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37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
#pragma once
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#include <Parsers/IAST.h>
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#include <Parsers/ASTSelectQuery.h>
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#include <Parsers/ASTSelectWithUnionQuery.h>
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#include <Interpreters/InDepthNodeVisitor.h>
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namespace DB
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{
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class PredicateRewriteVisitorData
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{
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public:
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bool is_rewrite = false;
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using TypeToVisit = ASTSelectWithUnionQuery;
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void visit(ASTSelectWithUnionQuery & union_select_query, ASTPtr &);
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PredicateRewriteVisitorData(const Context & context_, const ASTs & predicates_, const Names & column_names_, bool optimize_final_);
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private:
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const Context & context;
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const ASTs & predicates;
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const Names & column_names;
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bool optimize_final;
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void visitFirstInternalSelect(ASTSelectQuery & select_query, ASTPtr &);
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void visitOtherInternalSelect(ASTSelectQuery & select_query, ASTPtr &);
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bool rewriteSubquery(ASTSelectQuery & subquery, const Names & outer_columns, const Names & inner_columns);
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};
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using PredicateRewriteMatcher = OneTypeMatcher<PredicateRewriteVisitorData, false>;
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using PredicateRewriteVisitor = InDepthNodeVisitor<PredicateRewriteMatcher, true>;
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}
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