secondo/bin/Scripts/CreateDistributedDblpPGraph.sec

# Script to create a distributed property graph for the dblp dataset.

# Get the dblp data

# Within a directory, say /home/ralf/Daten, execute: 

# wget https://dblp.uni-trier.de/xml/dblp.xml.gz
# gunzip dblp.xml.gz


# (Start monitors)

# Set up a database

create database dblpgraph0620;

open database dblpgraph0620;

let Document_raw = '/home/ralf/Daten/dblp.xml' dblpimport['/home/ralf/Daten/Stopwords.txt']

let Document_raw2 = Document_raw feed head[1000] addcounter[Docid, 1] consume

# create small template graph on master

{
	let Document = Document_raw2 feed remove[AuthorsList, Keywords] consume
|   let Keyword = Document_raw2 feed project[Keywords] unnest[Keywords] rduph[] 
	  renameAttr[Word: Keyword]
	  addcounter[Wordid, 1] consume
|	let HAS_KEYWORD = Document_raw2 feed  project[Docid, Keywords] unnest[Keywords] {d}
	  Keyword feed itHashJoin[Keyword_d, Word]
	  projectextend[Wordid; Docid: .Docid_d]
	  project[Docid, Wordid]
	  consume
|	let Author = Document_raw2 feed  project[AuthorsList] unnest[AuthorsList] rduph[] 
	  addcounter[Authorid, 1] consume
|	let WROTE = Document_raw2 feed project[Docid, AuthorsList] unnest[AuthorsList] {d}
	  Author feed itHashJoin[Name_d, Name]
	  projectextend[Authorid; Docid: .Docid_d]
	  consume
|	let Journals = Document_raw2 feed project[Journal] filter[.Journal # ""]
	  renameAttr[Name: Journal]
	  rduph[] 
	  addcounter[Journalid, 1] consume
|	let AT_JOURNAL = Document_raw2 feed filter[.Type = "article"] {d} project[Docid_d, Journal_d]
	  Journals feed itHashJoin[Journal_d, Name]
	  renameAttr[Docid: Docid_d]
	  project[Docid, Journalid]
	  consume
|	let Conference = Document_raw2 feed filter[.Type = "inproceedings"] project[Booktitle] 
	  renameAttr[Name: Booktitle]
	  rduph[] 
	  addcounter[Conferenceid, 1] consume
|	let AT_CONF = Document_raw2 feed {d} project[Docid_d, Booktitle_d]
	  Conference feed itHashJoin[Booktitle_d, Name]
	  renameAttr[Docid: Docid_d]
	  project[Docid, Conferenceid]
	  consume
|	let Publisher = Document_raw2 feed filter[isdefined(.Publisher)] project[Publisher] 
	  renameAttr[Name: Publisher]
	  rduph[] 
	  addcounter[Publisherid, 1] consume
|	let PUBLISHED_BY = Document_raw2 feed {d} project[Docid_d, Publisher_d]
	  Publisher feed itHashJoin[Publisher_d, Name]
	  renameAttr[Docid: Docid_d]
	  project[Docid, Publisherid]
	  consume
}


{
let dblp =createpgraph("dblp")
|
query dblp cfg["log","10"]|
query dblp cfg["dotquery","1"]
|
query dblp addnodesrel["Document", "Docid"]|
query dblp addnodesrel["Author", "Authorid"]|
query dblp addnodesrel["Keyword", "Wordid"]|
query dblp addnodesrel["Journals", "Journalid"]|
query dblp addnodesrel["Conference", "Conferenceid"]|
query dblp addnodesrel["Publisher", "Publisherid"]
|
query dblp addedgesrel["AT_CONF", "Docid=Document.Docid", "Conferenceid=Conference.Conferenceid"] |
query dblp addedgesrel["AT_JOURNAL", "Docid=Document.Docid", "Journalid=Journals.Journalid"] |
query dblp addedgesrel["HAS_KEYWORD", "Docid=Document.Docid", "Wordid=Keyword.Wordid"] |
query dblp addedgesrel["PUBLISHED_BY", "Docid=Document.Docid", "Publisherid=Publisher.Publisherid"] |
query dblp addedgesrel["WROTE","Authorid=Author.Authorid","Docid=Document.Docid"] 
|
query dblp addindex["Author","Name"]   |
query dblp addindex["Keyword","Word"]  |
query dblp addindex["Journals","Name"] |
query dblp addindex["Conference","Name"] 
|
query dblp info
}


# create distributed database

restore Workers from WorkersNewton

let NWorkers = Workers count

query share("dblp", TRUE, Workers)

# Distribute data to the workers by Docid. Then convert darray to a simple darray (sdarray). In a simple darray, all fields on workers have the same names, for example, "Document" instead of "Document_28".

let DocumentB1 = Document_raw feed addcounter[Docid, 1] ddistribute2["DocumentB1", Docid, NWorkers, Workers]

let DocumentB2 = DocumentB1 makeSimple[FALSE, "DocumentB2"];
delete DocumentB1


# Create relations

# In such a command, do not use quotes!

query DocumentB2 dcommand['{
	let Document = DocumentB2 feed remove[AuthorsList, Keywords] consume
|   	let Keyword = DocumentB2 feed project[Keywords] unnest[Keywords] rduph[] 
	  renameAttr[Word: Keyword]
	  addcounter[Wordid, 1] consume
|	let HAS_KEYWORD = DocumentB2 feed project[Docid, Keywords] unnest[Keywords] {d}
	  Keyword feed itHashJoin[Keyword_d, Word]
	  projectextend[Wordid; Docid: .Docid_d]
	  project[Docid, Wordid]
	  consume
|	let Author = DocumentB2 feed project[AuthorsList] unnest[AuthorsList] rduph[] 
	  addcounter[Authorid, 1] consume
|	let WROTE = DocumentB2 feed project[Docid, AuthorsList] unnest[AuthorsList] {d}
	  Author feed itHashJoin[Name_d, Name]
	  projectextend[Authorid; Docid: .Docid_d]
	  consume
|	let Journals = DocumentB2 feed project[Journal] filter[.Journal # ""]
	  renameAttr[Name: Journal]
	  rduph[] 
	  addcounter[Journalid, 1] consume
|	let AT_JOURNAL = DocumentB2 feed filter[.Type = "article"] {d} project[Docid_d, Journal_d]
	  Journals feed itHashJoin[Journal_d, Name]
	  renameAttr[Docid: Docid_d]
	  project[Docid, Journalid]
	  consume
|	let Conference = DocumentB2 feed filter[.Type = "inproceedings"] project[Booktitle] 
	  renameAttr[Name: Booktitle]
	  rduph[] 
	  addcounter[Conferenceid, 1] consume
|	let AT_CONF = DocumentB2 feed {d} project[Docid_d, Booktitle_d]
	  Conference feed itHashJoin[Booktitle_d, Name]
	  renameAttr[Docid: Docid_d]
	  project[Docid, Conferenceid]
	  consume
|	let Publisher = DocumentB2 feed filter[isdefined(.Publisher)] project[Publisher] 
	  renameAttr[Name: Publisher]
	  rduph[] 
	  addcounter[Publisherid, 1] consume
|	let PUBLISHED_BY = DocumentB2 feed {d} project[Docid_d, Publisher_d]
	  Publisher feed itHashJoin[Publisher_d, Name]
	  renameAttr[Docid: Docid_d]
	  project[Docid, Publisherid]
	  consume
  }']
  consume
  
  

let Control = createintdarray("Control", Workers, NWorkers)
  
# Befory querying, the graph must be loaded into memory on master and workers

query dblp loadgraph

query Control dcommand['query memclear()'] filter[.Ok] count;
query Control dcommand['query meminit(3600)'] filter[.Ok] count;
query Control dcommand['query dblp loadgraph'] filter[.Ok] count

# 59 seconds

# Example query

query dblp match3['
  MATCH
    (doc)-[HAS_KEYWORD]->(w {Word: "Indoor"})
  RETURN
    doc.Authors, doc.Title, doc.Year
'] consume


query Control dmap["", dblp match3['
  MATCH
    (doc)-[HAS_KEYWORD]->(w {Word: "Symbolic"}), (doc)-[HAS_KEYWORD]->(w2 {Word: "Trajectory"})
  RETURN
    doc.Authors, doc.Title, doc.Year
']]
dsummarize consume