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database/sql: make error prefixes consistent

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Ensure all error prefixes in the "database/sql" package start with
"sql: ". Do not prefix errors for type conversions because they
are always embedded in another error message with a specific
context.

Fixes #25251

Change-Id: I349d9804f3bfda4eeb755b32b508ec5992c28e07
Reviewed-on: https://go-review.googlesource.com/111637
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Daniel Theophanes 2018-05-05 07:18:21 -07:00
parent f7c767edc5
commit 5cf3e34f96
2 changed files with 13 additions and 14 deletions
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23
src/database/sql/fakedb_test.go
View File

@ -296,10 +296,10 @@ func (db *fakeDB) createTable(name string, columnNames, columnTypes []string) er
db.tables = make(map[string]*table)
}
if _, exist := db.tables[name]; exist {
return fmt.Errorf("table %q already exists", name)
return fmt.Errorf("fakedb: table %q already exists", name)
}
if len(columnNames) != len(columnTypes) {
return fmt.Errorf("create table of %q len(names) != len(types): %d vs %d",
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}
@ -365,7 +365,7 @@ func (c *fakeConn) Begin() (driver.Tx, error) {
return nil, driver.ErrBadConn
}
if c.currTx != nil {
return nil, errors.New("already in a transaction")
return nil, errors.New("fakedb: already in a transaction")
}
c.touchMem()
c.currTx = &fakeTx{c: c}
@ -419,13 +419,13 @@ func (c *fakeConn) Close() (err error) {
}()
c.touchMem()
if c.currTx != nil {
return errors.New("can't close fakeConn; in a Transaction")
return errors.New("fakedb: can't close fakeConn; in a Transaction")
}
if c.db == nil {
return errors.New("can't close fakeConn; already closed")
return errors.New("fakedb: can't close fakeConn; already closed")
}
if c.stmtsMade > c.stmtsClosed {
return errors.New("can't close; dangling statement(s)")
return errors.New("fakedb: can't close; dangling statement(s)")
}
c.db = nil
return nil
@ -437,7 +437,7 @@ func checkSubsetTypes(allowAny bool, args []driver.NamedValue) error {
case int64, float64, bool, nil, []byte, string, time.Time:
default:
if !allowAny {
return fmt.Errorf("fakedb_test: invalid argument ordinal %[1]d: %[2]v, type %[2]T", arg.Ordinal, arg.Value)
return fmt.Errorf("fakedb: invalid argument ordinal %[1]d: %[2]v, type %[2]T", arg.Ordinal, arg.Value)
}
}
}
@ -729,7 +729,7 @@ func (s *fakeStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (d
return nil, driver.ErrBadConn
}
if s.c.isDirtyAndMark() {
return nil, errors.New("session is dirty")
return nil, errors.New("fakedb: session is dirty")
}
err := checkSubsetTypes(s.c.db.allowAny, args)
@ -765,8 +765,7 @@ func (s *fakeStmt) ExecContext(ctx context.Context, args []driver.NamedValue) (d
// Used for some of the concurrent tests.
return s.execInsert(args, false)
}
fmt.Printf("EXEC statement, cmd=%q: %#v\n", s.cmd, s)
return nil, fmt.Errorf("unimplemented statement Exec command type of %q", s.cmd)
return nil, fmt.Errorf("fakedb: unimplemented statement Exec command type of %q", s.cmd)
}
// When doInsert is true, add the row to the table.
@ -844,7 +843,7 @@ func (s *fakeStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (
return nil, driver.ErrBadConn
}
if s.c.isDirtyAndMark() {
return nil, errors.New("session is dirty")
return nil, errors.New("fakedb: session is dirty")
}
err := checkSubsetTypes(s.c.db.allowAny, args)
@ -900,7 +899,7 @@ func (s *fakeStmt) QueryContext(ctx context.Context, args []driver.NamedValue) (
idx := t.columnIndex(wcol.Column)
if idx == -1 {
t.mu.Unlock()
return nil, fmt.Errorf("db: invalid where clause column %q", wcol)
return nil, fmt.Errorf("fakedb: invalid where clause column %q", wcol)
}
tcol := trow.cols[idx]
if bs, ok := tcol.([]byte); ok {

4
src/database/sql/sql.go
View File

@ -1631,7 +1631,7 @@ func (db *DB) Driver() driver.Driver {
// ErrConnDone is returned by any operation that is performed on a connection
// that has already been returned to the connection pool.
var ErrConnDone = errors.New("database/sql: connection is already closed")
var ErrConnDone = errors.New("sql: connection is already closed")
// Conn returns a single connection by either opening a new connection
// or returning an existing connection from the connection pool. Conn will
@ -1879,7 +1879,7 @@ func (tx *Tx) isDone() bool {
// ErrTxDone is returned by any operation that is performed on a transaction
// that has already been committed or rolled back.
var ErrTxDone = errors.New("sql: Transaction has already been committed or rolled back")
var ErrTxDone = errors.New("sql: transaction has already been committed or rolled back")
// close returns the connection to the pool and
// must only be called by Tx.rollback or Tx.Commit.