1210 lines
27 KiB
C++
1210 lines
27 KiB
C++
/*
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* Copyright (c) 2016 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include "internal/query_classifier.h"
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#include <inttypes.h>
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#include <algorithm>
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#include <atomic>
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#include <random>
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#include <unordered_map>
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#include <maxscale/alloc.h>
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#include <maxscale/atomic.h>
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#include <maxscale/log_manager.h>
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#include <maxscale/modutil.hh>
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#include <maxscale/pcre2.h>
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#include <maxscale/platform.h>
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#include <maxscale/utils.h>
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#include "internal/modules.h"
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#include "internal/trxboundaryparser.hh"
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//#define QC_TRACE_ENABLED
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#undef QC_TRACE_ENABLED
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#if defined(QC_TRACE_ENABLED)
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#define QC_TRACE() MXS_NOTICE(__func__)
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#else
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#define QC_TRACE()
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#endif
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namespace
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{
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struct type_name_info
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{
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const char* name;
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size_t name_len;
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};
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const char DEFAULT_QC_NAME[] = "qc_sqlite";
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const char QC_TRX_PARSE_USING[] = "QC_TRX_PARSE_USING";
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class ThisUnit
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{
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public:
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ThisUnit()
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: classifier(nullptr)
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, qc_trx_parse_using(QC_TRX_PARSE_USING_PARSER)
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, qc_sql_mode(QC_SQL_MODE_DEFAULT)
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, m_cache_max_size(std::numeric_limits<int64_t>::max())
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{
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}
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ThisUnit(const ThisUnit&) = delete;
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ThisUnit& operator=(const ThisUnit&) = delete;
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QUERY_CLASSIFIER* classifier;
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qc_trx_parse_using_t qc_trx_parse_using;
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qc_sql_mode_t qc_sql_mode;
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int64_t cache_max_size() const
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{
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// In principle, std::memory_order_acquire should be used here, but that causes
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// a performance penalty of ~5% when running a sysbench test.
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return m_cache_max_size.load(std::memory_order_relaxed);
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}
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void set_cache_max_size(int64_t cache_max_size)
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{
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// In principle, std::memory_order_release should be used here.
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m_cache_max_size.store(cache_max_size, std::memory_order_relaxed);
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}
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private:
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std::atomic<int64_t> m_cache_max_size;
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};
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static ThisUnit this_unit;
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class QCInfoCache;
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static thread_local struct
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{
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QCInfoCache* pInfo_cache;
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} this_thread =
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{
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nullptr
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};
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/**
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* @class QCInfoCache
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*
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* An instance of this class maintains a mapping from a canonical statement to
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* the QC_STMT_INFO object created by the actual query classifier.
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*/
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class QCInfoCache
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{
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public:
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QCInfoCache(const QCInfoCache&) = delete;
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QCInfoCache& operator=(const QCInfoCache&) = delete;
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QCInfoCache()
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: m_reng(m_rdev())
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{
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memset(&m_stats, 0, sizeof(m_stats));
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}
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~QCInfoCache()
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{
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ss_dassert(this_unit.classifier);
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for (auto a : m_infos)
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{
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this_unit.classifier->qc_info_close(a.second.pInfo);
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}
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}
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QC_STMT_INFO* peek(const std::string& canonical_stmt) const
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{
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auto i = m_infos.find(canonical_stmt);
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return i != m_infos.end() ? i->second.pInfo : nullptr;
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}
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QC_STMT_INFO* get(const std::string& canonical_stmt)
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{
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QC_STMT_INFO* pInfo = nullptr;
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auto i = m_infos.find(canonical_stmt);
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if (i != m_infos.end())
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{
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const Entry& entry = i->second;
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if (entry.sql_mode == this_unit.qc_sql_mode)
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{
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ss_dassert(this_unit.classifier);
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this_unit.classifier->qc_info_dup(entry.pInfo);
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pInfo = entry.pInfo;
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++m_stats.hits;
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}
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else
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{
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// If the sql_mode has changed, we discard the existing result.
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erase(i);
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++m_stats.misses;
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}
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}
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else
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{
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++m_stats.misses;
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}
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return pInfo;
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}
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void insert(const std::string& canonical_stmt, QC_STMT_INFO* pInfo)
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{
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ss_dassert(peek(canonical_stmt) == nullptr);
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ss_dassert(this_unit.classifier);
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int64_t cache_max_size = this_unit.cache_max_size();
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int64_t size = canonical_stmt.size();
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if (size <= cache_max_size)
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{
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int64_t required_space = (m_stats.size + size) - cache_max_size;
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if (required_space > 0)
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{
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make_space(required_space);
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}
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if (m_stats.size + size <= cache_max_size)
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{
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this_unit.classifier->qc_info_dup(pInfo);
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m_infos.emplace(canonical_stmt, Entry(pInfo, this_unit.qc_sql_mode));
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++m_stats.inserts;
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}
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}
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}
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void get_stats(QC_CACHE_STATS* pStats)
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{
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*pStats = m_stats;
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}
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private:
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struct Entry
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{
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Entry(QC_STMT_INFO* pInfo, qc_sql_mode_t sql_mode)
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: pInfo(pInfo)
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, sql_mode(sql_mode)
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{
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}
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QC_STMT_INFO* pInfo;
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qc_sql_mode_t sql_mode;
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};
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typedef std::unordered_map<std::string, Entry> InfosByStmt;
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void erase(InfosByStmt::iterator& i)
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{
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ss_dassert(i != m_infos.end());
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m_stats.size -= i->first.size();
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ss_dassert(this_unit.classifier);
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this_unit.classifier->qc_info_close(i->second.pInfo);
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m_infos.erase(i);
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++m_stats.evictions;
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}
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bool erase(const std::string& canonical_stmt)
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{
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bool erased = false;
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auto i = m_infos.find(canonical_stmt);
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ss_dassert(i != m_infos.end());
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if (i != m_infos.end())
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{
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erase(i);
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erased = true;
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}
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return erased;
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}
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void make_space(int64_t required_space)
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{
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int64_t freed_space = 0;
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std::uniform_int_distribution<> dis(0, m_infos.bucket_count() - 1);
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while ((freed_space < required_space) && !m_infos.empty())
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{
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freed_space += evict(dis);
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}
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}
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int64_t evict(std::uniform_int_distribution<>& dis)
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{
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int64_t freed_space = 0;
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int bucket = dis(m_reng);
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ss_dassert((bucket >= 0) && (bucket < static_cast<int>(m_infos.bucket_count())));
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auto i = m_infos.begin(bucket);
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// We just remove the first entry in the bucket. In the general case
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// there will be just one.
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if (i != m_infos.end(bucket))
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{
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freed_space += i->first.size();
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ss_debug(bool erased =) erase(i->first);
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ss_dassert(erased);
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}
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return freed_space;
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}
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InfosByStmt m_infos;
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QC_CACHE_STATS m_stats;
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std::random_device m_rdev;
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std::mt19937 m_reng;
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};
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bool use_cached_result()
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{
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return this_unit.cache_max_size() != 0;
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}
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bool has_not_been_parsed(GWBUF* pStmt)
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{
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// A GWBUF has not been parsed, if it does not have a parsing info object attached.
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return gwbuf_get_buffer_object_data(pStmt, GWBUF_PARSING_INFO) == nullptr;
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}
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void info_object_close(void* pData)
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{
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ss_dassert(this_unit.classifier);
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this_unit.classifier->qc_info_close(static_cast<QC_STMT_INFO*>(pData));
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}
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/**
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* @class QCInfoCacheScope
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*
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* QCInfoCacheScope is somewhat like a guard or RAII class that
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* in the constructor
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* - figures out whether the query classification cache should be used,
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* - checks whether the classification result already exists, and
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* - if it does attaches it to the GWBUF
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* and in the destructor
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* - if the query classification result was not already present,
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* stores the result it in the cache.
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*/
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class QCInfoCacheScope
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{
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public:
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QCInfoCacheScope(const QCInfoCacheScope&) = delete;
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QCInfoCacheScope& operator=(const QCInfoCacheScope&) = delete;
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QCInfoCacheScope(GWBUF* pStmt)
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: m_pStmt(pStmt)
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{
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if (use_cached_result() && has_not_been_parsed(m_pStmt))
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{
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m_canonical = mxs::get_canonical(m_pStmt);
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QC_STMT_INFO* pInfo = this_thread.pInfo_cache->get(m_canonical);
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if (pInfo)
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{
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gwbuf_add_buffer_object(m_pStmt, GWBUF_PARSING_INFO, pInfo, info_object_close);
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m_canonical.clear(); // Signals that nothing needs to be added in the destructor.
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}
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}
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}
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~QCInfoCacheScope()
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{
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if (!m_canonical.empty())
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{
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void* pData = gwbuf_get_buffer_object_data(m_pStmt, GWBUF_PARSING_INFO);
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ss_dassert(pData);
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QC_STMT_INFO* pInfo = static_cast<QC_STMT_INFO*>(pData);
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this_thread.pInfo_cache->insert(m_canonical, pInfo);
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}
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}
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private:
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GWBUF* m_pStmt;
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std::string m_canonical;
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};
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}
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bool qc_setup(const QC_CACHE_PROPERTIES* cache_properties,
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qc_sql_mode_t sql_mode,
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const char* plugin_name, const char* plugin_args)
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{
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QC_TRACE();
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ss_dassert(!this_unit.classifier);
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if (!plugin_name || (*plugin_name == 0))
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{
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MXS_NOTICE("No query classifier specified, using default '%s'.", DEFAULT_QC_NAME);
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plugin_name = DEFAULT_QC_NAME;
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}
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int32_t rv = QC_RESULT_ERROR;
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this_unit.classifier = qc_load(plugin_name);
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if (this_unit.classifier)
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{
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rv = this_unit.classifier->qc_setup(sql_mode, plugin_args);
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if (rv == QC_RESULT_OK)
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{
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this_unit.qc_sql_mode = sql_mode;
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int64_t cache_max_size = (cache_properties ? cache_properties->max_size : 0);
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ss_dassert(cache_max_size >= 0);
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if (cache_max_size)
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{
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MXS_NOTICE("Query classification results are cached and reused, "
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"cache max size: %" PRIi64 "", cache_max_size);
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}
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else
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{
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MXS_NOTICE("Query classification results are not cached.");
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}
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this_unit.set_cache_max_size(cache_max_size);
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}
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else
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{
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qc_unload(this_unit.classifier);
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}
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}
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return (rv == QC_RESULT_OK) ? true : false;
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}
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bool qc_process_init(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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const char* parse_using = getenv(QC_TRX_PARSE_USING);
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if (parse_using)
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{
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if (strcmp(parse_using, "QC_TRX_PARSE_USING_QC") == 0)
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{
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this_unit.qc_trx_parse_using = QC_TRX_PARSE_USING_QC;
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MXS_NOTICE("Transaction detection using QC.");
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}
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else if (strcmp(parse_using, "QC_TRX_PARSE_USING_PARSER") == 0)
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{
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this_unit.qc_trx_parse_using = QC_TRX_PARSE_USING_PARSER;
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MXS_NOTICE("Transaction detection using custom PARSER.");
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}
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else
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{
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MXS_NOTICE("QC_TRX_PARSE_USING set, but the value %s is not known. "
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"Parsing using QC.", parse_using);
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}
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}
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bool rc = qc_thread_init(QC_INIT_SELF);
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if (rc)
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{
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if (kind & QC_INIT_PLUGIN)
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{
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rc = this_unit.classifier->qc_process_init() == 0;
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if (!rc)
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{
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qc_thread_end(QC_INIT_SELF);
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}
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}
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}
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return rc;
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}
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void qc_process_end(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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if (kind & QC_INIT_PLUGIN)
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{
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this_unit.classifier->qc_process_end();
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}
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qc_thread_end(QC_INIT_SELF);
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}
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QUERY_CLASSIFIER* qc_load(const char* plugin_name)
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{
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void* module = load_module(plugin_name, MODULE_QUERY_CLASSIFIER);
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if (module)
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{
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MXS_INFO("%s loaded.", plugin_name);
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}
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else
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{
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MXS_ERROR("Could not load %s.", plugin_name);
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}
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return (QUERY_CLASSIFIER*) module;
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}
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void qc_unload(QUERY_CLASSIFIER* classifier)
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{
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// TODO: The module loading/unloading needs an overhaul before we
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// TODO: actually can unload something.
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classifier = NULL;
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}
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bool qc_thread_init(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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bool rc = false;
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this_thread.pInfo_cache = new (std::nothrow) QCInfoCache;
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if (this_thread.pInfo_cache)
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{
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rc = true;
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if (kind & QC_INIT_PLUGIN)
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{
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rc = this_unit.classifier->qc_thread_init() == 0;
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}
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if (!rc)
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{
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delete this_thread.pInfo_cache;
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this_thread.pInfo_cache = nullptr;
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}
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}
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return rc;
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}
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void qc_thread_end(uint32_t kind)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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if (kind & QC_INIT_PLUGIN)
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{
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this_unit.classifier->qc_thread_end();
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}
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delete this_thread.pInfo_cache;
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this_thread.pInfo_cache = nullptr;
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}
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qc_parse_result_t qc_parse(GWBUF* query, uint32_t collect)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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int32_t result = QC_QUERY_INVALID;
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QCInfoCacheScope scope(query);
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this_unit.classifier->qc_parse(query, collect, &result);
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return (qc_parse_result_t)result;
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}
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uint32_t qc_get_type_mask(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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uint32_t type_mask = QUERY_TYPE_UNKNOWN;
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QCInfoCacheScope scope(query);
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this_unit.classifier->qc_get_type_mask(query, &type_mask);
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return type_mask;
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}
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qc_query_op_t qc_get_operation(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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int32_t op = QUERY_OP_UNDEFINED;
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QCInfoCacheScope scope(query);
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this_unit.classifier->qc_get_operation(query, &op);
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return (qc_query_op_t)op;
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}
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char* qc_get_created_table_name(GWBUF* query)
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{
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QC_TRACE();
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ss_dassert(this_unit.classifier);
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char* name = NULL;
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QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_get_created_table_name(query, &name);
|
|
|
|
return name;
|
|
}
|
|
|
|
bool qc_is_drop_table_query(GWBUF* query)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
int32_t is_drop_table = 0;
|
|
|
|
QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_is_drop_table_query(query, &is_drop_table);
|
|
|
|
return (is_drop_table != 0) ? true : false;
|
|
}
|
|
|
|
char** qc_get_table_names(GWBUF* query, int* tblsize, bool fullnames)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
char** names = NULL;
|
|
*tblsize = 0;
|
|
|
|
QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_get_table_names(query, fullnames, &names, tblsize);
|
|
|
|
return names;
|
|
}
|
|
|
|
char* qc_get_canonical(GWBUF* query)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
char *rval;
|
|
|
|
if (this_unit.classifier->qc_get_canonical)
|
|
{
|
|
this_unit.classifier->qc_get_canonical(query, &rval);
|
|
}
|
|
else
|
|
{
|
|
rval = modutil_get_canonical(query);
|
|
}
|
|
|
|
if (rval)
|
|
{
|
|
squeeze_whitespace(rval);
|
|
}
|
|
|
|
return rval;
|
|
}
|
|
|
|
bool qc_query_has_clause(GWBUF* query)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
int32_t has_clause = 0;
|
|
|
|
QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_query_has_clause(query, &has_clause);
|
|
|
|
return (has_clause != 0) ? true : false;
|
|
}
|
|
|
|
void qc_get_field_info(GWBUF* query, const QC_FIELD_INFO** infos, size_t* n_infos)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
*infos = NULL;
|
|
|
|
uint32_t n = 0;
|
|
|
|
QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_get_field_info(query, infos, &n);
|
|
|
|
*n_infos = n;
|
|
}
|
|
|
|
void qc_get_function_info(GWBUF* query, const QC_FUNCTION_INFO** infos, size_t* n_infos)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
*infos = NULL;
|
|
|
|
uint32_t n = 0;
|
|
|
|
QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_get_function_info(query, infos, &n);
|
|
|
|
*n_infos = n;
|
|
}
|
|
|
|
char** qc_get_database_names(GWBUF* query, int* sizep)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
char** names = NULL;
|
|
*sizep = 0;
|
|
|
|
QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_get_database_names(query, &names, sizep);
|
|
|
|
return names;
|
|
}
|
|
|
|
char* qc_get_prepare_name(GWBUF* query)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
char* name = NULL;
|
|
|
|
QCInfoCacheScope scope(query);
|
|
this_unit.classifier->qc_get_prepare_name(query, &name);
|
|
|
|
return name;
|
|
}
|
|
|
|
GWBUF* qc_get_preparable_stmt(GWBUF* stmt)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
GWBUF* preparable_stmt = NULL;
|
|
|
|
QCInfoCacheScope scope(stmt);
|
|
this_unit.classifier->qc_get_preparable_stmt(stmt, &preparable_stmt);
|
|
|
|
return preparable_stmt;
|
|
}
|
|
|
|
const char* qc_op_to_string(qc_query_op_t op)
|
|
{
|
|
switch (op)
|
|
{
|
|
case QUERY_OP_UNDEFINED:
|
|
return "QUERY_OP_UNDEFINED";
|
|
|
|
case QUERY_OP_ALTER:
|
|
return "QUERY_OP_ALTER";
|
|
|
|
case QUERY_OP_CALL:
|
|
return "QUERY_OP_CALL";
|
|
|
|
case QUERY_OP_CHANGE_DB:
|
|
return "QUERY_OP_CHANGE_DB";
|
|
|
|
case QUERY_OP_CREATE:
|
|
return "QUERY_OP_CREATE";
|
|
|
|
case QUERY_OP_DELETE:
|
|
return "QUERY_OP_DELETE";
|
|
|
|
case QUERY_OP_DROP:
|
|
return "QUERY_OP_DROP";
|
|
|
|
case QUERY_OP_EXPLAIN:
|
|
return "QUERY_OP_EXPLAIN";
|
|
|
|
case QUERY_OP_GRANT:
|
|
return "QUERY_OP_GRANT";
|
|
|
|
case QUERY_OP_INSERT:
|
|
return "QUERY_OP_INSERT";
|
|
|
|
case QUERY_OP_LOAD:
|
|
return "QUERY_OP_LOAD";
|
|
|
|
case QUERY_OP_LOAD_LOCAL:
|
|
return "QUERY_OP_LOAD_LOCAL";
|
|
|
|
case QUERY_OP_REVOKE:
|
|
return "QUERY_OP_REVOKE";
|
|
|
|
case QUERY_OP_SELECT:
|
|
return "QUERY_OP_SELECT";
|
|
|
|
case QUERY_OP_SHOW:
|
|
return "QUERY_OP_SHOW";
|
|
|
|
case QUERY_OP_TRUNCATE:
|
|
return "QUERY_OP_TRUNCATE";
|
|
|
|
case QUERY_OP_UPDATE:
|
|
return "QUERY_OP_UPDATE";
|
|
|
|
default:
|
|
return "UNKNOWN_QUERY_OP";
|
|
}
|
|
}
|
|
|
|
struct type_name_info type_to_type_name_info(qc_query_type_t type)
|
|
{
|
|
struct type_name_info info;
|
|
|
|
switch (type)
|
|
{
|
|
case QUERY_TYPE_UNKNOWN:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_UNKNOWN";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_LOCAL_READ:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_LOCAL_READ";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_READ:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_READ";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_WRITE:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_WRITE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_MASTER_READ:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_MASTER_READ";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_SESSION_WRITE:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_SESSION_WRITE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_USERVAR_WRITE:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_USERVAR_WRITE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_USERVAR_READ:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_USERVAR_READ";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_SYSVAR_READ:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_SYSVAR_READ";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
/** Not implemented yet */
|
|
//case QUERY_TYPE_SYSVAR_WRITE:
|
|
case QUERY_TYPE_GSYSVAR_READ:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_GSYSVAR_READ";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_GSYSVAR_WRITE:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_GSYSVAR_WRITE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_BEGIN_TRX:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_BEGIN_TRX";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_ENABLE_AUTOCOMMIT:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_ENABLE_AUTOCOMMIT";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_DISABLE_AUTOCOMMIT:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_DISABLE_AUTOCOMMIT";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_ROLLBACK:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_ROLLBACK";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_COMMIT:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_COMMIT";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_PREPARE_NAMED_STMT:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_PREPARE_NAMED_STMT";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_PREPARE_STMT:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_PREPARE_STMT";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_EXEC_STMT:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_EXEC_STMT";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_CREATE_TMP_TABLE:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_CREATE_TMP_TABLE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_READ_TMP_TABLE:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_READ_TMP_TABLE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_SHOW_DATABASES:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_SHOW_DATABASES";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_SHOW_TABLES:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_SHOW_TABLES";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
case QUERY_TYPE_DEALLOC_PREPARE:
|
|
{
|
|
static const char name[] = "QUERY_TYPE_DEALLOC_PREPARE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
{
|
|
static const char name[] = "UNKNOWN_QUERY_TYPE";
|
|
info.name = name;
|
|
info.name_len = sizeof(name) - 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return info;
|
|
}
|
|
|
|
|
|
const char* qc_type_to_string(qc_query_type_t type)
|
|
{
|
|
return type_to_type_name_info(type).name;
|
|
}
|
|
|
|
static const qc_query_type_t QUERY_TYPES[] =
|
|
{
|
|
/* Excluded by design */
|
|
//QUERY_TYPE_UNKNOWN,
|
|
QUERY_TYPE_LOCAL_READ,
|
|
QUERY_TYPE_READ,
|
|
QUERY_TYPE_WRITE,
|
|
QUERY_TYPE_MASTER_READ,
|
|
QUERY_TYPE_SESSION_WRITE,
|
|
QUERY_TYPE_USERVAR_WRITE,
|
|
QUERY_TYPE_USERVAR_READ,
|
|
QUERY_TYPE_SYSVAR_READ,
|
|
/** Not implemented yet */
|
|
//QUERY_TYPE_SYSVAR_WRITE,
|
|
QUERY_TYPE_GSYSVAR_READ,
|
|
QUERY_TYPE_GSYSVAR_WRITE,
|
|
QUERY_TYPE_BEGIN_TRX,
|
|
QUERY_TYPE_ENABLE_AUTOCOMMIT,
|
|
QUERY_TYPE_DISABLE_AUTOCOMMIT,
|
|
QUERY_TYPE_ROLLBACK,
|
|
QUERY_TYPE_COMMIT,
|
|
QUERY_TYPE_PREPARE_NAMED_STMT,
|
|
QUERY_TYPE_PREPARE_STMT,
|
|
QUERY_TYPE_EXEC_STMT,
|
|
QUERY_TYPE_CREATE_TMP_TABLE,
|
|
QUERY_TYPE_READ_TMP_TABLE,
|
|
QUERY_TYPE_SHOW_DATABASES,
|
|
QUERY_TYPE_SHOW_TABLES,
|
|
QUERY_TYPE_DEALLOC_PREPARE,
|
|
};
|
|
|
|
static const int N_QUERY_TYPES = sizeof(QUERY_TYPES) / sizeof(QUERY_TYPES[0]);
|
|
static const int QUERY_TYPE_MAX_LEN = 29; // strlen("QUERY_TYPE_PREPARE_NAMED_STMT");
|
|
|
|
char* qc_typemask_to_string(uint32_t types)
|
|
{
|
|
int len = 0;
|
|
|
|
// First calculate how much space will be needed.
|
|
for (int i = 0; i < N_QUERY_TYPES; ++i)
|
|
{
|
|
if (types & QUERY_TYPES[i])
|
|
{
|
|
if (len != 0)
|
|
{
|
|
++len; // strlen("|");
|
|
}
|
|
|
|
len += QUERY_TYPE_MAX_LEN;
|
|
}
|
|
}
|
|
|
|
++len;
|
|
|
|
// Then make one allocation and build the string.
|
|
char* s = (char*) MXS_MALLOC(len);
|
|
|
|
if (s)
|
|
{
|
|
if (len > 1)
|
|
{
|
|
char* p = s;
|
|
|
|
for (int i = 0; i < N_QUERY_TYPES; ++i)
|
|
{
|
|
qc_query_type_t type = QUERY_TYPES[i];
|
|
|
|
if (types & type)
|
|
{
|
|
if (p != s)
|
|
{
|
|
strcpy(p, "|");
|
|
++p;
|
|
}
|
|
|
|
struct type_name_info info = type_to_type_name_info(type);
|
|
|
|
strcpy(p, info.name);
|
|
p += info.name_len;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*s = 0;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static uint32_t qc_get_trx_type_mask_using_qc(GWBUF* stmt)
|
|
{
|
|
uint32_t type_mask = qc_get_type_mask(stmt);
|
|
|
|
if (qc_query_is_type(type_mask, QUERY_TYPE_WRITE) &&
|
|
qc_query_is_type(type_mask, QUERY_TYPE_COMMIT))
|
|
{
|
|
// This is a commit reported for "CREATE TABLE...",
|
|
// "DROP TABLE...", etc. that cause an implicit commit.
|
|
type_mask = 0;
|
|
}
|
|
else
|
|
{
|
|
// Only START TRANSACTION can be explicitly READ or WRITE.
|
|
if (!(type_mask & QUERY_TYPE_BEGIN_TRX))
|
|
{
|
|
// So, strip them away for everything else.
|
|
type_mask &= ~(QUERY_TYPE_WRITE | QUERY_TYPE_READ);
|
|
}
|
|
|
|
// Then leave only the bits related to transaction and
|
|
// autocommit state.
|
|
type_mask &= (QUERY_TYPE_BEGIN_TRX |
|
|
QUERY_TYPE_WRITE |
|
|
QUERY_TYPE_READ |
|
|
QUERY_TYPE_COMMIT |
|
|
QUERY_TYPE_ROLLBACK |
|
|
QUERY_TYPE_ENABLE_AUTOCOMMIT |
|
|
QUERY_TYPE_DISABLE_AUTOCOMMIT);
|
|
}
|
|
|
|
return type_mask;
|
|
}
|
|
|
|
static uint32_t qc_get_trx_type_mask_using_parser(GWBUF* stmt)
|
|
{
|
|
maxscale::TrxBoundaryParser parser;
|
|
|
|
return parser.type_mask_of(stmt);
|
|
}
|
|
|
|
uint32_t qc_get_trx_type_mask_using(GWBUF* stmt, qc_trx_parse_using_t use)
|
|
{
|
|
uint32_t type_mask = 0;
|
|
|
|
switch (use)
|
|
{
|
|
case QC_TRX_PARSE_USING_QC:
|
|
type_mask = qc_get_trx_type_mask_using_qc(stmt);
|
|
break;
|
|
|
|
case QC_TRX_PARSE_USING_PARSER:
|
|
type_mask = qc_get_trx_type_mask_using_parser(stmt);
|
|
break;
|
|
|
|
default:
|
|
ss_dassert(!true);
|
|
}
|
|
|
|
return type_mask;
|
|
}
|
|
|
|
uint32_t qc_get_trx_type_mask(GWBUF* stmt)
|
|
{
|
|
return qc_get_trx_type_mask_using(stmt, this_unit.qc_trx_parse_using);
|
|
}
|
|
|
|
void qc_set_server_version(uint64_t version)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
this_unit.classifier->qc_set_server_version(version);
|
|
}
|
|
|
|
uint64_t qc_get_server_version()
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
uint64_t version;
|
|
|
|
this_unit.classifier->qc_get_server_version(&version);
|
|
|
|
return version;
|
|
}
|
|
|
|
qc_sql_mode_t qc_get_sql_mode()
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
return this_unit.qc_sql_mode;
|
|
}
|
|
|
|
void qc_set_sql_mode(qc_sql_mode_t sql_mode)
|
|
{
|
|
QC_TRACE();
|
|
ss_dassert(this_unit.classifier);
|
|
|
|
int32_t rv = this_unit.classifier->qc_set_sql_mode(sql_mode);
|
|
ss_dassert(rv == QC_RESULT_OK);
|
|
|
|
if (rv == QC_RESULT_OK)
|
|
{
|
|
this_unit.qc_sql_mode = sql_mode;
|
|
}
|
|
}
|
|
|
|
bool qc_get_cache_stats(QC_CACHE_STATS* pStats)
|
|
{
|
|
QC_TRACE();
|
|
|
|
bool rv = false;
|
|
|
|
QCInfoCache* pInfo_cache = this_thread.pInfo_cache;
|
|
|
|
if (pInfo_cache && use_cached_result())
|
|
{
|
|
pInfo_cache->get_stats(pStats);
|
|
rv = true;
|
|
}
|
|
|
|
return rv;
|
|
}
|