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+# Copyright 2011 Canonical Ltd.
+#
+# This file is part of u1db.
+#
+# u1db is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License version 3
+# as published by the Free Software Foundation.
+#
+# u1db is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with u1db. If not, see <http://www.gnu.org/licenses/>.
+
+"""Test sqlite backend internals."""
+
+import os
+import time
+import threading
+
+from sqlite3 import dbapi2
+
+from u1db import (
+ errors,
+ query_parser,
+ )
+
+from leap.soledad.tests import u1db_tests as tests
+
+from u1db.backends import sqlite_backend
+from leap.soledad.tests.u1db_tests.test_backends import TestAlternativeDocument
+
+
+simple_doc = '{"key": "value"}'
+nested_doc = '{"key": "value", "sub": {"doc": "underneath"}}'
+
+
+class TestSQLiteDatabase(tests.TestCase):
+
+ def test_atomic_initialize(self):
+ tmpdir = self.createTempDir()
+ dbname = os.path.join(tmpdir, 'atomic.db')
+
+ t2 = None # will be a thread
+
+ class SQLiteDatabaseTesting(sqlite_backend.SQLiteDatabase):
+ _index_storage_value = "testing"
+
+ def __init__(self, dbname, ntry):
+ self._try = ntry
+ self._is_initialized_invocations = 0
+ super(SQLiteDatabaseTesting, self).__init__(dbname)
+
+ def _is_initialized(self, c):
+ res = super(SQLiteDatabaseTesting, self)._is_initialized(c)
+ if self._try == 1:
+ self._is_initialized_invocations += 1
+ if self._is_initialized_invocations == 2:
+ t2.start()
+ # hard to do better and have a generic test
+ time.sleep(0.05)
+ return res
+
+ outcome2 = []
+
+ def second_try():
+ try:
+ db2 = SQLiteDatabaseTesting(dbname, 2)
+ except Exception, e:
+ outcome2.append(e)
+ else:
+ outcome2.append(db2)
+
+ t2 = threading.Thread(target=second_try)
+ db1 = SQLiteDatabaseTesting(dbname, 1)
+ t2.join()
+
+ self.assertIsInstance(outcome2[0], SQLiteDatabaseTesting)
+ db2 = outcome2[0]
+ self.assertTrue(db2._is_initialized(db1._get_sqlite_handle().cursor()))
+
+
+class TestSQLitePartialExpandDatabase(tests.TestCase):
+
+ def setUp(self):
+ super(TestSQLitePartialExpandDatabase, self).setUp()
+ self.db = sqlite_backend.SQLitePartialExpandDatabase(':memory:')
+ self.db._set_replica_uid('test')
+
+ def test_create_database(self):
+ raw_db = self.db._get_sqlite_handle()
+ self.assertNotEqual(None, raw_db)
+
+ def test_default_replica_uid(self):
+ self.db = sqlite_backend.SQLitePartialExpandDatabase(':memory:')
+ self.assertIsNot(None, self.db._replica_uid)
+ self.assertEqual(32, len(self.db._replica_uid))
+ int(self.db._replica_uid, 16)
+
+ def test__close_sqlite_handle(self):
+ raw_db = self.db._get_sqlite_handle()
+ self.db._close_sqlite_handle()
+ self.assertRaises(dbapi2.ProgrammingError,
+ raw_db.cursor)
+
+ def test_create_database_initializes_schema(self):
+ raw_db = self.db._get_sqlite_handle()
+ c = raw_db.cursor()
+ c.execute("SELECT * FROM u1db_config")
+ config = dict([(r[0], r[1]) for r in c.fetchall()])
+ self.assertEqual({'sql_schema': '0', 'replica_uid': 'test',
+ 'index_storage': 'expand referenced'}, config)
+
+ # These tables must exist, though we don't care what is in them yet
+ c.execute("SELECT * FROM transaction_log")
+ c.execute("SELECT * FROM document")
+ c.execute("SELECT * FROM document_fields")
+ c.execute("SELECT * FROM sync_log")
+ c.execute("SELECT * FROM conflicts")
+ c.execute("SELECT * FROM index_definitions")
+
+ def test__parse_index(self):
+ self.db = sqlite_backend.SQLitePartialExpandDatabase(':memory:')
+ g = self.db._parse_index_definition('fieldname')
+ self.assertIsInstance(g, query_parser.ExtractField)
+ self.assertEqual(['fieldname'], g.field)
+
+ def test__update_indexes(self):
+ self.db = sqlite_backend.SQLitePartialExpandDatabase(':memory:')
+ g = self.db._parse_index_definition('fieldname')
+ c = self.db._get_sqlite_handle().cursor()
+ self.db._update_indexes('doc-id', {'fieldname': 'val'},
+ [('fieldname', g)], c)
+ c.execute('SELECT doc_id, field_name, value FROM document_fields')
+ self.assertEqual([('doc-id', 'fieldname', 'val')],
+ c.fetchall())
+
+ def test__set_replica_uid(self):
+ # Start from scratch, so that replica_uid isn't set.
+ self.db = sqlite_backend.SQLitePartialExpandDatabase(':memory:')
+ self.assertIsNot(None, self.db._real_replica_uid)
+ self.assertIsNot(None, self.db._replica_uid)
+ self.db._set_replica_uid('foo')
+ c = self.db._get_sqlite_handle().cursor()
+ c.execute("SELECT value FROM u1db_config WHERE name='replica_uid'")
+ self.assertEqual(('foo',), c.fetchone())
+ self.assertEqual('foo', self.db._real_replica_uid)
+ self.assertEqual('foo', self.db._replica_uid)
+ self.db._close_sqlite_handle()
+ self.assertEqual('foo', self.db._replica_uid)
+
+ def test__get_generation(self):
+ self.assertEqual(0, self.db._get_generation())
+
+ def test__get_generation_info(self):
+ self.assertEqual((0, ''), self.db._get_generation_info())
+
+ def test_create_index(self):
+ self.db.create_index('test-idx', "key")
+ self.assertEqual([('test-idx', ["key"])], self.db.list_indexes())
+
+ def test_create_index_multiple_fields(self):
+ self.db.create_index('test-idx', "key", "key2")
+ self.assertEqual([('test-idx', ["key", "key2"])],
+ self.db.list_indexes())
+
+ def test__get_index_definition(self):
+ self.db.create_index('test-idx', "key", "key2")
+ # TODO: How would you test that an index is getting used for an SQL
+ # request?
+ self.assertEqual(["key", "key2"],
+ self.db._get_index_definition('test-idx'))
+
+ def test_list_index_mixed(self):
+ # Make sure that we properly order the output
+ c = self.db._get_sqlite_handle().cursor()
+ # We intentionally insert the data in weird ordering, to make sure the
+ # query still gets it back correctly.
+ c.executemany("INSERT INTO index_definitions VALUES (?, ?, ?)",
+ [('idx-1', 0, 'key10'),
+ ('idx-2', 2, 'key22'),
+ ('idx-1', 1, 'key11'),
+ ('idx-2', 0, 'key20'),
+ ('idx-2', 1, 'key21')])
+ self.assertEqual([('idx-1', ['key10', 'key11']),
+ ('idx-2', ['key20', 'key21', 'key22'])],
+ self.db.list_indexes())
+
+ def test_no_indexes_no_document_fields(self):
+ self.db.create_doc_from_json(
+ '{"key1": "val1", "key2": "val2"}')
+ c = self.db._get_sqlite_handle().cursor()
+ c.execute("SELECT doc_id, field_name, value FROM document_fields"
+ " ORDER BY doc_id, field_name, value")
+ self.assertEqual([], c.fetchall())
+
+ def test_create_extracts_fields(self):
+ doc1 = self.db.create_doc_from_json('{"key1": "val1", "key2": "val2"}')
+ doc2 = self.db.create_doc_from_json('{"key1": "valx", "key2": "valy"}')
+ c = self.db._get_sqlite_handle().cursor()
+ c.execute("SELECT doc_id, field_name, value FROM document_fields"
+ " ORDER BY doc_id, field_name, value")
+ self.assertEqual([], c.fetchall())
+ self.db.create_index('test', 'key1', 'key2')
+ c.execute("SELECT doc_id, field_name, value FROM document_fields"
+ " ORDER BY doc_id, field_name, value")
+ self.assertEqual(sorted(
+ [(doc1.doc_id, "key1", "val1"),
+ (doc1.doc_id, "key2", "val2"),
+ (doc2.doc_id, "key1", "valx"),
+ (doc2.doc_id, "key2", "valy"),
+ ]), sorted(c.fetchall()))
+
+ def test_put_updates_fields(self):
+ self.db.create_index('test', 'key1', 'key2')
+ doc1 = self.db.create_doc_from_json(
+ '{"key1": "val1", "key2": "val2"}')
+ doc1.content = {"key1": "val1", "key2": "valy"}
+ self.db.put_doc(doc1)
+ c = self.db._get_sqlite_handle().cursor()
+ c.execute("SELECT doc_id, field_name, value FROM document_fields"
+ " ORDER BY doc_id, field_name, value")
+ self.assertEqual([(doc1.doc_id, "key1", "val1"),
+ (doc1.doc_id, "key2", "valy"),
+ ], c.fetchall())
+
+ def test_put_updates_nested_fields(self):
+ self.db.create_index('test', 'key', 'sub.doc')
+ doc1 = self.db.create_doc_from_json(nested_doc)
+ c = self.db._get_sqlite_handle().cursor()
+ c.execute("SELECT doc_id, field_name, value FROM document_fields"
+ " ORDER BY doc_id, field_name, value")
+ self.assertEqual([(doc1.doc_id, "key", "value"),
+ (doc1.doc_id, "sub.doc", "underneath"),
+ ], c.fetchall())
+
+ def test__ensure_schema_rollback(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/rollback.db'
+
+ class SQLitePartialExpandDbTesting(
+ sqlite_backend.SQLitePartialExpandDatabase):
+
+ def _set_replica_uid_in_transaction(self, uid):
+ super(SQLitePartialExpandDbTesting,
+ self)._set_replica_uid_in_transaction(uid)
+ if fail:
+ raise Exception()
+
+ db = SQLitePartialExpandDbTesting.__new__(SQLitePartialExpandDbTesting)
+ db._db_handle = dbapi2.connect(path) # db is there but not yet init-ed
+ fail = True
+ self.assertRaises(Exception, db._ensure_schema)
+ fail = False
+ db._initialize(db._db_handle.cursor())
+
+ def test__open_database(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/test.sqlite'
+ sqlite_backend.SQLitePartialExpandDatabase(path)
+ db2 = sqlite_backend.SQLiteDatabase._open_database(path)
+ self.assertIsInstance(db2, sqlite_backend.SQLitePartialExpandDatabase)
+
+ def test__open_database_with_factory(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/test.sqlite'
+ sqlite_backend.SQLitePartialExpandDatabase(path)
+ db2 = sqlite_backend.SQLiteDatabase._open_database(
+ path, document_factory=TestAlternativeDocument)
+ self.assertEqual(TestAlternativeDocument, db2._factory)
+
+ def test__open_database_non_existent(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/non-existent.sqlite'
+ self.assertRaises(errors.DatabaseDoesNotExist,
+ sqlite_backend.SQLiteDatabase._open_database, path)
+
+ def test__open_database_during_init(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/initialised.db'
+ db = sqlite_backend.SQLitePartialExpandDatabase.__new__(
+ sqlite_backend.SQLitePartialExpandDatabase)
+ db._db_handle = dbapi2.connect(path) # db is there but not yet init-ed
+ self.addCleanup(db.close)
+ observed = []
+
+ class SQLiteDatabaseTesting(sqlite_backend.SQLiteDatabase):
+ WAIT_FOR_PARALLEL_INIT_HALF_INTERVAL = 0.1
+
+ @classmethod
+ def _which_index_storage(cls, c):
+ res = super(SQLiteDatabaseTesting, cls)._which_index_storage(c)
+ db._ensure_schema() # init db
+ observed.append(res[0])
+ return res
+
+ db2 = SQLiteDatabaseTesting._open_database(path)
+ self.addCleanup(db2.close)
+ self.assertIsInstance(db2, sqlite_backend.SQLitePartialExpandDatabase)
+ self.assertEqual([None,
+ sqlite_backend.SQLitePartialExpandDatabase._index_storage_value],
+ observed)
+
+ def test__open_database_invalid(self):
+ class SQLiteDatabaseTesting(sqlite_backend.SQLiteDatabase):
+ WAIT_FOR_PARALLEL_INIT_HALF_INTERVAL = 0.1
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path1 = temp_dir + '/invalid1.db'
+ with open(path1, 'wb') as f:
+ f.write("")
+ self.assertRaises(dbapi2.OperationalError,
+ SQLiteDatabaseTesting._open_database, path1)
+ with open(path1, 'wb') as f:
+ f.write("invalid")
+ self.assertRaises(dbapi2.DatabaseError,
+ SQLiteDatabaseTesting._open_database, path1)
+
+ def test_open_database_existing(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/existing.sqlite'
+ sqlite_backend.SQLitePartialExpandDatabase(path)
+ db2 = sqlite_backend.SQLiteDatabase.open_database(path, create=False)
+ self.assertIsInstance(db2, sqlite_backend.SQLitePartialExpandDatabase)
+
+ def test_open_database_with_factory(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/existing.sqlite'
+ sqlite_backend.SQLitePartialExpandDatabase(path)
+ db2 = sqlite_backend.SQLiteDatabase.open_database(
+ path, create=False, document_factory=TestAlternativeDocument)
+ self.assertEqual(TestAlternativeDocument, db2._factory)
+
+ def test_open_database_create(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/new.sqlite'
+ sqlite_backend.SQLiteDatabase.open_database(path, create=True)
+ db2 = sqlite_backend.SQLiteDatabase.open_database(path, create=False)
+ self.assertIsInstance(db2, sqlite_backend.SQLitePartialExpandDatabase)
+
+ def test_open_database_non_existent(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/non-existent.sqlite'
+ self.assertRaises(errors.DatabaseDoesNotExist,
+ sqlite_backend.SQLiteDatabase.open_database, path,
+ create=False)
+
+ def test_delete_database_existent(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/new.sqlite'
+ db = sqlite_backend.SQLiteDatabase.open_database(path, create=True)
+ db.close()
+ sqlite_backend.SQLiteDatabase.delete_database(path)
+ self.assertRaises(errors.DatabaseDoesNotExist,
+ sqlite_backend.SQLiteDatabase.open_database, path,
+ create=False)
+
+ def test_delete_database_nonexistent(self):
+ temp_dir = self.createTempDir(prefix='u1db-test-')
+ path = temp_dir + '/non-existent.sqlite'
+ self.assertRaises(errors.DatabaseDoesNotExist,
+ sqlite_backend.SQLiteDatabase.delete_database, path)
+
+ def test__get_indexed_fields(self):
+ self.db.create_index('idx1', 'a', 'b')
+ self.assertEqual(set(['a', 'b']), self.db._get_indexed_fields())
+ self.db.create_index('idx2', 'b', 'c')
+ self.assertEqual(set(['a', 'b', 'c']), self.db._get_indexed_fields())
+
+ def test_indexed_fields_expanded(self):
+ self.db.create_index('idx1', 'key1')
+ doc1 = self.db.create_doc_from_json('{"key1": "val1", "key2": "val2"}')
+ self.assertEqual(set(['key1']), self.db._get_indexed_fields())
+ c = self.db._get_sqlite_handle().cursor()
+ c.execute("SELECT doc_id, field_name, value FROM document_fields"
+ " ORDER BY doc_id, field_name, value")
+ self.assertEqual([(doc1.doc_id, 'key1', 'val1')], c.fetchall())
+
+ def test_create_index_updates_fields(self):
+ doc1 = self.db.create_doc_from_json('{"key1": "val1", "key2": "val2"}')
+ self.db.create_index('idx1', 'key1')
+ self.assertEqual(set(['key1']), self.db._get_indexed_fields())
+ c = self.db._get_sqlite_handle().cursor()
+ c.execute("SELECT doc_id, field_name, value FROM document_fields"
+ " ORDER BY doc_id, field_name, value")
+ self.assertEqual([(doc1.doc_id, 'key1', 'val1')], c.fetchall())
+
+ def assertFormatQueryEquals(self, exp_statement, exp_args, definition,
+ values):
+ statement, args = self.db._format_query(definition, values)
+ self.assertEqual(exp_statement, statement)
+ self.assertEqual(exp_args, args)
+
+ def test__format_query(self):
+ self.assertFormatQueryEquals(
+ "SELECT d.doc_id, d.doc_rev, d.content, count(c.doc_rev) FROM "
+ "document d, document_fields d0 LEFT OUTER JOIN conflicts c ON "
+ "c.doc_id = d.doc_id WHERE d.doc_id = d0.doc_id AND d0.field_name "
+ "= ? AND d0.value = ? GROUP BY d.doc_id, d.doc_rev, d.content "
+ "ORDER BY d0.value;", ["key1", "a"],
+ ["key1"], ["a"])
+
+ def test__format_query2(self):
+ self.assertFormatQueryEquals(
+ 'SELECT d.doc_id, d.doc_rev, d.content, count(c.doc_rev) FROM '
+ 'document d, document_fields d0, document_fields d1, '
+ 'document_fields d2 LEFT OUTER JOIN conflicts c ON c.doc_id = '
+ 'd.doc_id WHERE d.doc_id = d0.doc_id AND d0.field_name = ? AND '
+ 'd0.value = ? AND d.doc_id = d1.doc_id AND d1.field_name = ? AND '
+ 'd1.value = ? AND d.doc_id = d2.doc_id AND d2.field_name = ? AND '
+ 'd2.value = ? GROUP BY d.doc_id, d.doc_rev, d.content ORDER BY '
+ 'd0.value, d1.value, d2.value;',
+ ["key1", "a", "key2", "b", "key3", "c"],
+ ["key1", "key2", "key3"], ["a", "b", "c"])
+
+ def test__format_query_wildcard(self):
+ self.assertFormatQueryEquals(
+ 'SELECT d.doc_id, d.doc_rev, d.content, count(c.doc_rev) FROM '
+ 'document d, document_fields d0, document_fields d1, '
+ 'document_fields d2 LEFT OUTER JOIN conflicts c ON c.doc_id = '
+ 'd.doc_id WHERE d.doc_id = d0.doc_id AND d0.field_name = ? AND '
+ 'd0.value = ? AND d.doc_id = d1.doc_id AND d1.field_name = ? AND '
+ 'd1.value GLOB ? AND d.doc_id = d2.doc_id AND d2.field_name = ? '
+ 'AND d2.value NOT NULL GROUP BY d.doc_id, d.doc_rev, d.content '
+ 'ORDER BY d0.value, d1.value, d2.value;',
+ ["key1", "a", "key2", "b*", "key3"], ["key1", "key2", "key3"],
+ ["a", "b*", "*"])
+
+ def assertFormatRangeQueryEquals(self, exp_statement, exp_args, definition,
+ start_value, end_value):
+ statement, args = self.db._format_range_query(
+ definition, start_value, end_value)
+ self.assertEqual(exp_statement, statement)
+ self.assertEqual(exp_args, args)
+
+ def test__format_range_query(self):
+ self.assertFormatRangeQueryEquals(
+ 'SELECT d.doc_id, d.doc_rev, d.content, count(c.doc_rev) FROM '
+ 'document d, document_fields d0, document_fields d1, '
+ 'document_fields d2 LEFT OUTER JOIN conflicts c ON c.doc_id = '
+ 'd.doc_id WHERE d.doc_id = d0.doc_id AND d0.field_name = ? AND '
+ 'd0.value >= ? AND d.doc_id = d1.doc_id AND d1.field_name = ? AND '
+ 'd1.value >= ? AND d.doc_id = d2.doc_id AND d2.field_name = ? AND '
+ 'd2.value >= ? AND d.doc_id = d0.doc_id AND d0.field_name = ? AND '
+ 'd0.value <= ? AND d.doc_id = d1.doc_id AND d1.field_name = ? AND '
+ 'd1.value <= ? AND d.doc_id = d2.doc_id AND d2.field_name = ? AND '
+ 'd2.value <= ? GROUP BY d.doc_id, d.doc_rev, d.content ORDER BY '
+ 'd0.value, d1.value, d2.value;',
+ ['key1', 'a', 'key2', 'b', 'key3', 'c', 'key1', 'p', 'key2', 'q',
+ 'key3', 'r'],
+ ["key1", "key2", "key3"], ["a", "b", "c"], ["p", "q", "r"])
+
+ def test__format_range_query_no_start(self):
+ self.assertFormatRangeQueryEquals(
+ 'SELECT d.doc_id, d.doc_rev, d.content, count(c.doc_rev) FROM '
+ 'document d, document_fields d0, document_fields d1, '
+ 'document_fields d2 LEFT OUTER JOIN conflicts c ON c.doc_id = '
+ 'd.doc_id WHERE d.doc_id = d0.doc_id AND d0.field_name = ? AND '
+ 'd0.value <= ? AND d.doc_id = d1.doc_id AND d1.field_name = ? AND '
+ 'd1.value <= ? AND d.doc_id = d2.doc_id AND d2.field_name = ? AND '
+ 'd2.value <= ? GROUP BY d.doc_id, d.doc_rev, d.content ORDER BY '
+ 'd0.value, d1.value, d2.value;',
+ ['key1', 'a', 'key2', 'b', 'key3', 'c'],
+ ["key1", "key2", "key3"], None, ["a", "b", "c"])
+
+ def test__format_range_query_no_end(self):
+ self.assertFormatRangeQueryEquals(
+ 'SELECT d.doc_id, d.doc_rev, d.content, count(c.doc_rev) FROM '
+ 'document d, document_fields d0, document_fields d1, '
+ 'document_fields d2 LEFT OUTER JOIN conflicts c ON c.doc_id = '
+ 'd.doc_id WHERE d.doc_id = d0.doc_id AND d0.field_name = ? AND '
+ 'd0.value >= ? AND d.doc_id = d1.doc_id AND d1.field_name = ? AND '
+ 'd1.value >= ? AND d.doc_id = d2.doc_id AND d2.field_name = ? AND '
+ 'd2.value >= ? GROUP BY d.doc_id, d.doc_rev, d.content ORDER BY '
+ 'd0.value, d1.value, d2.value;',
+ ['key1', 'a', 'key2', 'b', 'key3', 'c'],
+ ["key1", "key2", "key3"], ["a", "b", "c"], None)
+
+ def test__format_range_query_wildcard(self):
+ self.assertFormatRangeQueryEquals(
+ 'SELECT d.doc_id, d.doc_rev, d.content, count(c.doc_rev) FROM '
+ 'document d, document_fields d0, document_fields d1, '
+ 'document_fields d2 LEFT OUTER JOIN conflicts c ON c.doc_id = '
+ 'd.doc_id WHERE d.doc_id = d0.doc_id AND d0.field_name = ? AND '
+ 'd0.value >= ? AND d.doc_id = d1.doc_id AND d1.field_name = ? AND '
+ 'd1.value >= ? AND d.doc_id = d2.doc_id AND d2.field_name = ? AND '
+ 'd2.value NOT NULL AND d.doc_id = d0.doc_id AND d0.field_name = ? '
+ 'AND d0.value <= ? AND d.doc_id = d1.doc_id AND d1.field_name = ? '
+ 'AND (d1.value < ? OR d1.value GLOB ?) AND d.doc_id = d2.doc_id '
+ 'AND d2.field_name = ? AND d2.value NOT NULL GROUP BY d.doc_id, '
+ 'd.doc_rev, d.content ORDER BY d0.value, d1.value, d2.value;',
+ ['key1', 'a', 'key2', 'b', 'key3', 'key1', 'p', 'key2', 'q', 'q*',
+ 'key3'],
+ ["key1", "key2", "key3"], ["a", "b*", "*"], ["p", "q*", "*"])