| // Copyright 2011 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package sql |
| |
| import ( |
| "context" |
| "database/sql/driver" |
| "errors" |
| "fmt" |
| "io" |
| "log" |
| "reflect" |
| "sort" |
| "strconv" |
| "strings" |
| "sync" |
| "testing" |
| "time" |
| ) |
| |
| var _ = log.Printf |
| |
| // fakeDriver is a fake database that implements Go's driver.Driver |
| // interface, just for testing. |
| // |
| // It speaks a query language that's semantically similar to but |
| // syntactically different and simpler than SQL. The syntax is as |
| // follows: |
| // |
| // WIPE |
| // CREATE|<tablename>|<col>=<type>,<col>=<type>,... |
| // where types are: "string", [u]int{8,16,32,64}, "bool" |
| // INSERT|<tablename>|col=val,col2=val2,col3=? |
| // SELECT|<tablename>|projectcol1,projectcol2|filtercol=?,filtercol2=? |
| // SELECT|<tablename>|projectcol1,projectcol2|filtercol=?param1,filtercol2=?param2 |
| // |
| // Any of these can be preceded by PANIC|<method>|, to cause the |
| // named method on fakeStmt to panic. |
| // |
| // Any of these can be proceeded by WAIT|<duration>|, to cause the |
| // named method on fakeStmt to sleep for the specified duration. |
| // |
| // Multiple of these can be combined when separated with a semicolon. |
| // |
| // When opening a fakeDriver's database, it starts empty with no |
| // tables. All tables and data are stored in memory only. |
| type fakeDriver struct { |
| mu sync.Mutex // guards 3 following fields |
| openCount int // conn opens |
| closeCount int // conn closes |
| waitCh chan struct{} |
| waitingCh chan struct{} |
| dbs map[string]*fakeDB |
| } |
| |
| type fakeConnector struct { |
| name string |
| |
| waiter func(context.Context) |
| } |
| |
| func (c *fakeConnector) Connect(context.Context) (driver.Conn, error) { |
| conn, err := fdriver.Open(c.name) |
| conn.(*fakeConn).waiter = c.waiter |
| return conn, err |
| } |
| |
| func (c *fakeConnector) Driver() driver.Driver { |
| return fdriver |
| } |
| |
| type fakeDriverCtx struct { |
| fakeDriver |
| } |
| |
| var _ driver.DriverContext = &fakeDriverCtx{} |
| |
| func (cc *fakeDriverCtx) OpenConnector(name string) (driver.Connector, error) { |
| return &fakeConnector{name: name}, nil |
| } |
| |
| type fakeDB struct { |
| name string |
| |
| mu sync.Mutex |
| tables map[string]*table |
| badConn bool |
| allowAny bool |
| } |
| |
| type table struct { |
| mu sync.Mutex |
| colname []string |
| coltype []string |
| rows []*row |
| } |
| |
| func (t *table) columnIndex(name string) int { |
| for n, nname := range t.colname { |
| if name == nname { |
| return n |
| } |
| } |
| return -1 |
| } |
| |
| type row struct { |
| cols []interface{} // must be same size as its table colname + coltype |
| } |
| |
| type memToucher interface { |
| // touchMem reads & writes some memory, to help find data races. |
| touchMem() |
| } |
| |
| type fakeConn struct { |
| db *fakeDB // where to return ourselves to |
| |
| currTx *fakeTx |
| |
| // Every operation writes to line to enable the race detector |
| // check for data races. |
| line int64 |
| |
| // Stats for tests: |
| mu sync.Mutex |
| stmtsMade int |
| stmtsClosed int |
| numPrepare int |
| |
| // bad connection tests; see isBad() |
| bad bool |
| stickyBad bool |
| |
| skipDirtySession bool // tests that use Conn should set this to true. |
| |
| // dirtySession tests ResetSession, true if a query has executed |
| // until ResetSession is called. |
| dirtySession bool |
| |
| // The waiter is called before each query. May be used in place of the "WAIT" |
| // directive. |
| waiter func(context.Context) |
| } |
| |
| func (c *fakeConn) touchMem() { |
| c.line++ |
| } |
| |
| func (c *fakeConn) incrStat(v *int) { |
| c.mu.Lock() |
| *v++ |
| c.mu.Unlock() |
| } |
| |
| type fakeTx struct { |
| c *fakeConn |
| } |
| |
| type boundCol struct { |
| Column string |
| Placeholder string |
| Ordinal int |
| } |
| |
| type fakeStmt struct { |
| memToucher |
| c *fakeConn |
| q string // just for debugging |
| |
| cmd string |
| table string |
| panic string |
| wait time.Duration |
| |
| next *fakeStmt // used for returning multiple results. |
| |
| closed bool |
| |
| colName []string // used by CREATE, INSERT, SELECT (selected columns) |
| colType []string // used by CREATE |
| colValue []interface{} // used by INSERT (mix of strings and "?" for bound params) |
| placeholders int // used by INSERT/SELECT: number of ? params |
| |
| whereCol []boundCol // used by SELECT (all placeholders) |
| |
| placeholderConverter []driver.ValueConverter // used by INSERT |
| } |
| |
| var fdriver driver.Driver = &fakeDriver{} |
| |
| func init() { |
| Register("test", fdriver) |
| } |
| |
| func contains(list []string, y string) bool { |
| for _, x := range list { |
| if x == y { |
| return true |
| } |
| } |
| return false |
| } |
| |
| type Dummy struct { |
| driver.Driver |
| } |
| |
| func TestDrivers(t *testing.T) { |
| unregisterAllDrivers() |
| Register("test", fdriver) |
| Register("invalid", Dummy{}) |
| all := Drivers() |
| if len(all) < 2 || !sort.StringsAreSorted(all) || !contains(all, "test") || !contains(all, "invalid") { |
| t.Fatalf("Drivers = %v, want sorted list with at least [invalid, test]", all) |
| } |
| } |
| |
| // hook to simulate connection failures |
| var hookOpenErr struct { |
| sync.Mutex |
| fn func() error |
| } |
| |
| func setHookOpenErr(fn func() error) { |
| hookOpenErr.Lock() |
| defer hookOpenErr.Unlock() |
| hookOpenErr.fn = fn |
| } |
| |
| // Supports dsn forms: |
| // <dbname> |
| // <dbname>;<opts> (only currently supported option is `badConn`, |
| // which causes driver.ErrBadConn to be returned on |
| // every other conn.Begin()) |
| func (d *fakeDriver) Open(dsn string) (driver.Conn, error) { |
| hookOpenErr.Lock() |
| fn := hookOpenErr.fn |
| hookOpenErr.Unlock() |
| if fn != nil { |
| if err := fn(); err != nil { |
| return nil, err |
| } |
| } |
| parts := strings.Split(dsn, ";") |
| if len(parts) < 1 { |
| return nil, errors.New("fakedb: no database name") |
| } |
| name := parts[0] |
| |
| db := d.getDB(name) |
| |
| d.mu.Lock() |
| d.openCount++ |
| d.mu.Unlock() |
| conn := &fakeConn{db: db} |
| |
| if len(parts) >= 2 && parts[1] == "badConn" { |
| conn.bad = true |
| } |
| if d.waitCh != nil { |
| d.waitingCh <- struct{}{} |
| <-d.waitCh |
| d.waitCh = nil |
| d.waitingCh = nil |
| } |
| return conn, nil |
| } |
| |
| func (d *fakeDriver) getDB(name string) *fakeDB { |
| d.mu.Lock() |
| defer d.mu.Unlock() |
| if d.dbs == nil { |
| d.dbs = make(map[string]*fakeDB) |
| } |
| db, ok := d.dbs[name] |
| if !ok { |
| db = &fakeDB{name: name} |
| d.dbs[name] = db |
| } |
| return db |
| } |
| |
| func (db *fakeDB) wipe() { |
| db.mu.Lock() |
| defer db.mu.Unlock() |
| db.tables = nil |
| } |
| |
| func (db *fakeDB) createTable(name string, columnNames, columnTypes []string) error { |
| db.mu.Lock() |
| defer db.mu.Unlock() |
| if db.tables == nil { |
| db.tables = make(map[string]*table) |
| } |
| if _, exist := db.tables[name]; exist { |
| return fmt.Errorf("fakedb: table %q already exists", name) |
| } |
| if len(columnNames) != len(columnTypes) { |
| return fmt.Errorf("fakedb: create table of %q len(names) != len(types): %d vs %d", |
| name, len(columnNames), len(columnTypes)) |
| } |
| db.tables[name] = &table{colname: columnNames, coltype: columnTypes} |
| return nil |
| } |
| |
| // must be called with db.mu lock held |
| func (db *fakeDB) table(table string) (*table, bool) { |
| if db.tables == nil { |
| return nil, false |
| } |
| t, ok := db.tables[table] |
| return t, ok |
| } |
| |
| func (db *fakeDB) columnType(table, column string) (typ string, ok bool) { |
| db.mu.Lock() |
| defer db.mu.Unlock() |
| t, ok := db.table(table) |
| if !ok { |
| return |
| } |
| for n, cname := range t.colname { |
| if cname == column { |
| return t.coltype[n], true |
| } |
| } |
| return "", false |
| } |
| |
| func (c *fakeConn) isBad() bool { |
| if c.stickyBad { |
| return true |
| } else if c.bad { |
| if c.db == nil { |
| return false |
| } |
| // alternate between bad conn and not bad conn |
| c.db.badConn = !c.db.badConn |
| return c.db.badConn |
| } else { |
| return false |
| } |
| } |
| |
| func (c *fakeConn) isDirtyAndMark() bool { |
| if c.skipDirtySession { |
| return false |
| } |
| if c.currTx != nil { |
| c.dirtySession = true |
| return false |
| } |
| if c.dirtySession { |
| return true |
| } |
| c.dirtySession = true |
| return false |
| } |
| |
| func (c *fakeConn) Begin() (driver.Tx, error) { |
| if c.isBad() { |
| return nil, driver.ErrBadConn |
| } |
| if c.currTx != nil { |
| return nil, errors.New("fakedb: already in a transaction") |
| } |
| c.touchMem() |
| c.currTx = &fakeTx{c: c} |
| return c.currTx, nil |
| } |
| |
| var hookPostCloseConn struct { |
| sync.Mutex |
| fn func(*fakeConn, error) |
| } |
| |
| func setHookpostCloseConn(fn func(*fakeConn, error)) { |
| hookPostCloseConn.Lock() |
| defer hookPostCloseConn.Unlock() |
| hookPostCloseConn.fn = fn |
| } |
| |
| var testStrictClose *testing.T |
| |
| // setStrictFakeConnClose sets the t to Errorf on when fakeConn.Close |
| // fails to close. If nil, the check is disabled. |
| func setStrictFakeConnClose(t *testing.T) { |
| testStrictClose = t |
| } |
| |
| func (c *fakeConn) ResetSession(ctx context.Context) error { |
| c.dirtySession = false |
| if c.isBad() { |
| return driver.ErrBadConn |
| } |
| return nil |
| } |
| |
| func (c *fakeConn) Close() (err error) { |
| drv := fdriver.(*fakeDriver) |
| defer func() { |
| if err != nil && testStrictClose != nil { |
| testStrictClose.Errorf("failed to close a test fakeConn: %v", err) |
| } |
| hookPostCloseConn.Lock() |
| fn := hookPostCloseConn.fn |
| hookPostCloseConn.Unlock() |
| if fn != nil { |
| fn(c, err) |
| } |
| if err == nil { |
| drv.mu.Lock() |
| drv.closeCount++ |
| drv.mu.Unlock() |
| } |
| }() |
| c.touchMem() |
| if c.currTx != nil { |
| return errors.New("fakedb: can't close fakeConn; in a Transaction") |
| } |
| if c.db == nil { |
| return errors.New("fakedb: can't close fakeConn; already closed") |
| } |
| if c.stmtsMade > c.stmtsClosed { |
| return errors.New("fakedb: can't close; dangling statement(s)") |
| } |
| c.db = nil |
| return nil |
| } |
| |
| func checkSubsetTypes(allowAny bool, args []driver.NamedValue) error { |
| for _, arg := range args { |
| switch arg.Value.(type) { |
| case int64, float64, bool, nil, []byte, string, time.Time: |
| default: |
| if !allowAny { |
| return fmt.Errorf("fakedb: invalid argument ordinal %[1]d: %[2]v, type %[2]T", arg.Ordinal, arg.Value) |
| } |
| } |
| } |
| return nil |
| } |
| |
| func (c *fakeConn) Exec(query string, args []driver.Value) (driver.Result, error) { |
| // Ensure that ExecContext is called if available. |
| panic("ExecContext was not called.") |
| } |
| |
| func (c *fakeConn) ExecContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Result, error) { |
| // This is an optional interface, but it's implemented here |
| // just to check that all the args are of the proper types. |
| // ErrSkip is returned so the caller acts as if we didn't |
| // implement this at all. |
| err := checkSubsetTypes(c.db.allowAny, args) |
| if err != nil { |
| return nil, err |
| } |
| return nil, driver.ErrSkip |
| } |
| |
| func (c *fakeConn) Query(query string, args []driver.Value) (driver.Rows, error) { |
| // Ensure that ExecContext is called if available. |
| panic("QueryContext was not called.") |
| } |
| |
| func (c *fakeConn) QueryContext(ctx context.Context, query string, args []driver.NamedValue) (driver.Rows, error) { |
| // This is an optional interface, but it's implemented here |
| // just to check that all the args are of the proper types. |
| // ErrSkip is returned so the caller acts as if we didn't |
| // implement this at all. |
| err := checkSubsetTypes(c.db.allowAny, args) |
| if err != nil { |
| return nil, err |
| } |
| return nil, driver.ErrSkip |
| } |
| |
| func errf(msg string, args ...interface{}) error { |
| return errors.New("fakedb: " + fmt.Sprintf(msg, args...)) |
| } |
| |
| // parts are table|selectCol1,selectCol2|whereCol=?,whereCol2=? |
| // (note that where columns must always contain ? marks, |
| // just a limitation for fakedb) |
| func (c *fakeConn) prepareSelect(stmt *fakeStmt, parts []string) (*fakeStmt, error) { |
| if len(parts) != 3 { |
| stmt.Close() |
| return nil, errf("invalid SELECT syntax with %d parts; want 3", len(parts)) |
| } |
| stmt.table = parts[0] |
| |
| stmt.colName = strings.Split(parts[1], ",") |
| for n, colspec := range strings.Split(parts[2], ",") { |
| if colspec == "" { |
| continue |
| } |
| nameVal := strings.Split(colspec, "=") |
| if len(nameVal) != 2 { |
| stmt.Close() |
| return nil, errf("SELECT on table %q has invalid column spec of %q (index %d)", stmt.table, colspec, n) |
| } |
| column, value := nameVal[0], nameVal[1] |
| _, ok := c.db.columnType(stmt.table, column) |
| if !ok { |
| stmt.Close() |
| return nil, errf("SELECT on table %q references non-existent column %q", stmt.table, column) |
| } |
| if !strings.HasPrefix(value, "?") { |
| stmt.Close() |
| return nil, errf("SELECT on table %q has pre-bound value for where column %q; need a question mark", |
| stmt.table, column) |
| } |
| stmt.placeholders++ |
| stmt.whereCol = append(stmt.whereCol, boundCol{Column: column, Placeholder: value, Ordinal: stmt.placeholders}) |
| } |
| return stmt, nil |
| } |
| |
| // parts are table|col=type,col2=type2 |
| func (c *fakeConn) prepareCreate(stmt *fakeStmt, parts []string) (*fakeStmt, error) { |
| if len(parts) != 2 { |
| stmt.Close() |
| return nil, errf("invalid CREATE syntax with %d parts; want 2", len(parts)) |
| } |
| stmt.table = parts[0] |
| for n, colspec := range strings.Split(parts[1], ",") { |
| nameType := strings.Split(colspec, "=") |
| if len(nameType) != 2 { |
| stmt.Close() |
| return nil, errf("CREATE table %q has invalid column spec of %q (index %d)", stmt.table, colspec, n) |
| } |
| stmt.colName = append(stmt.colName, nameType[0]) |
| stmt.colType = append(stmt.colType, nameType[1]) |
| } |
| return stmt, nil |
| } |
| |
| // parts are table|col=?,col2=val |
| func (c *fakeConn) prepareInsert(stmt *fakeStmt, parts []string) (*fakeStmt, error) { |
| if len(parts) != 2 { |
| stmt.Close() |
| return nil, errf("invalid INSERT syntax with %d parts; want 2", len(parts)) |
| } |
| stmt.table = parts[0] |
| for n, colspec := range strings.Split(parts[1], ",") { |
| nameVal := strings.Split(colspec, "=") |
| if len(nameVal) != 2 { |
| stmt.Close() |
| return nil, errf("INSERT table %q has invalid column spec of %q (index %d)", stmt.table, colspec, n) |
| } |
| column, value := nameVal[0], nameVal[1] |
| ctype, ok := c.db.columnType(stmt.table, column) |
| if !ok { |
| stmt.Close() |
| return nil, errf("INSERT table %q references non-existent column %q", stmt.table, column) |
| } |
| stmt.colName = append(stmt.colName, column) |
| |
| if !strings.HasPrefix(value, "?") { |
| var subsetVal interface{} |
| // Convert to driver subset type |
| switch ctype { |
| case "string": |
| subsetVal = []byte(value) |
| case "blob": |
| subsetVal = []byte(value) |
| case "int32": |
| i, err := strconv.Atoi(value) |
| if err != nil { |
| stmt.Close() |
| return nil, errf("invalid conversion to int32 from %q", value) |
| } |
| subsetVal = int64(i) // int64 is a subset type, but not int32 |
| default: |
| stmt.Close() |
| return nil, errf("unsupported conversion for pre-bound parameter %q to type %q", value, ctype) |
| } |
| stmt.colValue = append(stmt.colValue, subsetVal) |
| } else { |
| stmt.placeholders++ |
| stmt.placeholderConverter = append(stmt.placeholderConverter, converterForType(ctype)) |
| stmt.colValue = append(stmt.colValue, value) |
| } |
| } |
| return stmt, nil |
| } |
| |
| // hook to simulate broken connections |
| var hookPrepareBadConn func() bool |
| |
| func (c *fakeConn) Prepare(query string) (driver.Stmt, error) { |
| panic("use PrepareContext") |
| } |
| |
| func (c *fakeConn) PrepareContext(ctx context.Context, query string) (driver.Stmt, error) { |
| c.numPrepare++ |
| if c.db == nil { |
| panic("nil c.db; conn = " + fmt.Sprintf("%#v", c)) |
| } |
| |
| if c.stickyBad || (hookPrepareBadConn != nil && hookPrepareBadConn()) { |
| return nil, driver.ErrBadConn |
| } |
| |
| c.touchMem() |
| var firstStmt, prev *fakeStmt |
| for _, query := range strings.Split(query, ";") { |
| parts := strings.Split(query, "|") |
| if len(parts) < 1 { |
| return nil, errf("empty query") |
| } |
| stmt := &fakeStmt{q: query, c: c, memToucher: c} |
| if firstStmt == nil { |
| firstStmt = stmt |
| } |
| if len(parts) >= 3 { |
| switch parts[0] { |
| case "PANIC": |
| stmt.panic = parts[1] |
| parts = parts[2:] |
| case "WAIT": |
| wait, err := time.ParseDuration(parts[1]) |
| if err != nil { |
| return nil, errf("expected section after WAIT to be a duration, got %q %v", parts[1], err) |
| } |
| parts = parts[2:] |
| stmt.wait = wait |
| } |
| } |
| cmd := parts[0] |
| stmt.cmd = cmd |
| parts = parts[1:] |
| |
| if c.waiter != nil { |
| c.waiter(ctx) |
| } |
| |
| if stmt.wait > 0 { |
| wait := time.NewTimer(stmt.wait) |
| select { |
| case <-wait.C: |
| case <-ctx.Done(): |
| wait.Stop() |
| return nil, ctx.Err() |
| } |
| } |
| |
| c.incrStat(&c.stmtsMade) |
| var err error |
| switch cmd { |
| case "WIPE": |
| // Nothing |
| case "SELECT": |
| stmt, err = c.prepareSelect(stmt, parts) |
| case "CREATE": |
| stmt, err = c.prepareCreate(stmt, parts) |
| case "INSERT": |
| stmt, err = c.prepareInsert(stmt, parts) |
| case "NOSERT": |
| // Do all the prep-work like for an INSERT but don't actually insert the row. |
| // Used for some of the concurrent tests. |
| stmt, err = c.prepareInsert(stmt, parts) |
| default: |
| stmt.Close() |
| return nil, errf("unsupported command type %q", cmd) |
| } |
| if err != nil { |
| return nil, err |
| } |
| if prev != nil { |
| prev.next = stmt |
| } |
| prev = stmt |
| } |
| return firstStmt, nil |
| } |
| |
| func (s *fakeStmt) ColumnConverter(idx int) driver.ValueConverter { |
| if s.panic == "ColumnConverter" { |
| panic(s.panic) |
| } |
| if len(s.placeholderConverter) == 0 { |
| return driver.DefaultParameterConverter |
| } |
| return s.placeholderConverter[idx] |
| } |
| |
| func (s *fakeStmt) Close() error { |
| if s.panic == "Close" { |
| panic(s.panic) |
| } |
| if s.c == nil { |
| panic("nil conn in fakeStmt.Close") |
| } |
| if s.c.db == nil { |
| panic("in fakeStmt.Close, conn's db is nil (already closed)") |
| } |
| s.touchMem() |
| if !s.closed { |
| s.c.incrStat(&s.c.stmtsClosed) |
| s.closed = true |
| } |
| if s.next != nil { |
| s.next.Close() |
| } |
| return nil |
| } |
| |
| var errClosed = errors.New("fakedb: statement has been closed") |
| |
| // hook to simulate broken connections |
| var hookExecBadConn func() bool |
| |
| func (s *fakeStmt) Exec(args []driver.Value) (driver.Result, error) { |
| panic("Using ExecContext") |
| } |
| func (s *fakeStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (driver.Result, error) { |
| if s.panic == "Exec" { |
| panic(s.panic) |
| } |
| if s.closed { |
| return nil, errClosed |
| } |
| |
| if s.c.stickyBad || (hookExecBadConn != nil && hookExecBadConn()) { |
| return nil, driver.ErrBadConn |
| } |
| if s.c.isDirtyAndMark() { |
| return nil, errors.New("fakedb: session is dirty") |
| } |
| |
| err := checkSubsetTypes(s.c.db.allowAny, args) |
| if err != nil { |
| return nil, err |
| } |
| s.touchMem() |
| |
| if s.wait > 0 { |
| time.Sleep(s.wait) |
| } |
| |
| select { |
| default: |
| case <-ctx.Done(): |
| return nil, ctx.Err() |
| } |
| |
| db := s.c.db |
| switch s.cmd { |
| case "WIPE": |
| db.wipe() |
| return driver.ResultNoRows, nil |
| case "CREATE": |
| if err := db.createTable(s.table, s.colName, s.colType); err != nil { |
| return nil, err |
| } |
| return driver.ResultNoRows, nil |
| case "INSERT": |
| return s.execInsert(args, true) |
| case "NOSERT": |
| // Do all the prep-work like for an INSERT but don't actually insert the row. |
| // Used for some of the concurrent tests. |
| return s.execInsert(args, false) |
| } |
| return nil, fmt.Errorf("fakedb: unimplemented statement Exec command type of %q", s.cmd) |
| } |
| |
| // When doInsert is true, add the row to the table. |
| // When doInsert is false do prep-work and error checking, but don't |
| // actually add the row to the table. |
| func (s *fakeStmt) execInsert(args []driver.NamedValue, doInsert bool) (driver.Result, error) { |
| db := s.c.db |
| if len(args) != s.placeholders { |
| panic("error in pkg db; should only get here if size is correct") |
| } |
| db.mu.Lock() |
| t, ok := db.table(s.table) |
| db.mu.Unlock() |
| if !ok { |
| return nil, fmt.Errorf("fakedb: table %q doesn't exist", s.table) |
| } |
| |
| t.mu.Lock() |
| defer t.mu.Unlock() |
| |
| var cols []interface{} |
| if doInsert { |
| cols = make([]interface{}, len(t.colname)) |
| } |
| argPos := 0 |
| for n, colname := range s.colName { |
| colidx := t.columnIndex(colname) |
| if colidx == -1 { |
| return nil, fmt.Errorf("fakedb: column %q doesn't exist or dropped since prepared statement was created", colname) |
| } |
| var val interface{} |
| if strvalue, ok := s.colValue[n].(string); ok && strings.HasPrefix(strvalue, "?") { |
| if strvalue == "?" { |
| val = args[argPos].Value |
| } else { |
| // Assign value from argument placeholder name. |
| for _, a := range args { |
| if a.Name == strvalue[1:] { |
| val = a.Value |
| break |
| } |
| } |
| } |
| argPos++ |
| } else { |
| val = s.colValue[n] |
| } |
| if doInsert { |
| cols[colidx] = val |
| } |
| } |
| |
| if doInsert { |
| t.rows = append(t.rows, &row{cols: cols}) |
| } |
| return driver.RowsAffected(1), nil |
| } |
| |
| // hook to simulate broken connections |
| var hookQueryBadConn func() bool |
| |
| func (s *fakeStmt) Query(args []driver.Value) (driver.Rows, error) { |
| panic("Use QueryContext") |
| } |
| |
| func (s *fakeStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (driver.Rows, error) { |
| if s.panic == "Query" { |
| panic(s.panic) |
| } |
| if s.closed { |
| return nil, errClosed |
| } |
| |
| if s.c.stickyBad || (hookQueryBadConn != nil && hookQueryBadConn()) { |
| return nil, driver.ErrBadConn |
| } |
| if s.c.isDirtyAndMark() { |
| return nil, errors.New("fakedb: session is dirty") |
| } |
| |
| err := checkSubsetTypes(s.c.db.allowAny, args) |
| if err != nil { |
| return nil, err |
| } |
| |
| s.touchMem() |
| db := s.c.db |
| if len(args) != s.placeholders { |
| panic("error in pkg db; should only get here if size is correct") |
| } |
| |
| setMRows := make([][]*row, 0, 1) |
| setColumns := make([][]string, 0, 1) |
| setColType := make([][]string, 0, 1) |
| |
| for { |
| db.mu.Lock() |
| t, ok := db.table(s.table) |
| db.mu.Unlock() |
| if !ok { |
| return nil, fmt.Errorf("fakedb: table %q doesn't exist", s.table) |
| } |
| |
| if s.table == "magicquery" { |
| if len(s.whereCol) == 2 && s.whereCol[0].Column == "op" && s.whereCol[1].Column == "millis" { |
| if args[0].Value == "sleep" { |
| time.Sleep(time.Duration(args[1].Value.(int64)) * time.Millisecond) |
| } |
| } |
| } |
| |
| t.mu.Lock() |
| |
| colIdx := make(map[string]int) // select column name -> column index in table |
| for _, name := range s.colName { |
| idx := t.columnIndex(name) |
| if idx == -1 { |
| t.mu.Unlock() |
| return nil, fmt.Errorf("fakedb: unknown column name %q", name) |
| } |
| colIdx[name] = idx |
| } |
| |
| mrows := []*row{} |
| rows: |
| for _, trow := range t.rows { |
| // Process the where clause, skipping non-match rows. This is lazy |
| // and just uses fmt.Sprintf("%v") to test equality. Good enough |
| // for test code. |
| for _, wcol := range s.whereCol { |
| idx := t.columnIndex(wcol.Column) |
| if idx == -1 { |
| t.mu.Unlock() |
| return nil, fmt.Errorf("fakedb: invalid where clause column %q", wcol) |
| } |
| tcol := trow.cols[idx] |
| if bs, ok := tcol.([]byte); ok { |
| // lazy hack to avoid sprintf %v on a []byte |
| tcol = string(bs) |
| } |
| var argValue interface{} |
| if wcol.Placeholder == "?" { |
| argValue = args[wcol.Ordinal-1].Value |
| } else { |
| // Assign arg value from placeholder name. |
| for _, a := range args { |
| if a.Name == wcol.Placeholder[1:] { |
| argValue = a.Value |
| break |
| } |
| } |
| } |
| if fmt.Sprintf("%v", tcol) != fmt.Sprintf("%v", argValue) { |
| continue rows |
| } |
| } |
| mrow := &row{cols: make([]interface{}, len(s.colName))} |
| for seli, name := range s.colName { |
| mrow.cols[seli] = trow.cols[colIdx[name]] |
| } |
| mrows = append(mrows, mrow) |
| } |
| |
| var colType []string |
| for _, column := range s.colName { |
| colType = append(colType, t.coltype[t.columnIndex(column)]) |
| } |
| |
| t.mu.Unlock() |
| |
| setMRows = append(setMRows, mrows) |
| setColumns = append(setColumns, s.colName) |
| setColType = append(setColType, colType) |
| |
| if s.next == nil { |
| break |
| } |
| s = s.next |
| } |
| |
| cursor := &rowsCursor{ |
| parentMem: s.c, |
| posRow: -1, |
| rows: setMRows, |
| cols: setColumns, |
| colType: setColType, |
| errPos: -1, |
| } |
| return cursor, nil |
| } |
| |
| func (s *fakeStmt) NumInput() int { |
| if s.panic == "NumInput" { |
| panic(s.panic) |
| } |
| return s.placeholders |
| } |
| |
| // hook to simulate broken connections |
| var hookCommitBadConn func() bool |
| |
| func (tx *fakeTx) Commit() error { |
| tx.c.currTx = nil |
| if hookCommitBadConn != nil && hookCommitBadConn() { |
| return driver.ErrBadConn |
| } |
| tx.c.touchMem() |
| return nil |
| } |
| |
| // hook to simulate broken connections |
| var hookRollbackBadConn func() bool |
| |
| func (tx *fakeTx) Rollback() error { |
| tx.c.currTx = nil |
| if hookRollbackBadConn != nil && hookRollbackBadConn() { |
| return driver.ErrBadConn |
| } |
| tx.c.touchMem() |
| return nil |
| } |
| |
| type rowsCursor struct { |
| parentMem memToucher |
| cols [][]string |
| colType [][]string |
| posSet int |
| posRow int |
| rows [][]*row |
| closed bool |
| |
| // errPos and err are for making Next return early with error. |
| errPos int |
| err error |
| |
| // a clone of slices to give out to clients, indexed by the |
| // original slice's first byte address. we clone them |
| // just so we're able to corrupt them on close. |
| bytesClone map[*byte][]byte |
| |
| // Every operation writes to line to enable the race detector |
| // check for data races. |
| // This is separate from the fakeConn.line to allow for drivers that |
| // can start multiple queries on the same transaction at the same time. |
| line int64 |
| } |
| |
| func (rc *rowsCursor) touchMem() { |
| rc.parentMem.touchMem() |
| rc.line++ |
| } |
| |
| func (rc *rowsCursor) Close() error { |
| rc.touchMem() |
| rc.parentMem.touchMem() |
| rc.closed = true |
| return nil |
| } |
| |
| func (rc *rowsCursor) Columns() []string { |
| return rc.cols[rc.posSet] |
| } |
| |
| func (rc *rowsCursor) ColumnTypeScanType(index int) reflect.Type { |
| return colTypeToReflectType(rc.colType[rc.posSet][index]) |
| } |
| |
| var rowsCursorNextHook func(dest []driver.Value) error |
| |
| func (rc *rowsCursor) Next(dest []driver.Value) error { |
| if rowsCursorNextHook != nil { |
| return rowsCursorNextHook(dest) |
| } |
| |
| if rc.closed { |
| return errors.New("fakedb: cursor is closed") |
| } |
| rc.touchMem() |
| rc.posRow++ |
| if rc.posRow == rc.errPos { |
| return rc.err |
| } |
| if rc.posRow >= len(rc.rows[rc.posSet]) { |
| return io.EOF // per interface spec |
| } |
| for i, v := range rc.rows[rc.posSet][rc.posRow].cols { |
| // TODO(bradfitz): convert to subset types? naah, I |
| // think the subset types should only be input to |
| // driver, but the sql package should be able to handle |
| // a wider range of types coming out of drivers. all |
| // for ease of drivers, and to prevent drivers from |
| // messing up conversions or doing them differently. |
| dest[i] = v |
| |
| if bs, ok := v.([]byte); ok { |
| if rc.bytesClone == nil { |
| rc.bytesClone = make(map[*byte][]byte) |
| } |
| clone, ok := rc.bytesClone[&bs[0]] |
| if !ok { |
| clone = make([]byte, len(bs)) |
| copy(clone, bs) |
| rc.bytesClone[&bs[0]] = clone |
| } |
| dest[i] = clone |
| } |
| } |
| return nil |
| } |
| |
| func (rc *rowsCursor) HasNextResultSet() bool { |
| rc.touchMem() |
| return rc.posSet < len(rc.rows)-1 |
| } |
| |
| func (rc *rowsCursor) NextResultSet() error { |
| rc.touchMem() |
| if rc.HasNextResultSet() { |
| rc.posSet++ |
| rc.posRow = -1 |
| return nil |
| } |
| return io.EOF // Per interface spec. |
| } |
| |
| // fakeDriverString is like driver.String, but indirects pointers like |
| // DefaultValueConverter. |
| // |
| // This could be surprising behavior to retroactively apply to |
| // driver.String now that Go1 is out, but this is convenient for |
| // our TestPointerParamsAndScans. |
| // |
| type fakeDriverString struct{} |
| |
| func (fakeDriverString) ConvertValue(v interface{}) (driver.Value, error) { |
| switch c := v.(type) { |
| case string, []byte: |
| return v, nil |
| case *string: |
| if c == nil { |
| return nil, nil |
| } |
| return *c, nil |
| } |
| return fmt.Sprintf("%v", v), nil |
| } |
| |
| type anyTypeConverter struct{} |
| |
| func (anyTypeConverter) ConvertValue(v interface{}) (driver.Value, error) { |
| return v, nil |
| } |
| |
| func converterForType(typ string) driver.ValueConverter { |
| switch typ { |
| case "bool": |
| return driver.Bool |
| case "nullbool": |
| return driver.Null{Converter: driver.Bool} |
| case "int32": |
| return driver.Int32 |
| case "string": |
| return driver.NotNull{Converter: fakeDriverString{}} |
| case "nullstring": |
| return driver.Null{Converter: fakeDriverString{}} |
| case "int64": |
| // TODO(coopernurse): add type-specific converter |
| return driver.NotNull{Converter: driver.DefaultParameterConverter} |
| case "nullint64": |
| // TODO(coopernurse): add type-specific converter |
| return driver.Null{Converter: driver.DefaultParameterConverter} |
| case "float64": |
| // TODO(coopernurse): add type-specific converter |
| return driver.NotNull{Converter: driver.DefaultParameterConverter} |
| case "nullfloat64": |
| // TODO(coopernurse): add type-specific converter |
| return driver.Null{Converter: driver.DefaultParameterConverter} |
| case "datetime": |
| return driver.DefaultParameterConverter |
| case "any": |
| return anyTypeConverter{} |
| } |
| panic("invalid fakedb column type of " + typ) |
| } |
| |
| func colTypeToReflectType(typ string) reflect.Type { |
| switch typ { |
| case "bool": |
| return reflect.TypeOf(false) |
| case "nullbool": |
| return reflect.TypeOf(NullBool{}) |
| case "int32": |
| return reflect.TypeOf(int32(0)) |
| case "string": |
| return reflect.TypeOf("") |
| case "nullstring": |
| return reflect.TypeOf(NullString{}) |
| case "int64": |
| return reflect.TypeOf(int64(0)) |
| case "nullint64": |
| return reflect.TypeOf(NullInt64{}) |
| case "float64": |
| return reflect.TypeOf(float64(0)) |
| case "nullfloat64": |
| return reflect.TypeOf(NullFloat64{}) |
| case "datetime": |
| return reflect.TypeOf(time.Time{}) |
| case "any": |
| return reflect.TypeOf(new(interface{})).Elem() |
| } |
| panic("invalid fakedb column type of " + typ) |
| } |