public override void Visit(WMatchPath node)
{
foreach (var sourceEdge in node.PathEdgeList)
{
WSchemaObjectName source = sourceEdge.Item1;
string tableAlias = source.BaseIdentifier.Value;
WEdgeColumnReferenceExpression edge = sourceEdge.Item2;
if (accessedColumns.ContainsKey(tableAlias))
{
switch (edge.EdgeType)
{
case WEdgeType.OutEdge:
accessedColumns[tableAlias].Add(ColumnGraphType.OutAdjacencyList.ToString());
break;
case WEdgeType.InEdge:
accessedColumns[tableAlias].Add(ColumnGraphType.InAdjacencyList.ToString());
break;
case WEdgeType.BothEdge:
accessedColumns[tableAlias].Add(ColumnGraphType.BothAdjacencyList.ToString());
break;
default:
break;
}
}
}
}
public virtual void Visit(WMatchPath node)
{
node.AcceptChildren(this);
}
private static bool ParseMatchPath(
IList<TSqlParserToken> tokens,
ref int nextToken,
ref WMatchPath result,
ref int farestError)
{
var currentToken = nextToken;
var firstToken = nextToken;
var nodeList = new List<Tuple<WSchemaObjectName, WEdgeColumnReferenceExpression>>();
Tuple<WSchemaObjectName, WEdgeColumnReferenceExpression> tuple = null;
while (ParseMatchPathPart(tokens, ref currentToken, ref tuple, ref farestError))
{
if (nodeList.Count > 0)
{
var preTuple = nodeList.Last();
if (preTuple.Item2.Alias == null)
{
preTuple.Item2.Alias = String.Format(CultureInfo.CurrentCulture, "{0}_{1}_{2}",
preTuple.Item1.BaseIdentifier.Value,
preTuple.Item2.MultiPartIdentifier.Identifiers.Last().Value,
tuple.Item1.BaseIdentifier.Value);
preTuple.Item2.AliasRole = AliasType.Default;
}
}
nodeList.Add(tuple);
}
if (nodeList.Count == 0)
return false;
WSchemaObjectName tail = null;
if (!ParseSchemaObjectName(tokens, ref currentToken, ref tail, ref farestError))
return false;
var lastTuple = nodeList.Last();
if (lastTuple.Item2.Alias == null)
{
lastTuple.Item2.Alias = String.Format(CultureInfo.CurrentCulture, "{0}_{1}_{2}", lastTuple.Item1.BaseIdentifier.Value,
lastTuple.Item2.MultiPartIdentifier.Identifiers.Last().Value, tail.BaseIdentifier.Value);
lastTuple.Item2.AliasRole = AliasType.Default;
}
result = new WMatchPath
{
PathNodeList = nodeList,
Tail = tail,
FirstTokenIndex = firstToken,
LastTokenIndex = currentToken - 1
};
nextToken = currentToken;
return true;
}
public virtual void Visit(WMatchPath node)
{
node.AcceptChildren(this);
}
private static bool ParseMatchPath(
IList<TSqlParserToken> tokens,
ref int nextToken,
ref WMatchPath result,
ref int farestError)
{
var currentToken = nextToken;
var firstToken = nextToken;
var nodeList = new List<Tuple<WSchemaObjectName, WEdgeColumnReferenceExpression>>();
Tuple<WSchemaObjectName, WEdgeColumnReferenceExpression> tuple = null;
while (ParseMatchPathPart(tokens, ref currentToken, ref tuple, ref farestError))
{
nodeList.Add(tuple);
}
if (nodeList.Count == 0)
return false;
WSchemaObjectName tail = null;
if (!ParseSchemaObjectName(tokens, ref currentToken, ref tail, ref farestError))
return false;
result = new WMatchPath
{
PathEdgeList = nodeList,
Tail = tail,
FirstTokenIndex = firstToken,
LastTokenIndex = currentToken - 1
};
nextToken = currentToken;
return true;
}