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Package com.gpudb.protocol

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Class QueryGraphRequest

java.lang.Object
com.gpudb.protocol.QueryGraphRequest
All Implemented Interfaces:
org.apache.avro.generic.GenericContainer, org.apache.avro.generic.IndexedRecord
public class QueryGraphRequest extends Object implements org.apache.avro.generic.IndexedRecord
A set of parameters for GPUdb.queryGraph.

Employs a topological query on a graph generated a-priori by GPUdb.createGraph and returns a list of adjacent edge(s) or node(s), also known as an adjacency list, depending on what’s been provided to the endpoint; providing edges will return nodes and providing nodes will return edges.

To determine the node(s) or edge(s) adjacent to a value from a given column, provide a list of values to queries. This field can be populated with column values from any table as long as the type is supported by the given identifier. See Query Identifiers for more information.

To return the adjacency list in the response, leave adjacencyTable empty.

IMPORTANT: It’s highly recommended that you review the Graphs and Solvers concepts documentation, the Graph REST Tutorial, and/or some /match/graph examples before using this endpoint.

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    Constructor Details

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      QueryGraphRequest

      public QueryGraphRequest()
      Constructs a QueryGraphRequest object with default parameters.

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      QueryGraphRequest

      public QueryGraphRequest(String graphName, List<String> queries, List<String> restrictions, String adjacencyTable, int rings, Map<String,String> options)
      Constructs a QueryGraphRequest object with the specified parameters.
      Parameters:
      graphName - Name of the graph resource to query.
      queries - Nodes or edges to be queried specified using query identifiers. Identifiers can be used with existing column names, e.g., ‘table.column AS QUERY_NODE_ID’, raw values, e.g., ‘0, 2 AS QUERY_NODE_ID’, or expressions, e.g., ‘ST_MAKEPOINT(table.x, table.y) AS QUERY_NODE_WKTPOINT’. Multiple values can be provided as long as the same identifier is used for all values. If using raw values in an identifier combination, the number of values specified must match across the combination.
      restrictions - Additional restrictions to apply to the nodes/edges of an existing graph. Restrictions must be specified using identifiers; identifiers are grouped as combinations. Identifiers can be used with existing column names, e.g., ‘table.column AS RESTRICTIONS_EDGE_ID’, expressions, e.g., ‘column/2 AS RESTRICTIONS_VALUECOMPARED’, or raw values, e.g., ‘0, 0, 0, 1 AS RESTRICTIONS_ONOFFCOMPARED’. If using raw values in an identifier combination, the number of values specified must match across the combination. The default value is an empty List.
      adjacencyTable - Name of the table to store the resulting adjacencies, in [schema_name.]table_name format, using standard name resolution rules and meeting table naming criteria. If left blank, the query results are instead returned in the response. If the ‘QUERY_TARGET_NODE_LABEL’ query identifier is used in queries, then two additional columns will be available: ‘PATH_ID’ and ‘RING_ID’. See Using Labels for more information. The default value is ”.
      rings - Sets the number of rings around the node to query for adjacency, with ‘1’ being the edges directly attached to the queried node. Also known as number of hops. For example, if it is set to ‘2’, the edge(s) directly attached to the queried node(s) will be returned; in addition, the edge(s) attached to the node(s) attached to the initial ring of edge(s) surrounding the queried node(s) will be returned. If the value is set to ‘0’, any nodes that meet the criteria in queries and restrictions will be returned. This parameter is only applicable when querying nodes. The default value is 1.
      options - Additional parameters.
      • FORCE_UNDIRECTED: If set to TRUE, all inbound edges and outbound edges relative to the node will be returned. If set to FALSE, only outbound edges relative to the node will be returned. This parameter is only applicable if the queried graph graphName is directed and when querying nodes. Consult Directed Graphs for more details. Supported values:The default value is FALSE.
      • LIMIT: When specified (>0), limits the number of query results. The size of the nodes table will be limited by the LIMIT value. The default value is ‘0’.
      • OUTPUT_WKT_PATH: If true then concatenated wkt line segments will be added as the WKT column of the adjacency table. Supported values:The default value is FALSE.
      • AND_LABELS: If set to TRUE, the result of the query has entities that satisfy all of the target labels, instead of any. Supported values:The default value is FALSE.
      • SERVER_ID: Indicates which graph server(s) to send the request to. Default is to send to the server, amongst those containing the corresponding graph, that has the most computational bandwidth.
      • OUTPUT_CHARN_LENGTH: When specified (>0 and <=256), limits the number of char length on the output tables for string based nodes. The default length is 64. The default value is ‘64’.
      • FIND_COMMON_LABELS: If set to true, for many-to-many queries or multi-level traversals, it lists the common labels between the source and target nodes and edge labels in each path. Otherwise (zero rings), it’ll list all labels of the node(s) queried. Supported values:The default value is FALSE.
      The default value is an empty Map.

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    Method Details

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      getClassSchema

      public static org.apache.avro.Schema getClassSchema()
      This method supports the Avro framework and is not intended to be called directly by the user.
      Returns:
      The schema for the class.

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      getGraphName

      public String getGraphName()
      Name of the graph resource to query.
      Returns:
      The current value of graphName.

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      setGraphName

      public QueryGraphRequest setGraphName(String graphName)
      Name of the graph resource to query.
      Parameters:
      graphName - The new value for graphName.
      Returns:
      this to mimic the builder pattern.

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      getQueries

      public List<String> getQueries()
      Nodes or edges to be queried specified using query identifiers. Identifiers can be used with existing column names, e.g., ‘table.column AS QUERY_NODE_ID’, raw values, e.g., ‘0, 2 AS QUERY_NODE_ID’, or expressions, e.g., ‘ST_MAKEPOINT(table.x, table.y) AS QUERY_NODE_WKTPOINT’. Multiple values can be provided as long as the same identifier is used for all values. If using raw values in an identifier combination, the number of values specified must match across the combination.
      Returns:
      The current value of queries.

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      setQueries

      public QueryGraphRequest setQueries(List<String> queries)
      Nodes or edges to be queried specified using query identifiers. Identifiers can be used with existing column names, e.g., ‘table.column AS QUERY_NODE_ID’, raw values, e.g., ‘0, 2 AS QUERY_NODE_ID’, or expressions, e.g., ‘ST_MAKEPOINT(table.x, table.y) AS QUERY_NODE_WKTPOINT’. Multiple values can be provided as long as the same identifier is used for all values. If using raw values in an identifier combination, the number of values specified must match across the combination.
      Parameters:
      queries - The new value for queries.
      Returns:
      this to mimic the builder pattern.

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      getRestrictions

      public List<String> getRestrictions()
      Additional restrictions to apply to the nodes/edges of an existing graph. Restrictions must be specified using identifiers; identifiers are grouped as combinations. Identifiers can be used with existing column names, e.g., ‘table.column AS RESTRICTIONS_EDGE_ID’, expressions, e.g., ‘column/2 AS RESTRICTIONS_VALUECOMPARED’, or raw values, e.g., ‘0, 0, 0, 1 AS RESTRICTIONS_ONOFFCOMPARED’. If using raw values in an identifier combination, the number of values specified must match across the combination. The default value is an empty List.
      Returns:
      The current value of restrictions.

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      setRestrictions

      public QueryGraphRequest setRestrictions(List<String> restrictions)
      Additional restrictions to apply to the nodes/edges of an existing graph. Restrictions must be specified using identifiers; identifiers are grouped as combinations. Identifiers can be used with existing column names, e.g., ‘table.column AS RESTRICTIONS_EDGE_ID’, expressions, e.g., ‘column/2 AS RESTRICTIONS_VALUECOMPARED’, or raw values, e.g., ‘0, 0, 0, 1 AS RESTRICTIONS_ONOFFCOMPARED’. If using raw values in an identifier combination, the number of values specified must match across the combination. The default value is an empty List.
      Parameters:
      restrictions - The new value for restrictions.
      Returns:
      this to mimic the builder pattern.

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      getAdjacencyTable

      public String getAdjacencyTable()
      Name of the table to store the resulting adjacencies, in [schema_name.]table_name format, using standard name resolution rules and meeting table naming criteria. If left blank, the query results are instead returned in the response. If the ‘QUERY_TARGET_NODE_LABEL’ query identifier is used in queries, then two additional columns will be available: ‘PATH_ID’ and ‘RING_ID’. See Using Labels for more information. The default value is ”.
      Returns:
      The current value of adjacencyTable.

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      setAdjacencyTable

      public QueryGraphRequest setAdjacencyTable(String adjacencyTable)
      Name of the table to store the resulting adjacencies, in [schema_name.]table_name format, using standard name resolution rules and meeting table naming criteria. If left blank, the query results are instead returned in the response. If the ‘QUERY_TARGET_NODE_LABEL’ query identifier is used in queries, then two additional columns will be available: ‘PATH_ID’ and ‘RING_ID’. See Using Labels for more information. The default value is ”.
      Parameters:
      adjacencyTable - The new value for adjacencyTable.
      Returns:
      this to mimic the builder pattern.

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      getRings

      public int getRings()
      Sets the number of rings around the node to query for adjacency, with ‘1’ being the edges directly attached to the queried node. Also known as number of hops. For example, if it is set to ‘2’, the edge(s) directly attached to the queried node(s) will be returned; in addition, the edge(s) attached to the node(s) attached to the initial ring of edge(s) surrounding the queried node(s) will be returned. If the value is set to ‘0’, any nodes that meet the criteria in queries and restrictions will be returned. This parameter is only applicable when querying nodes. The default value is 1.
      Returns:
      The current value of rings.

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      setRings

      public QueryGraphRequest setRings(int rings)
      Sets the number of rings around the node to query for adjacency, with ‘1’ being the edges directly attached to the queried node. Also known as number of hops. For example, if it is set to ‘2’, the edge(s) directly attached to the queried node(s) will be returned; in addition, the edge(s) attached to the node(s) attached to the initial ring of edge(s) surrounding the queried node(s) will be returned. If the value is set to ‘0’, any nodes that meet the criteria in queries and restrictions will be returned. This parameter is only applicable when querying nodes. The default value is 1.
      Parameters:
      rings - The new value for rings.
      Returns:
      this to mimic the builder pattern.

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      getOptions

      public Map<String,String> getOptions()
      Additional parameters.
      • FORCE_UNDIRECTED: If set to TRUE, all inbound edges and outbound edges relative to the node will be returned. If set to FALSE, only outbound edges relative to the node will be returned. This parameter is only applicable if the queried graph graphName is directed and when querying nodes. Consult Directed Graphs for more details. Supported values:The default value is FALSE.
      • LIMIT: When specified (>0), limits the number of query results. The size of the nodes table will be limited by the LIMIT value. The default value is ‘0’.
      • OUTPUT_WKT_PATH: If true then concatenated wkt line segments will be added as the WKT column of the adjacency table. Supported values:The default value is FALSE.
      • AND_LABELS: If set to TRUE, the result of the query has entities that satisfy all of the target labels, instead of any. Supported values:The default value is FALSE.
      • SERVER_ID: Indicates which graph server(s) to send the request to. Default is to send to the server, amongst those containing the corresponding graph, that has the most computational bandwidth.
      • OUTPUT_CHARN_LENGTH: When specified (>0 and <=256), limits the number of char length on the output tables for string based nodes. The default length is 64. The default value is ‘64’.
      • FIND_COMMON_LABELS: If set to true, for many-to-many queries or multi-level traversals, it lists the common labels between the source and target nodes and edge labels in each path. Otherwise (zero rings), it’ll list all labels of the node(s) queried. Supported values:The default value is FALSE.
      The default value is an empty Map.
      Returns:
      The current value of options.

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      setOptions

      public QueryGraphRequest setOptions(Map<String,String> options)
      Additional parameters.
      • FORCE_UNDIRECTED: If set to TRUE, all inbound edges and outbound edges relative to the node will be returned. If set to FALSE, only outbound edges relative to the node will be returned. This parameter is only applicable if the queried graph graphName is directed and when querying nodes. Consult Directed Graphs for more details. Supported values:The default value is FALSE.
      • LIMIT: When specified (>0), limits the number of query results. The size of the nodes table will be limited by the LIMIT value. The default value is ‘0’.
      • OUTPUT_WKT_PATH: If true then concatenated wkt line segments will be added as the WKT column of the adjacency table. Supported values:The default value is FALSE.
      • AND_LABELS: If set to TRUE, the result of the query has entities that satisfy all of the target labels, instead of any. Supported values:The default value is FALSE.
      • SERVER_ID: Indicates which graph server(s) to send the request to. Default is to send to the server, amongst those containing the corresponding graph, that has the most computational bandwidth.
      • OUTPUT_CHARN_LENGTH: When specified (>0 and <=256), limits the number of char length on the output tables for string based nodes. The default length is 64. The default value is ‘64’.
      • FIND_COMMON_LABELS: If set to true, for many-to-many queries or multi-level traversals, it lists the common labels between the source and target nodes and edge labels in each path. Otherwise (zero rings), it’ll list all labels of the node(s) queried. Supported values:The default value is FALSE.
      The default value is an empty Map.
      Parameters:
      options - The new value for options.
      Returns:
      this to mimic the builder pattern.

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      getSchema

      public org.apache.avro.Schema getSchema()
      This method supports the Avro framework and is not intended to be called directly by the user.
      Specified by:
      getSchema in interface org.apache.avro.generic.GenericContainer
      Returns:
      The schema object describing this class.

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      get

      public Object get(int index)
      This method supports the Avro framework and is not intended to be called directly by the user.
      Specified by:
      get in interface org.apache.avro.generic.IndexedRecord
      Parameters:
      index - the position of the field to get
      Returns:
      value of the field with the given index.
      Throws:
      IndexOutOfBoundsException

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      put

      public void put(int index, Object value)
      This method supports the Avro framework and is not intended to be called directly by the user.
      Specified by:
      put in interface org.apache.avro.generic.IndexedRecord
      Parameters:
      index - the position of the field to set
      value - the value to set
      Throws:
      IndexOutOfBoundsException

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      equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object

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      toString

      public String toString()
      Overrides:
      toString in class Object

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      hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object