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 1.79 2000/07/14 15:43:32 thomas Exp $
  12  *
  13  *-------------------------------------------------------------------------
  14  */
  15 #include <ctype.h>
  16
  17 #include "postgres.h"
  18
  19 #include "nodes/parsenodes.h"
  20 #include "nodes/pg_list.h"
  21 #include "parser/keywords.h"
  22 #include "parser/parse.h"
  23
  24 /*
  25  * List of (keyword-name, keyword-token-value) pairs.
  26  *
  27  * !!WARNING!!: This list must be sorted, because binary
  28  *               search is used to locate entries.
  29  */
  30 static ScanKeyword ScanKeywords[] = {
  31         /* name, value */
  32         {"abort", ABORT_TRANS},
  33         {"absolute", ABSOLUTE},
  34         {"access", ACCESS},
  35         {"action", ACTION},
  36         {"add", ADD},
  37         {"after", AFTER},
  38         {"aggregate", AGGREGATE},
  39         {"all", ALL},
  40         {"alter", ALTER},
  41         {"analyze", ANALYZE},
  42         {"and", AND},
  43         {"any", ANY},
  44         {"as", AS},
  45         {"asc", ASC},
  46         {"backward", BACKWARD},
  47         {"before", BEFORE},
  48         {"begin", BEGIN_TRANS},
  49         {"between", BETWEEN},
  50         {"binary", BINARY},
  51         {"bit", BIT},
  52         {"both", BOTH},
  53         {"by", BY},
  54         {"cache", CACHE},
  55         {"cascade", CASCADE},
  56         {"case", CASE},
  57         {"cast", CAST},
  58         {"char", CHAR},
  59         {"character", CHARACTER},
  60         {"characteristics", CHARACTERISTICS},
  61         {"check", CHECK},
  62         {"close", CLOSE},
  63         {"cluster", CLUSTER},
  64         {"coalesce", COALESCE},
  65         {"collate", COLLATE},
  66         {"column", COLUMN},
  67         {"comment", COMMENT},
  68         {"commit", COMMIT},
  69         {"committed", COMMITTED},
  70         {"constraint", CONSTRAINT},
  71         {"constraints", CONSTRAINTS},
  72         {"copy", COPY},
  73         {"create", CREATE},
  74         {"createdb", CREATEDB},
  75         {"createuser", CREATEUSER},
  76         {"cross", CROSS},
  77         /* for portability with old rules bjm 2000-06-12 */
  78         {"current", OLD},
  79         {"current_date", CURRENT_DATE},
  80         {"current_time", CURRENT_TIME},
  81         {"current_timestamp", CURRENT_TIMESTAMP},
  82         {"current_user", CURRENT_USER},
  83         {"cursor", CURSOR},
  84         {"cycle", CYCLE},
  85         {"database", DATABASE},
  86         {"day", DAY_P},
  87         {"dec", DEC},
  88         {"decimal", DECIMAL},
  89         {"declare", DECLARE},
  90         {"default", DEFAULT},
  91         {"deferrable", DEFERRABLE},
  92         {"deferred", DEFERRED},
  93         {"delete", DELETE},
  94         {"delimiters", DELIMITERS},
  95         {"desc", DESC},
  96         {"distinct", DISTINCT},
  97         {"do", DO},
  98         {"double", DOUBLE},
  99         {"drop", DROP},
 100         {"each", EACH},
 101         {"else", ELSE},
 102         {"encoding", ENCODING},
 103         {"end", END_TRANS},
 104         {"except", EXCEPT},
 105         {"exclusive", EXCLUSIVE},
 106         {"execute", EXECUTE},
 107         {"exists", EXISTS},
 108         {"explain", EXPLAIN},
 109         {"extend", EXTEND},
 110         {"extract", EXTRACT},
 111         {"false", FALSE_P},
 112         {"fetch", FETCH},
 113         {"float", FLOAT},
 114         {"for", FOR},
 115         {"force", FORCE},
 116         {"foreign", FOREIGN},
 117         {"forward", FORWARD},
 118         {"from", FROM},
 119         {"full", FULL},
 120         {"function", FUNCTION},
 121         {"global", GLOBAL},
 122         {"grant", GRANT},
 123         {"group", GROUP},
 124         {"handler", HANDLER},
 125         {"having", HAVING},
 126         {"hour", HOUR_P},
 127         {"immediate", IMMEDIATE},
 128         {"in", IN},
 129         {"increment", INCREMENT},
 130         {"index", INDEX},
 131         {"inherits", INHERITS},
 132         {"initially", INITIALLY},
 133         {"inner", INNER_P},
 134         {"inout", INOUT},
 135         {"insensitive", INSENSITIVE},
 136         {"insert", INSERT},
 137         {"instead", INSTEAD},
 138         {"intersect", INTERSECT},
 139         {"interval", INTERVAL},
 140         {"into", INTO},
 141         {"is", IS},
 142         {"isnull", ISNULL},
 143         {"isolation", ISOLATION},
 144         {"join", JOIN},
 145         {"key", KEY},
 146         {"lancompiler", LANCOMPILER},
 147         {"language", LANGUAGE},
 148         {"leading", LEADING},
 149         {"left", LEFT},
 150         {"level", LEVEL},
 151         {"like", LIKE},
 152         {"limit", LIMIT},
 153         {"listen", LISTEN},
 154         {"load", LOAD},
 155         {"local", LOCAL},
 156         {"location", LOCATION},
 157         {"lock", LOCK_P},
 158         {"match", MATCH},
 159         {"maxvalue", MAXVALUE},
 160         {"minute", MINUTE_P},
 161         {"minvalue", MINVALUE},
 162         {"mode", MODE},
 163         {"month", MONTH_P},
 164         {"move", MOVE},
 165         {"names", NAMES},
 166         {"national", NATIONAL},
 167         {"natural", NATURAL},
 168         {"nchar", NCHAR},
 169         {"new", NEW},
 170         {"next", NEXT},
 171         {"no", NO},
 172         {"nocreatedb", NOCREATEDB},
 173         {"nocreateuser", NOCREATEUSER},
 174         {"none", NONE},
 175         {"not", NOT},
 176         {"nothing", NOTHING},
 177         {"notify", NOTIFY},
 178         {"notnull", NOTNULL},
 179         {"null", NULL_P},
 180         {"nullif", NULLIF},
 181         {"numeric", NUMERIC},
 182         {"of", OF},
 183         {"off", OFF},
 184         {"offset", OFFSET},
 185         {"oids", OIDS},
 186         {"old", OLD},
 187         {"on", ON},
 188         {"only", ONLY},
 189         {"operator", OPERATOR},
 190         {"option", OPTION},
 191         {"or", OR},
 192         {"order", ORDER},
 193         {"out", OUT},
 194         {"outer", OUTER_P},
 195         {"overlaps", OVERLAPS},
 196         {"partial", PARTIAL},
 197         {"password", PASSWORD},
 198         {"path", PATH_P},
 199         {"pendant", PENDANT},
 200         {"position", POSITION},
 201         {"precision", PRECISION},
 202         {"primary", PRIMARY},
 203         {"prior", PRIOR},
 204         {"privileges", PRIVILEGES},
 205         {"procedural", PROCEDURAL},
 206         {"procedure", PROCEDURE},
 207         {"public", PUBLIC},
 208         {"read", READ},
 209         {"references", REFERENCES},
 210         {"reindex", REINDEX},
 211         {"relative", RELATIVE},
 212         {"rename", RENAME},
 213         {"reset", RESET},
 214         {"restrict", RESTRICT},
 215         {"returns", RETURNS},
 216         {"revoke", REVOKE},
 217         {"right", RIGHT},
 218         {"rollback", ROLLBACK},
 219         {"row", ROW},
 220         {"rule", RULE},
 221         {"schema", SCHEMA},
 222         {"scroll", SCROLL},
 223         {"second", SECOND_P},
 224         {"select", SELECT},
 225         {"sequence", SEQUENCE},
 226         {"serial", SERIAL},
 227         {"serializable", SERIALIZABLE},
 228         {"session", SESSION},
 229         {"session_user", SESSION_USER},
 230         {"set", SET},
 231         {"setof", SETOF},
 232         {"share", SHARE},
 233         {"show", SHOW},
 234         {"some", SOME},
 235         {"start", START},
 236         {"statement", STATEMENT},
 237         {"stdin", STDIN},
 238         {"stdout", STDOUT},
 239         {"substring", SUBSTRING},
 240         {"sysid", SYSID},
 241         {"table", TABLE},
 242         {"temp", TEMP},
 243         {"temporary", TEMPORARY},
 244         {"then", THEN},
 245         {"time", TIME},
 246         {"timestamp", TIMESTAMP},
 247         {"timezone_hour", TIMEZONE_HOUR},
 248         {"timezone_minute", TIMEZONE_MINUTE},
 249         {"to", TO},
 250         {"toast", TOAST},
 251         {"trailing", TRAILING},
 252         {"transaction", TRANSACTION},
 253         {"trigger", TRIGGER},
 254         {"trim", TRIM},
 255         {"true", TRUE_P},
 256         {"truncate", TRUNCATE},
 257         {"trusted", TRUSTED},
 258         {"type", TYPE_P},
 259         {"under", UNDER},
 260         {"union", UNION},
 261         {"unique", UNIQUE},
 262         {"unlisten", UNLISTEN},
 263         {"until", UNTIL},
 264         {"update", UPDATE},
 265         {"user", USER},
 266         {"using", USING},
 267         {"vacuum", VACUUM},
 268         {"valid", VALID},
 269         {"values", VALUES},
 270         {"varchar", VARCHAR},
 271         {"varying", VARYING},
 272         {"verbose", VERBOSE},
 273         {"version", VERSION},
 274         {"view", VIEW},
 275         {"when", WHEN},
 276         {"where", WHERE},
 277         {"with", WITH},
 278         {"without", WITHOUT},
 279         {"work", WORK},
 280         {"year", YEAR_P},
 281         {"zone", ZONE},
 282 };
 283
 284 ScanKeyword *
 285 ScanKeywordLookup(char *text)
 286 {
 287         ScanKeyword *low = &ScanKeywords[0];
 288         ScanKeyword *high = endof(ScanKeywords) - 1;
 289         ScanKeyword *middle;
 290         int                     difference;
 291
 292         while (low <= high)
 293         {
 294                 middle = low + (high - low) / 2;
 295                 difference = strcmp(middle->name, text);
 296                 if (difference == 0)
 297                         return middle;
 298                 else if (difference < 0)
 299                         low = middle + 1;
 300                 else
 301                         high = middle - 1;
 302         }
 303
 304         return NULL;
 305 }