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package test
import (
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/yyun543/minidb/internal/catalog"
"github.com/yyun543/minidb/internal/delta"
"github.com/yyun543/minidb/internal/executor"
"github.com/yyun543/minidb/internal/optimizer"
"github.com/yyun543/minidb/internal/parser"
"github.com/yyun543/minidb/internal/session"
"github.com/yyun543/minidb/internal/storage"
)
// TestTimeTravelQueries tests Delta Lake time travel capabilities
func TestTimeTravelQueries(t *testing.T) {
storageEngine, err := storage.NewParquetEngine(SetupTestDir(t, "time_travel_test"))
assert.NoError(t, err)
defer storageEngine.Close()
err = storageEngine.Open()
assert.NoError(t, err)
cat := catalog.NewCatalog()
cat.SetStorageEngine(storageEngine)
err = cat.Init()
assert.NoError(t, err)
sessMgr, err := session.NewSessionManager()
assert.NoError(t, err)
sess := sessMgr.CreateSession()
opt := optimizer.NewOptimizer()
exec := executor.NewExecutor(cat)
// Setup database
createDbSQL := "CREATE DATABASE timetravel_test"
stmt, err := parser.Parse(createDbSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
sess.CurrentDB = "timetravel_test"
t.Run("VersionBasedTimeTravel", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE history (id INTEGER, value VARCHAR, version INTEGER)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Insert data at version 1
insertSQL := "INSERT INTO history VALUES (1, 'v1', 1)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
time.Sleep(50 * time.Millisecond)
// Insert data at version 2
insertSQL = "INSERT INTO history VALUES (2, 'v2', 2)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
time.Sleep(50 * time.Millisecond)
// Insert data at version 3
insertSQL = "INSERT INTO history VALUES (3, 'v3', 3)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Query latest version - should have all 3 records
selectSQL := "SELECT * FROM history"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.Equal(t, 3, len(result.Batches()), "Latest version should have all 3 records")
})
t.Run("SnapshotIsolation", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE snapshots (id INTEGER, data VARCHAR)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Record timestamps for each insert
timestamps := make([]int64, 0)
// Insert 1
timestamps = append(timestamps, time.Now().UnixMilli())
insertSQL := "INSERT INTO snapshots VALUES (1, 'snapshot1')"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
time.Sleep(100 * time.Millisecond)
// Insert 2
timestamps = append(timestamps, time.Now().UnixMilli())
insertSQL = "INSERT INTO snapshots VALUES (2, 'snapshot2')"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
time.Sleep(100 * time.Millisecond)
// Insert 3
timestamps = append(timestamps, time.Now().UnixMilli())
insertSQL = "INSERT INTO snapshots VALUES (3, 'snapshot3')"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Current query should show all records
selectSQL := "SELECT * FROM snapshots"
stmt, err = parser.Parse(selectSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.Equal(t, 3, len(result.Batches()), "Current snapshot should have all records")
// Timestamps available for potential time-travel queries
assert.Equal(t, 3, len(timestamps), "Should have recorded 3 timestamps")
})
t.Run("DeltaLogVersionTracking", func(t *testing.T) {
// Get direct access to Delta Log for version testing
// storageEngine is already *ParquetEngine, no type assertion needed
deltaLog := storageEngine.GetDeltaLog()
assert.NotNil(t, deltaLog, "Delta Log should be available")
// Check current version
currentVersion := deltaLog.GetLatestVersion()
assert.Greater(t, currentVersion, int64(0), "Should have versions from previous operations")
// Create new table to increment version
createSQL := "CREATE TABLE version_test (id INTEGER)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Insert data
insertSQL := "INSERT INTO version_test VALUES (1)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Version should have incremented
newVersion := deltaLog.GetLatestVersion()
assert.Greater(t, newVersion, currentVersion, "Version should increment after insert")
})
}
// TestDeltaLogSnapshotRetrieval tests snapshot retrieval at different versions
func TestDeltaLogSnapshotRetrieval(t *testing.T) {
storageEngine, err := storage.NewParquetEngine(SetupTestDir(t, "snapshot_retrieval_test"))
assert.NoError(t, err)
defer storageEngine.Close()
err = storageEngine.Open()
assert.NoError(t, err)
// storageEngine is already *ParquetEngine, no type assertion needed
deltaLog := storageEngine.GetDeltaLog()
assert.NotNil(t, deltaLog)
cat := catalog.NewCatalog()
cat.SetStorageEngine(storageEngine)
err = cat.Init()
assert.NoError(t, err)
sessMgr, err := session.NewSessionManager()
assert.NoError(t, err)
sess := sessMgr.CreateSession()
opt := optimizer.NewOptimizer()
exec := executor.NewExecutor(cat)
// Setup
createDbSQL := "CREATE DATABASE snapshot_db"
stmt, err := parser.Parse(createDbSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
sess.CurrentDB = "snapshot_db"
t.Run("SnapshotAtVersion", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE events (id INTEGER, event VARCHAR)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
tableID := "snapshot_db.events"
// Insert events and track versions
versions := make([]int64, 0)
for i := 1; i <= 5; i++ {
stmt, err = parser.Parse("INSERT INTO events VALUES (1, 'event')")
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
currentVersion := deltaLog.GetLatestVersion()
versions = append(versions, currentVersion)
time.Sleep(20 * time.Millisecond)
}
// Get snapshot at latest version
snapshot, err := deltaLog.GetSnapshot(tableID, -1)
assert.NoError(t, err)
assert.NotNil(t, snapshot)
assert.Equal(t, 5, len(snapshot.Files), "Latest snapshot should have all 5 files")
// Get snapshot at earlier version (if we have version tracking)
if len(versions) > 2 {
earlierVersion := versions[1]
snapshot, err = deltaLog.GetSnapshot(tableID, earlierVersion)
assert.NoError(t, err)
assert.NotNil(t, snapshot)
// Earlier snapshot should have fewer files
assert.LessOrEqual(t, len(snapshot.Files), 5, "Earlier snapshot should have <= files")
}
})
t.Run("SnapshotMetadata", func(t *testing.T) {
// Create table with schema
createSQL := "CREATE TABLE metadata_test (id INTEGER, name VARCHAR, value INTEGER)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Insert data
insertSQL := "INSERT INTO metadata_test VALUES (1, 'test', 100)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Get snapshot
tableID := "snapshot_db.metadata_test"
snapshot, err := deltaLog.GetSnapshot(tableID, -1)
assert.NoError(t, err)
assert.NotNil(t, snapshot)
// Verify snapshot properties
assert.NotZero(t, snapshot.Version, "Snapshot should have version")
assert.NotZero(t, snapshot.Timestamp, "Snapshot should have timestamp")
assert.Equal(t, tableID, snapshot.TableID, "Snapshot should have correct table ID")
assert.Greater(t, len(snapshot.Files), 0, "Snapshot should have files")
})
t.Run("TimestampBasedQuery", func(t *testing.T) {
// Create table
createSQL := "CREATE TABLE time_based (id INTEGER, ts INTEGER)"
stmt, err := parser.Parse(createSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
tableID := "snapshot_db.time_based"
timestamp1 := time.Now().UnixMilli()
// Insert 1
insertSQL := "INSERT INTO time_based VALUES (1, 100)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
time.Sleep(100 * time.Millisecond)
timestamp2 := time.Now().UnixMilli()
// Insert 2
insertSQL = "INSERT INTO time_based VALUES (2, 200)"
stmt, err = parser.Parse(insertSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// Get version at timestamp1
version1, err := deltaLog.GetVersionByTimestamp(tableID, timestamp1)
if err == nil {
assert.Greater(t, version1, int64(0), "Should find version at timestamp1")
}
// Get version at timestamp2
version2, err := deltaLog.GetVersionByTimestamp(tableID, timestamp2)
if err == nil {
assert.GreaterOrEqual(t, version2, version1, "Version2 should be >= version1")
}
})
}
// TestDeltaLogFileTracking tests ADD and REMOVE operations
func TestDeltaLogFileTracking(t *testing.T) {
deltaLog := delta.NewDeltaLog()
err := deltaLog.Bootstrap()
assert.NoError(t, err)
tableID := "test_db.test_table"
t.Run("AddFileTracking", func(t *testing.T) {
// Add files
for i := 1; i <= 3; i++ {
file := &delta.ParquetFile{
Path: "file" + string(rune('0'+i)) + ".parquet",
Size: 1000,
RowCount: 100,
Stats: &delta.FileStats{
RowCount: 100,
MinValues: map[string]interface{}{"id": 1},
MaxValues: map[string]interface{}{"id": 100},
NullCounts: map[string]int64{"id": 0},
},
}
err := deltaLog.AppendAdd(tableID, file)
assert.NoError(t, err)
}
// Get snapshot
snapshot, err := deltaLog.GetSnapshot(tableID, -1)
assert.NoError(t, err)
assert.Equal(t, 3, len(snapshot.Files), "Should have 3 files")
})
t.Run("RemoveFileTracking", func(t *testing.T) {
// Remove a file
err := deltaLog.AppendRemove(tableID, "file1.parquet")
assert.NoError(t, err)
// Get updated snapshot
snapshot, err := deltaLog.GetSnapshot(tableID, -1)
assert.NoError(t, err)
assert.Equal(t, 2, len(snapshot.Files), "Should have 2 files after removal")
})
t.Run("ListTables", func(t *testing.T) {
tables := deltaLog.ListTables()
assert.Contains(t, tables, tableID, "Should list the test table")
})
}