granicus.if.org Git - postgresql/blob - src/backend/parser/keywords.c

   1 /*-------------------------------------------------------------------------
   2  *
   3  * keywords.c
   4  *        lexical token lookup for reserved words in postgres SQL
   5  *
   6  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  *
  10  * IDENTIFICATION
  11  *        $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.66 2000/02/15 03:26:38 thomas Exp $
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15 #include <ctype.h>
  16
  17 #include "postgres.h"
  18 #include "nodes/parsenodes.h"
  19 #include "nodes/pg_list.h"
  20 #include "parse.h"
  21 #include "parser/keywords.h"
  22
  23 /*
  24  * List of (keyword-name, keyword-token-value) pairs.
  25  *
  26  * !!WARNING!!: This list must be sorted, because binary
  27  *               search is used to locate entries.
  28  */
  29 static ScanKeyword ScanKeywords[] = {
  30         /* name, value */
  31         {"abort", ABORT_TRANS},
  32         {"absolute", ABSOLUTE},
  33         {"access", ACCESS},
  34         {"action", ACTION},
  35         {"add", ADD},
  36         {"after", AFTER},
  37         {"aggregate", AGGREGATE},
  38         {"all", ALL},
  39         {"alter", ALTER},
  40         {"analyze", ANALYZE},
  41         {"and", AND},
  42         {"any", ANY},
  43         {"as", AS},
  44         {"asc", ASC},
  45         {"backward", BACKWARD},
  46         {"before", BEFORE},
  47         {"begin", BEGIN_TRANS},
  48         {"between", BETWEEN},
  49         {"binary", BINARY},
  50         {"both", BOTH},
  51         {"by", BY},
  52         {"cache", CACHE},
  53         {"cascade", CASCADE},
  54         {"case", CASE},
  55         {"cast", CAST},
  56         {"char", CHAR},
  57         {"character", CHARACTER},
  58         {"check", CHECK},
  59         {"close", CLOSE},
  60         {"cluster", CLUSTER},
  61         {"coalesce", COALESCE},
  62         {"collate", COLLATE},
  63         {"column", COLUMN},
  64         {"comment", COMMENT},
  65         {"commit", COMMIT},
  66         {"committed", COMMITTED},
  67         {"constraint", CONSTRAINT},
  68         {"constraints", CONSTRAINTS},
  69         {"copy", COPY},
  70         {"create", CREATE},
  71         {"createdb", CREATEDB},
  72         {"createuser", CREATEUSER},
  73         {"cross", CROSS},
  74         {"current_date", CURRENT_DATE},
  75         {"current_time", CURRENT_TIME},
  76         {"current_timestamp", CURRENT_TIMESTAMP},
  77         {"current_user", CURRENT_USER},
  78         {"cursor", CURSOR},
  79         {"cycle", CYCLE},
  80         {"database", DATABASE},
  81         {"day", DAY_P},
  82         {"dec", DEC},
  83         {"decimal", DECIMAL},
  84         {"declare", DECLARE},
  85         {"default", DEFAULT},
  86         {"deferrable", DEFERRABLE},
  87         {"deferred", DEFERRED},
  88         {"delete", DELETE},
  89         {"delimiters", DELIMITERS},
  90         {"desc", DESC},
  91         {"distinct", DISTINCT},
  92         {"do", DO},
  93         {"double", DOUBLE},
  94         {"drop", DROP},
  95         {"each", EACH},
  96         {"else", ELSE},
  97         {"encoding", ENCODING},
  98         {"end", END_TRANS},
  99         {"except", EXCEPT},
 100         {"exclusive", EXCLUSIVE},
 101         {"execute", EXECUTE},
 102         {"exists", EXISTS},
 103         {"explain", EXPLAIN},
 104         {"extend", EXTEND},
 105         {"extract", EXTRACT},
 106         {"false", FALSE_P},
 107         {"fetch", FETCH},
 108         {"float", FLOAT},
 109         {"for", FOR},
 110         {"foreign", FOREIGN},
 111         {"forward", FORWARD},
 112         {"from", FROM},
 113         {"full", FULL},
 114         {"function", FUNCTION},
 115         {"global", GLOBAL},
 116         {"grant", GRANT},
 117         {"group", GROUP},
 118         {"handler", HANDLER},
 119         {"having", HAVING},
 120         {"hour", HOUR_P},
 121         {"immediate", IMMEDIATE},
 122         {"in", IN},
 123         {"increment", INCREMENT},
 124         {"index", INDEX},
 125         {"inherits", INHERITS},
 126         {"initially", INITIALLY},
 127         {"inner", INNER_P},
 128         {"insensitive", INSENSITIVE},
 129         {"insert", INSERT},
 130         {"instead", INSTEAD},
 131         {"intersect", INTERSECT},
 132         {"interval", INTERVAL},
 133         {"into", INTO},
 134         {"is", IS},
 135         {"isnull", ISNULL},
 136         {"isolation", ISOLATION},
 137         {"join", JOIN},
 138         {"key", KEY},
 139         {"lancompiler", LANCOMPILER},
 140         {"language", LANGUAGE},
 141         {"leading", LEADING},
 142         {"left", LEFT},
 143         {"level", LEVEL},
 144         {"like", LIKE},
 145         {"limit", LIMIT},
 146         {"listen", LISTEN},
 147         {"load", LOAD},
 148         {"local", LOCAL},
 149         {"location", LOCATION},
 150         {"lock", LOCK_P},
 151         {"match", MATCH},
 152         {"maxvalue", MAXVALUE},
 153         {"minute", MINUTE_P},
 154         {"minvalue", MINVALUE},
 155         {"mode", MODE},
 156         {"month", MONTH_P},
 157         {"move", MOVE},
 158         {"names", NAMES},
 159         {"national", NATIONAL},
 160         {"natural", NATURAL},
 161         {"nchar", NCHAR},
 162         {"new", NEW},
 163         {"next", NEXT},
 164         {"no", NO},
 165         {"nocreatedb", NOCREATEDB},
 166         {"nocreateuser", NOCREATEUSER},
 167         {"none", NONE},
 168         {"not", NOT},
 169         {"nothing", NOTHING},
 170         {"notify", NOTIFY},
 171         {"notnull", NOTNULL},
 172         {"null", NULL_P},
 173         {"nullif", NULLIF},
 174         {"numeric", NUMERIC},
 175         {"of", OF},
 176         {"offset", OFFSET},
 177         {"oids", OIDS},
 178         {"old", CURRENT},
 179         {"on", ON},
 180         {"only", ONLY},
 181         {"operator", OPERATOR},
 182         {"option", OPTION},
 183         {"or", OR},
 184         {"order", ORDER},
 185         {"outer", OUTER_P},
 186         {"partial", PARTIAL},
 187         {"password", PASSWORD},
 188         {"pendant", PENDANT},
 189         {"position", POSITION},
 190         {"precision", PRECISION},
 191         {"primary", PRIMARY},
 192         {"prior", PRIOR},
 193         {"privileges", PRIVILEGES},
 194         {"procedural", PROCEDURAL},
 195         {"procedure", PROCEDURE},
 196         {"public", PUBLIC},
 197         {"read", READ},
 198         {"references", REFERENCES},
 199         {"relative", RELATIVE},
 200         {"rename", RENAME},
 201         {"reset", RESET},
 202         {"restrict", RESTRICT},
 203         {"returns", RETURNS},
 204         {"revoke", REVOKE},
 205         {"right", RIGHT},
 206         {"rollback", ROLLBACK},
 207         {"row", ROW},
 208         {"rule", RULE},
 209         {"scroll", SCROLL},
 210         {"second", SECOND_P},
 211         {"select", SELECT},
 212         {"sequence", SEQUENCE},
 213         {"serial", SERIAL},
 214         {"serializable", SERIALIZABLE},
 215         {"session_user", SESSION_USER},
 216         {"set", SET},
 217         {"setof", SETOF},
 218         {"share", SHARE},
 219         {"show", SHOW},
 220         {"start", START},
 221         {"statement", STATEMENT},
 222         {"stdin", STDIN},
 223         {"stdout", STDOUT},
 224         {"substring", SUBSTRING},
 225     {"sysid", SYSID},
 226         {"table", TABLE},
 227         {"temp", TEMP},
 228         {"temporary", TEMPORARY},
 229         {"then", THEN},
 230         {"time", TIME},
 231         {"timestamp", TIMESTAMP},
 232         {"timezone_hour", TIMEZONE_HOUR},
 233         {"timezone_minute", TIMEZONE_MINUTE},
 234         {"to", TO},
 235         {"trailing", TRAILING},
 236         {"transaction", TRANSACTION},
 237         {"trigger", TRIGGER},
 238         {"trim", TRIM},
 239         {"true", TRUE_P},
 240         {"truncate", TRUNCATE},
 241         {"trusted", TRUSTED},
 242         {"type", TYPE_P},
 243         {"union", UNION},
 244         {"unique", UNIQUE},
 245         {"unlisten", UNLISTEN},
 246         {"until", UNTIL},
 247         {"update", UPDATE},
 248         {"user", USER},
 249         {"using", USING},
 250         {"vacuum", VACUUM},
 251         {"valid", VALID},
 252         {"values", VALUES},
 253         {"varchar", VARCHAR},
 254         {"varying", VARYING},
 255         {"verbose", VERBOSE},
 256         {"version", VERSION},
 257         {"view", VIEW},
 258         {"when", WHEN},
 259         {"where", WHERE},
 260         {"with", WITH},
 261         {"work", WORK},
 262         {"year", YEAR_P},
 263         {"zone", ZONE},
 264 };
 265
 266 ScanKeyword *
 267 ScanKeywordLookup(char *text)
 268 {
 269         ScanKeyword *low = &ScanKeywords[0];
 270         ScanKeyword *high = endof(ScanKeywords) - 1;
 271         ScanKeyword *middle;
 272         int                     difference;
 273
 274         while (low <= high)
 275         {
 276                 middle = low + (high - low) / 2;
 277                 difference = strcmp(middle->name, text);
 278                 if (difference == 0)
 279                         return middle;
 280                 else if (difference < 0)
 281                         low = middle + 1;
 282                 else
 283                         high = middle - 1;
 284         }
 285
 286         return NULL;
 287 }