drizzle 0.1.14

A type-safe SQL query builder for Rust
Documentation 
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//! PostgreSQL Prepared Statement tests
//!
//! Integration tests that verify prepared statement execution with PostgreSQL databases.

#![cfg(any(feature = "postgres-sync", feature = "tokio-postgres"))]

use crate::common::schema::postgres::*;
use drizzle::core::expr::*;
use drizzle::postgres::prelude::*;

#[drizzle::test]
fn test_prepare_with_placeholder(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    db.insert(simple)
        .values([InsertSimple::new("Alice"), InsertSimple::new("Bob")])
        .execute();

    // Create a prepared statement with typed placeholder and convert to owned to release borrow
    let name = simple.name.placeholder("name");
    let prepared = db
        .select((simple.id, simple.name))
        .from(simple)
        .r#where(eq(simple.name, name))
        .prepare()
        .into_owned();

    // Execute the prepared statement with bound parameter
    let result: Vec<SelectSimple> = prepared.all(drizzle_client!(), [name.bind("Alice")]);

    assert_eq!(result.len(), 1);
    assert_eq!(result[0].name, "Alice");
}

#[drizzle::test]
fn test_prepare_reuse_with_different_params(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    db.insert(simple)
        .values([
            InsertSimple::new("Alice"),
            InsertSimple::new("Bob"),
            InsertSimple::new("Charlie"),
        ])
        .execute();

    // Create a prepared statement once
    let name = simple.name.placeholder("name");
    let prepared = db
        .select((simple.id, simple.name))
        .from(simple)
        .r#where(eq(simple.name, name))
        .prepare()
        .into_owned();

    // Execute with different parameter values
    let alice: Vec<SelectSimple> = prepared.all(drizzle_client!(), [name.bind("Alice")]);
    assert_eq!(alice.len(), 1);
    assert_eq!(alice[0].name, "Alice");

    let bob: Vec<SelectSimple> = prepared.all(drizzle_client!(), [name.bind("Bob")]);
    assert_eq!(bob.len(), 1);
    assert_eq!(bob[0].name, "Bob");

    let charlie: Vec<SelectSimple> = prepared.all(drizzle_client!(), [name.bind("Charlie")]);
    assert_eq!(charlie.len(), 1);
    assert_eq!(charlie[0].name, "Charlie");
}

#[drizzle::test]
fn test_prepared_get_single_row(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    db.insert(simple)
        .values([InsertSimple::new("UniqueUser")])
        .execute();

    let name = simple.name.placeholder("name");
    let prepared = db
        .select((simple.id, simple.name))
        .from(simple)
        .r#where(eq(simple.name, name))
        .prepare()
        .into_owned();

    // Use get to retrieve a single row
    let result: SelectSimple = prepared.get(drizzle_client!(), [name.bind("UniqueUser")]);

    assert_eq!(result.name, "UniqueUser");
}

#[drizzle::test]
fn test_prepared_missing_named_param_fails(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    db.insert(simple)
        .values([InsertSimple::new("Alice")])
        .execute();

    let name = simple.name.placeholder("name");
    // Passing 0 params to a query with 1 placeholder should fail:
    // - In debug builds: debug_assert panics on param count mismatch
    // - In release builds: bind() returns ParameterError
    let prepared = db
        .select((simple.id, simple.name))
        .from(simple)
        .r#where(eq(simple.name, name))
        .prepare()
        .into_owned();

    let result = catch!(prepared.all::<SelectSimple, 0>(drizzle_client!(), []));
    match result {
        Err(_) => {} // debug_assert panic — expected in debug builds
        Ok(Err(drizzle::error::DrizzleError::ParameterError(_))) => {} // bind error — expected in release builds
        other => panic!("expected param mismatch failure, got: {other:?}"),
    }
}

#[drizzle::test]
fn test_prepared_extra_named_param_fails(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    db.insert(simple)
        .values([InsertSimple::new("Alice")])
        .execute();

    let name = simple.name.placeholder("name");
    let extra = simple.name.placeholder("extra");

    // Passing 2 params to a query with 1 placeholder should fail:
    // - In debug builds: debug_assert panics on param count mismatch
    // - In release builds: bind() returns ParameterError
    let prepared = db
        .select((simple.id, simple.name))
        .from(simple)
        .r#where(eq(simple.name, name))
        .prepare()
        .into_owned();

    let result = catch!(prepared.all::<SelectSimple, 2>(
        drizzle_client!(),
        [name.bind("Alice"), extra.bind("ignored")],
    ));
    match result {
        Err(_) => {} // debug_assert panic — expected in debug builds
        Ok(Err(drizzle::error::DrizzleError::ParameterError(_))) => {} // bind error — expected in release builds
        other => panic!("expected param mismatch failure, got: {other:?}"),
    }
}

#[drizzle::test]
fn test_prepared_execute_insert(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    // Prepare an insert with values baked in and convert to owned
    let insert_data = InsertSimple::new("PreparedInsert");
    let prepared = db
        .insert(simple)
        .values([insert_data])
        .prepare()
        .into_owned();

    // Execute the prepared insert
    prepared.execute(drizzle_client!(), []);

    // Verify the insert worked
    let results: Vec<SelectSimple> = db
        .select((simple.id, simple.name))
        .from(simple)
        .r#where(eq(simple.name, "PreparedInsert"))
        .all();

    assert_eq!(results.len(), 1);
    assert_eq!(results[0].name, "PreparedInsert");
}

#[drizzle::test]
fn test_prepared_select_all_no_params(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    db.insert(simple)
        .values([
            InsertSimple::new("User1"),
            InsertSimple::new("User2"),
            InsertSimple::new("User3"),
        ])
        .execute();

    // Prepared statement without placeholders - convert to owned
    let prepared = db
        .select((simple.id, simple.name))
        .from(simple)
        .prepare()
        .into_owned();

    let results: Vec<SelectSimple> = prepared.all(drizzle_client!(), []);

    assert_eq!(results.len(), 3);
}

#[drizzle::test]
fn test_prepared_owned_conversion(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    db.insert(simple)
        .values([InsertSimple::new("OwnedTest")])
        .execute();

    // Create a prepared statement and convert to owned
    let name = simple.name.placeholder("name");
    let owned = db
        .select((simple.id, simple.name))
        .from(simple)
        .r#where(eq(simple.name, name))
        .prepare()
        .into_owned();

    // Owned statement can be stored and reused
    let result: Vec<SelectSimple> = owned.all(drizzle_client!(), [name.bind("OwnedTest")]);

    assert_eq!(result.len(), 1);
    assert_eq!(result[0].name, "OwnedTest");
}

#[drizzle::test]
fn test_prepared_performance_comparison(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    // Insert test data
    let test_data: Vec<_> = (0..100)
        .map(|i| InsertSimple::new(format!("User{}", i)))
        .collect();
    db.insert(simple).values(test_data).execute();

    // Test regular query performance
    let start = std::time::Instant::now();
    for i in 0..10 {
        let _results: Vec<SelectSimple> = db
            .select(())
            .from(simple)
            .r#where(eq(simple.name, format!("User{}", i)))
            .all();
    }
    let regular_duration = start.elapsed();

    // Test prepared statement performance
    let name = simple.name.placeholder("name");
    let prepared = db
        .select(())
        .from(simple)
        .r#where(eq(simple.name, name))
        .prepare()
        .into_owned();

    let start = std::time::Instant::now();
    for i in 0..10 {
        let _results: Vec<SelectSimple> =
            prepared.all(drizzle_client!(), [name.bind(format!("User{}", i))]);
    }
    let prepared_duration = start.elapsed();

    // Prepared statements shouldn't be significantly slower
    assert!(
        prepared_duration <= regular_duration * 3,
        "Prepared statements shouldn't be significantly slower"
    );
}

#[drizzle::test]
fn test_prepared_insert_multiple_times(db: &mut TestDb<SimpleSchema>) {
    let SimpleSchema { simple } = schema;

    // Create prepared inserts with different values
    for i in 0..5 {
        let insert_data = InsertSimple::new(format!("BatchUser{}", i));
        let prepared = db
            .insert(simple)
            .values([insert_data])
            .prepare()
            .into_owned();
        prepared.execute(drizzle_client!(), []);
    }

    // Verify all inserts worked
    let results: Vec<SelectSimple> = db.select((simple.id, simple.name)).from(simple).all();

    assert_eq!(results.len(), 5);
    for i in 0..5 {
        assert!(results.iter().any(|r| r.name == format!("BatchUser{}", i)));
    }
}