From ea2afbe9e89fa28e9b4ce5942179bb1fa2bb977d Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Tue, 8 Nov 2016 13:22:46 +0900
Subject: [PATCH] revert Multiple Result Set

---
 sqlite3.go           | 24 +------------------
 sqlite3_go18_test.go | 56 --------------------------------------------
 2 files changed, 1 insertion(+), 79 deletions(-)

diff --git a/sqlite3.go b/sqlite3.go
index cfbdae3..1855eb0 100644
--- a/sqlite3.go
+++ b/sqlite3.go
@@ -191,7 +191,6 @@ type SQLiteRows struct {
 	decltype []string
 	cls      bool
 	done     chan struct{}
-	next     *SQLiteRows
 }
 
 type functionInfo struct {
@@ -471,7 +470,6 @@ func (c *SQLiteConn) Query(query string, args []driver.Value) (driver.Rows, erro
 }
 
 func (c *SQLiteConn) query(ctx context.Context, query string, args []namedValue) (driver.Rows, error) {
-	var top, cur *SQLiteRows
 	start := 0
 	for {
 		s, err := c.Prepare(query)
@@ -489,14 +487,7 @@ func (c *SQLiteConn) query(ctx context.Context, query string, args []namedValue)
 		rows, err := s.(*SQLiteStmt).query(ctx, args[:na])
 		if err != nil && err != driver.ErrSkip {
 			s.Close()
-			return top, err
-		}
-		if top == nil {
-			top = rows.(*SQLiteRows)
-			cur = top
-		} else {
-			cur.next = rows.(*SQLiteRows)
-			cur = cur.next
+			return rows, err
 		}
 		args = args[na:]
 		start += na
@@ -772,7 +763,6 @@ func (s *SQLiteStmt) query(ctx context.Context, args []namedValue) (driver.Rows,
 		decltype: nil,
 		cls:      s.cls,
 		done:     make(chan struct{}),
-		next:     nil,
 	}
 
 	go func() {
@@ -970,15 +960,3 @@ func (rc *SQLiteRows) Next(dest []driver.Value) error {
 	}
 	return nil
 }
-
-func (rc *SQLiteRows) HasNextResultSet() bool {
-	return rc.next != nil
-}
-
-func (rc *SQLiteRows) NextResultSet() error {
-	if rc.next == nil {
-		return io.EOF
-	}
-	*rc = *rc.next
-	return nil
-}
diff --git a/sqlite3_go18_test.go b/sqlite3_go18_test.go
index 0536042..54e6604 100644
--- a/sqlite3_go18_test.go
+++ b/sqlite3_go18_test.go
@@ -9,7 +9,6 @@ package sqlite3
 
 import (
 	"database/sql"
-	"fmt"
 	"os"
 	"testing"
 )
@@ -49,58 +48,3 @@ func TestNamedParams(t *testing.T) {
 		t.Error("Failed to db.QueryRow: not matched results")
 	}
 }
-
-func TestMultipleResultSet(t *testing.T) {
-	tempFilename := TempFilename(t)
-	defer os.Remove(tempFilename)
-	db, err := sql.Open("sqlite3", tempFilename)
-	if err != nil {
-		t.Fatal("Failed to open database:", err)
-	}
-	defer db.Close()
-
-	_, err = db.Exec(`
-	create table foo (id integer, name text);
-	`)
-	if err != nil {
-		t.Error("Failed to call db.Query:", err)
-	}
-
-	for i := 0; i < 100; i++ {
-		_, err = db.Exec(`insert into foo(id, name) values(?, ?)`, i+1, fmt.Sprintf("foo%03d", i+1))
-		if err != nil {
-			t.Error("Failed to call db.Exec:", err)
-		}
-	}
-
-	rows, err := db.Query(`
-	select id, name from foo where id < :id1;
-	select id, name from foo where id = :id2;
-	select id, name from foo where id > :id3;
-	`,
-		sql.Param(":id1", 3),
-		sql.Param(":id2", 50),
-		sql.Param(":id3", 98),
-	)
-	if err != nil {
-		t.Error("Failed to call db.Query:", err)
-	}
-
-	var id int
-	var extra string
-
-	for {
-		for rows.Next() {
-			err = rows.Scan(&id, &extra)
-			if err != nil {
-				t.Error("Failed to db.Scan:", err)
-			}
-			if id != 1 || extra != "foo" {
-				t.Error("Failed to db.QueryRow: not matched results")
-			}
-		}
-		if !rows.NextResultSet() {
-			break
-		}
-	}
-}