stat_utils.h

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/*-------------------------------------------------------------------------
 *
 * stat_utils.h
 *    Extended statistics and selectivity estimation functions.
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/statistics/stat_utils.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef STATS_UTILS_H
#define STATS_UTILS_H
 
#include "fmgr.h"
 
/* avoid including primnodes.h here */
typedef struct RangeVar RangeVar;
 
struct StatsArgInfo
{
    const char *argname;
    Oid         argtype;
};
 
extern void stats_check_required_arg(FunctionCallInfo fcinfo,
                                     struct StatsArgInfo *arginfo,
                                     int argnum);
extern bool stats_check_arg_array(FunctionCallInfo fcinfo,
                                  struct StatsArgInfo *arginfo, int argnum);
extern bool stats_check_arg_pair(FunctionCallInfo fcinfo,
                                 struct StatsArgInfo *arginfo,
                                 int argnum1, int argnum2);
 
extern void RangeVarCallbackForStats(const RangeVar *relation,
                                     Oid relId, Oid oldRelid, void *arg);
 
extern bool stats_fill_fcinfo_from_arg_pairs(FunctionCallInfo pairs_fcinfo,
                                             FunctionCallInfo positional_fcinfo,
                                             struct StatsArgInfo *arginfo);
 
#endif                          /* STATS_UTILS_H */