Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 843 insertions, 0 deletions

diff --git a/storage/mozStorageStatement.cpp b/storage/mozStorageStatement.cpp
new file mode 100644
index 0000000000..6de46e6ea8
--- /dev/null
+++ b/storage/mozStorageStatement.cpp
@@ -0,0 +1,843 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <limits.h>
+#include <stdio.h>
+
+#include "nsError.h"
+#include "nsThreadUtils.h"
+#include "nsIClassInfoImpl.h"
+#include "Variant.h"
+
+#include "mozIStorageError.h"
+
+#include "mozStorageBindingParams.h"
+#include "mozStorageConnection.h"
+#include "mozStorageStatementJSHelper.h"
+#include "mozStoragePrivateHelpers.h"
+#include "mozStorageStatementParams.h"
+#include "mozStorageStatementRow.h"
+#include "mozStorageStatement.h"
+
+#include "mozilla/Logging.h"
+#include "mozilla/Printf.h"
+#include "mozilla/ProfilerLabels.h"
+
+extern mozilla::LazyLogModule gStorageLog;
+
+namespace mozilla {
+namespace storage {
+
+////////////////////////////////////////////////////////////////////////////////
+//// nsIClassInfo
+
+NS_IMPL_CI_INTERFACE_GETTER(Statement, mozIStorageStatement,
+                            mozIStorageBaseStatement, mozIStorageBindingParams,
+                            mozIStorageValueArray,
+                            mozilla::storage::StorageBaseStatementInternal)
+
+class StatementClassInfo : public nsIClassInfo {
+ public:
+  constexpr StatementClassInfo() = default;
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_IMETHOD
+  GetInterfaces(nsTArray<nsIID>& _array) override {
+    return NS_CI_INTERFACE_GETTER_NAME(Statement)(_array);
+  }
+
+  NS_IMETHOD
+  GetScriptableHelper(nsIXPCScriptable** _helper) override {
+    static StatementJSHelper sJSHelper;
+    *_helper = &sJSHelper;
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  GetContractID(nsACString& aContractID) override {
+    aContractID.SetIsVoid(true);
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  GetClassDescription(nsACString& aDesc) override {
+    aDesc.SetIsVoid(true);
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  GetClassID(nsCID** _id) override {
+    *_id = nullptr;
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  GetFlags(uint32_t* _flags) override {
+    *_flags = 0;
+    return NS_OK;
+  }
+
+  NS_IMETHOD
+  GetClassIDNoAlloc(nsCID* _cid) override { return NS_ERROR_NOT_AVAILABLE; }
+};
+
+NS_IMETHODIMP_(MozExternalRefCountType) StatementClassInfo::AddRef() {
+  return 2;
+}
+NS_IMETHODIMP_(MozExternalRefCountType) StatementClassInfo::Release() {
+  return 1;
+}
+NS_IMPL_QUERY_INTERFACE(StatementClassInfo, nsIClassInfo)
+
+static StatementClassInfo sStatementClassInfo;
+
+////////////////////////////////////////////////////////////////////////////////
+//// Statement
+
+Statement::Statement()
+    : mDBStatement(nullptr),
+      mParamCount(0),
+      mResultColumnCount(0),
+      mExecuting(false),
+      mQueryStatusRecorded(false),
+      mHasExecuted(false) {}
+
+nsresult Statement::initialize(Connection* aDBConnection,
+                               sqlite3* aNativeConnection,
+                               const nsACString& aSQLStatement) {
+  MOZ_ASSERT(aDBConnection, "No database connection given!");
+  MOZ_ASSERT(aDBConnection->isConnectionReadyOnThisThread(),
+             "Database connection should be valid");
+  MOZ_ASSERT(!mDBStatement, "Statement already initialized!");
+  MOZ_ASSERT(aNativeConnection, "No native connection given!");
+
+  int srv = aDBConnection->prepareStatement(
+      aNativeConnection, PromiseFlatCString(aSQLStatement), &mDBStatement);
+  if (srv != SQLITE_OK) {
+    MOZ_LOG(gStorageLog, LogLevel::Error,
+            ("Sqlite statement prepare error: %d '%s'", srv,
+             ::sqlite3_errmsg(aNativeConnection)));
+    MOZ_LOG(gStorageLog, LogLevel::Error,
+            ("Statement was: '%s'", PromiseFlatCString(aSQLStatement).get()));
+
+    aDBConnection->RecordQueryStatus(srv);
+    mQueryStatusRecorded = true;
+    return convertResultCode(srv);
+  }
+
+  MOZ_LOG(gStorageLog, LogLevel::Debug,
+          ("Initialized statement '%s' (0x%p)",
+           PromiseFlatCString(aSQLStatement).get(), mDBStatement));
+
+  mDBConnection = aDBConnection;
+  mNativeConnection = aNativeConnection;
+  mParamCount = ::sqlite3_bind_parameter_count(mDBStatement);
+  mResultColumnCount = ::sqlite3_column_count(mDBStatement);
+  mColumnNames.Clear();
+
+  nsCString* columnNames = mColumnNames.AppendElements(mResultColumnCount);
+  for (uint32_t i = 0; i < mResultColumnCount; i++) {
+    const char* name = ::sqlite3_column_name(mDBStatement, i);
+    columnNames[i].Assign(name);
+  }
+
+#ifdef DEBUG
+  // We want to try and test for LIKE and that consumers are using
+  // escapeStringForLIKE instead of just trusting user input.  The idea to
+  // check to see if they are binding a parameter after like instead of just
+  // using a string.  We only do this in debug builds because it's expensive!
+  auto c = nsCaseInsensitiveCStringComparator;
+  nsACString::const_iterator start, end, e;
+  aSQLStatement.BeginReading(start);
+  aSQLStatement.EndReading(end);
+  e = end;
+  while (::FindInReadable(" LIKE"_ns, start, e, c)) {
+    // We have a LIKE in here, so we perform our tests
+    // FindInReadable moves the iterator, so we have to get a new one for
+    // each test we perform.
+    nsACString::const_iterator s1, s2, s3;
+    s1 = s2 = s3 = start;
+
+    if (!(::FindInReadable(" LIKE ?"_ns, s1, end, c) ||
+          ::FindInReadable(" LIKE :"_ns, s2, end, c) ||
+          ::FindInReadable(" LIKE @"_ns, s3, end, c))) {
+      // At this point, we didn't find a LIKE statement followed by ?, :,
+      // or @, all of which are valid characters for binding a parameter.
+      // We will warn the consumer that they may not be safely using LIKE.
+      NS_WARNING(
+          "Unsafe use of LIKE detected!  Please ensure that you "
+          "are using mozIStorageStatement::escapeStringForLIKE "
+          "and that you are binding that result to the statement "
+          "to prevent SQL injection attacks.");
+    }
+
+    // resetting start and e
+    start = e;
+    e = end;
+  }
+#endif
+
+  return NS_OK;
+}
+
+mozIStorageBindingParams* Statement::getParams() {
+  nsresult rv;
+
+  // If we do not have an array object yet, make it.
+  if (!mParamsArray) {
+    nsCOMPtr<mozIStorageBindingParamsArray> array;
+    rv = NewBindingParamsArray(getter_AddRefs(array));
+    NS_ENSURE_SUCCESS(rv, nullptr);
+
+    mParamsArray = static_cast<BindingParamsArray*>(array.get());
+  }
+
+  // If there isn't already any rows added, we'll have to add one to use.
+  if (mParamsArray->length() == 0) {
+    RefPtr<BindingParams> params(new BindingParams(mParamsArray, this));
+    NS_ENSURE_TRUE(params, nullptr);
+
+    rv = mParamsArray->AddParams(params);
+    NS_ENSURE_SUCCESS(rv, nullptr);
+
+    // We have to unlock our params because AddParams locks them.  This is safe
+    // because no reference to the params object was, or ever will be given out.
+    params->unlock(this);
+
+    // We also want to lock our array at this point - we don't want anything to
+    // be added to it.  Nothing has, or will ever get a reference to it, but we
+    // will get additional safety checks via assertions by doing this.
+    mParamsArray->lock();
+  }
+
+  return *mParamsArray->begin();
+}
+
+void Statement::MaybeRecordQueryStatus(int srv, bool isResetting) {
+  // If the statement hasn't been executed synchronously since it was last reset
+  // or created then there is no need to record anything. Asynchronous
+  // statements have their status tracked and recorded by StatementData.
+  if (!mHasExecuted) {
+    return;
+  }
+
+  if (!isResetting && !isErrorCode(srv)) {
+    // Non-errors will be recorded when finalizing.
+    return;
+  }
+
+  // We only record a status if no status has been recorded previously.
+  if (!mQueryStatusRecorded && mDBConnection) {
+    mDBConnection->RecordQueryStatus(srv);
+  }
+
+  // Allow another status to be recorded if we are resetting this statement.
+  mQueryStatusRecorded = !isResetting;
+}
+
+Statement::~Statement() { (void)internalFinalize(true); }
+
+////////////////////////////////////////////////////////////////////////////////
+//// nsISupports
+
+NS_IMPL_ADDREF(Statement)
+NS_IMPL_RELEASE(Statement)
+
+NS_INTERFACE_MAP_BEGIN(Statement)
+  NS_INTERFACE_MAP_ENTRY(mozIStorageStatement)
+  NS_INTERFACE_MAP_ENTRY(mozIStorageBaseStatement)
+  NS_INTERFACE_MAP_ENTRY(mozIStorageBindingParams)
+  NS_INTERFACE_MAP_ENTRY(mozIStorageValueArray)
+  NS_INTERFACE_MAP_ENTRY(mozilla::storage::StorageBaseStatementInternal)
+  if (aIID.Equals(NS_GET_IID(nsIClassInfo))) {
+    foundInterface = static_cast<nsIClassInfo*>(&sStatementClassInfo);
+  } else
+    NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, mozIStorageStatement)
+NS_INTERFACE_MAP_END
+
+////////////////////////////////////////////////////////////////////////////////
+//// StorageBaseStatementInternal
+
+Connection* Statement::getOwner() { return mDBConnection; }
+
+int Statement::getAsyncStatement(sqlite3_stmt** _stmt) {
+  // If we have no statement, we shouldn't be calling this method!
+  NS_ASSERTION(mDBStatement != nullptr, "We have no statement to clone!");
+
+  // If we do not yet have a cached async statement, clone our statement now.
+  if (!mAsyncStatement) {
+    nsDependentCString sql(::sqlite3_sql(mDBStatement));
+    int rc = mDBConnection->prepareStatement(mNativeConnection, sql,
+                                             &mAsyncStatement);
+    if (rc != SQLITE_OK) {
+      mDBConnection->RecordQueryStatus(rc);
+      *_stmt = nullptr;
+      return rc;
+    }
+
+    MOZ_LOG(gStorageLog, LogLevel::Debug,
+            ("Cloned statement 0x%p to 0x%p", mDBStatement, mAsyncStatement));
+  }
+
+  *_stmt = mAsyncStatement;
+  return SQLITE_OK;
+}
+
+nsresult Statement::getAsynchronousStatementData(StatementData& _data) {
+  if (!mDBStatement) return NS_ERROR_UNEXPECTED;
+
+  sqlite3_stmt* stmt;
+  int rc = getAsyncStatement(&stmt);
+  if (rc != SQLITE_OK) return convertResultCode(rc);
+
+  _data = StatementData(stmt, bindingParamsArray(), this);
+
+  return NS_OK;
+}
+
+already_AddRefed<mozIStorageBindingParams> Statement::newBindingParams(
+    mozIStorageBindingParamsArray* aOwner) {
+  nsCOMPtr<mozIStorageBindingParams> params = new BindingParams(aOwner, this);
+  return params.forget();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//// mozIStorageStatement
+
+// proxy to StorageBaseStatementInternal using its define helper.
+MIXIN_IMPL_STORAGEBASESTATEMENTINTERNAL(Statement, (void)0;)
+
+NS_IMETHODIMP
+Statement::Clone(mozIStorageStatement** _statement) {
+  RefPtr<Statement> statement(new Statement());
+  NS_ENSURE_TRUE(statement, NS_ERROR_OUT_OF_MEMORY);
+
+  nsAutoCString sql(::sqlite3_sql(mDBStatement));
+  nsresult rv = statement->initialize(mDBConnection, mNativeConnection, sql);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  statement.forget(_statement);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::Finalize() { return internalFinalize(false); }
+
+nsresult Statement::internalFinalize(bool aDestructing) {
+  if (!mDBStatement) return NS_OK;
+
+  int srv = SQLITE_OK;
+
+  {
+    // If the statement ends up being finalized twice, the second finalization
+    // would apply to a dangling pointer and may cause unexpected consequences.
+    // Thus we must be sure that the connection state won't change during this
+    // operation, to avoid racing with finalizations made by the closing
+    // connection.  See Connection::internalClose().
+    MutexAutoLock lockedScope(mDBConnection->sharedAsyncExecutionMutex);
+    if (!mDBConnection->isClosed(lockedScope)) {
+      MOZ_LOG(gStorageLog, LogLevel::Debug,
+              ("Finalizing statement '%s' during garbage-collection",
+               ::sqlite3_sql(mDBStatement)));
+      srv = ::sqlite3_finalize(mDBStatement);
+    }
+#ifdef DEBUG
+    else {
+      // The database connection is closed. The sqlite
+      // statement has either been finalized already by the connection
+      // or is about to be finalized by the connection.
+      //
+      // Finalizing it here would be useless and segfaultish.
+      //
+      // Note that we can't display the statement itself, as the data structure
+      // is not valid anymore. However, the address shown here should help
+      // developers correlate with the more complete debug message triggered
+      // by AsyncClose().
+
+      SmprintfPointer msg = ::mozilla::Smprintf(
+          "SQL statement (%p) should have been finalized"
+          " before garbage-collection. For more details on this statement, set"
+          " NSPR_LOG_MESSAGES=mozStorage:5 .",
+          mDBStatement);
+      NS_WARNING(msg.get());
+
+      // Use %s so we aren't exposing random strings to printf interpolation.
+      MOZ_LOG(gStorageLog, LogLevel::Warning, ("%s", msg.get()));
+    }
+#endif  // DEBUG
+  }
+
+  // This will be a no-op if the status has already been recorded or if this
+  // statement has not been executed. Async statements have their status
+  // tracked and recorded in StatementData.
+  MaybeRecordQueryStatus(srv, true);
+
+  mDBStatement = nullptr;
+
+  if (mAsyncStatement) {
+    // If the destructor called us, there are no pending async statements (they
+    // hold a reference to us) and we can/must just kill the statement directly.
+    if (aDestructing)
+      destructorAsyncFinalize();
+    else
+      asyncFinalize();
+  }
+
+  // Release the holders, so they can release the reference to us.
+  mStatementParamsHolder = nullptr;
+  mStatementRowHolder = nullptr;
+
+  return convertResultCode(srv);
+}
+
+NS_IMETHODIMP
+Statement::GetParameterCount(uint32_t* _parameterCount) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  *_parameterCount = mParamCount;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetParameterName(uint32_t aParamIndex, nsACString& _name) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+  ENSURE_INDEX_VALUE(aParamIndex, mParamCount);
+
+  const char* name =
+      ::sqlite3_bind_parameter_name(mDBStatement, aParamIndex + 1);
+  if (name == nullptr) {
+    // this thing had no name, so fake one
+    nsAutoCString fakeName(":");
+    fakeName.AppendInt(aParamIndex);
+    _name.Assign(fakeName);
+  } else {
+    _name.Assign(nsDependentCString(name));
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetParameterIndex(const nsACString& aName, uint32_t* _index) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  // We do not accept any forms of names other than ":name", but we need to add
+  // the colon for SQLite.
+  nsAutoCString name(":");
+  name.Append(aName);
+  int ind = ::sqlite3_bind_parameter_index(mDBStatement, name.get());
+  if (ind == 0)  // Named parameter not found.
+    return NS_ERROR_INVALID_ARG;
+
+  *_index = ind - 1;  // SQLite indexes are 1-based, we are 0-based.
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetColumnCount(uint32_t* _columnCount) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  *_columnCount = mResultColumnCount;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetColumnName(uint32_t aColumnIndex, nsACString& _name) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+  ENSURE_INDEX_VALUE(aColumnIndex, mResultColumnCount);
+
+  const char* cname = ::sqlite3_column_name(mDBStatement, aColumnIndex);
+  _name.Assign(nsDependentCString(cname));
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetColumnIndex(const nsACString& aName, uint32_t* _index) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  // Surprisingly enough, SQLite doesn't provide an API for this.  We have to
+  // determine it ourselves sadly.
+  for (uint32_t i = 0; i < mResultColumnCount; i++) {
+    if (mColumnNames[i].Equals(aName)) {
+      *_index = i;
+      return NS_OK;
+    }
+  }
+
+  return NS_ERROR_INVALID_ARG;
+}
+
+NS_IMETHODIMP
+Statement::Reset() {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+#ifdef DEBUG
+  MOZ_LOG(gStorageLog, LogLevel::Debug,
+          ("Resetting statement: '%s'", ::sqlite3_sql(mDBStatement)));
+
+  checkAndLogStatementPerformance(mDBStatement);
+#endif
+
+  mParamsArray = nullptr;
+  (void)sqlite3_reset(mDBStatement);
+  (void)sqlite3_clear_bindings(mDBStatement);
+
+  mExecuting = false;
+
+  // This will be a no-op if the status has already been recorded or if this
+  // statement has not been executed. Async statements have their status
+  // tracked and recorded in StatementData.
+  MaybeRecordQueryStatus(SQLITE_OK, true);
+  mHasExecuted = false;
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::BindParameters(mozIStorageBindingParamsArray* aParameters) {
+  NS_ENSURE_ARG_POINTER(aParameters);
+
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  BindingParamsArray* array = static_cast<BindingParamsArray*>(aParameters);
+  if (array->getOwner() != this) return NS_ERROR_UNEXPECTED;
+
+  if (array->length() == 0) return NS_ERROR_UNEXPECTED;
+
+  mParamsArray = array;
+  mParamsArray->lock();
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::Execute() {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  bool ret;
+  nsresult rv = ExecuteStep(&ret);
+  nsresult rv2 = Reset();
+
+  return NS_FAILED(rv) ? rv : rv2;
+}
+
+NS_IMETHODIMP
+Statement::ExecuteStep(bool* _moreResults) {
+  AUTO_PROFILER_LABEL("Statement::ExecuteStep", OTHER);
+
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  // Bind any parameters first before executing.
+  if (mParamsArray) {
+    // If we have more than one row of parameters to bind, they shouldn't be
+    // calling this method (and instead use executeAsync).
+    if (mParamsArray->length() != 1) return NS_ERROR_UNEXPECTED;
+
+    BindingParamsArray::iterator row = mParamsArray->begin();
+    nsCOMPtr<IStorageBindingParamsInternal> bindingInternal =
+        do_QueryInterface(*row);
+    nsCOMPtr<mozIStorageError> error = bindingInternal->bind(mDBStatement);
+    if (error) {
+      int32_t srv;
+      (void)error->GetResult(&srv);
+      return convertResultCode(srv);
+    }
+
+    // We have bound, so now we can clear our array.
+    mParamsArray = nullptr;
+  }
+  int srv = mDBConnection->stepStatement(mNativeConnection, mDBStatement);
+  mHasExecuted = true;
+  MaybeRecordQueryStatus(srv);
+
+  if (srv != SQLITE_ROW && srv != SQLITE_DONE &&
+      MOZ_LOG_TEST(gStorageLog, LogLevel::Debug)) {
+    nsAutoCString errStr;
+    (void)mDBConnection->GetLastErrorString(errStr);
+    MOZ_LOG(gStorageLog, LogLevel::Debug,
+            ("Statement::ExecuteStep error: %s", errStr.get()));
+  }
+
+  // SQLITE_ROW and SQLITE_DONE are non-errors
+  if (srv == SQLITE_ROW) {
+    // we got a row back
+    mExecuting = true;
+    *_moreResults = true;
+    return NS_OK;
+  } else if (srv == SQLITE_DONE) {
+    // statement is done (no row returned)
+    mExecuting = false;
+    *_moreResults = false;
+    return NS_OK;
+  } else if (srv == SQLITE_BUSY || srv == SQLITE_MISUSE) {
+    mExecuting = false;
+  } else if (mExecuting) {
+    MOZ_LOG(gStorageLog, LogLevel::Error,
+            ("SQLite error after mExecuting was true!"));
+    mExecuting = false;
+  }
+
+  return convertResultCode(srv);
+}
+
+NS_IMETHODIMP
+Statement::GetState(int32_t* _state) {
+  if (!mDBStatement)
+    *_state = MOZ_STORAGE_STATEMENT_INVALID;
+  else if (mExecuting)
+    *_state = MOZ_STORAGE_STATEMENT_EXECUTING;
+  else
+    *_state = MOZ_STORAGE_STATEMENT_READY;
+
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//// mozIStorageValueArray (now part of mozIStorageStatement too)
+
+NS_IMETHODIMP
+Statement::GetNumEntries(uint32_t* _length) {
+  *_length = mResultColumnCount;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetTypeOfIndex(uint32_t aIndex, int32_t* _type) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
+
+  if (!mExecuting) return NS_ERROR_UNEXPECTED;
+
+  int t = ::sqlite3_column_type(mDBStatement, aIndex);
+  switch (t) {
+    case SQLITE_INTEGER:
+      *_type = mozIStorageStatement::VALUE_TYPE_INTEGER;
+      break;
+    case SQLITE_FLOAT:
+      *_type = mozIStorageStatement::VALUE_TYPE_FLOAT;
+      break;
+    case SQLITE_TEXT:
+      *_type = mozIStorageStatement::VALUE_TYPE_TEXT;
+      break;
+    case SQLITE_BLOB:
+      *_type = mozIStorageStatement::VALUE_TYPE_BLOB;
+      break;
+    case SQLITE_NULL:
+      *_type = mozIStorageStatement::VALUE_TYPE_NULL;
+      break;
+    default:
+      return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetInt32(uint32_t aIndex, int32_t* _value) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
+
+  if (!mExecuting) return NS_ERROR_UNEXPECTED;
+
+  *_value = ::sqlite3_column_int(mDBStatement, aIndex);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetInt64(uint32_t aIndex, int64_t* _value) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
+
+  if (!mExecuting) return NS_ERROR_UNEXPECTED;
+
+  *_value = ::sqlite3_column_int64(mDBStatement, aIndex);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetDouble(uint32_t aIndex, double* _value) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
+
+  if (!mExecuting) return NS_ERROR_UNEXPECTED;
+
+  *_value = ::sqlite3_column_double(mDBStatement, aIndex);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetUTF8String(uint32_t aIndex, nsACString& _value) {
+  // Get type of Index will check aIndex for us, so we don't have to.
+  int32_t type;
+  nsresult rv = GetTypeOfIndex(aIndex, &type);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (type == mozIStorageStatement::VALUE_TYPE_NULL) {
+    // NULL columns should have IsVoid set to distinguish them from the empty
+    // string.
+    _value.SetIsVoid(true);
+  } else {
+    const char* value = reinterpret_cast<const char*>(
+        ::sqlite3_column_text(mDBStatement, aIndex));
+    _value.Assign(value, ::sqlite3_column_bytes(mDBStatement, aIndex));
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetString(uint32_t aIndex, nsAString& _value) {
+  // Get type of Index will check aIndex for us, so we don't have to.
+  int32_t type;
+  nsresult rv = GetTypeOfIndex(aIndex, &type);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (type == mozIStorageStatement::VALUE_TYPE_NULL) {
+    // NULL columns should have IsVoid set to distinguish them from the empty
+    // string.
+    _value.SetIsVoid(true);
+  } else {
+    const char16_t* value = static_cast<const char16_t*>(
+        ::sqlite3_column_text16(mDBStatement, aIndex));
+    _value.Assign(value, ::sqlite3_column_bytes16(mDBStatement, aIndex) /
+                             sizeof(char16_t));
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetVariant(uint32_t aIndex, nsIVariant** _value) {
+  if (!mDBStatement) {
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
+
+  if (!mExecuting) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  nsCOMPtr<nsIVariant> variant;
+  int type = ::sqlite3_column_type(mDBStatement, aIndex);
+  switch (type) {
+    case SQLITE_INTEGER:
+      variant =
+          new IntegerVariant(::sqlite3_column_int64(mDBStatement, aIndex));
+      break;
+    case SQLITE_FLOAT:
+      variant = new FloatVariant(::sqlite3_column_double(mDBStatement, aIndex));
+      break;
+    case SQLITE_TEXT: {
+      const char16_t* value = static_cast<const char16_t*>(
+          ::sqlite3_column_text16(mDBStatement, aIndex));
+      nsDependentString str(
+          value,
+          ::sqlite3_column_bytes16(mDBStatement, aIndex) / sizeof(char16_t));
+      variant = new TextVariant(str);
+      break;
+    }
+    case SQLITE_NULL:
+      variant = new NullVariant();
+      break;
+    case SQLITE_BLOB: {
+      int size = ::sqlite3_column_bytes(mDBStatement, aIndex);
+      const void* data = ::sqlite3_column_blob(mDBStatement, aIndex);
+      variant = new BlobVariant(std::pair<const void*, int>(data, size));
+      break;
+    }
+  }
+  NS_ENSURE_TRUE(variant, NS_ERROR_UNEXPECTED);
+
+  variant.forget(_value);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetBlob(uint32_t aIndex, uint32_t* _size, uint8_t** _blob) {
+  if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;
+
+  ENSURE_INDEX_VALUE(aIndex, mResultColumnCount);
+
+  if (!mExecuting) return NS_ERROR_UNEXPECTED;
+
+  int size = ::sqlite3_column_bytes(mDBStatement, aIndex);
+  void* blob = nullptr;
+  if (size) {
+    blob = moz_xmemdup(::sqlite3_column_blob(mDBStatement, aIndex), size);
+  }
+
+  *_blob = static_cast<uint8_t*>(blob);
+  *_size = size;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetBlobAsString(uint32_t aIndex, nsAString& aValue) {
+  return DoGetBlobAsString(this, aIndex, aValue);
+}
+
+NS_IMETHODIMP
+Statement::GetBlobAsUTF8String(uint32_t aIndex, nsACString& aValue) {
+  return DoGetBlobAsString(this, aIndex, aValue);
+}
+
+NS_IMETHODIMP
+Statement::GetSharedUTF8String(uint32_t aIndex, uint32_t* _byteLength,
+                               const char** _value) {
+  *_value = reinterpret_cast<const char*>(
+      ::sqlite3_column_text(mDBStatement, aIndex));
+  if (_byteLength) {
+    *_byteLength = ::sqlite3_column_bytes(mDBStatement, aIndex);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetSharedString(uint32_t aIndex, uint32_t* _byteLength,
+                           const char16_t** _value) {
+  *_value = static_cast<const char16_t*>(
+      ::sqlite3_column_text16(mDBStatement, aIndex));
+  if (_byteLength) {
+    *_byteLength = ::sqlite3_column_bytes16(mDBStatement, aIndex);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetSharedBlob(uint32_t aIndex, uint32_t* _byteLength,
+                         const uint8_t** _blob) {
+  *_blob =
+      static_cast<const uint8_t*>(::sqlite3_column_blob(mDBStatement, aIndex));
+  if (_byteLength) {
+    *_byteLength = ::sqlite3_column_bytes(mDBStatement, aIndex);
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+Statement::GetIsNull(uint32_t aIndex, bool* _isNull) {
+  // Get type of Index will check aIndex for us, so we don't have to.
+  int32_t type;
+  nsresult rv = GetTypeOfIndex(aIndex, &type);
+  NS_ENSURE_SUCCESS(rv, rv);
+  *_isNull = (type == mozIStorageStatement::VALUE_TYPE_NULL);
+  return NS_OK;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//// mozIStorageBindingParams
+
+BOILERPLATE_BIND_PROXIES(Statement,
+                         if (!mDBStatement) return NS_ERROR_NOT_INITIALIZED;)
+
+}  // namespace storage
+}  // namespace mozilla