[12.x] Add tsvector column type for PostgreSQL

[milroyfraser]

Summary

Adds a tsvector() column type method to Blueprint and the corresponding type handler in PostgresGrammar. This allows creating PostgreSQL tsvector columns using the fluent schema builder instead of raw DB::statement() calls.

Motivation

PostgreSQL's tsvector type is essential for full-text search. Currently, creating tsvector columns (especially generated ones with storedAs()) requires raw SQL:

DB::statement("
    ALTER TABLE articles
    ADD COLUMN search_vector tsvector
    GENERATED ALWAYS AS (
        setweight(to_tsvector('english', coalesce(title, '')), 'A') ||
        setweight(to_tsvector('english', coalesce(body, '')), 'B')
    ) STORED
");

With this PR, the same can be expressed fluently:

Schema::table('articles', function (Blueprint $table) {
    $table->tsvector('search_vector')->nullable()->storedAs(
        "setweight(to_tsvector('english', coalesce(title, '')), 'A') || " .
        "setweight(to_tsvector('english', coalesce(body, '')), 'B')"
    );
});

This follows the same pattern as the existing vector() column type.

Changes

• Blueprint::tsvector() — adds column of type tsvector
• PostgresGrammar::typeTsvector() — returns the tsvector SQL type string
• 3 new test cases in DatabasePostgresSchemaGrammarTest

🤖 Generated with Claude Code