#pragma once #include #include #include namespace DB { class IAST; using ASTPtr = std::shared_ptr; class ExpressionActions; using ExpressionActionsPtr = std::shared_ptr; class Set; using SetPtr = std::shared_ptr; /// Information about calculated sets in right hand side of IN. using PreparedSets = std::unordered_map; struct PrewhereInfo { /// Actions which are executed on block in order to get filter column for prewhere step. ExpressionActionsPtr prewhere_actions; String prewhere_column_name; bool remove_prewhere_column = false; PrewhereInfo() = default; explicit PrewhereInfo(ExpressionActionsPtr prewhere_actions_, String prewhere_column_name_) : prewhere_actions(std::move(prewhere_actions_)), prewhere_column_name(std::move(prewhere_column_name_)) {} }; using PrewhereInfoPtr = std::shared_ptr; /** Query along with some additional data, * that can be used during query processing * inside storage engines. */ struct SelectQueryInfo { ASTPtr query; PrewhereInfoPtr prewhere_info; /// Prepared sets are used for indices by storage engine. /// Example: x IN (1, 2, 3) PreparedSets sets; }; }