fix: add sqlite edge compound indexes

code-review-graph-vscode/src/backend/sqlite.ts

@@ -208,7 +208,7 @@ export class SqliteReader {
         if (row) {
           const version = parseInt(row.value, 10);
           // Must match LATEST_VERSION in code_review_graph/migrations.py
-          const SUPPORTED_SCHEMA_VERSION = 6;
+          const SUPPORTED_SCHEMA_VERSION = 7;
           if (!isNaN(version) && version > SUPPORTED_SCHEMA_VERSION) {
             return `Database was created with a newer version (schema v${version}). Update the extension.`;
           }

code_review_graph/graph.py

@@ -70,6 +70,8 @@
 CREATE INDEX IF NOT EXISTS idx_edges_source ON edges(source_qualified);
 CREATE INDEX IF NOT EXISTS idx_edges_target ON edges(target_qualified);
 CREATE INDEX IF NOT EXISTS idx_edges_kind ON edges(kind);
+CREATE INDEX IF NOT EXISTS idx_edges_target_kind ON edges(target_qualified, kind);
+CREATE INDEX IF NOT EXISTS idx_edges_source_kind ON edges(source_qualified, kind);
 CREATE INDEX IF NOT EXISTS idx_edges_file ON edges(file_path);
 """
 

code_review_graph/migrations.py

@@ -203,6 +203,19 @@ def _migrate_v6(conn: sqlite3.Connection) -> None:
                 "(community_summaries, flow_snapshots, risk_index)")
 
 
+def _migrate_v7(conn: sqlite3.Connection) -> None:
+    """v7: Add compound edge indexes for summary and risk queries."""
+    conn.execute(
+        "CREATE INDEX IF NOT EXISTS idx_edges_target_kind "
+        "ON edges(target_qualified, kind)"
+    )
+    conn.execute(
+        "CREATE INDEX IF NOT EXISTS idx_edges_source_kind "
+        "ON edges(source_qualified, kind)"
+    )
+    logger.info("Migration v7: added compound edge indexes")
+
+
 # ---------------------------------------------------------------------------
 # Migration registry
 # ---------------------------------------------------------------------------
@@ -213,6 +226,7 @@ def _migrate_v6(conn: sqlite3.Connection) -> None:
     4: _migrate_v4,
     5: _migrate_v5,
     6: _migrate_v6,
+    7: _migrate_v7,
 }
 
 LATEST_VERSION = max(MIGRATIONS.keys())

tests/test_migrations.py

@@ -134,6 +134,14 @@ def test_v6_migration_idempotent(self):
         tables = _get_table_names(self.store._conn)
         assert "community_summaries" in tables
 
+    def test_v7_compound_edge_indexes_exist(self):
+        """v7 compound edge indexes should exist after migration."""
+        rows = self.store._conn.execute("PRAGMA index_list(edges)").fetchall()
+        indexes = {row[1] if isinstance(row, tuple) else row["name"] for row in rows}
+
+        assert "idx_edges_target_kind" in indexes
+        assert "idx_edges_source_kind" in indexes
+
 
 def _get_table_names(conn: sqlite3.Connection) -> set[str]:
     """Helper: return all table/view names in the database."""