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#pragma once
#include <Analyzer/IQueryTreePass.h>
namespace DB
{
/** Rewrite possible 'arrayExists(func, arr)' to 'has(arr, elem)' to improve performance.
*
* Example: SELECT arrayExists(x -> x = 1, arr);
* Result: SELECT has(arr, 1);
*
* Example: SELECT arrayExists(x -> 1 = x, arr);
* Result: SELECT has(arr, 1);
*/
class RewriteArrayExistsToHasPass final : public IQueryTreePass
{
public:
String getName() override { return "RewriteArrayExistsToHas"; }
String getDescription() override { return "Rewrite arrayExists(func, arr) functions to has(arr, elem) when logically equivalent"; }
void run(QueryTreeNodePtr query_tree_node, ContextPtr context) override;
};
}
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