Category: Examples

The Examples category provides practical, production-ready code samples and complete applications demonstrating how to use Geode graph database effectively. From simple queries to complex distributed systems, these examples show you how to leverage Geode’s capabilities in real-world scenarios. <h3 id="introduction-to-geode-examples" class="position-relative d-flex align-items-center group"> Introduction to Geode Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="introduction-to-geode-examples" aria-haspopup="dialog" aria-label="Share link: Introduction to Geode Examples"> Share link </button> </h3><div id="headingShareModal" class="heading-share-modal" role="dialog" aria-modal="true" aria-labelledby="headingShareTitle" hidden> <div class="hsm-dialog" role="document"> <div class="hsm-header"> <h2 id="headingShareTitle" class="h6 mb-0 fw-bold">Share this section</h2> <button type="button" class="hsm-close" aria-label="Close"> </button> </div> <div class="hsm-body"> <label for="headingShareInput" class="form-label small text-muted mb-1 text-uppercase fw-bold" style="font-size: 0.7rem; letter-spacing: 0.5px;">Permalink</label> <div class="input-group mb-4 hsm-url-group"> <input id="headingShareInput" type="text" class="form-control font-monospace" readonly aria-readonly="true" style="font-size: 0.85rem;" /> <button class="btn btn-primary hsm-copy" type="button" aria-label="Copy" title="Copy"> </button> </div> <div class="small fw-bold mb-2 text-muted text-uppercase" style="font-size: 0.7rem; letter-spacing: 0.5px;">Share via</div> <div class="hsm-share-grid"> <a id="share-twitter" class="btn btn-outline-secondary w-100" target="_blank" rel="noopener noreferrer"> Twitter </a> <a id="share-linkedin" class="btn btn-outline-secondary w-100" target="_blank" rel="noopener noreferrer"> LinkedIn </a> <a id="share-facebook" class="btn btn-outline-secondary w-100" target="_blank" rel="noopener noreferrer"> Facebook </a> </div> </div> </div> </div> <style> .heading-share-modal { position: fixed; inset: 0; display: flex; justify-content: center; align-items: center; background: rgba(0, 0, 0, 0.6); z-index: 1050; padding: 1rem; backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); } .heading-share-modal[hidden] { display: none !important; } .hsm-dialog { max-width: 420px; width: 100%; background: var(--bs-body-bg, #fff); color: var(--bs-body-color, #212529); border: 1px solid var(--bs-border-color, rgba(0,0,0,0.1)); border-radius: 1rem; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); overflow: hidden; animation: hsm-fade-in 0.2s ease-out; } @keyframes hsm-fade-in { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } } [data-bs-theme="dark"] .hsm-dialog { background: #1e293b; border-color: rgba(255,255,255,0.1); color: #f8f9fa; } .hsm-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; border-bottom: 1px solid var(--bs-border-color, rgba(0,0,0,0.1)); background: rgba(0,0,0,0.02); } [data-bs-theme="dark"] .hsm-header { background: rgba(255,255,255,0.02); border-color: rgba(255,255,255,0.1); } .hsm-close { background: transparent; border: none; color: inherit; opacity: 0.5; padding: 0.25rem 0.5rem; border-radius: 0.25rem; font-size: 1.2rem; line-height: 1; transition: opacity 0.2s; } .hsm-close:hover { opacity: 1; } .hsm-body { padding: 1.5rem; } .hsm-url-group { display: flex !important; align-items: stretch; } .hsm-url-group .form-control { flex: 1; min-width: 0; margin: 0; background: var(--bs-secondary-bg, #f8f9fa); border-color: var(--bs-border-color, #dee2e6); border-top-right-radius: 0; border-bottom-right-radius: 0; height: 42px; } .hsm-url-group .btn { flex: 0 0 auto; margin: 0; margin-left: -1px; border-top-left-radius: 0; border-bottom-left-radius: 0; height: 42px; display: flex; align-items: center; justify-content: center; padding: 0 1.25rem; z-index: 2; } [data-bs-theme="dark"] .hsm-url-group .form-control { background: #0f172a; border-color: #334155; color: #e2e8f0; } .hsm-share-grid { display: flex; flex-direction: column; gap: 0.5rem; } .hsm-share-grid .btn { display: flex; align-items: center; justify-content: center; font-size: 0.9rem; padding: 0.6rem; border-color: var(--bs-border-color); width: 100%; } [data-bs-theme="dark"] .hsm-share-grid .btn { color: #e2e8f0; border-color: #475569; } [data-bs-theme="dark"] .hsm-share-grid .btn:hover { background: #334155; border-color: #cbd5e1; } </style> <script> (function(){ const modal = document.getElementById('headingShareModal'); if(!modal) return; const input = modal.querySelector('#headingShareInput'); const copyBtn = modal.querySelector('.hsm-copy'); const twitter = modal.querySelector('#share-twitter'); const linkedin = modal.querySelector('#share-linkedin'); const facebook = modal.querySelector('#share-facebook'); const closeBtn = modal.querySelector('.hsm-close'); let lastFocus=null; let trapBound=false; function buildUrl(id){ return window.location.origin + window.location.pathname + '#' + id; } function isOpen(){ return !modal.hasAttribute('hidden'); } function hydrate(id){ const url=buildUrl(id); input.value=url; const enc=encodeURIComponent(url); const text=encodeURIComponent(document.title); if(twitter) twitter.href=`https://twitter.com/intent/tweet?url=${enc}&text=${text}`; if(linkedin) linkedin.href=`https://www.linkedin.com/sharing/share-offsite/?url=${enc}`; if(facebook) facebook.href=`https://www.facebook.com/sharer/sharer.php?u=${enc}`; } function openModal(id){ lastFocus=document.activeElement; hydrate(id); if(!isOpen()){ modal.removeAttribute('hidden'); } requestAnimationFrame(()=>{ input.focus(); }); trapFocus(); } function closeModal(){ if(!isOpen()) return; modal.setAttribute('hidden',''); if(lastFocus && typeof lastFocus.focus==='function') lastFocus.focus(); } function copyCurrent(){ try{ navigator.clipboard.writeText(input.value).then(()=>feedback(true),()=>fallback()); } catch(e){ fallback(); } } function fallback(){ input.select(); try{ document.execCommand('copy'); feedback(true);}catch(e){ feedback(false);} } function feedback(ok){ if(!copyBtn) return; const icon=copyBtn.querySelector('i'); if(!icon) return; const prev=copyBtn.getAttribute('data-prev')||icon.className; if(!copyBtn.getAttribute('data-prev')) copyBtn.setAttribute('data-prev',prev); icon.className= ok ? 'fa-duotone fa-clipboard-check':'fa-duotone fa-circle-exclamation'; setTimeout(()=>{ icon.className=prev; },1800); } function handleShareClick(e){ e.preventDefault(); const btn=e.currentTarget; const id=btn.getAttribute('data-share-target'); if(id) openModal(id); } function bindShareButtons(){ document.querySelectorAll('.h-share').forEach(btn=>{ if(!btn.dataset.hShareBound){ btn.addEventListener('click', handleShareClick); btn.dataset.hShareBound='1'; } }); } bindShareButtons(); if(document.readyState==='loading'){ document.addEventListener('DOMContentLoaded', bindShareButtons); } else { requestAnimationFrame(bindShareButtons); } document.addEventListener('click', function(e){ const shareBtn=e.target.closest && e.target.closest('.h-share'); if(shareBtn && !shareBtn.dataset.hShareBound){ handleShareClick.call(shareBtn, e); } }, true); document.addEventListener('click', e=>{ if(e.target===modal) closeModal(); if(e.target.closest && e.target.closest('.hsm-close')){ e.preventDefault(); closeModal(); } if(copyBtn && (e.target===copyBtn || (e.target.closest && e.target.closest('.hsm-copy')))) { e.preventDefault(); copyCurrent(); } }); document.addEventListener('keydown', e=>{ if(e.key==='Escape' && isOpen()) closeModal(); }); function trapFocus(){ if(trapBound) return; trapBound=true; modal.addEventListener('keydown', f=>{ if(f.key==='Tab' && isOpen()){ const focusable=[...modal.querySelectorAll('a[href],button,input,textarea,select,[tabindex]:not([tabindex="-1"])')].filter(el=>!el.hasAttribute('disabled')); if(!focusable.length) return; const first=focusable[0]; const last=focusable[focusable.length-1]; if(f.shiftKey && document.activeElement===first){ f.preventDefault(); last.focus(); } else if(!f.shiftKey && document.activeElement===last){ f.preventDefault(); first.focus(); } } }); } if(closeBtn) closeBtn.addEventListener('click', e=>{ e.preventDefault(); closeModal(); }); })(); </script>Learning by example is one of the most effective ways to understand new technology. Geode’s example library includes everything from basic “Hello World” applications to sophisticated production systems handling millions of nodes and relationships. Each example is complete, tested, and documented with explanations of key concepts and design decisions. All examples are maintained in the Geode repository and validated as part of the continuous integration pipeline, ensuring they remain current and functional with each release. Examples cover all supported client libraries (Go, Python, Rust, Node.js, Zig) and demonstrate both basic operations and advanced features like vector search, full-text indexing, and distributed transactions. <h3 id="getting-started-examples" class="position-relative d-flex align-items-center group"> Getting Started Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="getting-started-examples" aria-haspopup="dialog" aria-label="Share link: Getting Started Examples"> Share link </button> </h3> <h4 id="hello-world-your-first-graph" class="position-relative d-flex align-items-center group"> Hello World: Your First Graph <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="hello-world-your-first-graph" aria-haspopup="dialog" aria-label="Share link: Hello World: Your First Graph"> Share link </button> </h4>The simplest possible Geode example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Create your first node CREATE (p:Person {name: 'Alice', age: 30}); -- Query it back MATCH (p:Person {name: 'Alice'}) RETURN p.name, p.age; </code></pre></div>Output: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-fallback" data-lang="fallback">| name | age | |-------|-----| | Alice | 30 | </code></pre></div> <h4 id="basic-crud-operations" class="position-relative d-flex align-items-center group"> Basic CRUD Operations <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="basic-crud-operations" aria-haspopup="dialog" aria-label="Share link: Basic CRUD Operations"> Share link </button> </h4>Complete create, read, update, delete example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Create nodes CREATE (alice:Person {name: 'Alice', email: 'alice@example.com'}); CREATE (bob:Person {name: 'Bob', email: 'bob@example.com'}); -- Create relationship MATCH (a:Person {name: 'Alice'}), (b:Person {name: 'Bob'}) CREATE (a)-[:KNOWS {since: 2020}]->(b); -- Read with pattern matching MATCH (p:Person)-[k:KNOWS]->(f:Person) RETURN p.name, k.since, f.name; -- Update properties MATCH (p:Person {name: 'Alice'}) SET p.age = 31; -- Delete relationship MATCH (p:Person {name: 'Alice'})-[k:KNOWS]->(f) DELETE k; -- Delete node MATCH (p:Person {name: 'Alice'}) DELETE p; </code></pre></div> <h4 id="client-library-examples" class="position-relative d-flex align-items-center group"> Client Library Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="client-library-examples" aria-haspopup="dialog" aria-label="Share link: Client Library Examples"> Share link </button> </h4>Go Example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-go" data-lang="go">package main import ( "context" "database/sql" "fmt" "log" _ "geodedb.com/geode/driver" ) func main() { db, err := sql.Open("geode", "quic://localhost:3141") if err != nil { log.Fatal(err) } defer db.Close() // Create a person _, err = db.ExecContext(context.Background(), "CREATE (p:Person {name: $1, age: $2})", "Alice", 30) if err != nil { log.Fatal(err) } // Query rows, err := db.QueryContext(context.Background(), "MATCH (p:Person {name: $1}) RETURN p.name, p.age", "Alice") if err != nil { log.Fatal(err) } defer rows.Close() for rows.Next() { var name string var age int if err := rows.Scan(&name, &age); err != nil { log.Fatal(err) } fmt.Printf("%s is %d years old\n", name, age) } } </code></pre></div>Python Example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python">import asyncio from geode_client import Client async def main(): client = Client(host="localhost", port=3141) async with client.connection() as conn: # Create a person await conn.execute(""" CREATE (p:Person {name: $name, age: $age}) """, {"name": "Alice", "age": 30}) # Query result, _ = await conn.query(""" MATCH (p:Person {name: $name}) RETURN p.name, p.age """, {"name": "Alice"}) for row in result.rows: print(f"{row['p.name']} is {row['p.age']} years old") asyncio.run(main()) </code></pre></div>Rust Example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-rust" data-lang="rust">use geode_client::{Client, Value}; use std::collections::HashMap; #[tokio::main] async fn main() -> Result<(), Box<dyn std::error::Error>> { let client = Client::from_dsn("localhost:3141")?; let mut conn = client.connect().await?; // Create a person let mut params = HashMap::new(); params.insert("name".to_string(), Value::string("Alice")); params.insert("age".to_string(), Value::int(30)); let _ = conn .query_with_params("CREATE (p:Person {name: $name, age: $age})", &params) .await?; // Query let mut params = HashMap::new(); params.insert("name".to_string(), Value::string("Alice")); let (page, _) = conn .query_with_params("MATCH (p:Person {name: $name}) RETURN p.name, p.age", &params) .await?; for row in &page.rows { println!( \"{} is {} years old\", row.get(\"p.name\").unwrap().as_string()?, row.get(\"p.age\").unwrap().as_int()? ); } Ok(()) } </code></pre></div> <h3 id="real-world-application-examples" class="position-relative d-flex align-items-center group"> Real-World Application Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="real-world-application-examples" aria-haspopup="dialog" aria-label="Share link: Real-World Application Examples"> Share link </button> </h3> <h4 id="social-network" class="position-relative d-flex align-items-center group"> Social Network <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="social-network" aria-haspopup="dialog" aria-label="Share link: Social Network"> Share link </button> </h4>Complete social networking application example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Schema setup CREATE CONSTRAINT unique_email ON :User(email); CREATE INDEX user_name ON :User(name); CREATE INDEX post_timestamp ON :Post(timestamp); -- Create users CREATE (alice:User { name: 'Alice Anderson', email: 'alice@example.com', joined: datetime('2024-01-15') }); CREATE (bob:User { name: 'Bob Brown', email: 'bob@example.com', joined: datetime('2024-02-20') }); -- Create friendships MATCH (a:User {email: 'alice@example.com'}), (b:User {email: 'bob@example.com'}) CREATE (a)-[:FRIENDS_WITH {since: datetime('2024-03-01')}]->(b); -- Alice creates a post MATCH (u:User {email: 'alice@example.com'}) CREATE (u)-[:POSTED]->(p:Post { content: 'Hello from Geode!', timestamp: datetime('2024-03-15T10:30:00'), likes: 0 }); -- Bob likes Alice's post MATCH (u:User {email: 'bob@example.com'}), (p:Post {content: 'Hello from Geode!'}) CREATE (u)-[:LIKES]->(p) SET p.likes = p.likes + 1; -- Find a user's friend's posts (news feed) MATCH (u:User {email: 'bob@example.com'})-[:FRIENDS_WITH]->(f)-[:POSTED]->(p:Post) RETURN f.name, p.content, p.timestamp, p.likes ORDER BY p.timestamp DESC LIMIT 10; </code></pre></div> <h4 id="e-commerce-recommendation-engine" class="position-relative d-flex align-items-center group"> E-Commerce Recommendation Engine <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="e-commerce-recommendation-engine" aria-haspopup="dialog" aria-label="Share link: E-Commerce Recommendation Engine"> Share link </button> </h4>Product recommendation example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Create products CREATE (laptop:Product { id: 'LAPTOP-001', name: 'Pro Laptop 15"', category: 'Electronics', price: 1299.99 }); CREATE (mouse:Product { id: 'MOUSE-001', name: 'Wireless Mouse', category: 'Electronics', price: 29.99 }); -- Create customers CREATE (customer:Customer { id: 'CUST-123', name: 'Jane Doe', email: 'jane@example.com' }); -- Record purchase MATCH (c:Customer {id: 'CUST-123'}), (p:Product {id: 'LAPTOP-001'}) CREATE (c)-[:PURCHASED { date: datetime('2024-03-10'), quantity: 1, price: 1299.99 }]->(p); -- Record view MATCH (c:Customer {id: 'CUST-123'}), (p:Product {id: 'MOUSE-001'}) CREATE (c)-[:VIEWED { timestamp: datetime('2024-03-15T14:30:00') }]->(p); -- Collaborative filtering recommendation -- Find products purchased by customers who bought similar items MATCH (customer:Customer {id: 'CUST-123'})-[:PURCHASED]->(p:Product) MATCH (p)<-[:PURCHASED]-(other:Customer)-[:PURCHASED]->(recommendation:Product) WHERE NOT (customer)-[:PURCHASED]->(recommendation) RETURN recommendation.name, recommendation.price, count(*) as score ORDER BY score DESC LIMIT 5; </code></pre></div> <h4 id="knowledge-graph" class="position-relative d-flex align-items-center group"> Knowledge Graph <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="knowledge-graph" aria-haspopup="dialog" aria-label="Share link: Knowledge Graph"> Share link </button> </h4>Building a knowledge graph example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Create entities CREATE (python:Technology { name: 'Python', type: 'Programming Language', created: 1991 }); CREATE (django:Technology { name: 'Django', type: 'Web Framework', created: 2005 }); CREATE (flask:Technology { name: 'Flask', type: 'Web Framework', created: 2010 }); -- Create relationships MATCH (django:Technology {name: 'Django'}), (python:Technology {name: 'Python'}) CREATE (django)-[:BUILT_WITH]->(python); MATCH (flask:Technology {name: 'Flask'}), (python:Technology {name: 'Python'}) CREATE (flask)-[:BUILT_WITH]->(python); -- Query: Find all frameworks built with Python MATCH (framework:Technology {type: 'Web Framework'})-[:BUILT_WITH]->(lang:Technology {name: 'Python'}) RETURN framework.name, framework.created ORDER BY framework.created; </code></pre></div> <h3 id="advanced-feature-examples" class="position-relative d-flex align-items-center group"> Advanced Feature Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="advanced-feature-examples" aria-haspopup="dialog" aria-label="Share link: Advanced Feature Examples"> Share link </button> </h3> <h4 id="vector-search-example" class="position-relative d-flex align-items-center group"> Vector Search Example <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="vector-search-example" aria-haspopup="dialog" aria-label="Share link: Vector Search Example"> Share link </button> </h4>Semantic search with embeddings: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Create documents with embeddings CREATE (doc1:Document { title: 'Graph Databases Introduction', content: 'Graph databases store data as nodes and relationships...', embedding: [0.1, 0.2, 0.3, ..., 0.9] -- 384-dimensional vector }); CREATE (doc2:Document { title: 'SQL vs NoSQL', content: 'Traditional SQL databases use tables...', embedding: [0.15, 0.25, 0.35, ..., 0.85] }); -- Create vector index CREATE VECTOR INDEX doc_embeddings ON :Document(embedding) WITH (dimension: 384, metric: 'cosine'); -- Semantic search MATCH (doc:Document) WHERE vector_similarity(doc.embedding, $query_embedding) > 0.8 RETURN doc.title, doc.content, vector_similarity(doc.embedding, $query_embedding) as score ORDER BY score DESC LIMIT 10; </code></pre></div> <h4 id="full-text-search-example" class="position-relative d-flex align-items-center group"> Full-Text Search Example <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="full-text-search-example" aria-haspopup="dialog" aria-label="Share link: Full-Text Search Example"> Share link </button> </h4>Text search with BM25 ranking: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Create full-text index CREATE FULLTEXT INDEX article_content ON :Article(title, content); -- Insert articles CREATE (a1:Article { title: 'Getting Started with Geode', content: 'Geode is a graph database aligned with the ISO GQL conformance profile...', published: datetime('2024-01-15') }); -- Search with BM25 ranking MATCH (article:Article) WHERE fulltext_search(article, 'graph database') RETURN article.title, article.published, bm25_score(article) as relevance ORDER BY relevance DESC; </code></pre></div> <h4 id="transaction-example" class="position-relative d-flex align-items-center group"> Transaction Example <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="transaction-example" aria-haspopup="dialog" aria-label="Share link: Transaction Example"> Share link </button> </h4>Complex multi-step transaction: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python">async def transfer_funds(client, from_account, to_account, amount): """Transfer money between accounts atomically""" async with client.connection() as tx: await tx.begin() # Debit from source result, _ = await tx.query(""" MATCH (a:Account {id: $from_id}) WHERE a.balance >= $amount SET a.balance = a.balance - $amount RETURN a.balance """, {"from_id": from_account, "amount": amount}) if not result: await tx.rollback() raise ValueError("Insufficient funds") # Credit to destination await tx.execute(""" MATCH (a:Account {id: $to_id}) SET a.balance = a.balance + $amount """, {"to_id": to_account, "amount": amount}) # Record transaction await tx.execute(""" CREATE (t:Transaction { from: $from_id, to: $to_id, amount: $amount, timestamp: datetime() }) """, { "from_id": from_account, "to_id": to_account, "amount": amount }) await tx.commit() </code></pre></div> <h4 id="graph-algorithms-example" class="position-relative d-flex align-items-center group"> Graph Algorithms Example <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="graph-algorithms-example" aria-haspopup="dialog" aria-label="Share link: Graph Algorithms Example"> Share link </button> </h4>PageRank implementation: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Create web page graph CREATE (home:Page {url: 'example.com', title: 'Home'}); CREATE (about:Page {url: 'example.com/about', title: 'About'}); CREATE (blog:Page {url: 'example.com/blog', title: 'Blog'}); CREATE (contact:Page {url: 'example.com/contact', title: 'Contact'}); -- Create links MATCH (home:Page {title: 'Home'}), (about:Page {title: 'About'}) CREATE (home)-[:LINKS_TO]->(about); MATCH (home:Page {title: 'Home'}), (blog:Page {title: 'Blog'}) CREATE (home)-[:LINKS_TO]->(blog); MATCH (about:Page {title: 'About'}), (contact:Page {title: 'Contact'}) CREATE (about)-[:LINKS_TO]->(contact); MATCH (blog:Page {title: 'Blog'}), (home:Page {title: 'Home'}) CREATE (blog)-[:LINKS_TO]->(home); -- Calculate PageRank MATCH (p:Page) OPTIONAL MATCH (p)<-[:LINKS_TO]-(incoming) WITH p, count(incoming) as inbound_links SET p.pagerank = 0.15 + 0.85 * (inbound_links / 10.0) RETURN p.title, p.pagerank ORDER BY p.pagerank DESC; </code></pre></div> <h3 id="integration-examples" class="position-relative d-flex align-items-center group"> Integration Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="integration-examples" aria-haspopup="dialog" aria-label="Share link: Integration Examples"> Share link </button> </h3> <h4 id="rest-api-integration" class="position-relative d-flex align-items-center group"> REST API Integration <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="rest-api-integration" aria-haspopup="dialog" aria-label="Share link: REST API Integration"> Share link </button> </h4>Building a REST API with Geode backend: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python">from fastapi import FastAPI, HTTPException from geode_client import Client import asyncio app = FastAPI() client = None @app.on_event("startup") async def startup(): global client client = Client(host="localhost", port=3141) @app.get("/users/{user_id}") async def get_user(user_id: str): async with client.connection() as conn: result, _ = await conn.query(""" MATCH (u:User {id: $user_id}) RETURN u """, {"user_id": user_id}) user = result.rows[0]["u"].raw_value if result.rows else None if not user: raise HTTPException(status_code=404, detail="User not found") return user @app.get("/users/{user_id}/friends") async def get_friends(user_id: str): async with client.connection() as conn: result, _ = await conn.query(""" MATCH (u:User {id: $user_id})-[:FRIENDS_WITH]->(f:User) RETURN f.id AS id, f.name AS name, f.email AS email """, {"user_id": user_id}) friends = [ {"id": row["id"].raw_value, "name": row["name"].raw_value, "email": row["email"].raw_value} for row in result.rows ] return {"friends": friends} </code></pre></div> <h4 id="event-streaming-integration" class="position-relative d-flex align-items-center group"> Event Streaming Integration <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="event-streaming-integration" aria-haspopup="dialog" aria-label="Share link: Event Streaming Integration"> Share link </button> </h4>Change data capture example: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python">async def stream_changes(client): """Poll ChangeLog entries for near real-time updates.""" last_seen = "1970-01-01T00:00:00Z" async with client.connection() as conn: while True: result, _ = await conn.query( """ MATCH (e:ChangeLog) WHERE e.emitted_at > $since AND e.label IN $labels RETURN e.operation AS operation, e.label AS label, e.after AS after, e.emitted_at AS emitted_at ORDER BY emitted_at """, {"since": last_seen, "labels": ["User", "Post"]}, ) for row in result.rows: change = { "operation": row["operation"].raw_value, "label": row["label"].raw_value, "data": row["after"].raw_value, } # Push to message queue, webhook, etc. await publish_to_kafka(change) last_seen = row["emitted_at"].raw_value </code></pre></div> <h4 id="machine-learning-integration" class="position-relative d-flex align-items-center group"> Machine Learning Integration <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="machine-learning-integration" aria-haspopup="dialog" aria-label="Share link: Machine Learning Integration"> Share link </button> </h4>Using Geode with scikit-learn: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python">import asyncio import numpy as np from sklearn.cluster import KMeans from geode_client import Client async def cluster_users(): client = Client(host="localhost", port=3141) async with client.connection() as conn: # Fetch user features result, _ = await conn.query(""" MATCH (u:User) RETURN u.id, u.age, u.purchase_count, u.avg_purchase_amount """) users = [] features = [] for row in result.rows: users.append(row["u.id"]) features.append([ row["u.age"], row["u.purchase_count"], row["u.avg_purchase_amount"] ]) # Cluster with k-means X = np.array(features) kmeans = KMeans(n_clusters=3, random_state=42) labels = kmeans.fit_predict(X) # Store cluster assignments back in graph for user_id, cluster in zip(users, labels): await conn.execute(""" MATCH (u:User {id: $user_id}) SET u.cluster = $cluster """, {"user_id": user_id, "cluster": int(cluster)}) asyncio.run(cluster_users()) </code></pre></div> <h3 id="performance-examples" class="position-relative d-flex align-items-center group"> Performance Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="performance-examples" aria-haspopup="dialog" aria-label="Share link: Performance Examples"> Share link </button> </h3> <h4 id="bulk-loading" class="position-relative d-flex align-items-center group"> Bulk Loading <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="bulk-loading" aria-haspopup="dialog" aria-label="Share link: Bulk Loading"> Share link </button> </h4>Efficient data import: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python">async def bulk_load_users(client, users): """Load millions of users efficiently""" batch_size = 5000 for i in range(0, len(users), batch_size): batch = users[i:i + batch_size] # Use UNWIND for batch insertion await client.execute(""" UNWIND $users AS user CREATE (u:User { id: user.id, name: user.name, email: user.email, created: datetime() }) """, {"users": batch}) print(f"Loaded {min(i + batch_size, len(users))} / {len(users)} users") </code></pre></div> <h4 id="query-optimization" class="position-relative d-flex align-items-center group"> Query Optimization <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="query-optimization" aria-haspopup="dialog" aria-label="Share link: Query Optimization"> Share link </button> </h4>Comparing query strategies: <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-gql" data-lang="gql">-- Inefficient: Cartesian product MATCH (p:Person), (c:Company) WHERE p.company_id = c.id RETURN p.name, c.name; -- Efficient: Use relationship MATCH (p:Person)-[:WORKS_AT]->(c:Company) RETURN p.name, c.name; -- Inefficient: No index usage MATCH (p:Person) WHERE p.email = 'alice@example.com' RETURN p; -- Efficient: With index CREATE INDEX person_email ON :Person(email); MATCH (p:Person {email: 'alice@example.com'}) RETURN p; </code></pre></div> <h3 id="testing-examples" class="position-relative d-flex align-items-center group"> Testing Examples <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="testing-examples" aria-haspopup="dialog" aria-label="Share link: Testing Examples"> Share link </button> </h3> <h4 id="unit-testing-with-geode" class="position-relative d-flex align-items-center group"> Unit Testing with Geode <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="unit-testing-with-geode" aria-haspopup="dialog" aria-label="Share link: Unit Testing with Geode"> Share link </button> </h4><div class="highlight"><pre tabindex="0" class="chroma"><code class="language-python" data-lang="python">import pytest from geode_client import Client @pytest.fixture async def client(): client = Client("localhost:3141") await client.connect() yield client # Cleanup await client.execute("MATCH (n) DELETE n") await client.close() @pytest.mark.asyncio async def test_create_user(client): await client.execute(""" CREATE (u:User {name: 'Test User', email: '[email protected]'}) """) result, _ = await client.query(""" MATCH (u:User {email: '[email protected]'}) RETURN count(u) as count """) row = await result.single() assert row["count"] == 1 </code></pre></div> <h3 id="related-topics" class="position-relative d-flex align-items-center group"> Related Topics <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="related-topics" aria-haspopup="dialog" aria-label="Share link: Related Topics"> Share link </button> </h3><ul> <li>Getting Started: Begin your journey with introductory guides</li> <li>Client Libraries: Language-specific integration documentation</li> <li>Query Language: GQL syntax and query patterns</li> <li>Best Practices: Production deployment recommendations</li> <li>Performance: Optimization and tuning guides</li> </ul> <h3 id="further-reading" class="position-relative d-flex align-items-center group"> Further Reading <button type="button" class="h-share btn btn-link p-0 text-decoration-none link-secondary opacity-50 hover-opacity-100 transition-all ms-1" data-share-target="further-reading" aria-haspopup="dialog" aria-label="Share link: Further Reading"> Share link </button> </h3><ul> <li>Tutorial Series: Step-by-step learning path</li> <li>Use Cases: Industry-specific application examples</li> <li>API Reference: Complete client library documentation</li> <li>GitHub Repository: Full example applications and templates</li> <li>Community Forum: Share and discuss example implementations</li> </ul> <hr> Geode’s extensive example library provides practical, tested code demonstrating every feature from basic operations to advanced analytics. All examples are production-ready and maintained alongside the codebase to ensure accuracy and relevance.

Popular

Related Articles

Use Cases