pgbench.h

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/*-------------------------------------------------------------------------
 *
 * pgbench.h
 *
 * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 *-------------------------------------------------------------------------
 */
 
#ifndef PGBENCH_H
#define PGBENCH_H
 
#include "fe_utils/psqlscan.h"
 
/*
 * This file is included outside exprscan.l, in places where we can't see
 * flex's definition of typedef yyscan_t.  Fortunately, it's documented as
 * being "void *", so we can use a macro to keep the function declarations
 * here looking like the definitions in exprscan.l.  exprparse.y and
 * pgbench.c also use this to be able to declare things as "yyscan_t".
 */
#define yyscan_t  void *
 
/*
 * Likewise, we can't see exprparse.y's definition of union YYSTYPE here,
 * but for now there's no need to know what the union contents are.
 */
union YYSTYPE;
 
/*
 * Variable types used in parser.
 */
typedef enum
{
    PGBT_NO_VALUE,
    PGBT_NULL,
    PGBT_INT,
    PGBT_DOUBLE,
    PGBT_BOOLEAN
    /* add other types here */
} PgBenchValueType;
 
typedef struct
{
    PgBenchValueType type;
    union
    {
        int64       ival;
        double      dval;
        bool        bval;
        /* add other types here */
    }           u;
} PgBenchValue;
 
/* Types of expression nodes */
typedef enum PgBenchExprType
{
    ENODE_CONSTANT,
    ENODE_VARIABLE,
    ENODE_FUNCTION
} PgBenchExprType;
 
/* List of operators and callable functions */
typedef enum PgBenchFunction
{
    PGBENCH_ADD,
    PGBENCH_SUB,
    PGBENCH_MUL,
    PGBENCH_DIV,
    PGBENCH_MOD,
    PGBENCH_DEBUG,
    PGBENCH_ABS,
    PGBENCH_LEAST,
    PGBENCH_GREATEST,
    PGBENCH_INT,
    PGBENCH_DOUBLE,
    PGBENCH_PI,
    PGBENCH_SQRT,
    PGBENCH_LN,
    PGBENCH_EXP,
    PGBENCH_RANDOM,
    PGBENCH_RANDOM_GAUSSIAN,
    PGBENCH_RANDOM_EXPONENTIAL,
    PGBENCH_RANDOM_ZIPFIAN,
    PGBENCH_POW,
    PGBENCH_AND,
    PGBENCH_OR,
    PGBENCH_NOT,
    PGBENCH_BITAND,
    PGBENCH_BITOR,
    PGBENCH_BITXOR,
    PGBENCH_LSHIFT,
    PGBENCH_RSHIFT,
    PGBENCH_EQ,
    PGBENCH_NE,
    PGBENCH_LE,
    PGBENCH_LT,
    PGBENCH_IS,
    PGBENCH_CASE,
    PGBENCH_HASH_FNV1A,
    PGBENCH_HASH_MURMUR2,
    PGBENCH_PERMUTE
} PgBenchFunction;
 
typedef struct PgBenchExpr PgBenchExpr;
typedef struct PgBenchExprLink PgBenchExprLink;
typedef struct PgBenchExprList PgBenchExprList;
 
struct PgBenchExpr
{
    PgBenchExprType etype;
    union
    {
        PgBenchValue constant;
        struct
        {
            char       *varname;
        }           variable;
        struct
        {
            PgBenchFunction function;
            PgBenchExprLink *args;
        }           function;
    }           u;
};
 
/* List of expression nodes */
struct PgBenchExprLink
{
    PgBenchExpr *expr;
    PgBenchExprLink *next;
};
 
struct PgBenchExprList
{
    PgBenchExprLink *head;
    PgBenchExprLink *tail;
};
 
extern PgBenchExpr *expr_parse_result;
 
extern int  expr_yyparse(yyscan_t yyscanner);
extern int  expr_yylex(union YYSTYPE *yylval_param, yyscan_t yyscanner);
extern void expr_yyerror(yyscan_t yyscanner, const char *message) pg_attribute_noreturn();
extern void expr_yyerror_more(yyscan_t yyscanner, const char *message,
                              const char *more) pg_attribute_noreturn();
extern bool expr_lex_one_word(PsqlScanState state, PQExpBuffer word_buf,
                              int *offset);
extern yyscan_t expr_scanner_init(PsqlScanState state,
                                  const char *source, int lineno, int start_offset,
                                  const char *command);
extern void expr_scanner_finish(yyscan_t yyscanner);
extern int  expr_scanner_offset(PsqlScanState state);
extern char *expr_scanner_get_substring(PsqlScanState state,
                                        int start_offset, int end_offset,
                                        bool chomp);
extern int  expr_scanner_get_lineno(PsqlScanState state, int offset);
 
extern void syntax_error(const char *source, int lineno, const char *line,
                         const char *command, const char *msg,
                         const char *more, int column) pg_attribute_noreturn();
 
extern bool strtoint64(const char *str, bool errorOK, int64 *result);
extern bool strtodouble(const char *str, bool errorOK, double *dv);
 
#endif                          /* PGBENCH_H */