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) 1996-2001, PostgreSQL Global Development Group
   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 1.88 2001/01/24 19:43:01 momjian 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         {"analyse", ANALYSE}, /* British spelling */
  42         {"analyze", ANALYZE},
  43         {"and", AND},
  44         {"any", ANY},
  45         {"as", AS},
  46         {"asc", ASC},
  47         {"at", AT},
  48         {"backward", BACKWARD},
  49         {"before", BEFORE},
  50         {"begin", BEGIN_TRANS},
  51         {"between", BETWEEN},
  52         {"binary", BINARY},
  53         {"bit", BIT},
  54         {"both", BOTH},
  55         {"by", BY},
  56         {"cache", CACHE},
  57         {"cascade", CASCADE},
  58         {"case", CASE},
  59         {"cast", CAST},
  60         {"chain", CHAIN},
  61         {"char", CHAR},
  62         {"character", CHARACTER},
  63         {"characteristics", CHARACTERISTICS},
  64         {"check", CHECK},
  65         {"checkpoint", CHECKPOINT},
  66         {"close", CLOSE},
  67         {"cluster", CLUSTER},
  68         {"coalesce", COALESCE},
  69         {"collate", COLLATE},
  70         {"column", COLUMN},
  71         {"comment", COMMENT},
  72         {"commit", COMMIT},
  73         {"committed", COMMITTED},
  74         {"constraint", CONSTRAINT},
  75         {"constraints", CONSTRAINTS},
  76         {"copy", COPY},
  77         {"create", CREATE},
  78         {"createdb", CREATEDB},
  79         {"createuser", CREATEUSER},
  80         {"cross", CROSS},
  81         {"current_date", CURRENT_DATE},
  82         {"current_time", CURRENT_TIME},
  83         {"current_timestamp", CURRENT_TIMESTAMP},
  84         {"current_user", CURRENT_USER},
  85         {"cursor", CURSOR},
  86         {"cycle", CYCLE},
  87         {"database", DATABASE},
  88         {"day", DAY_P},
  89         {"dec", DEC},
  90         {"decimal", DECIMAL},
  91         {"declare", DECLARE},
  92         {"default", DEFAULT},
  93         {"deferrable", DEFERRABLE},
  94         {"deferred", DEFERRED},
  95         {"delete", DELETE},
  96         {"delimiters", DELIMITERS},
  97         {"desc", DESC},
  98         {"distinct", DISTINCT},
  99         {"do", DO},
 100         {"double", DOUBLE},
 101         {"drop", DROP},
 102         {"each", EACH},
 103         {"else", ELSE},
 104         {"encoding", ENCODING},
 105         {"end", END_TRANS},
 106         {"escape", ESCAPE},
 107         {"except", EXCEPT},
 108         {"exclusive", EXCLUSIVE},
 109         {"execute", EXECUTE},
 110         {"exists", EXISTS},
 111         {"explain", EXPLAIN},
 112         {"extend", EXTEND},
 113         {"extract", EXTRACT},
 114         {"false", FALSE_P},
 115         {"fetch", FETCH},
 116         {"float", FLOAT},
 117         {"for", FOR},
 118         {"force", FORCE},
 119         {"foreign", FOREIGN},
 120         {"forward", FORWARD},
 121         {"from", FROM},
 122         {"full", FULL},
 123         {"function", FUNCTION},
 124         {"global", GLOBAL},
 125         {"grant", GRANT},
 126         {"group", GROUP},
 127         {"handler", HANDLER},
 128         {"having", HAVING},
 129         {"hour", HOUR_P},
 130         {"ilike", ILIKE},
 131         {"immediate", IMMEDIATE},
 132         {"in", IN},
 133         {"increment", INCREMENT},
 134         {"index", INDEX},
 135         {"inherits", INHERITS},
 136         {"initially", INITIALLY},
 137         {"inner", INNER_P},
 138         {"inout", INOUT},
 139         {"insensitive", INSENSITIVE},
 140         {"insert", INSERT},
 141         {"instead", INSTEAD},
 142         {"intersect", INTERSECT},
 143         {"interval", INTERVAL},
 144         {"into", INTO},
 145         {"is", IS},
 146         {"isnull", ISNULL},
 147         {"isolation", ISOLATION},
 148         {"join", JOIN},
 149         {"key", KEY},
 150         {"lancompiler", LANCOMPILER},
 151         {"language", LANGUAGE},
 152         {"leading", LEADING},
 153         {"left", LEFT},
 154         {"level", LEVEL},
 155         {"like", LIKE},
 156         {"limit", LIMIT},
 157         {"listen", LISTEN},
 158         {"load", LOAD},
 159         {"local", LOCAL},
 160         {"location", LOCATION},
 161         {"lock", LOCK_P},
 162         {"match", MATCH},
 163         {"maxvalue", MAXVALUE},
 164         {"minute", MINUTE_P},
 165         {"minvalue", MINVALUE},
 166         {"mode", MODE},
 167         {"month", MONTH_P},
 168         {"move", MOVE},
 169         {"names", NAMES},
 170         {"national", NATIONAL},
 171         {"natural", NATURAL},
 172         {"nchar", NCHAR},
 173         {"new", NEW},
 174         {"next", NEXT},
 175         {"no", NO},
 176         {"nocreatedb", NOCREATEDB},
 177         {"nocreateuser", NOCREATEUSER},
 178         {"none", NONE},
 179         {"not", NOT},
 180         {"nothing", NOTHING},
 181         {"notify", NOTIFY},
 182         {"notnull", NOTNULL},
 183         {"null", NULL_P},
 184         {"nullif", NULLIF},
 185         {"numeric", NUMERIC},
 186         {"of", OF},
 187         {"off", OFF},
 188         {"offset", OFFSET},
 189         {"oids", OIDS},
 190         {"old", OLD},
 191         {"on", ON},
 192         {"only", ONLY},
 193         {"operator", OPERATOR},
 194         {"option", OPTION},
 195         {"or", OR},
 196         {"order", ORDER},
 197         {"out", OUT},
 198         {"outer", OUTER_P},
 199         {"overlaps", OVERLAPS},
 200         {"owner", OWNER},
 201         {"partial", PARTIAL},
 202         {"password", PASSWORD},
 203         {"path", PATH_P},
 204         {"pendant", PENDANT},
 205         {"position", POSITION},
 206         {"precision", PRECISION},
 207         {"primary", PRIMARY},
 208         {"prior", PRIOR},
 209         {"privileges", PRIVILEGES},
 210         {"procedural", PROCEDURAL},
 211         {"procedure", PROCEDURE},
 212         {"public", PUBLIC},
 213         {"read", READ},
 214         {"references", REFERENCES},
 215         {"reindex", REINDEX},
 216         {"relative", RELATIVE},
 217         {"rename", RENAME},
 218         {"reset", RESET},
 219         {"restrict", RESTRICT},
 220         {"returns", RETURNS},
 221         {"revoke", REVOKE},
 222         {"right", RIGHT},
 223         {"rollback", ROLLBACK},
 224         {"row", ROW},
 225         {"rule", RULE},
 226         {"schema", SCHEMA},
 227         {"scroll", SCROLL},
 228         {"second", SECOND_P},
 229         {"select", SELECT},
 230         {"sequence", SEQUENCE},
 231         {"serial", SERIAL},
 232         {"serializable", SERIALIZABLE},
 233         {"session", SESSION},
 234         {"session_user", SESSION_USER},
 235         {"set", SET},
 236         {"setof", SETOF},
 237         {"share", SHARE},
 238         {"show", SHOW},
 239         {"some", SOME},
 240         {"start", START},
 241         {"statement", STATEMENT},
 242         {"stdin", STDIN},
 243         {"stdout", STDOUT},
 244         {"substring", SUBSTRING},
 245         {"sysid", SYSID},
 246         {"table", TABLE},
 247         {"temp", TEMP},
 248         {"template", TEMPLATE},
 249         {"temporary", TEMPORARY},
 250         {"then", THEN},
 251         {"time", TIME},
 252         {"timestamp", TIMESTAMP},
 253         {"timezone_hour", TIMEZONE_HOUR},
 254         {"timezone_minute", TIMEZONE_MINUTE},
 255         {"to", TO},
 256         {"toast", TOAST},
 257         {"trailing", TRAILING},
 258         {"transaction", TRANSACTION},
 259         {"trigger", TRIGGER},
 260         {"trim", TRIM},
 261         {"true", TRUE_P},
 262         {"truncate", TRUNCATE},
 263         {"trusted", TRUSTED},
 264         {"type", TYPE_P},
 265         {"union", UNION},
 266         {"unique", UNIQUE},
 267         {"unlisten", UNLISTEN},
 268         {"until", UNTIL},
 269         {"update", UPDATE},
 270         {"user", USER},
 271         {"using", USING},
 272         {"vacuum", VACUUM},
 273         {"valid", VALID},
 274         {"values", VALUES},
 275         {"varchar", VARCHAR},
 276         {"varying", VARYING},
 277         {"verbose", VERBOSE},
 278         {"version", VERSION},
 279         {"view", VIEW},
 280         {"when", WHEN},
 281         {"where", WHERE},
 282         {"with", WITH},
 283         {"without", WITHOUT},
 284         {"work", WORK},
 285         {"year", YEAR_P},
 286         {"zone", ZONE},
 287 };
 288
 289 ScanKeyword *
 290 ScanKeywordLookup(char *text)
 291 {
 292         ScanKeyword *low = &ScanKeywords[0];
 293         ScanKeyword *high = endof(ScanKeywords) - 1;
 294         ScanKeyword *middle;
 295         int                     difference;
 296
 297         while (low <= high)
 298         {
 299                 middle = low + (high - low) / 2;
 300                 difference = strcmp(middle->name, text);
 301                 if (difference == 0)
 302                         return middle;
 303                 else if (difference < 0)
 304                         low = middle + 1;
 305                 else
 306                         high = middle - 1;
 307         }
 308
 309         return NULL;
 310 }