diff --git a/cmd/user_program_import/main.go b/cmd/user_program_import/main.go
index d5d9d79..d972be6 100644
--- a/cmd/user_program_import/main.go
+++ b/cmd/user_program_import/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"log"
 	"os"
 	"time"
@@ -12,18 +13,18 @@ import (
 )
 
 const (
-	defaultCSVPath   = "./initial_data/user_program_info_init_20251208.csv"
-	defaultUpdateDir = "./update_data"
+	defaultCSVPath   = "/initial_data/user_program_info_init_20251208.csv"
+	defaultUpdateDir = "/update_data"
 	defaultTimeout   = 10 * time.Minute
 	defaultSchema    = "public"
-	defaultLogDir    = "./log"
+	defaultLogDir    = "/log"
 	targetTableName  = "user_program_info_replica"
 )
 
 func main() {
-	dbURL := os.Getenv("DATABASE_URL")
-	if dbURL == "" {
-		log.Fatal("DATABASE_URL is required")
+	dbURL, err := databaseURL()
+	if err != nil {
+		log.Fatalf("database config: %v", err)
 	}
 
 	csvPath := env("USER_PROGRAM_INFO_CSV", defaultCSVPath)
@@ -57,3 +58,18 @@ func env(key, fallback string) string {
 	}
 	return fallback
 }
+
+func databaseURL() (string, error) {
+	if url := os.Getenv("DATABASE_URL"); url != "" {
+		return url, nil
+	}
+	user := os.Getenv("POSTGRES_USER")
+	pass := os.Getenv("POSTGRES_PASSWORD")
+	host := env("POSTGRES_HOST", "localhost")
+	port := env("POSTGRES_PORT", "5432")
+	db := os.Getenv("POSTGRES_DB")
+	if user == "" || pass == "" || db == "" {
+		return "", fmt.Errorf("DATABASE_URL or POSTGRES_{USER,PASSWORD,DB} is required")
+	}
+	return fmt.Sprintf("postgres://%s:%s@%s:%s/%s?sslmode=disable", user, pass, host, port, db), nil
+}
diff --git a/cmd/user_program_sync/main.go b/cmd/user_program_sync/main.go
index 984d4d9..ca00344 100644
--- a/cmd/user_program_sync/main.go
+++ b/cmd/user_program_sync/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"log"
 	"os"
 	"time"
@@ -14,9 +15,9 @@ const defaultTimeout = 30 * time.Minute
 func main() {
 	logger := log.New(os.Stdout, "[sync] ", log.LstdFlags)
 
-	dbURL := os.Getenv("DATABASE_URL")
-	if dbURL == "" {
-		logger.Fatal("DATABASE_URL is required")
+	dbURL, err := databaseURL()
+	if err != nil {
+		logger.Fatalf("database config: %v", err)
 	}
 
 	mysqlCfg, err := userprogram.NewMySQLConfigFromEnv()
@@ -43,3 +44,24 @@ func main() {
 		logger.Fatalf("sync failed: %v", err)
 	}
 }
+
+func databaseURL() (string, error) {
+	if url := os.Getenv("DATABASE_URL"); url != "" {
+		return url, nil
+	}
+	user := os.Getenv("POSTGRES_USER")
+	pass := os.Getenv("POSTGRES_PASSWORD")
+	host := os.Getenv("POSTGRES_HOST")
+	if host == "" {
+		host = "localhost"
+	}
+	port := os.Getenv("POSTGRES_PORT")
+	if port == "" {
+		port = "5432"
+	}
+	db := os.Getenv("POSTGRES_DB")
+	if user == "" || pass == "" || db == "" {
+		return "", fmt.Errorf("DATABASE_URL or POSTGRES_{USER,PASSWORD,DB} is required")
+	}
+	return fmt.Sprintf("postgres://%s:%s@%s:%s/%s?sslmode=disable", user, pass, host, port, db), nil
+}
diff --git a/internal/importer/user_program_info.go b/internal/importer/user_program_info.go
index 14cc32e..9c1137f 100644
--- a/internal/importer/user_program_info.go
+++ b/internal/importer/user_program_info.go
@@ -177,9 +177,9 @@ func copyAndUpsertCSV(ctx context.Context, conn *pgx.Conn, path, schema, table s
 		_ = tx.Rollback(ctx)
 	}()
 
-	tempTable := fmt.Sprintf("%s_import_tmp", table)
+	tempTable := fmt.Sprintf("%s_import_tmp_%d", table, time.Now().UnixNano())
 
-	if _, err := tx.Exec(ctx, fmt.Sprintf(`CREATE TEMP TABLE %s (LIKE %s INCLUDING ALL);`, quoteIdent(tempTable), pgx.Identifier{schema, table}.Sanitize())); err != nil {
+	if _, err := tx.Exec(ctx, fmt.Sprintf(`CREATE TEMP TABLE %s (LIKE %s INCLUDING ALL) ON COMMIT DROP;`, quoteIdent(tempTable), pgx.Identifier{schema, table}.Sanitize())); err != nil {
 		return res, err
 	}