greenplumn clauses 源码
greenplumn clauses 代码
文件路径：/src/include/optimizer/clauses.h
/*-------------------------------------------------------------------------
*
* clauses.h
* prototypes for clauses.c.
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/optimizer/clauses.h
*
*-------------------------------------------------------------------------
*/
#ifndef CLAUSES_H
#define CLAUSES_H
#include "access/htup.h"
#include "nodes/pathnodes.h"
#include "optimizer/walkers.h"
// max size of a folded constant when optimizing queries in Orca
// Note: this is to prevent OOM issues when trying to serialize very large constants
// Current limit: 100KB
#define GPOPT_MAX_FOLDED_CONSTANT_SIZE (100*1024)
typedef struct
{
bool hasOrderedAggs; /* any ordered aggs? */
int numWindowFuncs; /* total number of WindowFuncs found */
Index maxWinRef; /* windowFuncs[] is indexed 0 .. maxWinRef */
List **windowFuncs; /* lists of WindowFuncs for each winref */
} WindowFuncLists;
extern bool contain_agg_clause(Node *clause);
extern void get_agg_clause_costs(PlannerInfo *root, Node *clause,
AggSplit aggsplit, AggClauseCosts *costs);
extern bool contain_window_function(Node *clause);
extern WindowFuncLists *find_window_functions(Node *clause, Index maxWinRef);
extern double expression_returns_set_rows(PlannerInfo *root, Node *clause);
extern bool contain_subplans(Node *clause);
extern char max_parallel_hazard(Query *parse);
extern bool is_parallel_safe(PlannerInfo *root, Node *node);
extern bool contain_nonstrict_functions(Node *clause);
extern bool contain_leaked_vars(Node *clause);
extern Relids find_nonnullable_rels(Node *clause);
extern List *find_nonnullable_vars(Node *clause);
extern List *find_forced_null_vars(Node *clause);
extern Var *find_forced_null_var(Node *clause);
extern char check_execute_on_functions(Node *clause);
extern bool is_pseudo_constant_clause(Node *clause);
extern bool is_pseudo_constant_clause_relids(Node *clause, Relids relids);
extern int NumRelids(Node *clause);
extern void CommuteOpExpr(OpExpr *clause);
extern Query *fold_constants(PlannerInfo *root, Query *q, ParamListInfo boundParams, Size max_size);
extern Expr *transform_array_Const_to_ArrayExpr(Const *c);
extern Query *inline_set_returning_function(PlannerInfo *root,
RangeTblEntry *rte);
extern Expr *evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
Oid result_collation);
extern bool is_builtin_true_equality_between_same_type(int opno);
extern bool subexpression_match(Expr *expr1, Expr *expr2);
// resolve the join alias varno/varattno information to its base varno/varattno information
extern Query *flatten_join_alias_var_optimizer(Query *query, int queryLevel);
#endif /* CLAUSES_H */
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