/// <summary>
/// convert statements in annotation to according graph data modification statements
/// </summary>
/// <param name="script">SQL script</param>
/// <param name="annotations">stores information of data modification statements</param>
/// <returns>Converted script</returns>
private void ConvertToGraphModificationStatement(IList <WSqlStatement> statements)
{
for (var j = 0; j < statements.Count; ++j)
{
var stmt = statements[j];
if (_nodeCount >= _annotations.Count)
{
break;
}
if (stmt is WSelectQueryBlock && stmt.FirstTokenIndex == _annotations[_nodeCount].Position)
{
var newStmt = stmt as WSelectQueryBlock;
var annotation = _annotations[_nodeCount] as DeleteEdgeAnnotation;
if (annotation != null)
{
newStmt.MatchClause = new WMatchClause
{
Paths = new List <WMatchPath>
{
annotation.Path
}
}
}
;
statements[j] = new WDeleteEdgeSpecification(newStmt);
_nodeCount++;
}
if (!(stmt is WInsertSpecification) &&
!(stmt is WDeleteSpecification))
{
continue;
}
if (stmt.LastTokenIndex < _annotations[_nodeCount].Position)
{
continue;
}
if (_annotations[_nodeCount] is InsertNodeAnnotation)
{
statements[j] = new WInsertNodeSpecification(stmt as WInsertSpecification);
}
else if (_annotations[_nodeCount] is InsertEdgeAnnotation)
{
var annotation = _annotations[_nodeCount] as InsertEdgeAnnotation;
statements[j] = new WInsertEdgeSpecification(stmt as WInsertSpecification)
{
EdgeColumn = new WColumnReferenceExpression
{
MultiPartIdentifier = new WMultiPartIdentifier(annotation.EdgeColumn)
},
};
}
else if (_annotations[_nodeCount] is DeleteNodeAnnotation)
{
statements[j] = new WDeleteNodeSpecification(stmt as WDeleteSpecification);
}
_nodeCount++;
}
}
}
public virtual void Visit(WInsertNodeSpecification node)
{
node.AcceptChildren(this);
}
public virtual void Visit(WInsertNodeSpecification node)
{
node.AcceptChildren(this);
}
/// <summary>
/// convert statements in annotation to according graph data modification statements
/// </summary>
/// <param name="script">SQL script</param>
/// <param name="annotations">stores information of data modification statements</param>
/// <returns>Converted script</returns>
private void ConvertToGraphModificationStatement(IList<WSqlStatement> statements)
{
for (var j = 0; j < statements.Count; ++j)
{
var stmt = statements[j];
if (_nodeCount >= _annotations.Count)
break;
if (stmt is WSelectStatement && stmt.FirstTokenIndex == _annotations[_nodeCount].Position)
{
var newStmt = (stmt as WSelectStatement).QueryExpr as WSelectQueryBlock;
var annotation = _annotations[_nodeCount] as DeleteEdgeAnnotation;
if (annotation != null)
newStmt.MatchClause = new WMatchClause
{
Paths = new List<WMatchPath>
{
annotation.Path
}
};
statements[j] = new WDeleteEdgeSpecification(newStmt);
_nodeCount++;
}
if (!(stmt is WInsertSpecification) &&
!(stmt is WDeleteSpecification))
continue;
if (stmt.LastTokenIndex < _annotations[_nodeCount].Position)
{
continue;
}
if (_annotations[_nodeCount] is InsertNodeAnnotation)
{
statements[j] = new WInsertNodeSpecification(stmt as WInsertSpecification);
}
else if (_annotations[_nodeCount] is InsertEdgeAnnotation)
{
var annotation = _annotations[_nodeCount] as InsertEdgeAnnotation;
statements[j] = new WInsertEdgeSpecification(stmt as WInsertSpecification)
{
EdgeColumn = new WColumnReferenceExpression
{
MultiPartIdentifier = new WMultiPartIdentifier(annotation.EdgeColumn)
},
};
}
else if (_annotations[_nodeCount] is DeleteNodeAnnotation)
{
statements[j] = new WDeleteNodeSpecification(stmt as WDeleteSpecification);
}
_nodeCount++;
}
}