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fdcc44c425
Add a configurable max_relations_in_where_clause parameter (default 100) to the CQL dialect, plumbed through db::config, transport server, and test environment. This will be used by the CQL parser to reject WHERE clauses with too many relations that cause quadratic complexity.
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
// Copyright (C) 2024-present ScyllaDB
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// SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.1
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#pragma once
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#include <fmt/core.h>
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namespace cql3 {
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struct dialect {
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bool duplicate_bind_variable_names_refer_to_same_variable = true; // if :a is found twice in a query, the two references are to the same variable (see #15559)
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unsigned max_relations_in_where_clause = 100; // maximum number of relations in a WHERE clause
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bool operator==(const dialect&) const = default;
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};
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inline
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dialect
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internal_dialect() {
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return dialect{
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.duplicate_bind_variable_names_refer_to_same_variable = true,
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.max_relations_in_where_clause = 100,
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};
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}
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}
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template <>
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struct fmt::formatter<cql3::dialect> {
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constexpr auto parse(format_parse_context& ctx) { return ctx.begin(); }
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template <typename FormatContext>
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auto format(const cql3::dialect& d, FormatContext& ctx) const {
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return fmt::format_to(ctx.out(), "cql3::dialect{{duplicate_bind_variable_names_refer_to_same_variable={}, max_relations_in_where_clause={}}}",
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d.duplicate_bind_variable_names_refer_to_same_variable, d.max_relations_in_where_clause);
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}
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};
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