Searching PostgreSQL Full-Text Indexes from PHP

Search PostgreSQL tsvector columns using tsquery and ranked matches.

The objective is to understand the behavior and operational limits, not only the method name.

What It Does

Search PostgreSQL tsvector columns using tsquery and ranked matches.

Prerequisites

Use a dedicated development environment and sample data. Where a snippet uses an injected connection, repository, request value or mailer, supply it from your own application setup.

Example 1: Basic Use

A focused working pattern for this topic. Names such as $pdo, $authContext and $repo represent dependencies provided by the application unless initialized in the snippet.

<?php
$stmt = $pdo->prepare("SELECT id, title FROM documents WHERE search_vector @@ plainto_tsquery('english', :q) ORDER BY ts_rank(search_vector, plainto_tsquery('english', :q)) DESC LIMIT 20");
$stmt->execute(['q' => $searchTerm]);
$matches = $stmt->fetchAll(PDO::FETCH_ASSOC);

Example 2: A Second Scenario

A second use case that adds a different operation or data flow specific to this topic.

<?php
$stmt = $pdo->prepare("SELECT id, ts_rank(search_vector, plainto_tsquery('english', :term)) AS rank FROM documents WHERE search_vector @@ plainto_tsquery('english', :term) ORDER BY rank DESC LIMIT 10");
$stmt->execute(['term' => $term]);
foreach ($stmt as $row) echo $row['id'] . ':' . $row['rank'];

Example 3: Practical Checks

A practical validation, failure or deployment concern specific to this topic.

<?php
$pdo->exec('CREATE INDEX IF NOT EXISTS doc_search_idx ON documents USING GIN(search_vector)');
$plan = $pdo->prepare("EXPLAIN SELECT id FROM documents WHERE search_vector @@ plainto_tsquery('english', ?)");
$plan->execute([$term]); foreach ($plan as $row) echo implode(' ', $row);

Important Behavior and Edge Cases

Maintain a GIN index for large datasets and pass user search strings as parameters.

For production use, also account for error handling, data validation, resource limits and environment-specific driver behavior.

Comparison with Related Approaches

Common Beginner Mistakes

Key Takeaways

• Search PostgreSQL tsvector columns using tsquery and ranked matches.
• Maintain a GIN index for large datasets and pass user search strings as parameters.
• Use this workflow as a focused starting point rather than a substitute for application-level tests.

Choose this API or pattern when its exact semantics match your task, and verify the result against the database driver and runtime used by your application.