internal void DropProperties(GremlinVariable belongToVariable, List <string> PropertyKeys)
{
List <object> properties = new List <object>();
foreach (var propertyKey in PropertyKeys)
{
properties.Add(propertyKey);
properties.Add(null);
}
if (PropertyKeys.Count == 0)
{
properties.Add(GremlinKeyword.Star);
properties.Add(null);
}
GremlinUpdatePropertiesVariable dropVariable = null;
switch (belongToVariable.GetVariableType())
{
case GremlinVariableType.Vertex:
dropVariable = new GremlinUpdateVertexPropertiesVariable(belongToVariable, properties);
break;
case GremlinVariableType.Edge:
dropVariable = new GremlinUpdateEdgePropertiesVariable(belongToVariable, properties);
break;
}
VariableList.Add(dropVariable);
TableReferences.Add(dropVariable);
SetPivotVariable(dropVariable);
}
public DmlUpdateStatement(bool lowPriority,
bool ignore,
TableReferences tableRefs,
IList <Pair <Identifier, IExpression> > values,
IExpression where, OrderBy orderBy,
Limit limit)
{
IsLowPriority = lowPriority;
IsIgnore = ignore;
if (tableRefs == null)
{
throw new ArgumentException("argument tableRefs is null for update stmt");
}
TableRefs = tableRefs;
if (values == null || values.Count <= 0)
{
Values = new List <Pair <Identifier, IExpression> >(0);
}
else
{
if (!(values is List <Pair <Identifier, IExpression> >))
{
Values = new List <Pair <Identifier, IExpression> >(values);
}
else
{
Values = values;
}
}
Where = where;
OrderBy = orderBy;
Limit = limit;
}
internal void Reset()
{
GremlinVariable inputVariable = null;
if (VariableList.First() is GremlinContextVariable)
{
inputVariable = VariableList.First();
}
ParentContext = null;
PivotVariable = null;
VariableList.Clear();
ProjectedProperties.Clear();
TableReferences.Clear();
MatchPathList.Clear();
Predicates = null;
StepList.Clear();
ContextLocalPath = null;
//TODO: reserve the InputVariable, used for repeat step, should be refactored later
if (inputVariable != null)
{
VariableList.Add(inputVariable);
}
}
internal void Reset()
{
GremlinVariable inputVariable = null;
if (VariableList.First() is GremlinContextVariable)
{
inputVariable = VariableList.First();
}
PivotVariable = null;
Predicates = null;
VariableList.Clear();
TableReferences.Clear();
PathList.Clear();
StepList.Clear();
IsPopulateGremlinPath = false;
CurrentContextPath = null;
ProjectVariablePropertiesList.Clear();
ProjectedProperties.Clear();
//reserve the InputVariable
if (inputVariable != null)
{
VariableList.Add(inputVariable);
}
}
/// <exception cref="System.SqlSyntaxErrorException" />
public DmlDeleteStatement(bool lowPriority,
bool quick,
bool ignore,
IList <Identifier> tableNameList,
TableReferences tableRefs, IExpression whereCondition)
{
// ------- multi-row delete------------
IsLowPriority = lowPriority;
IsQuick = quick;
IsIgnore = ignore;
if (tableNameList == null || tableNameList.IsEmpty())
{
throw new ArgumentException("argument 'tableNameList' is empty");
}
if (tableNameList is List <Identifier> )
{
tableNames = tableNameList;
}
else
{
tableNames = new List <Identifier>(tableNameList);
}
if (tableRefs == null)
{
throw new ArgumentException("argument 'tableRefs' is null");
}
TableRefs = tableRefs;
WhereCondition = whereCondition;
OrderBy = null;
Limit = null;
}
/// <exception cref="System.SqlSyntaxErrorException" />
public DmlSelectStatement(SelectOption option,
IList <Pair <IExpression, string> > selectExprList,
TableReferences tables,
IExpression where,
GroupBy group,
IExpression having,
OrderBy order,
Limit limit)
{
if (option == null)
{
throw new ArgumentException("argument 'option' is null");
}
Option = option;
if (selectExprList == null || selectExprList.IsEmpty())
{
this.selectExprList = new List <Pair <IExpression, string> >(0);
}
else
{
this.selectExprList = EnsureListType(selectExprList);
}
Tables = tables;
Where = where;
Group = group;
Having = having;
Order = order;
Limit = limit;
}
internal void Value(GremlinVariable lastVariable)
{
GremlinValueVariable newVariable = new GremlinValueVariable(lastVariable.DefaultVariableProperty());
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
SetPivotVariable(newVariable);
}
/// <exception cref="System.SqlSyntaxErrorException" />
public DmlDeleteStatement(bool lowPriority,
bool quick,
bool ignore,
IList <Identifier> tableNameList,
TableReferences tableRefs)
: this(lowPriority, quick, ignore, tableNameList, tableRefs, null)
{
}
public override IEnumerable <SyntaxNodeOrToken> ChildNodesAndTokens()
{
yield return(FromKeyword);
foreach (var nodeOrToken in TableReferences.GetWithSeparators())
{
yield return(nodeOrToken);
}
}
internal void DropVertex(GremlinVariable dropVertexVariable)
{
GremlinVariableProperty variableProperty = dropVertexVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinDropVariable dropVariable = new GremlinDropVertexVariable(variableProperty);
VariableList.Add(dropVariable);
TableReferences.Add(dropVariable);
SetPivotVariable(dropVariable);
}
internal void DropEdge(GremlinVariable dropEdgeVariable)
{
var sourceProperty = dropEdgeVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
var edgeProperty = dropEdgeVariable.GetVariableProperty(GremlinKeyword.EdgeID);
GremlinDropVariable dropVariable = new GremlinDropEdgeVariable(sourceProperty, edgeProperty);
VariableList.Add(dropVariable);
TableReferences.Add(dropVariable);
SetPivotVariable(dropVariable);
}
internal void BothV(GremlinVariable lastVariable)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinVariableProperty sinkProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSinkV);
GremlinBoundVertexVariable bothVertex = new GremlinBoundVertexVariable(lastVariable.GetEdgeType(), sourceProperty, sinkProperty);
VariableList.Add(bothVertex);
TableReferences.Add(bothVertex);
SetPivotVariable(bothVertex);
}
internal void Reset()
{
PivotVariable = null;
Predicates = null;
VariableList.Clear();
TableReferences.Clear();
PathList.Clear();
StepList.Clear();
IsPopulateGremlinPath = false;
CurrentContextPath = null;
ProjectVariablePropertiesList.Clear();
ProjectedProperties.Clear();
}
internal void OutE(GremlinVariable lastVariable, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjEdge = lastVariable.GetVariableProperty(GremlinKeyword.EdgeAdj);
GremlinVariableProperty labelProperty = lastVariable.GetVariableProperty(GremlinKeyword.Label);
GremlinBoundEdgeTableVariable outEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty, adjEdge, labelProperty, WEdgeType.OutEdge);
VariableList.Add(outEdgeTable);
TableReferences.Add(outEdgeTable);
AddLabelPredicateForEdge(outEdgeTable, edgeLabels);
AddPath(new GremlinMatchPath(lastVariable, outEdgeTable, null));
SetPivotVariable(outEdgeTable);
}
internal void BothE(GremlinVariable lastVariable, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjReverseEdge = lastVariable.GetVariableProperty(GremlinKeyword.ReverseEdgeAdj);
GremlinVariableProperty adjEdge = lastVariable.GetVariableProperty(GremlinKeyword.EdgeAdj);
GremlinVariableProperty labelProperty = lastVariable.GetVariableProperty(GremlinKeyword.Label);
GremlinBoundEdgeTableVariable bothEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty, adjEdge, adjReverseEdge, labelProperty,
WEdgeType.BothEdge);
VariableList.Add(bothEdgeTable);
TableReferences.Add(bothEdgeTable);
AddLabelPredicateForEdge(bothEdgeTable, edgeLabels);
SetPivotVariable(bothEdgeTable);
}
internal void PopulateGremlinPath()
{
if (IsPopulateGremlinPath)
{
return;
}
GremlinPathVariable newVariable = new GremlinPathVariable(GetCurrAndChildGremlinStepList());
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
CurrentContextPath = newVariable;
IsPopulateGremlinPath = true;
}
internal void PopulateLocalPath()
{
if (ContextLocalPath != null)
{
return;
}
ProjectedProperties.Add(GremlinKeyword.Path);
foreach (var step in StepList)
{
step.PopulateLocalPath();
}
GremlinLocalPathVariable newVariable = new GremlinLocalPathVariable(StepList);
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
ContextLocalPath = newVariable;
}
internal void Values(GremlinVariable lastVariable, List <string> propertyKeys)
{
if (propertyKeys.Count == 0)
{
lastVariable.Populate(GremlinKeyword.Star);
}
else
{
foreach (var property in propertyKeys)
{
lastVariable.Populate(property);
}
}
GremlinValuesVariable newVariable = new GremlinValuesVariable(lastVariable, propertyKeys);
VariableList.Add(newVariable);
TableReferences.Add(newVariable);
SetPivotVariable(newVariable);
}
internal void OutV(GremlinVariable lastVariable)
{
if (lastVariable is GremlinFreeEdgeTableVariable)
{
var path = GetPathFromPathList(lastVariable);
if (path != null && path.SourceVariable != null)
{
if (IsVariableInCurrentContext(path.SourceVariable))
{
SetPivotVariable(path.SourceVariable);
}
else
{
GremlinContextVariable newContextVariable = GremlinContextVariable.Create(path.SourceVariable);
VariableList.Add(newContextVariable);
SetPivotVariable(newContextVariable);
}
}
else
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinTableVariable outVertex = lastVariable.CreateAdjVertex(sourceProperty);
if (path != null)
{
path.SetSourceVariable(outVertex);
}
VariableList.Add(outVertex);
TableReferences.Add(outVertex);
SetPivotVariable(outVertex);
}
}
else
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinTableVariable outVertex = new GremlinBoundVertexVariable(lastVariable.GetEdgeType(), sourceProperty);
VariableList.Add(outVertex);
TableReferences.Add(outVertex);
SetPivotVariable(outVertex);
}
}
internal void OtherV(GremlinVariable lastVariable)
{
switch (lastVariable.GetEdgeType())
{
case WEdgeType.Undefined:
case WEdgeType.BothEdge:
GremlinVariableProperty otherProperty = lastVariable.GetVariableProperty(GremlinKeyword.EdgeOtherV);
GremlinBoundVertexVariable otherVertex = new GremlinBoundVertexVariable(lastVariable.GetEdgeType(), otherProperty);
VariableList.Add(otherVertex);
TableReferences.Add(otherVertex);
SetPivotVariable(otherVertex);
break;
case WEdgeType.InEdge:
OutV(lastVariable);
break;
case WEdgeType.OutEdge:
InV(lastVariable);
break;
}
}
internal void In(GremlinVariable lastVariable, List <string> edgeLabels)
{
GremlinVariableProperty sourceProperty = lastVariable.GetVariableProperty(GremlinKeyword.NodeID);
GremlinVariableProperty adjReverseEdge = lastVariable.GetVariableProperty(GremlinKeyword.ReverseEdgeAdj);
GremlinVariableProperty labelProperty = lastVariable.GetVariableProperty(GremlinKeyword.Label);
GremlinBoundEdgeTableVariable inEdgeTable = new GremlinBoundEdgeTableVariable(sourceProperty, adjReverseEdge,
labelProperty, WEdgeType.InEdge);
VariableList.Add(inEdgeTable);
TableReferences.Add(inEdgeTable);
AddLabelPredicateForEdge(inEdgeTable, edgeLabels);
GremlinVariableProperty edgeProperty = inEdgeTable.GetVariableProperty(GremlinKeyword.EdgeSourceV);
GremlinBoundVertexVariable outVertex = new GremlinBoundVertexVariable(inEdgeTable.GetEdgeType(), edgeProperty);
VariableList.Add(outVertex);
TableReferences.Add(outVertex);
AddPath(new GremlinMatchPath(outVertex, inEdgeTable, lastVariable));
SetPivotVariable(outVertex);
}
public void Visit(TableReferences node)
{
var list = node.TableReferenceList;
VisitChild(1, _verdictColumn, _verdictGroupFunc, list);
}
internal bool IsVariableInCurrentContext(GremlinVariable variable)
{
return(TableReferences.Contains(variable));
}
public virtual void Visit(TableReferences node)
{
VisitInternal(node.TableReferenceList);
}
/// <exception cref="System.SqlSyntaxErrorException" />
public override DmlSelectStatement Select()
{
Match(MySqlToken.KwSelect);
var option = SelectOption();
var exprList = SelectExprList();
TableReferences tables = null;
IExpression where = null;
GroupBy group = null;
IExpression having = null;
OrderBy order = null;
Limit limit = null;
var dual = false;
if (lexer.Token() == MySqlToken.KwFrom)
{
if (lexer.NextToken() == MySqlToken.KwDual)
{
lexer.NextToken();
dual = true;
IList <TableReference> trs = new List <TableReference>(1);
trs.Add(new Dual());
tables = new TableReferences(trs);
}
else
{
tables = TableRefs();
}
}
if (lexer.Token() == MySqlToken.KwWhere)
{
lexer.NextToken();
where = exprParser.Expression();
}
if (!dual)
{
group = GroupBy();
if (lexer.Token() == MySqlToken.KwHaving)
{
lexer.NextToken();
having = exprParser.Expression();
}
order = OrderBy();
}
limit = Limit();
if (!dual)
{
switch (lexer.Token())
{
case MySqlToken.KwFor:
{
lexer.NextToken();
Match(MySqlToken.KwUpdate);
option.lockMode = LockMode.ForUpdate;
break;
}
case MySqlToken.KwLock:
{
lexer.NextToken();
Match(MySqlToken.KwIn);
MatchIdentifier("SHARE");
MatchIdentifier("MODE");
option.lockMode = LockMode.LockInShareMode;
break;
}
}
}
return(new DmlSelectStatement(option, exprList, tables, where, group, having, order, limit));
}