f344bd0aaa
Detect whether a statement is a count(*) query in prepare time. If so, instantiate a new `select_statement` subclass - `parallelized_select_statement`. This subclass has a different execution logic, that enables it to distribute count(*) queries across a cluster. Also, a new counter was added - `select_parallelized` that counts the number of parallelized aggregation SELECT query executions.
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
/*
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* Copyright (C) 2015-present ScyllaDB
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*
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* Modified by ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include "cql3/statements/statement_type.hh"
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namespace cql3 {
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/** Enums for selecting counters in `cql_stats', like:
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* stats.query_cnt(source_selector::USER, ks_selector::NONSYSTEM, cond_selector::NO_CONDITIONS, statement_type::INSERT)
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*/
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enum class source_selector : size_t {
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INTERNAL = 0u,
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USER,
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SIZE // Keep me as the last entry
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};
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enum class ks_selector : size_t {
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SYSTEM = 0u,
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NONSYSTEM,
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SIZE // Keep me as the last entry
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};
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enum class cond_selector : size_t {
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NO_CONDITIONS = 0u,
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WITH_CONDITIONS,
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SIZE // Keep me as the last entry
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};
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// Shard-local CQL statistics
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// @sa cql3/query_processor.cc explains the meaning of each counter
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struct cql_stats {
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uint64_t& query_cnt(source_selector ss, ks_selector kss, cond_selector cs, statements::statement_type st) {
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return _query_cnt[(size_t)ss][(size_t)kss][(size_t)cs][(size_t)st];
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}
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const uint64_t& query_cnt(source_selector ss, ks_selector kss, cond_selector cs, statements::statement_type st) const {
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return _query_cnt[(size_t)ss][(size_t)kss][(size_t)cs][(size_t)st];
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}
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uint64_t& unpaged_select_queries(ks_selector kss) {
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return _unpaged_select_queries[(size_t)kss];
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}
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const uint64_t& unpaged_select_queries(ks_selector kss) const {
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return _unpaged_select_queries[(size_t)kss];
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}
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uint64_t batches = 0;
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uint64_t cas_batches = 0;
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uint64_t statements_in_batches = 0;
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uint64_t statements_in_cas_batches = 0;
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uint64_t batches_pure_logged = 0;
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uint64_t batches_pure_unlogged = 0;
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uint64_t batches_unlogged_from_logged = 0;
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uint64_t rows_read = 0;
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uint64_t reverse_queries = 0;
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int64_t secondary_index_creates = 0;
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int64_t secondary_index_drops = 0;
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int64_t secondary_index_reads = 0;
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int64_t secondary_index_rows_read = 0;
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int64_t filtered_reads = 0;
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int64_t filtered_rows_matched_total = 0;
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int64_t filtered_rows_read_total = 0;
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int64_t select_bypass_caches = 0;
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int64_t select_allow_filtering = 0;
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int64_t select_partition_range_scan = 0;
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int64_t select_partition_range_scan_no_bypass_cache = 0;
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int64_t select_parallelized = 0;
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private:
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uint64_t _unpaged_select_queries[(size_t)ks_selector::SIZE] = {0ul};
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uint64_t _query_cnt[(size_t)source_selector::SIZE]
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[(size_t)ks_selector::SIZE]
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[(size_t)cond_selector::SIZE]
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[statements::statement_type::MAX_VALUE + 1] = {0ul};
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};
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}
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