public override int Visit(SqlJoinCollectionExpression sqlJoinCollectionExpression)
{
int hashCode = SqlJoinCollectionExpressionHashCode;
hashCode = CombineHashes(hashCode, sqlJoinCollectionExpression.LeftExpression.Accept(this));
hashCode = CombineHashes(hashCode, sqlJoinCollectionExpression.RightExpression.Accept(this));
return(hashCode);
}
public override void Visit(SqlJoinCollectionExpression sqlJoinCollectionExpression)
{
sqlJoinCollectionExpression.Left.Accept(this);
this.WriteNewline();
this.WriteTab();
this.writer.Write(" JOIN ");
sqlJoinCollectionExpression.Right.Accept(this);
}
public override SqlObject VisitJoinCollectionExpression([NotNull] sqlParser.JoinCollectionExpressionContext context)
{
Contract.Requires(context != null);
SqlCollectionExpression left = (SqlCollectionExpression)this.Visit(context.collection_expression(0));
SqlCollectionExpression right = (SqlCollectionExpression)this.Visit(context.collection_expression(1));
return(SqlJoinCollectionExpression.Create(left, right));
}
/// <summary>
/// Create a FROM clause from a set of FROM parameter bindings.
/// </summary>
/// <returns>The created FROM clause.</returns>
private SqlFromClause CreateFrom(SqlCollectionExpression inputCollectionExpression)
{
bool first = true;
foreach (Binding paramDef in this.fromParameters.GetBindings())
{
// If input collection expression is provided, the first binding,
// which is the input paramter name, should be omitted.
if (first)
{
first = false;
if (inputCollectionExpression != null)
{
continue;
}
}
ParameterExpression parameter = paramDef.Parameter;
SqlCollection paramBinding = paramDef.ParameterDefinition;
SqlIdentifier identifier = SqlIdentifier.Create(parameter.Name);
SqlCollectionExpression collExpr;
if (!paramDef.IsInCollection)
{
SqlCollection collection = paramBinding ?? SqlInputPathCollection.Create(identifier, null);
SqlIdentifier alias = paramBinding == null ? null : identifier;
collExpr = SqlAliasedCollectionExpression.Create(collection, alias);
}
else
{
collExpr = SqlArrayIteratorCollectionExpression.Create(identifier, paramBinding);
}
if (inputCollectionExpression != null)
{
inputCollectionExpression = SqlJoinCollectionExpression.Create(inputCollectionExpression, collExpr);
}
else
{
inputCollectionExpression = collExpr;
}
}
SqlFromClause fromClause = SqlFromClause.Create(inputCollectionExpression);
return(fromClause);
}
public override bool Visit(SqlJoinCollectionExpression first, SqlObject secondAsObject)
{
if (!(secondAsObject is SqlJoinCollectionExpression second))
{
return(false);
}
if (!Equals(first.Left, second.Left))
{
return(false);
}
if (!Equals(first.Right, second.Right))
{
return(false);
}
return(true);
}
public abstract void Visit(SqlJoinCollectionExpression sqlObject);
public override SqlObject Visit(SqlJoinCollectionExpression sqlJoinCollectionExpression)
{
return(SqlJoinCollectionExpression.Create(
sqlJoinCollectionExpression.Left.Accept(this) as SqlCollectionExpression,
sqlJoinCollectionExpression.Right.Accept(this) as SqlCollectionExpression));
}
public abstract TResult Visit(SqlJoinCollectionExpression collectionExpression, TArg input);
public abstract void Visit(SqlJoinCollectionExpression collectionExpression);
public abstract TResult Visit(SqlJoinCollectionExpression sqlObject);
public void JoinCollectionExpressionTest()
{
// FROM f
// JOIN c IN f.children
// JOIN p in c.pets
SqlAliasedCollectionExpression fromf = SqlAliasedCollectionExpression.Create(
SqlInputPathCollection.Create(
SqlIdentifier.Create("f"),
relativePath: null),
alias: null);
SqlArrayIteratorCollectionExpression cInFDotChildren = SqlArrayIteratorCollectionExpression.Create(
SqlIdentifier.Create("c"),
SqlInputPathCollection.Create(
SqlIdentifier.Create("f"),
SqlStringPathExpression.Create(
null,
SqlStringLiteral.Create("children"))));
SqlJoinCollectionExpression joinFC = SqlJoinCollectionExpression.Create(
fromf,
cInFDotChildren);
CosmosElement andersenChild1 = CosmosElement.Parse(@"
{
""f"": {
""id"": ""AndersenFamily"",
""lastName"": ""Andersen"",
""parents"": [
{ ""firstName"": ""Thomas"" },
{ ""firstName"": ""Mary Kay""}
],
""children"": [
{
""firstName"": ""Henriette Thaulow"",
""gender"": ""female"",
""grade"": 5,
""pets"": [{ ""givenName"": ""Fluffy"" }]
}
],
""address"": { ""state"": ""WA"", ""county"": ""King"", ""city"": ""seattle"" },
""creationDate"": 1431620472,
""isRegistered"": true,
""_rid"": ""0fomAIxnukU1AQAAAAAAAA==""
},
""c"": {
""firstName"": ""Henriette Thaulow"",
""gender"": ""female"",
""grade"": 5,
""pets"": [{ ""givenName"": ""Fluffy"" }]
}, ""_rid"": ""0fomAIxnukU1AQAAAAAAAA==""
}");
CosmosElement wakeFieldChild1 = CosmosElement.Parse(@"
{
""f"": {
""id"": ""WakefieldFamily"",
""parents"": [
{ ""familyName"": ""Wakefield"", ""givenName"": ""Robin"" },
{ ""familyName"": ""Miller"", ""givenName"": ""Ben"" }
],
""children"": [
{
""familyName"": ""Merriam"",
""givenName"": ""Jesse"",
""gender"": ""female"", ""grade"": 1,
""pets"": [
{ ""givenName"": ""Goofy"" },
{ ""givenName"": ""Shadow"" }
]
},
{
""familyName"": ""Miller"",
""givenName"": ""Lisa"",
""gender"": ""female"",
""grade"": 8 }
],
""address"": { ""state"": ""NY"", ""county"": ""Manhattan"", ""city"": ""NY"" },
""creationDate"": 1431620462,
""isRegistered"": false,
""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
},
""c"": {
""familyName"": ""Merriam"",
""givenName"": ""Jesse"",
""gender"": ""female"", ""grade"": 1,
""pets"": [
{ ""givenName"": ""Goofy"" },
{ ""givenName"": ""Shadow"" }
]
}, ""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
}");
CosmosElement wakeFieldChild2 = CosmosElement.Parse(@"
{
""f"": {
""id"": ""WakefieldFamily"",
""parents"": [
{ ""familyName"": ""Wakefield"", ""givenName"": ""Robin"" },
{ ""familyName"": ""Miller"", ""givenName"": ""Ben"" }
],
""children"": [
{
""familyName"": ""Merriam"",
""givenName"": ""Jesse"",
""gender"": ""female"", ""grade"": 1,
""pets"": [
{ ""givenName"": ""Goofy"" },
{ ""givenName"": ""Shadow"" }
]
},
{
""familyName"": ""Miller"",
""givenName"": ""Lisa"",
""gender"": ""female"",
""grade"": 8 }
],
""address"": { ""state"": ""NY"", ""county"": ""Manhattan"", ""city"": ""NY"" },
""creationDate"": 1431620462,
""isRegistered"": false,
""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
},
""c"": {
""familyName"": ""Miller"",
""givenName"": ""Lisa"",
""gender"": ""female"",
""grade"": 8 }, ""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
}");
AssertEvaluation(new CosmosElement[] { andersenChild1, wakeFieldChild1, wakeFieldChild2 }, joinFC, DataSource);
SqlArrayIteratorCollectionExpression pInCDotPets = SqlArrayIteratorCollectionExpression.Create(
SqlIdentifier.Create("p"),
SqlInputPathCollection.Create(
SqlIdentifier.Create("c"),
SqlStringPathExpression.Create(
null,
SqlStringLiteral.Create("pets"))));
SqlJoinCollectionExpression joinFCP = SqlJoinCollectionExpression.Create(
SqlJoinCollectionExpression.Create(fromf, cInFDotChildren),
pInCDotPets);
CosmosElement andersenChild1Pet1 = CosmosElement.Parse(@"
{
""f"": {
""id"": ""AndersenFamily"",
""lastName"": ""Andersen"",
""parents"": [
{ ""firstName"": ""Thomas"" },
{ ""firstName"": ""Mary Kay""}
],
""children"": [
{
""firstName"": ""Henriette Thaulow"",
""gender"": ""female"",
""grade"": 5,
""pets"": [{ ""givenName"": ""Fluffy"" }]
}
],
""address"": { ""state"": ""WA"", ""county"": ""King"", ""city"": ""seattle"" },
""creationDate"": 1431620472,
""isRegistered"": true,
""_rid"": ""0fomAIxnukU1AQAAAAAAAA==""
},
""c"": {
""firstName"": ""Henriette Thaulow"",
""gender"": ""female"",
""grade"": 5,
""pets"": [{ ""givenName"": ""Fluffy"" }]
},
""p"": { ""givenName"": ""Fluffy"" },
""_rid"": ""0fomAIxnukU1AQAAAAAAAA==""
}");
CosmosElement wakeFieldChild1Pet1 = CosmosElement.Parse(@"
{
""f"": {
""id"": ""WakefieldFamily"",
""parents"": [
{ ""familyName"": ""Wakefield"", ""givenName"": ""Robin"" },
{ ""familyName"": ""Miller"", ""givenName"": ""Ben"" }
],
""children"": [
{
""familyName"": ""Merriam"",
""givenName"": ""Jesse"",
""gender"": ""female"", ""grade"": 1,
""pets"": [
{ ""givenName"": ""Goofy"" },
{ ""givenName"": ""Shadow"" }
]
},
{
""familyName"": ""Miller"",
""givenName"": ""Lisa"",
""gender"": ""female"",
""grade"": 8 }
],
""address"": { ""state"": ""NY"", ""county"": ""Manhattan"", ""city"": ""NY"" },
""creationDate"": 1431620462,
""isRegistered"": false,
""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
},
""c"": {
""familyName"": ""Merriam"",
""givenName"": ""Jesse"",
""gender"": ""female"", ""grade"": 1,
""pets"": [
{ ""givenName"": ""Goofy"" },
{ ""givenName"": ""Shadow"" }
]
},
""p"": { ""givenName"": ""Goofy"" },
""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
}");
CosmosElement wakeFieldChild1Pet2 = CosmosElement.Parse(@"
{
""f"": {
""id"": ""WakefieldFamily"",
""parents"": [
{ ""familyName"": ""Wakefield"", ""givenName"": ""Robin"" },
{ ""familyName"": ""Miller"", ""givenName"": ""Ben"" }
],
""children"": [
{
""familyName"": ""Merriam"",
""givenName"": ""Jesse"",
""gender"": ""female"", ""grade"": 1,
""pets"": [
{ ""givenName"": ""Goofy"" },
{ ""givenName"": ""Shadow"" }
]
},
{
""familyName"": ""Miller"",
""givenName"": ""Lisa"",
""gender"": ""female"",
""grade"": 8 }
],
""address"": { ""state"": ""NY"", ""county"": ""Manhattan"", ""city"": ""NY"" },
""creationDate"": 1431620462,
""isRegistered"": false,
""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
},
""c"": {
""familyName"": ""Merriam"",
""givenName"": ""Jesse"",
""gender"": ""female"", ""grade"": 1,
""pets"": [
{ ""givenName"": ""Goofy"" },
{ ""givenName"": ""Shadow"" }
]
},
""p"": { ""givenName"": ""Shadow"" },
""_rid"": ""0fomAIxnukU1AQAAAAAAAB==""
}");
AssertEvaluation(new CosmosElement[] { andersenChild1Pet1, wakeFieldChild1Pet1, wakeFieldChild1Pet2 }, joinFCP, DataSource);
// SELECT c.id
// FROM c
// JOIN c.nonExistent
SqlAliasedCollectionExpression c = SqlAliasedCollectionExpression.Create(
SqlInputPathCollection.Create(
SqlIdentifier.Create("c"),
relativePath: null),
alias: null);
SqlAliasedCollectionExpression cDotNonExistent = SqlAliasedCollectionExpression.Create(
SqlInputPathCollection.Create(
SqlIdentifier.Create("c"),
SqlStringPathExpression.Create(
null,
SqlStringLiteral.Create("nonExistent"))),
alias: null);
SqlJoinCollectionExpression joinCAndCDotNonExistent = SqlJoinCollectionExpression.Create(
c,
cDotNonExistent);
AssertEvaluation(new CosmosElement[] { }, joinCAndCDotNonExistent, DataSource);
}
public abstract TResult Visit(SqlJoinCollectionExpression collectionExpression);
public abstract TOutput Visit(SqlJoinCollectionExpression sqlObject, TArg input);
/// <summary>
/// Visits a SqlJoinCollectionExpression and transforms the documents accordingly.
/// </summary>
/// <param name="collectionExpression">The collection expression to visit.</param>
/// <param name="documents">The documents to transform.</param>
/// <returns>The transformed documents according to the collection expression.</returns>
public override IEnumerable <CosmosElement> Visit(SqlJoinCollectionExpression collectionExpression, IEnumerable <CosmosElement> documents)
{
//If the query was:
//SELECT blah
//FROM f
//JOIN c IN f.children
//and the document was
//{
// "children" : [{"name" : "John"}, {"name" : "Sally"}]
//}
//then the results would be:
//{
// "f" : { "children" : [{"name" : "John"}, {"name" : "Sally"}] }
// "c" : {"name" : "John"}
//}
//and
//{
// "f" : { "children" : [{"name" : "John"}, {"name" : "Sally"}] }
// "c" : {"name" : "Sally"}
//}
//Notice that the result set is larger than the input
//This is because we emitted one document for each child in the original document
//wrapped it with the provided alias
//and merged the results from the source expression.
IEnumerable <CosmosElement> collection1 = collectionExpression.Left.Accept(this, documents);
// Perform the select many and merge the documents
foreach (CosmosObject document1 in collection1)
{
IEnumerable <CosmosElement> collection2 = collectionExpression.Right.Accept(this, new CosmosElement[] { document1 });
foreach (CosmosObject document2 in collection2)
{
Dictionary <string, CosmosElement> mergedDocument = new Dictionary <string, CosmosElement>();
foreach (KeyValuePair <string, CosmosElement> property in document1)
{
if (property.Key != "_rid")
{
mergedDocument[property.Key] = property.Value;
}
}
foreach (KeyValuePair <string, CosmosElement> property in document2)
{
if (property.Key != "_rid")
{
mergedDocument[property.Key] = property.Value;
}
}
// Add the _rid at the end so we can break ties in the sort later.
mergedDocument["_rid"] = document1["_rid"];
yield return(CosmosObject.Create(mergedDocument));
}
}
}
