mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 05:32:52 +00:00
30 lines
692 B
C++
30 lines
692 B
C++
#pragma once
|
|
|
|
#include <unordered_set>
|
|
|
|
#include <Parsers/IAST.h>
|
|
#include <Interpreters/InDepthNodeVisitor.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
class ASTFunction;
|
|
|
|
/// Rewrite 'any' and 'anyLast' functions pushing them inside original function.
|
|
/// any(f(x, y, g(z))) -> f(any(x), any(y), g(any(z)))
|
|
class RewriteAnyFunctionMatcher
|
|
{
|
|
public:
|
|
struct Data
|
|
{
|
|
std::unordered_set<IAST *> rewritten;
|
|
};
|
|
|
|
static void visit(ASTPtr & ast, Data & data);
|
|
static void visit(const ASTFunction &, ASTPtr & ast, Data & data);
|
|
static bool needChildVisit(const ASTPtr & node, const ASTPtr & child);
|
|
};
|
|
using RewriteAnyFunctionVisitor = InDepthNodeVisitor<RewriteAnyFunctionMatcher, false>;
|
|
|
|
}
|