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495c6e03aa
* Replace all Context references with std::weak_ptr * Fix shared context captured by value * Fix build * Fix Context with named sessions * Fix copy context * Fix gcc build * Merge with master and fix build * Fix gcc-9 build
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
#include <Storages/ConstraintsDescription.h>
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#include <Interpreters/ExpressionAnalyzer.h>
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#include <Interpreters/TreeRewriter.h>
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#include <Parsers/formatAST.h>
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#include <Parsers/ParserCreateQuery.h>
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#include <Parsers/parseQuery.h>
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#include <Parsers/ASTExpressionList.h>
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#include <Core/Defines.h>
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namespace DB
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{
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String ConstraintsDescription::toString() const
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{
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if (constraints.empty())
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return {};
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ASTExpressionList list;
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for (const auto & constraint : constraints)
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list.children.push_back(constraint);
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return serializeAST(list, true);
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}
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ConstraintsDescription ConstraintsDescription::parse(const String & str)
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{
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if (str.empty())
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return {};
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ConstraintsDescription res;
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ParserConstraintDeclarationList parser;
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ASTPtr list = parseQuery(parser, str, 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
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for (const auto & constraint : list->children)
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res.constraints.push_back(constraint);
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return res;
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}
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ConstraintsExpressions ConstraintsDescription::getExpressions(const DB::ContextPtr context,
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const DB::NamesAndTypesList & source_columns_) const
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{
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ConstraintsExpressions res;
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res.reserve(constraints.size());
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for (const auto & constraint : constraints)
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{
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// TreeRewriter::analyze has query as non-const argument so to avoid accidental query changes we clone it
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auto * constraint_ptr = constraint->as<ASTConstraintDeclaration>();
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ASTPtr expr = constraint_ptr->expr->clone();
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auto syntax_result = TreeRewriter(context).analyze(expr, source_columns_);
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res.push_back(ExpressionAnalyzer(constraint_ptr->expr->clone(), syntax_result, context).getActions(false));
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}
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return res;
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}
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ConstraintsDescription::ConstraintsDescription(const ConstraintsDescription & other)
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{
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constraints.reserve(other.constraints.size());
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for (const auto & constraint : other.constraints)
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constraints.emplace_back(constraint->clone());
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}
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ConstraintsDescription & ConstraintsDescription::operator=(const ConstraintsDescription & other)
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{
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constraints.resize(other.constraints.size());
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for (size_t i = 0; i < constraints.size(); ++i)
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constraints[i] = other.constraints[i]->clone();
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return *this;
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}
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}
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