mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 21:42:39 +00:00
2b21b83979
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
90 lines
3.8 KiB
C++
90 lines
3.8 KiB
C++
#pragma once
|
|
|
|
#include <Core/Names.h>
|
|
#include <Core/NamesAndTypes.h>
|
|
|
|
#include <Interpreters/Context_fwd.h>
|
|
|
|
#include <Analyzer/IQueryTreeNode.h>
|
|
|
|
#include <Interpreters/ActionsDAG.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
class PlannerContext;
|
|
using PlannerContextPtr = std::shared_ptr<PlannerContext>;
|
|
|
|
/** Planner actions visitor is responsible for adding necessary actions to calculate query tree expression node
|
|
* into actions dag.
|
|
*
|
|
* Preconditions:
|
|
* 1. Table expression data for table expression nodes is collected in planner context.
|
|
* For column node, that has column table expression source, identifier for column name in table expression data
|
|
* is used as action dag node name, if use_column_identifier_as_action_node_name = true.
|
|
* 2. Sets for IN functions are already collected in planner context.
|
|
*
|
|
* During actions build, there is special handling for following functions:
|
|
* 1. Aggregate functions are added in actions dag as INPUT nodes. Aggregate functions arguments are not added.
|
|
* 2. For function `in` and its variants, already collected sets from planner context are used.
|
|
*/
|
|
class PlannerActionsVisitor
|
|
{
|
|
public:
|
|
explicit PlannerActionsVisitor(const PlannerContextPtr & planner_context_, bool use_column_identifier_as_action_node_name_ = true);
|
|
|
|
/** Add actions necessary to calculate expression node into expression dag.
|
|
* Necessary actions are not added in actions dag output.
|
|
* Returns query tree expression node actions dag nodes.
|
|
*/
|
|
ActionsDAG::NodeRawConstPtrs visit(ActionsDAGPtr actions_dag, QueryTreeNodePtr expression_node);
|
|
|
|
private:
|
|
const PlannerContextPtr planner_context;
|
|
bool use_column_identifier_as_action_node_name = true;
|
|
};
|
|
|
|
/** Calculate query tree expression node action dag name and add them into node to name map.
|
|
* If node exists in map, name from map is used.
|
|
*
|
|
* For column node column node identifier from planner context is used, if use_column_identifier_as_action_node_name = true.
|
|
*/
|
|
using QueryTreeNodeToName = std::unordered_map<QueryTreeNodePtr, String>;
|
|
String calculateActionNodeName(const QueryTreeNodePtr & node,
|
|
const PlannerContext & planner_context,
|
|
QueryTreeNodeToName & node_to_name,
|
|
bool use_column_identifier_as_action_node_name = true);
|
|
|
|
/** Calculate query tree expression node action dag name.
|
|
*
|
|
* For column node column node identifier from planner context is used, if use_column_identifier_as_action_node_name = true.
|
|
*/
|
|
String calculateActionNodeName(const QueryTreeNodePtr & node,
|
|
const PlannerContext & planner_context,
|
|
bool use_column_identifier_as_action_node_name = true);
|
|
|
|
/// Calculate action node name for constant
|
|
String calculateConstantActionNodeName(const Field & constant_literal, const DataTypePtr & constant_type);
|
|
|
|
/// Calculate action node name for constant, data type will be derived from constant literal value
|
|
String calculateConstantActionNodeName(const Field & constant_literal);
|
|
|
|
/** Calculate action node name for window node.
|
|
* Window node action name can only be part of window function action name.
|
|
* For column node column node identifier from planner context is used, if use_column_identifier_as_action_node_name = true.
|
|
*/
|
|
String calculateWindowNodeActionName(const QueryTreeNodePtr & node,
|
|
const PlannerContext & planner_context,
|
|
QueryTreeNodeToName & node_to_name,
|
|
bool use_column_identifier_as_action_node_name = true);
|
|
|
|
/** Calculate action node name for window node.
|
|
* Window node action name can only be part of window function action name.
|
|
* For column node column node identifier from planner context is used, if use_column_identifier_as_action_node_name = true.
|
|
*/
|
|
String calculateWindowNodeActionName(const QueryTreeNodePtr & node,
|
|
const PlannerContext & planner_context,
|
|
bool use_column_identifier_as_action_node_name = true);
|
|
|
|
}
|