fix(@angular/cli): correct query in find_examples to prevent runtime error

This commit fixes a runtime error in the `find_examples` tool that occurred when filtering examples. The error `no such column: experimental` was caused by an incorrect SQL query that attempted to access a column on the FTS virtual table (`examples_fts`) that only exists on the main content table (`examples`). The fix refactors the database query to use a `JOIN` between the `examples` and `examples_fts` tables. This allows the `WHERE` clause to correctly filter on the `experimental` column from the main table while still leveraging the full-text search capabilities of the virtual table.

Author: clydin

packages/angular/cli/src/commands/mcp/tools/examples.ts

@@ -339,11 +339,11 @@ function queryDatabase(db: DatabaseSync, input: FindExampleInput) {
  // Build the query dynamically
  const params: SQLInputValue[] = [];
  let sql =
- 'SELECT title, summary, keywords, required_packages, related_concepts, related_tools, content, ' +
+ `SELECT e.title, e.summary, e.keywords, e.required_packages, e.related_concepts, e.related_tools, e.content, ` +
  // The `snippet` function generates a contextual snippet of the matched text.
  // Column 6 is the `content` column. We highlight matches with asterisks and limit the snippet size.
  "snippet(examples_fts, 6, '**', '**', '...', 15) AS snippet " +
- 'FROM examples_fts';
+ 'FROM examples e JOIN examples_fts ON e.id = examples_fts.rowid';
  const whereClauses = [];
 
  // FTS query
@@ -356,7 +356,7 @@ function queryDatabase(db: DatabaseSync, input: FindExampleInput) {
  const addJsonFilter = (column: string, values: string[] | undefined) => {
  if (values?.length) {
  for (const value of values) {
- whereClauses.push(`${column} LIKE ?`);
+ whereClauses.push(`e.${column} LIKE ?`);
  params.push(`%"${value}"%`);
  }
  }
@@ -367,7 +367,7 @@ function queryDatabase(db: DatabaseSync, input: FindExampleInput) {
  addJsonFilter('related_concepts', related_concepts);
 
  if (!includeExperimental) {
- whereClauses.push('experimental = 0');
+ whereClauses.push('e.experimental = 0');
  }
 
  if (whereClauses.length > 0) {