fix(vnext): authenticate relation continuations

Author: Light2Dark

src/vnext/__tests__/query-site.bench.ts

@@ -11,6 +11,10 @@ import {
 } from "../statement-index.js";
 
 const dialect: SqlQuerySiteDialect = {
+  classifyRelationAlias: (rawAlias) => ({
+    status: "identifier",
+    value: rawAlias,
+  }),
   decodeRelationPath: (rawPath, cursorOffset) => ({
     finalSegment: { from: 0, to: rawPath.length },
     prefix: {
@@ -23,6 +27,7 @@ const dialect: SqlQuerySiteDialect = {
   }),
   lexicalProfile: DUCKDB_SQL_LEXICAL_PROFILE,
   maximumPathDepth: 16,
+  supportsNaturalJoin: true,
 };
 const tenKilobyteQuery = `SELECT ${Array.from(
   { length: 1_100 },
@@ -35,9 +40,33 @@ const index = buildSqlStatementIndex(
 );
 const position = tenKilobyteQuery.length;
 const slot = findSqlStatementSlot(index, position, "left");
+const aliasHeavyQuery = `SELECT * FROM ${Array.from(
+  { length: 1_000 },
+  (_, aliasIndex) => `table_name alias_${aliasIndex}`,
+).join(", ")}, `;
+const aliasHeavySource = createIdentitySqlSource(aliasHeavyQuery);
+const aliasHeavyIndex = buildSqlStatementIndex(
+  aliasHeavySource.analysisText,
+  dialect.lexicalProfile,
+);
+const aliasHeavyPosition = aliasHeavyQuery.length;
+const aliasHeavySlot = findSqlStatementSlot(
+  aliasHeavyIndex,
+  aliasHeavyPosition,
+  "left",
+);
 
 describe("query-site recognizer", () => {
   bench("10 KiB active statement", () => {
     recognizeSqlRelationQuerySite(source, slot, position, dialect);
   });
+
+  bench("1,000 classified aliases", () => {
+    recognizeSqlRelationQuerySite(
+      aliasHeavySource,
+      aliasHeavySlot,
+      aliasHeavyPosition,
+      dialect,
+    );
+  });
 });