phongo_execute.c
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phongo_execute.c
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	/*
	* Copyright 2022-present MongoDB, Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "bson/bson.h"
	#include "mongoc/mongoc.h"

	#include <php.h>
	#include <Zend/zend_exceptions.h>

	#include "php_array_api.h"

	#include "php_phongo.h"
	#include "phongo_error.h"
	#include "phongo_execute.h"
	#include "phongo_util.h"

	#include "MongoDB/BulkWriteCommand.h"
	#include "MongoDB/BulkWriteCommandResult.h"
	#include "MongoDB/Cursor.h"
	#include "MongoDB/Exception/BulkWriteCommandException.h"
	#include "MongoDB/ReadPreference.h"
	#include "MongoDB/Session.h"
	#include "MongoDB/WriteResult.h"

	static bson_t* create_wrapped_command_envelope(const char* db, bson_t* reply)
	{
	bson_t* tmp;
	size_t max_ns_len = strlen(db) + 5 + 1; /* db + ".$cmd" + '\0' */
	char* ns = emalloc(max_ns_len);

	snprintf(ns, max_ns_len, "%s.$cmd", db);
	tmp = BCON_NEW("cursor", "{", "id", BCON_INT64(0), "ns", BCON_UTF8(ns), "firstBatch", "[", BCON_DOCUMENT(reply), "]", "}");
	efree(ns);

	return tmp;
	}

	static zval* phongo_create_implicit_session(zval* manager)
	{
	mongoc_client_session_t* cs;
	zval* zsession;

	cs = mongoc_client_start_session(Z_MANAGER_OBJ_P(manager)->client, NULL, NULL);

	if (!cs) {
	return NULL;
	}

	zsession = ecalloc(1, sizeof(zval));

	phongo_session_init(zsession, manager, cs);

	return zsession;
	}

	/* Parses the "readConcern" option for an execute method. If mongoc_opts is not
	* NULL, the option will be appended. On error, false is returned and an
	* exception is thrown. */
	static bool phongo_parse_read_concern(zval* options, bson_t* mongoc_opts)
	{
	zval* option = NULL;
	mongoc_read_concern_t* read_concern;

	if (!options) {
	return true;
	}

	if (Z_TYPE_P(options) != IS_ARRAY) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected options to be array, %s given", zend_zval_type_name(options));
	return false;
	}

	option = php_array_fetchc_deref(options, "readConcern");

	if (!option) {
	return true;
	}

	if (Z_TYPE_P(option) != IS_OBJECT \|\| !instanceof_function(Z_OBJCE_P(option), php_phongo_readconcern_ce)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected \"readConcern\" option to be %s, %s given", ZSTR_VAL(php_phongo_readconcern_ce->name), zend_zval_type_name(option));
	return false;
	}

	read_concern = Z_READCONCERN_OBJ_P(option)->read_concern;

	if (mongoc_opts && !mongoc_read_concern_append(read_concern, mongoc_opts)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Error appending \"readConcern\" option");
	return false;
	}

	return true;
	}

	/* Parses the "readPreference" option for an execute method. If zreadPreference
	* is not NULL, it will be assigned to the option. On error, false is returned
	* and an exception is thrown. */
	bool phongo_parse_read_preference(zval* options, zval** zreadPreference)
	{
	zval* option = NULL;

	if (!options) {
	return true;
	}

	if (Z_TYPE_P(options) != IS_ARRAY) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected options to be array, %s given", zend_zval_type_name(options));
	return false;
	}

	option = php_array_fetchc_deref(options, "readPreference");

	if (!option) {
	return true;
	}

	if (Z_TYPE_P(option) != IS_OBJECT \|\| !instanceof_function(Z_OBJCE_P(option), php_phongo_readpreference_ce)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected \"readPreference\" option to be %s, %s given", ZSTR_VAL(php_phongo_readpreference_ce->name), zend_zval_type_name(option));
	return false;
	}

	if (zreadPreference) {
	*zreadPreference = option;
	}

	return true;
	}

	/* Parses the "session" option for an execute method. The client object should
	* correspond to the Manager executing the operation and will be used to ensure
	* that the session is correctly associated with that client. If mongoc_opts is
	* not NULL, the option will be appended. If zsession is not NULL, it will be
	* assigned to the option. On error, false is returned and an exception is
	* thrown. */
	bool phongo_parse_session(zval* options, mongoc_client_t* client, bson_t* mongoc_opts, zval** zsession)
	{
	zval* option = NULL;
	const mongoc_client_session_t* client_session;

	if (!options) {
	return true;
	}

	if (Z_TYPE_P(options) != IS_ARRAY) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected options to be array, %s given", zend_zval_type_name(options));
	return false;
	}

	option = php_array_fetchc_deref(options, "session");

	if (!option) {
	return true;
	}

	if (Z_TYPE_P(option) != IS_OBJECT \|\| !instanceof_function(Z_OBJCE_P(option), php_phongo_session_ce)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected \"session\" option to be %s, %s given", ZSTR_VAL(php_phongo_session_ce->name), zend_zval_type_name(option));
	return false;
	}

	client_session = Z_SESSION_OBJ_P(option)->client_session;

	if (client != mongoc_client_session_get_client(client_session)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Cannot use Session started from a different Manager");
	return false;
	}

	if (mongoc_opts && !mongoc_client_session_append(client_session, mongoc_opts, NULL)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Error appending \"session\" option");
	return false;
	}

	if (zsession) {
	*zsession = option;
	}

	return true;
	}

	/* Parses the "writeConcern" option for an execute method. If mongoc_opts is not
	* NULL, the option will be appended. If zwriteConcern is not NULL, it will be
	* assigned to the option. On error, false is returned and an exception is
	* thrown. */
	static bool phongo_parse_write_concern(zval* options, bson_t* mongoc_opts, zval** zwriteConcern)
	{
	zval* option = NULL;
	mongoc_write_concern_t* write_concern;

	if (!options) {
	return true;
	}

	if (Z_TYPE_P(options) != IS_ARRAY) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected options to be array, %s given", zend_zval_type_name(options));
	return false;
	}

	option = php_array_fetchc_deref(options, "writeConcern");

	if (!option) {
	return true;
	}

	if (Z_TYPE_P(option) != IS_OBJECT \|\| !instanceof_function(Z_OBJCE_P(option), php_phongo_writeconcern_ce)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Expected \"writeConcern\" option to be %s, %s given", ZSTR_VAL(php_phongo_writeconcern_ce->name), zend_zval_type_name(option));
	return false;
	}

	write_concern = Z_WRITECONCERN_OBJ_P(option)->write_concern;

	if (mongoc_opts && !mongoc_write_concern_append(write_concern, mongoc_opts)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Error appending \"writeConcern\" option");
	return false;
	}

	if (zwriteConcern) {
	*zwriteConcern = option;
	}

	return true;
	}

	bool phongo_execute_bulk_write(zval* manager, const char* namespace, php_phongo_bulkwrite_t* bulk_write, zval* options, uint32_t server_id, zval* return_value)
	{
	mongoc_client_t* client = NULL;
	bson_error_t error = { 0 };
	int success;
	bson_t reply = BSON_INITIALIZER;
	mongoc_bulk_operation_t* bulk = bulk_write->bulk;
	php_phongo_writeresult_t* writeresult;
	zval* zwriteConcern = NULL;
	zval* zsession = NULL;
	const mongoc_write_concern_t* write_concern = NULL;

	client = Z_MANAGER_OBJ_P(manager)->client;

	if (bulk_write->executed) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "BulkWrite objects may only be executed once and this instance has already been executed");
	return false;
	}

	if (!phongo_split_namespace(namespace, &bulk_write->database, &bulk_write->collection)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "%s: %s", "Invalid namespace provided", namespace);
	return false;
	}

	if (!phongo_parse_session(options, client, NULL, &zsession)) {
	/* Exception should already have been thrown */
	return false;
	}

	if (!phongo_parse_write_concern(options, NULL, &zwriteConcern)) {
	/* Exception should already have been thrown */
	return false;
	}

	/* If a write concern was not specified, libmongoc will use the client's
	* write concern; however, we should still fetch it for the write result.
	* Additionally, we need to check if an unacknowledged write concern would
	* conflict with an explicit session. */
	write_concern = zwriteConcern ? Z_WRITECONCERN_OBJ_P(zwriteConcern)->write_concern : mongoc_client_get_write_concern(client);

	if (zsession && !mongoc_write_concern_is_acknowledged(write_concern)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Cannot combine \"session\" option with an unacknowledged write concern");
	return false;
	}

	mongoc_bulk_operation_set_database(bulk, bulk_write->database);
	mongoc_bulk_operation_set_collection(bulk, bulk_write->collection);
	mongoc_bulk_operation_set_client(bulk, client);
	mongoc_bulk_operation_set_server_id(bulk, server_id);

	if (zsession) {
	ZVAL_ZVAL(&bulk_write->session, zsession, 1, 0);
	mongoc_bulk_operation_set_client_session(bulk, Z_SESSION_OBJ_P(zsession)->client_session);
	}

	if (zwriteConcern) {
	mongoc_bulk_operation_set_write_concern(bulk, Z_WRITECONCERN_OBJ_P(zwriteConcern)->write_concern);
	}

	success = mongoc_bulk_operation_execute(bulk, &reply, &error);
	bulk_write->executed = true;

	writeresult = phongo_writeresult_init(return_value, &reply, manager, mongoc_bulk_operation_get_server_id(bulk));
	writeresult->write_concern = mongoc_write_concern_copy(write_concern);

	/* A BulkWriteException is always thrown if mongoc_bulk_operation_execute()
	* fails to ensure that the write result is accessible. If the error does
	* not originate from the server (e.g. socket error), throw the appropriate
	* exception first. It will be included in BulkWriteException's message and
	* will also be accessible via Exception::getPrevious(). */
	if (!success) {
	if (error.domain != MONGOC_ERROR_SERVER && error.domain != MONGOC_ERROR_WRITE_CONCERN) {
	phongo_throw_exception_from_bson_error_t_and_reply(&error, &reply);
	}

	/* Argument errors occur before command execution, so there is no need
	* to layer this InvalidArgumentException behind a BulkWriteException.
	* In practice, this will be a "Cannot do an empty bulk write" error. */
	if (error.domain == MONGOC_ERROR_COMMAND && error.code == MONGOC_ERROR_COMMAND_INVALID_ARG) {
	goto cleanup;
	}

	if (EG(exception)) {
	char* message;

	(void) spprintf(&message, 0, "Bulk write failed due to previous %s: %s", PHONGO_ZVAL_EXCEPTION_NAME(EG(exception)), error.message);
	zend_throw_exception(php_phongo_bulkwriteexception_ce, message, 0);
	efree(message);
	} else {
	zend_throw_exception(php_phongo_bulkwriteexception_ce, error.message, error.code);
	}

	/* Ensure error labels are added to the final BulkWriteException. If a
	* previous exception was also thrown, error labels will already have
	* been added by phongo_throw_exception_from_bson_error_t_and_reply. */
	phongo_exception_add_error_labels(&reply);
	phongo_add_exception_prop(ZEND_STRL("writeResult"), return_value);
	}

	cleanup:
	bson_destroy(&reply);

	return success;
	}

	bool phongo_execute_bulkwritecommand(zval* manager, php_phongo_bulkwritecommand_t* bwc, zval* zoptions, uint32_t server_id, zval* return_value)
	{
	mongoc_client_t* client = NULL;
	mongoc_bulkwrite_t* bw = bwc->bw;
	mongoc_bulkwriteopts_t* bw_opts = NULL;
	mongoc_bulkwritereturn_t bw_ret = { 0 };
	zval* zsession = NULL;
	zval* zwriteConcern = NULL;
	const mongoc_write_concern_t* write_concern = NULL;
	bool success = true;

	client = Z_MANAGER_OBJ_P(manager)->client;

	if (!phongo_parse_session(zoptions, client, NULL, &zsession)) {
	/* Exception should already have been thrown */
	return false;
	}

	if (!phongo_parse_write_concern(zoptions, NULL, &zwriteConcern)) {
	/* Exception should already have been thrown */
	return false;
	}

	/* If a write concern was not specified, libmongoc will use the client's
	* write concern. Check if an unacknowledged write concern would conflict
	* with an explicit session. */
	write_concern = zwriteConcern ? Z_WRITECONCERN_OBJ_P(zwriteConcern)->write_concern : mongoc_client_get_write_concern(client);

	if (zsession && !mongoc_write_concern_is_acknowledged(write_concern)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Cannot combine \"session\" option with an unacknowledged write concern");
	return false;
	}

	mongoc_bulkwrite_set_client(bw, client);

	bw_opts = phongo_bwc_assemble_opts(bwc);
	mongoc_bulkwriteopts_set_serverid(bw_opts, server_id);

	if (zsession) {
	/* Save a reference to the session on the class struct to avoid leaving
	* a dangling pointer within mongoc_bulkwrite_t. */
	ZVAL_ZVAL(&bwc->session, zsession, 1, 0);
	mongoc_bulkwrite_set_session(bw, Z_SESSION_OBJ_P(zsession)->client_session);
	}

	if (zwriteConcern) {
	mongoc_bulkwriteopts_set_writeconcern(bw_opts, Z_WRITECONCERN_OBJ_P(zwriteConcern)->write_concern);
	}

	bw_ret = mongoc_bulkwrite_execute(bw, bw_opts);

	phongo_bulkwritecommandresult_init(return_value, bw_ret.res);

	/* Error handling for mongoc_bulkwrite_execute differs significantly from
	* mongoc_bulk_operation_execute.
	*
	* - There may or may not be a top-level error. Top-level errors include
	* both logical errors (invalid arguments) and runtime errors (e.g. server
	* selection failure). A bulk write failing due to write or write concern
	* errors will typically not have a top-level error.
	*
	* - There may or may not be an error reply document. This document could be
	* the response of a failed bulkWrite command, but it may also originate
	* from libmongoc (e.g. server selection, appending a session, iterating
	* BSON). This function only uses it to extrapolate error labels and it is
	* otherwise accessible to the user through BulkWriteCommandException.
	*
	* - InvalidArgumentException may be thrown directly for a basic top-level
	* error if there is no partial write result or error reply. Otherwise,
	* BulkWriteCommandException is thrown.
	*/
	if (bw_ret.exc) {
	success = false;
	bson_error_t error = { 0 };
	bool has_top_level_error = mongoc_bulkwriteexception_error(bw_ret.exc, &error);
	const bson_t* error_reply = mongoc_bulkwriteexception_errorreply(bw_ret.exc);

	/* Throw an exception if there is a top-level error and it does not
	* originate from the server. Assuming we do not return early for an
	* InvalidArgumentException, this first exception will be accessible
	* via Exception::getPrevious().
	*
	* TODO: MONGOC_ERROR_WRITE_CONCERN should never be reported as a
	* top-level error by mongoc_bulkwrite_execute, so consider removing.
	*/
	if (has_top_level_error && error.domain != MONGOC_ERROR_SERVER && error.domain != MONGOC_ERROR_WRITE_CONCERN) {
	phongo_throw_exception_from_bson_error_t_and_reply(&error, error_reply);
	}

	/* Unlike mongoc_bulk_operation_execute, mongoc_bulkwrite_execute may
	* report MONGOC_ERROR_COMMAND_INVALID_ARG alongside a partial result
	* (CDRIVER-5842). Throw InvalidArgumentException directly iff there is
	* neither a partial write result nor an error reply (we can assume
	* there are no write or write concern errors for this case). */
	if (EG(exception) && EG(exception)->ce == php_phongo_invalidargumentexception_ce && !bw_ret.res && bson_empty(error_reply)) {
	goto cleanup;
	}

	if (EG(exception)) {
	char* message;

	(void) spprintf(&message, 0, "Bulk write failed due to previous %s: %s", PHONGO_ZVAL_EXCEPTION_NAME(EG(exception)), error.message);
	zend_throw_exception(php_phongo_bulkwritecommandexception_ce, message, 0);
	efree(message);
	} else {
	zend_throw_exception(php_phongo_bulkwritecommandexception_ce, has_top_level_error ? error.message : "Bulk write failed", error.code);
	}

	/* Initialize BulkWriteCommandException properties. Although a
	* BulkWriteCommandResult is always returned on success, the partial
	* result reported via the exception may be null. */
	php_phongo_bulkwritecommandexception_init_props(EG(exception), bw_ret.exc, bw_ret.res ? return_value : NULL);

	/* Ensure error labels are added to the final BulkWriteCommandException.
	* If RuntimeException was previously thrown, labels may also have been
	* added to it by phongo_throw_exception_from_bson_error_t_and_reply. */
	phongo_exception_add_error_labels(error_reply);
	}

	cleanup:
	mongoc_bulkwriteopts_destroy(bw_opts);
	mongoc_bulkwriteresult_destroy(bw_ret.res);
	mongoc_bulkwriteexception_destroy(bw_ret.exc);

	return success;
	}

	bool phongo_execute_command(zval* manager, php_phongo_command_type_t type, const char* db, zval* zcommand, zval* options, uint32_t server_id, zval* return_value)
	{
	mongoc_client_t* client;
	const php_phongo_command_t* command;
	bson_iter_t iter;
	bson_t reply;
	bson_error_t error = { 0 };
	bson_t opts = BSON_INITIALIZER;
	mongoc_cursor_t* cmd_cursor;
	zval* zreadPreference = NULL;
	zval* zsession = NULL;
	bool result = false;
	bool free_reply = false;
	bool free_zsession = false;
	bool is_unacknowledged_write_concern = false;

	client = Z_MANAGER_OBJ_P(manager)->client;
	command = Z_COMMAND_OBJ_P(zcommand);

	if ((type & PHONGO_OPTION_READ_CONCERN) && !phongo_parse_read_concern(options, &opts)) {
	/* Exception should already have been thrown */
	goto cleanup;
	}

	if ((type & PHONGO_OPTION_READ_PREFERENCE) && !phongo_parse_read_preference(options, &zreadPreference)) {
	/* Exception should already have been thrown */
	goto cleanup;
	}

	if (!phongo_parse_session(options, client, &opts, &zsession)) {
	/* Exception should already have been thrown */
	goto cleanup;
	}

	if (type & PHONGO_OPTION_WRITE_CONCERN) {
	zval* zwriteConcern = NULL;

	if (!phongo_parse_write_concern(options, &opts, &zwriteConcern)) {
	/* Exception should already have been thrown */
	goto cleanup;
	}

	/* Determine if the explicit or inherited write concern is
	* unacknowledged so that we can ensure it does not conflict with an
	* explicit or implicit session. */
	if (zwriteConcern) {
	is_unacknowledged_write_concern = !mongoc_write_concern_is_acknowledged(Z_WRITECONCERN_OBJ_P(zwriteConcern)->write_concern);
	} else if (type != PHONGO_COMMAND_RAW) {
	is_unacknowledged_write_concern = !mongoc_write_concern_is_acknowledged(mongoc_client_get_write_concern(client));
	}
	}

	if (zsession && is_unacknowledged_write_concern) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Cannot combine \"session\" option with an unacknowledged write concern");
	goto cleanup;
	}

	/* If an explicit session was not provided and the effective write concern
	* is not unacknowledged, attempt to create an implicit client session
	* (ignoring any errors). */
	if (!zsession && !is_unacknowledged_write_concern) {
	zsession = phongo_create_implicit_session(manager);

	if (zsession) {
	free_zsession = true;

	if (!mongoc_client_session_append(Z_SESSION_OBJ_P(zsession)->client_session, &opts, NULL)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Error appending implicit \"sessionId\" option");
	goto cleanup;
	}
	}
	}

	if (!BSON_APPEND_INT32(&opts, "serverId", server_id)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Error appending \"serverId\" option");
	goto cleanup;
	}

	/* Although "opts" already always includes the serverId option, the read
	* preference is added to the command parts, which is relevant for mongos
	* command construction. */
	switch (type) {
	case PHONGO_COMMAND_RAW:
	result = mongoc_client_command_with_opts(client, db, command->bson, phongo_read_preference_from_zval(zreadPreference), &opts, &reply, &error);
	break;
	case PHONGO_COMMAND_READ:
	result = mongoc_client_read_command_with_opts(client, db, command->bson, phongo_read_preference_from_zval(zreadPreference), &opts, &reply, &error);
	break;
	case PHONGO_COMMAND_WRITE:
	result = mongoc_client_write_command_with_opts(client, db, command->bson, &opts, &reply, &error);
	break;
	case PHONGO_COMMAND_READ_WRITE:
	/* We can pass NULL as readPreference, as this argument was added historically, but has no function */
	result = mongoc_client_read_write_command_with_opts(client, db, command->bson, NULL, &opts, &reply, &error);
	break;
	default:
	/* Should never happen, but if it does: exception */
	phongo_throw_exception(PHONGO_ERROR_LOGIC, "Type '%d' should never have been passed to phongo_execute_command, please file a bug report", type);
	goto cleanup;
	}

	free_reply = true;

	if (!result) {
	phongo_throw_exception_from_bson_error_t_and_reply(&error, &reply);
	goto cleanup;
	}

	/* According to mongoc_cursor_new_from_command_reply_with_opts(), the reply
	* bson_t is ultimately destroyed on both success and failure. */
	if (bson_iter_init_find(&iter, &reply, "cursor") && BSON_ITER_HOLDS_DOCUMENT(&iter)) {
	bson_t initial_reply = BSON_INITIALIZER;
	bson_t cursor_opts = BSON_INITIALIZER;
	bson_iter_t iter;
	bson_error_t error = { 0 };

	bson_copy_to(&reply, &initial_reply);

	bson_append_int32(&cursor_opts, "serverId", -1, server_id);

	if (command->max_await_time_ms) {
	bson_append_bool(&cursor_opts, "awaitData", -1, 1);
	bson_append_int64(&cursor_opts, "maxAwaitTimeMS", -1, command->max_await_time_ms);
	bson_append_bool(&cursor_opts, "tailable", -1, 1);
	}

	if (command->batch_size) {
	bson_append_int64(&cursor_opts, "batchSize", -1, command->batch_size);
	}

	if (bson_iter_init(&iter, command->bson) && bson_iter_find(&iter, "comment")) {
	bson_append_value(&cursor_opts, "comment", -1, bson_iter_value(&iter));
	}

	if (zsession && !mongoc_client_session_append(Z_SESSION_OBJ_P(zsession)->client_session, &cursor_opts, &error)) {
	phongo_throw_exception_from_bson_error_t(&error);
	bson_destroy(&initial_reply);
	bson_destroy(&cursor_opts);
	result = false;
	goto cleanup;
	}

	cmd_cursor = mongoc_cursor_new_from_command_reply_with_opts(client, &initial_reply, &cursor_opts);
	bson_destroy(&cursor_opts);
	} else {
	bson_t cursor_opts = BSON_INITIALIZER;
	bson_t* wrapped_reply = create_wrapped_command_envelope(db, &reply);

	bson_append_int32(&cursor_opts, "serverId", -1, server_id);
	cmd_cursor = mongoc_cursor_new_from_command_reply_with_opts(client, wrapped_reply, &cursor_opts);
	bson_destroy(&cursor_opts);
	}

	phongo_cursor_init_for_command(return_value, manager, cmd_cursor, db, zcommand, zreadPreference, zsession);

	cleanup:
	bson_destroy(&opts);

	if (free_reply) {
	bson_destroy(&reply);
	}

	if (free_zsession) {
	zval_ptr_dtor(zsession);
	efree(zsession);
	}

	return result;
	}

	bool phongo_execute_query(zval* manager, const char* namespace, zval* zquery, zval* options, uint32_t server_id, zval* return_value)
	{
	mongoc_client_t* client;
	const php_phongo_query_t* query;
	bson_t opts = BSON_INITIALIZER;
	mongoc_cursor_t* cursor;
	char* dbname;
	char* collname;
	mongoc_collection_t* collection;
	zval* zreadPreference = NULL;
	zval* zsession = NULL;

	client = Z_MANAGER_OBJ_P(manager)->client;

	if (!phongo_split_namespace(namespace, &dbname, &collname)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "%s: %s", "Invalid namespace provided", namespace);
	return false;
	}
	collection = mongoc_client_get_collection(client, dbname, collname);
	efree(dbname);
	efree(collname);

	query = Z_QUERY_OBJ_P(zquery);

	bson_copy_to(query->opts, &opts);

	if (query->read_concern) {
	mongoc_collection_set_read_concern(collection, query->read_concern);
	}

	if (!phongo_parse_read_preference(options, &zreadPreference)) {
	/* Exception should already have been thrown */
	mongoc_collection_destroy(collection);
	bson_destroy(&opts);
	return false;
	}

	if (!phongo_parse_session(options, client, &opts, &zsession)) {
	/* Exception should already have been thrown */
	mongoc_collection_destroy(collection);
	bson_destroy(&opts);
	return false;
	}

	if (!BSON_APPEND_INT32(&opts, "serverId", server_id)) {
	phongo_throw_exception(PHONGO_ERROR_INVALID_ARGUMENT, "Error appending \"serverId\" option");
	mongoc_collection_destroy(collection);
	bson_destroy(&opts);
	return false;
	}

	cursor = mongoc_collection_find_with_opts(collection, query->filter, &opts, phongo_read_preference_from_zval(zreadPreference));
	mongoc_collection_destroy(collection);
	bson_destroy(&opts);

	/* maxAwaitTimeMS must be set before the cursor is sent */
	if (query->max_await_time_ms) {
	mongoc_cursor_set_max_await_time_ms(cursor, query->max_await_time_ms);
	}

	/* Initialize the cursor and advance it once */
	if (!phongo_cursor_init_for_query(return_value, manager, cursor, namespace, zquery, zreadPreference, zsession)) {
	/* Exception should already have been thrown */
	mongoc_cursor_destroy(cursor);
	return false;
	}

	return true;
	}

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