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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 */
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