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#include "AutoFinalOnQueryPass.h"
#include <Storages/IStorage.h>
#include <Analyzer/Utils.h>
#include <Analyzer/TableNode.h>
#include <Analyzer/TableFunctionNode.h>
#include <Analyzer/TableExpressionModifiers.h>
#include <Analyzer/InDepthQueryTreeVisitor.h>
namespace DB
{
namespace
{
class AutoFinalOnQueryPassVisitor : public InDepthQueryTreeVisitorWithContext<AutoFinalOnQueryPassVisitor>
{
public:
using Base = InDepthQueryTreeVisitorWithContext<AutoFinalOnQueryPassVisitor>;
using Base::Base;
void enterImpl(QueryTreeNodePtr & node)
{
if (!getSettings().final)
return;
const auto * query_node = node->as<QueryNode>();
if (!query_node)
return;
auto table_expressions = extractTableExpressions(query_node->getJoinTree());
for (auto & table_expression : table_expressions)
applyFinalIfNeeded(table_expression);
}
private:
static void applyFinalIfNeeded(QueryTreeNodePtr & node)
{
auto * table_node = node->as<TableNode>();
auto * table_function_node = node->as<TableFunctionNode>();
if (!table_node && !table_function_node)
return;
const auto & storage = table_node ? table_node->getStorage() : table_function_node->getStorage();
bool is_final_supported = storage && storage->supportsFinal();
if (!is_final_supported)
return;
TableExpressionModifiers table_expression_modifiers_with_final(true /*has_final*/, {}, {});
if (table_node)
{
if (table_node->hasTableExpressionModifiers())
table_node->getTableExpressionModifiers()->setHasFinal(true);
else
table_node->setTableExpressionModifiers(table_expression_modifiers_with_final);
}
else if (table_function_node)
{
if (table_function_node->hasTableExpressionModifiers())
table_function_node->getTableExpressionModifiers()->setHasFinal(true);
else
table_function_node->setTableExpressionModifiers(table_expression_modifiers_with_final);
}
}
};
}
void AutoFinalOnQueryPass::run(QueryTreeNodePtr query_tree_node, ContextPtr context)
{
auto visitor = AutoFinalOnQueryPassVisitor(std::move(context));
visitor.visit(query_tree_node);
}
}
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