feat(example): add and update examples

Author: levydsa

Examples/SimpleQuery/main.swift Examples/Query/main.swift

@@ -2,10 +2,13 @@
 import Foundation
 import Libsql
 
-let db = try Libsql.Database(":memory:")
+let db = try Database(":memory:")
 let conn = try db.connect()
 
-_ = try conn.execute("create table users(id integer primary key autoincrement, name text)")
+_ = try conn.executeBatch("""
+    create table users(id integer primary key autoincrement, name text);
+    insert into users (name) values ('Iku Turso');
+""")
 
 let forenames = ["John", "Mary", "Alice", "Mark"]
 let surnames = ["Doe", "Smith", "Jones", "Taylor"]
@@ -14,8 +17,8 @@ for forename in forenames {
     for surname in surnames {
         _ = try conn.execute(
             "insert into users (name) values (?)",
-            ["\(forename) \(surname)"
-        ]);
+            ["\(forename) \(surname)"]
+        );
     }
 }
 

Examples/Transaction/main.swift

@@ -0,0 +1,34 @@
+
+import Foundation
+import Libsql
+
+let db = try Database(":memory:")
+let conn = try db.connect()
+
+_ = try conn.executeBatch("""
+    create table users(id integer primary key autoincrement, name text);
+    insert into users (name) values ('Iku Turso');
+""")
+
+let tx = try conn.transaction();
+
+let forenames = ["John", "Mary", "Alice", "Mark"]
+let surnames = ["Doe", "Smith", "Jones", "Taylor"]
+
+for forename in forenames {
+    for surname in surnames {
+        _ = try tx.execute(
+            "insert into users (name) values (?)",
+            ["\(forename) \(surname)"]
+        );
+    }
+}
+
+tx.rollback() // Discards all inserts
+
+
+// Only returns "1 Iku turso", since the transaction was rollbacked.
+for row in try conn.query("select * from users", [1]) {
+    print(try row.getInt(0), try row.getString(1))
+}
+

Examples/Vector/main.swift

@@ -0,0 +1,28 @@
+
+import Foundation
+import Libsql
+
+let db = try Database(":memory:")
+let conn = try db.connect()
+
+try conn.executeBatch("""
+    DROP TABLE IF EXISTS movies;
+    CREATE TABLE movies (title TEXT, year INT, embedding F32_BLOB(3));
+    CREATE INDEX movies_idx ON movies (libsql_vector_idx(embedding));
+    INSERT INTO movies (title, year, embedding) VALUES
+        ('Napoleon', 2023, vector32('[1,2,3]')),
+        ('Black Hawk Down', 2001, vector32('[10,11,12]')),
+        ('Gladiator', 2000, vector32('[7,8,9]')),
+        ('Blade Runner', 1982, vector32('[4,5,6]'));
+""")
+
+let rows = try conn.query("""
+  SELECT title, year
+  FROM vector_top_k('movies_idx', '[4,5,6]', 3)
+  JOIN movies ON movies.rowid = id
+""")
+
+for row in rows {
+    print(try row.get(0), try row.get(1))
+}
+

Package.swift

@@ -11,7 +11,9 @@ var package = Package(
         .library(name: "Libsql", targets: ["Libsql"]),
 
         // Examples
-        .executable(name: "SimpleQuery", targets: ["SimpleQuery"])
+        .executable(name: "Query", targets: ["Query"]),
+        .executable(name: "Transaction", targets: ["Transaction"]),
+        .executable(name: "Vector", targets: ["Vector"]),
     ],
     targets: [
         .target(name: "Libsql", dependencies: ["CLibsql"]),
@@ -20,9 +22,19 @@ var package = Package(
 
         // Examples
         .executableTarget(
-            name: "SimpleQuery",
+            name: "Query",
             dependencies: ["Libsql"],
-            path: "Examples/SimpleQuery"
+            path: "Examples/Query"
+        ),
+        .executableTarget(
+            name: "Transaction",
+            dependencies: ["Libsql"],
+            path: "Examples/Transaction"
+        ),
+        .executableTarget(
+            name: "Vector",
+            dependencies: ["Libsql"],
+            path: "Examples/Vector"
         ),
     ]
 )