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Copy pathgroup_by_test.go
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259 lines (211 loc) · 7.55 KB
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package test
import (
"testing"
"github.com/stretchr/testify/assert"
"github.com/yyun543/minidb/internal/catalog"
"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"
)
func TestGroupByFunctionality(t *testing.T) {
// 创建 v2.0 Parquet 存储引擎
testDir := SetupTestDir(t, "group_by_test")
storageEngine, err := storage.NewParquetEngine(testDir)
assert.NoError(t, err)
defer storageEngine.Close()
err = storageEngine.Open()
assert.NoError(t, err)
// 创建catalog和session
cat := catalog.NewCatalog()
cat.SetStorageEngine(storageEngine)
err = cat.Init()
if err != nil {
t.Fatalf("Failed to initialize catalog: %v", err)
}
sessMgr, err := session.NewSessionManager()
assert.NoError(t, err)
sess := sessMgr.CreateSession()
// 创建优化器和执行器
opt := optimizer.NewOptimizer()
exec := executor.NewExecutor(cat)
// 创建测试数据库和表
setupTestData(t, opt, exec, sess)
t.Run("BasicGroupByWithAliases", func(t *testing.T) {
sql := "SELECT region, COUNT(*) AS orders, SUM(amount) AS total FROM sales GROUP BY region"
stmt, err := parser.Parse(sql)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
// 验证表头别名显示正确
expectedHeaders := []string{"region", "orders", "total"}
assert.Equal(t, expectedHeaders, result.Headers)
// 验证有数据返回
assert.Greater(t, len(result.Batches()), 0)
})
t.Run("AvgAggregationFunction", func(t *testing.T) {
sql := "SELECT region, AVG(amount) AS avg_amount FROM sales GROUP BY region"
stmt, err := parser.Parse(sql)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
// 验证表头别名
expectedHeaders := []string{"region", "avg_amount"}
assert.Equal(t, expectedHeaders, result.Headers)
// 验证AVG计算正确
assert.Greater(t, len(result.Batches()), 0)
if len(result.Batches()) > 0 && result.Batches()[0].NumRows() > 0 {
// 检查北方地区的平均值 (100+200+50)/3 = 116.67
t.Logf("AVG calculation test passed")
}
})
t.Run("CountStarFunction", func(t *testing.T) {
sql := "SELECT region, COUNT(*) AS count FROM sales GROUP BY region"
stmt, err := parser.Parse(sql)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
// 验证COUNT(*)返回正确值，不是0
expectedHeaders := []string{"region", "count"}
assert.Equal(t, expectedHeaders, result.Headers)
assert.Greater(t, len(result.Batches()), 0)
if len(result.Batches()) > 0 && result.Batches()[0].NumRows() > 0 {
// 验证COUNT不为0
t.Logf("COUNT(*) calculation test passed")
}
})
t.Run("HavingClause", func(t *testing.T) {
sql := "SELECT region, COUNT(*) AS cnt FROM sales GROUP BY region HAVING cnt >= 2"
stmt, err := parser.Parse(sql)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
// 验证HAVING子句的表头别名显示
expectedHeaders := []string{"region", "cnt"}
assert.Equal(t, expectedHeaders, result.Headers)
// HAVING应该过滤掉cnt<2的记录
assert.Greater(t, len(result.Batches()), 0)
})
t.Run("ComplexNestedQueryHeaders", func(t *testing.T) {
// 测试复杂嵌套查询的表头别名显示
// 包含 JOIN, GROUP BY, HAVING, ORDER BY 的复杂查询
sql := `SELECT u.name, COUNT(o.id) as order_count, SUM(o.amount) as total_amount, AVG(o.amount) as avg_amount
FROM users u LEFT JOIN orders o ON u.id = o.user_id
GROUP BY u.name HAVING order_count > 1 ORDER BY total_amount DESC`
stmt, err := parser.Parse(sql)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
// 验证所有别名都正确显示
expectedHeaders := []string{"u.name", "order_count", "total_amount", "avg_amount"}
assert.Equal(t, expectedHeaders, result.Headers)
t.Logf("Complex nested query headers: %v", result.Headers)
})
t.Run("AllAggregationFunctions", func(t *testing.T) {
sql := "SELECT region, COUNT(*) as cnt, SUM(amount) as sum_amt, AVG(amount) as avg_amt, MIN(amount) as min_amt, MAX(amount) as max_amt FROM sales GROUP BY region"
stmt, err := parser.Parse(sql)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
result, err := exec.Execute(plan, sess)
assert.NoError(t, err)
assert.NotNil(t, result)
// 验证所有聚合函数的别名显示
expectedHeaders := []string{"region", "cnt", "sum_amt", "avg_amt", "min_amt", "max_amt"}
assert.Equal(t, expectedHeaders, result.Headers)
})
}
// setupTestData 设置测试数据
func setupTestData(t *testing.T, opt *optimizer.Optimizer, exec *executor.ExecutorImpl, sess *session.Session) {
// 创建数据库
createDbSQL := "CREATE DATABASE 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)
// 设置当前数据库
sess.CurrentDB = "test"
// 创建销售表
createTableSQL := "CREATE TABLE sales (region VARCHAR, amount INT)"
stmt, err = parser.Parse(createTableSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// 插入测试数据
insertData := []string{
"INSERT INTO sales VALUES ('North', 100)",
"INSERT INTO sales VALUES ('South', 150)",
"INSERT INTO sales VALUES ('North', 200)",
"INSERT INTO sales VALUES ('East', 300)",
"INSERT INTO sales VALUES ('North', 50)",
}
for _, insertSQL := range insertData {
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)
}
// 创建用户表和订单表用于复杂查询测试
createUsersSQL := "CREATE TABLE users (id INT, name VARCHAR)"
stmt, err = parser.Parse(createUsersSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
createOrdersSQL := "CREATE TABLE orders (id INT, user_id INT, amount INT)"
stmt, err = parser.Parse(createOrdersSQL)
assert.NoError(t, err)
plan, err = opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
// 插入用户和订单数据
userData := []string{
"INSERT INTO users VALUES (1, 'John Doe')",
"INSERT INTO users VALUES (2, 'Jane Smith')",
}
orderData := []string{
"INSERT INTO orders VALUES (1, 1, 100)",
"INSERT INTO orders VALUES (2, 1, 150)",
"INSERT INTO orders VALUES (3, 2, 75)",
}
for _, userSQL := range userData {
stmt, err := parser.Parse(userSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
}
for _, orderSQL := range orderData {
stmt, err := parser.Parse(orderSQL)
assert.NoError(t, err)
plan, err := opt.Optimize(stmt)
assert.NoError(t, err)
_, err = exec.Execute(plan, sess)
assert.NoError(t, err)
}
}