-inner joins
return whereClause;
}
var hasOnClauses = OuterJoinDesc.HasOnClauses(outerJoinDescList);
if (!hasOnClauses) {
return whereClause;
}
IList<ExprNode> expressions = new List<ExprNode>();
expressions.Add(whereClause);
foreach (var outerJoinDesc in outerJoinDescList) {
if (outerJoinDesc.OptLeftNode != null) {
expressions.Add(outerJoinDesc.MakeExprNode(rawInfo, services));
}
}
var andNode = ExprNodeUtilityMake.ConnectExpressionsByLogicalAnd(expressions);
try {
andNode.Validate(null);
}
catch (ExprValidationException ex) {
throw new EPRuntimeException("Unexpected exception validating expression: " + ex.Message, ex);
}
return andNode;
}
