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#include <vector>
#include "query_optimizer/expressions/Expression.hpp"
#include "query_optimizer/expressions/NamedExpression.hpp"
#include "query_optimizer/expressions/Predicate.hpp"
namespace quickstep {
namespace optimizer {
/** \addtogroup OptimizerRules
* @{
* @brief Returns the operand predicates if \p predicate is a conjunction,
* otherwise returns \p predicate itself.
* @param predicate The input predicate.
* @return The operand predicates if \p predicate is a conjunction;
* otherwise returns \p predicate itself.
std::vector<expressions::PredicatePtr> GetConjunctivePredicates(
const expressions::PredicatePtr &predicate);
* @brief Updates the expressions in \p non_project_expression_lists
* and \p project_expression_list by replacing the attribute
* references to the Aliases in \p project_expressions_for_pullup
* with the child expressions (i.e. the referent) of the Aliases.
* For project expressions, the expression IDs remain unchanged.
* For example, assume a project expression 'attr1+attr2' in
* project_expression_lists and assume that 'attr1' is defined in
* project_expressions_for_pullup as '1+1'.
* The new project expression after the 'pulling up'
* \p project_expressions_for_pullup is '1+1+attr2'.
* This is used when we want to merge two projects
* or pull up selections.
* @param project_expressions_for_pullup The project expressions to to be pulled up.
* @param non_project_expression_lists Non-project expressions to be updated. Any reference
* to an Alias in project_expressions_for_pullup is to
* be replaced with the child expression of the Alias.
* @param project_expression_lists Project expressions to be updated. The expression IDs are not changed.
void PullUpProjectExpressions(
const std::vector<expressions::NamedExpressionPtr> &project_expressions_for_pullup,
const std::vector<std::vector<expressions::ExpressionPtr>*> &non_project_expression_lists,
const std::vector<std::vector<expressions::NamedExpressionPtr>*> &project_expression_lists);
/** @} */
} // namespace optimizer
} // namespace quickstep