key word list of lists all tokens that are key words in the SQL standard and in PostgreSQL &version;. Background information can be found in . SQL distinguishes between reserved and non-reserved key words. According to the standard, reserved key words are the only real key words; they are never allowed as identifiers. Non-reserved key words only have a special meaning in particular contexts and can be used as identifiers in other contexts. Most non-reserved key words are actually the names of built-in tables and functions specified by SQL. The concept of non-reserved key words essentially only exists to declare that some predefined meaning is attached to a word in some contexts. In the PostgreSQL parser life is a bit more complicated. There are several different classes of tokens ranging from those that can never be used as an identifier to those that have absolutely no special status in the parser as compared to an ordinary identifier. (The latter is usually the case for functions specified by SQL.) Even reserved key words are not completely reserved in PostgreSQL, but can be used as column labels (for example, SELECT 55 AS CHECK, even though CHECK is a reserved key word). In in the column for PostgreSQL we classify as non-reserved those key words that are explicitly known to the parser but are allowed in most or all contexts where an identifier is expected. Some key words that are otherwise non-reserved cannot be used as function or data type names and are marked accordingly. (Most of these words represent built-in functions or data types with special syntax. The function or type is still available but it cannot be redefined by the user.) Labeled reserved are those tokens that are only allowed as AS column label names (and perhaps in very few other contexts). Some reserved key words are allowable as names for functions; this is also shown in the table. As a general rule, if you get spurious parser errors for commands that contain any of the listed key words as an identifier you should try to quote the identifier to see if the problem goes away. It is important to understand before studying that the fact that a key word is not reserved in PostgreSQL does not mean that the feature related to the word is not implemented. Conversely, the presence of a key word does not indicate the existence of a feature. Key Word PostgreSQL SQL:2003 SQL:1999 SQL-92 A non-reserved ABORT non-reserved ABS reserved non-reserved ABSOLUTE non-reserved non-reserved reserved reserved ACCESS non-reserved ACTION non-reserved non-reserved reserved reserved ADA non-reserved non-reserved non-reserved ADD non-reserved non-reserved reserved reserved ADMIN non-reserved reserved AFTER non-reserved non-reserved reserved AGGREGATE non-reserved reserved ALIAS reserved ALL reserved reserved reserved reserved ALLOCATE reserved reserved reserved ALSO non-reserved ALTER non-reserved reserved reserved reserved ALWAYS non-reserved ANALYSE reserved ANALYZE reserved AND reserved reserved reserved reserved ANY reserved reserved reserved reserved ARE reserved reserved reserved ARRAY reserved reserved reserved AS reserved reserved reserved reserved ASC reserved non-reserved reserved reserved ASENSITIVE reserved non-reserved ASSERTION non-reserved non-reserved reserved reserved ASSIGNMENT non-reserved non-reserved non-reserved ASYMMETRIC reserved non-reserved AT non-reserved reserved reserved reserved ATOMIC reserved non-reserved ATTRIBUTE non-reserved ATTRIBUTES non-reserved AUTHORIZATION reserved (can be function) reserved reserved reserved AVG reserved non-reserved reserved BACKWARD non-reserved BEFORE non-reserved non-reserved reserved BEGIN non-reserved reserved reserved reserved BERNOULLI non-reserved BETWEEN reserved (can be function) reserved non-reserved reserved BIGINT non-reserved (cannot be function or type) reserved BINARY reserved (can be function) reserved reserved BIT non-reserved (cannot be function or type) reserved reserved BITVAR non-reserved BIT_LENGTH non-reserved reserved BLOB reserved reserved BOOLEAN non-reserved (cannot be function or type) reserved reserved BOTH reserved reserved reserved reserved BREADTH non-reserved reserved BY non-reserved reserved reserved reserved C non-reserved non-reserved non-reserved CACHE non-reserved CALL reserved reserved CALLED non-reserved reserved non-reserved CARDINALITY reserved non-reserved CASCADE non-reserved non-reserved reserved reserved CASCADED reserved reserved reserved CASE reserved reserved reserved reserved CAST reserved reserved reserved reserved CATALOG non-reserved reserved reserved CATALOG_NAME non-reserved non-reserved non-reserved CEIL reserved CEILING reserved CHAIN non-reserved non-reserved non-reserved CHAR non-reserved (cannot be function or type) reserved reserved reserved CHARACTER non-reserved (cannot be function or type) reserved reserved reserved CHARACTERISTICS non-reserved non-reserved CHARACTERS non-reserved CHARACTER_LENGTH reserved non-reserved reserved CHARACTER_SET_CATALOG non-reserved non-reserved non-reserved CHARACTER_SET_NAME non-reserved non-reserved non-reserved CHARACTER_SET_SCHEMA non-reserved non-reserved non-reserved CHAR_LENGTH reserved non-reserved reserved CHECK reserved reserved reserved reserved CHECKED non-reserved CHECKPOINT non-reserved CLASS non-reserved reserved CLASS_ORIGIN non-reserved non-reserved non-reserved CLOB reserved reserved CLOSE non-reserved reserved reserved reserved CLUSTER non-reserved COALESCE non-reserved (cannot be function or type) reserved non-reserved reserved COBOL non-reserved non-reserved non-reserved COLLATE reserved reserved reserved reserved COLLATION non-reserved reserved reserved COLLATION_CATALOG non-reserved non-reserved non-reserved COLLATION_NAME non-reserved non-reserved non-reserved COLLATION_SCHEMA non-reserved non-reserved non-reserved COLLECT reserved COLUMN reserved reserved reserved reserved COLUMN_NAME non-reserved non-reserved non-reserved COMMAND_FUNCTION non-reserved non-reserved non-reserved COMMAND_FUNCTION_CODE non-reserved non-reserved COMMENT non-reserved COMMIT non-reserved reserved reserved reserved COMMITTED non-reserved non-reserved non-reserved non-reserved COMPLETION reserved CONDITION reserved CONDITION_NUMBER non-reserved non-reserved non-reserved CONNECT reserved reserved reserved CONNECTION non-reserved reserved reserved CONNECTION_NAME non-reserved non-reserved non-reserved CONSTRAINT reserved reserved reserved reserved CONSTRAINTS non-reserved non-reserved reserved reserved CONSTRAINT_CATALOG non-reserved non-reserved non-reserved CONSTRAINT_NAME non-reserved non-reserved non-reserved CONSTRAINT_SCHEMA non-reserved non-reserved non-reserved CONSTRUCTOR non-reserved reserved CONTAINS non-reserved non-reserved CONTINUE non-reserved reserved reserved CONVERSION non-reserved CONVERT non-reserved (cannot be function or type) reserved non-reserved reserved COPY non-reserved CORR reserved CORRESPONDING reserved reserved reserved COUNT reserved non-reserved reserved COVAR_POP reserved COVAR_SAMP reserved CREATE reserved reserved reserved reserved CREATEDB non-reserved CREATEUSER non-reserved CROSS reserved (can be function) reserved reserved reserved CSV non-reserved CUBE reserved reserved CUME_DIST reserved CURRENT reserved reserved reserved CURRENT_DATE reserved reserved reserved reserved CURRENT_DEFAULT_TRANSFORM_GROUP reserved CURRENT_PATH reserved reserved CURRENT_ROLE reserved reserved CURRENT_TIME reserved reserved reserved reserved CURRENT_TIMESTAMP reserved reserved reserved reserved CURRENT_TRANSFORM_GROUP_FOR_TYPE reserved CURRENT_USER reserved reserved reserved reserved CURSOR non-reserved reserved reserved reserved CURSOR_NAME non-reserved non-reserved non-reserved CYCLE non-reserved reserved reserved DATA non-reserved reserved non-reserved DATABASE non-reserved DATE reserved reserved reserved DATETIME_INTERVAL_CODE non-reserved non-reserved non-reserved DATETIME_INTERVAL_PRECISION non-reserved non-reserved non-reserved DAY non-reserved reserved reserved reserved DEALLOCATE non-reserved reserved reserved reserved DEC non-reserved (cannot be function or type) reserved reserved reserved DECIMAL non-reserved (cannot be function or type) reserved reserved reserved DECLARE non-reserved reserved reserved reserved DEFAULT reserved reserved reserved reserved DEFAULTS non-reserved non-reserved DEFERRABLE reserved non-reserved reserved reserved DEFERRED non-reserved non-reserved reserved reserved DEFINED non-reserved non-reserved DEFINER non-reserved non-reserved non-reserved DEGREE non-reserved DELETE non-reserved reserved reserved reserved DELIMITER non-reserved DELIMITERS non-reserved DENSE_RANK reserved DEPTH non-reserved reserved DEREF reserved reserved DERIVED non-reserved DESC reserved non-reserved reserved reserved DESCRIBE reserved reserved reserved DESCRIPTOR non-reserved reserved reserved DESTROY reserved DESTRUCTOR reserved DETERMINISTIC reserved reserved DIAGNOSTICS non-reserved reserved reserved DICTIONARY reserved DISCONNECT reserved reserved reserved DISPATCH non-reserved non-reserved DISTINCT reserved reserved reserved reserved DO reserved DOMAIN non-reserved non-reserved reserved reserved DOUBLE non-reserved reserved reserved reserved DROP non-reserved reserved reserved reserved DYNAMIC reserved reserved DYNAMIC_FUNCTION non-reserved non-reserved non-reserved DYNAMIC_FUNCTION_CODE non-reserved non-reserved EACH non-reserved reserved reserved ELEMENT reserved ELSE reserved reserved reserved reserved ENCODING non-reserved ENCRYPTED non-reserved END reserved reserved reserved reserved END-EXEC reserved reserved reserved EQUALS non-reserved reserved ESCAPE non-reserved reserved reserved reserved EVERY reserved reserved EXCEPT reserved reserved reserved reserved EXCEPTION non-reserved reserved reserved EXCLUDE non-reserved EXCLUDING non-reserved non-reserved EXCLUSIVE non-reserved EXEC reserved reserved reserved EXECUTE non-reserved reserved reserved reserved EXISTING non-reserved EXISTS non-reserved (cannot be function or type) reserved non-reserved reserved EXP reserved EXPLAIN non-reserved EXTERNAL non-reserved reserved reserved reserved EXTRACT non-reserved (cannot be function or type) reserved non-reserved reserved FALSE reserved reserved reserved reserved FETCH non-reserved reserved reserved reserved FILTER reserved FINAL non-reserved non-reserved FIRST non-reserved non-reserved reserved reserved FLOAT non-reserved (cannot be function or type) reserved reserved reserved FLOOR reserved FOLLOWING non-reserved FOR reserved reserved reserved reserved FORCE non-reserved FOREIGN reserved reserved reserved reserved FORTRAN non-reserved non-reserved non-reserved FORWARD non-reserved FOUND non-reserved reserved reserved FREE reserved reserved FREEZE reserved (can be function) FROM reserved reserved reserved reserved FULL reserved (can be function) reserved reserved reserved FUNCTION non-reserved reserved reserved FUSION reserved G non-reserved non-reserved GENERAL non-reserved reserved GENERATED non-reserved non-reserved GET reserved reserved reserved GLOBAL non-reserved reserved reserved reserved GO non-reserved reserved reserved GOTO non-reserved reserved reserved GRANT reserved reserved reserved reserved GRANTED non-reserved non-reserved GROUP reserved reserved reserved reserved GROUPING reserved reserved HANDLER non-reserved HAVING reserved reserved reserved reserved HIERARCHY non-reserved non-reserved HOLD non-reserved reserved non-reserved HOST reserved HOUR non-reserved reserved reserved reserved IDENTITY reserved reserved reserved IGNORE reserved ILIKE reserved (can be function) IMMEDIATE non-reserved non-reserved reserved reserved IMMUTABLE non-reserved IMPLEMENTATION non-reserved non-reserved IMPLICIT non-reserved IN reserved reserved reserved reserved INCLUDING non-reserved non-reserved INCREMENT non-reserved non-reserved INDEX non-reserved INDICATOR reserved reserved reserved INFIX non-reserved INHERITS non-reserved INITIALIZE reserved INITIALLY reserved non-reserved reserved reserved INNER reserved (can be function) reserved reserved reserved INOUT non-reserved (cannot be function or type) reserved reserved INPUT non-reserved non-reserved reserved reserved INSENSITIVE non-reserved reserved non-reserved reserved INSERT non-reserved reserved reserved reserved INSTANCE non-reserved non-reserved INSTANTIABLE non-reserved non-reserved INSTEAD non-reserved INT non-reserved (cannot be function or type) reserved reserved reserved INTEGER non-reserved (cannot be function or type) reserved reserved reserved INTERSECT reserved reserved reserved reserved INTERSECTION reserved INTERVAL non-reserved (cannot be function or type) reserved reserved reserved INTO reserved reserved reserved reserved INVOKER non-reserved non-reserved non-reserved IS reserved (can be function) reserved reserved reserved ISNULL reserved (can be function) ISOLATION non-reserved non-reserved reserved reserved ITERATE reserved JOIN reserved (can be function) reserved reserved reserved K non-reserved non-reserved KEY non-reserved non-reserved reserved reserved KEY_MEMBER non-reserved non-reserved KEY_TYPE non-reserved non-reserved LANCOMPILER non-reserved LANGUAGE non-reserved reserved reserved reserved LARGE non-reserved reserved reserved LAST non-reserved non-reserved reserved reserved LATERAL reserved reserved LEADING reserved reserved reserved reserved LEFT reserved (can be function) reserved reserved reserved LENGTH non-reserved non-reserved non-reserved LESS reserved LEVEL non-reserved non-reserved reserved reserved LIKE reserved (can be function) reserved reserved reserved LIMIT reserved reserved LISTEN non-reserved LN reserved LOAD non-reserved LOCAL non-reserved reserved reserved reserved LOCALTIME reserved reserved reserved LOCALTIMESTAMP reserved reserved reserved LOCATION non-reserved LOCATOR non-reserved reserved LOCK non-reserved LOWER reserved non-reserved reserved M non-reserved non-reserved MAP non-reserved reserved MATCH non-reserved reserved reserved reserved MATCHED non-reserved MAX reserved non-reserved reserved MAXVALUE non-reserved non-reserved MEMBER reserved MERGE reserved MESSAGE_LENGTH non-reserved non-reserved non-reserved MESSAGE_OCTET_LENGTH non-reserved non-reserved non-reserved MESSAGE_TEXT non-reserved non-reserved non-reserved METHOD reserved non-reserved MIN reserved non-reserved reserved MINUTE non-reserved reserved reserved reserved MINVALUE non-reserved non-reserved MOD reserved non-reserved MODE non-reserved MODIFIES reserved reserved MODIFY reserved MODULE reserved reserved reserved MONTH non-reserved reserved reserved reserved MORE non-reserved non-reserved non-reserved MOVE non-reserved MULTISET reserved MUMPS non-reserved non-reserved non-reserved NAME non-reserved non-reserved non-reserved NAMES non-reserved non-reserved reserved reserved NATIONAL non-reserved (cannot be function or type) reserved reserved reserved NATURAL reserved (can be function) reserved reserved reserved NCHAR non-reserved (cannot be function or type) reserved reserved reserved NCLOB reserved reserved NESTING non-reserved NEW reserved reserved reserved NEXT non-reserved non-reserved reserved reserved NO non-reserved reserved reserved reserved NOCREATEDB non-reserved NOCREATEUSER non-reserved NONE non-reserved (cannot be function or type) reserved reserved NORMALIZE reserved NORMALIZED non-reserved NOT reserved reserved reserved reserved NOTHING non-reserved NOTIFY non-reserved NOTNULL reserved (can be function) NOWAIT non-reserved NULL reserved reserved reserved reserved NULLABLE non-reserved non-reserved non-reserved NULLIF non-reserved (cannot be function or type) reserved non-reserved reserved NULLS non-reserved NUMBER non-reserved non-reserved non-reserved NUMERIC non-reserved (cannot be function or type) reserved reserved reserved OBJECT non-reserved non-reserved reserved OCTETS non-reserved OCTET_LENGTH reserved non-reserved reserved OF non-reserved reserved reserved reserved OFF reserved reserved OFFSET reserved OIDS non-reserved OLD reserved reserved reserved ON reserved reserved reserved reserved ONLY reserved reserved reserved reserved OPEN reserved reserved reserved OPERATION reserved OPERATOR non-reserved OPTION non-reserved non-reserved reserved reserved OPTIONS non-reserved non-reserved OR reserved reserved reserved reserved ORDER reserved reserved reserved reserved ORDERING non-reserved ORDINALITY non-reserved reserved OTHERS non-reserved OUT non-reserved (cannot be function or type) reserved reserved OUTER reserved (can be function) reserved reserved reserved OUTPUT non-reserved reserved reserved OVER reserved OVERLAPS reserved (can be function) reserved non-reserved reserved OVERLAY non-reserved (cannot be function or type) reserved non-reserved OVERRIDING non-reserved non-reserved OWNER non-reserved PAD non-reserved reserved reserved PARAMETER reserved reserved PARAMETERS reserved PARAMETER_MODE non-reserved non-reserved PARAMETER_NAME non-reserved non-reserved PARAMETER_ORDINAL_POSITION non-reserved non-reserved PARAMETER_SPECIFIC_CATALOG non-reserved non-reserved PARAMETER_SPECIFIC_NAME non-reserved non-reserved PARAMETER_SPECIFIC_SCHEMA non-reserved non-reserved PARTIAL non-reserved non-reserved reserved reserved PARTITION reserved PASCAL non-reserved non-reserved non-reserved PASSWORD non-reserved PATH non-reserved reserved PERCENTILE_CONT reserved PERCENTILE_DISC reserved PERCENT_RANK reserved PLACING reserved non-reserved PLI non-reserved non-reserved non-reserved POSITION non-reserved (cannot be function or type) reserved non-reserved reserved POSTFIX reserved POWER reserved PRECEDING non-reserved PRECISION non-reserved (cannot be function or type) reserved reserved reserved PREFIX reserved PREORDER reserved PREPARE non-reserved reserved reserved reserved PRESERVE non-reserved non-reserved reserved reserved PRIMARY reserved reserved reserved reserved PRIOR non-reserved non-reserved reserved reserved PRIVILEGES non-reserved non-reserved reserved reserved PROCEDURAL non-reserved PROCEDURE non-reserved reserved reserved reserved PUBLIC non-reserved reserved reserved QUOTE non-reserved RANGE reserved RANK reserved READ non-reserved non-reserved reserved reserved READS reserved reserved REAL non-reserved (cannot be function or type) reserved reserved reserved RECHECK non-reserved RECURSIVE reserved reserved REF reserved reserved REFERENCES reserved reserved reserved reserved REFERENCING reserved reserved REGR_AVGX reserved REGR_AVGY reserved REGR_COUNT reserved REGR_INTERCEPT reserved REGR_R2 reserved REGR_SLOPE reserved REGR_SXX reserved REGR_SXY reserved REGR_SYY reserved REINDEX non-reserved RELATIVE non-reserved non-reserved reserved reserved RELEASE non-reserved reserved RENAME non-reserved REPEATABLE non-reserved non-reserved non-reserved non-reserved REPLACE non-reserved RESET non-reserved RESTART non-reserved non-reserved RESTRICT non-reserved non-reserved reserved reserved RESULT reserved reserved RETURN reserved reserved RETURNED_CARDINALITY non-reserved RETURNED_LENGTH non-reserved non-reserved non-reserved RETURNED_OCTET_LENGTH non-reserved non-reserved non-reserved RETURNED_SQLSTATE non-reserved non-reserved non-reserved RETURNS non-reserved reserved reserved REVOKE non-reserved reserved reserved reserved RIGHT reserved (can be function) reserved reserved reserved ROLE non-reserved reserved ROLLBACK non-reserved reserved reserved reserved ROLLUP reserved reserved ROUTINE non-reserved reserved ROUTINE_CATALOG non-reserved non-reserved ROUTINE_NAME non-reserved non-reserved ROUTINE_SCHEMA non-reserved non-reserved ROW non-reserved (cannot be function or type) reserved reserved ROWS non-reserved reserved reserved reserved ROW_COUNT non-reserved non-reserved non-reserved ROW_NUMBER reserved RULE non-reserved SAVEPOINT non-reserved reserved reserved SCALE non-reserved non-reserved non-reserved SCHEMA non-reserved non-reserved reserved reserved SCHEMA_NAME non-reserved non-reserved non-reserved SCOPE reserved reserved SCOPE_CATALOG non-reserved SCOPE_NAME non-reserved SCOPE_SCHEMA non-reserved SCROLL non-reserved reserved reserved reserved SEARCH reserved reserved SECOND non-reserved reserved reserved reserved SECTION non-reserved reserved reserved SECURITY non-reserved non-reserved non-reserved SELECT reserved reserved reserved reserved SELF non-reserved non-reserved SENSITIVE reserved non-reserved SEQUENCE non-reserved non-reserved reserved SERIALIZABLE non-reserved non-reserved non-reserved non-reserved SERVER_NAME non-reserved non-reserved non-reserved SESSION non-reserved non-reserved reserved reserved SESSION_USER reserved reserved reserved reserved SET non-reserved reserved reserved reserved SETOF non-reserved (cannot be function or type) SETS non-reserved reserved SHARE non-reserved SHOW non-reserved SIMILAR reserved (can be function) reserved non-reserved SIMPLE non-reserved non-reserved non-reserved SIZE non-reserved reserved reserved SMALLINT non-reserved (cannot be function or type) reserved reserved reserved SOME reserved reserved reserved reserved SOURCE non-reserved non-reserved SPACE non-reserved reserved reserved SPECIFIC reserved reserved SPECIFICTYPE reserved reserved SPECIFIC_NAME non-reserved non-reserved SQL reserved reserved reserved SQLCODE reserved SQLERROR reserved SQLEXCEPTION reserved reserved SQLSTATE reserved reserved reserved SQLWARNING reserved reserved SQRT reserved STABLE non-reserved START non-reserved reserved reserved STATE non-reserved reserved STATEMENT non-reserved non-reserved reserved STATIC reserved reserved STATISTICS non-reserved STDDEV_POP reserved STDDEV_SAMP reserved STDIN non-reserved STDOUT non-reserved STORAGE non-reserved STRICT non-reserved STRUCTURE non-reserved reserved STYLE non-reserved non-reserved SUBCLASS_ORIGIN non-reserved non-reserved non-reserved SUBLIST non-reserved SUBMULTISET reserved SUBSTRING non-reserved (cannot be function or type) reserved non-reserved reserved SUM reserved non-reserved reserved SYMMETRIC reserved non-reserved SYSID non-reserved SYSTEM reserved non-reserved SYSTEM_USER reserved reserved reserved TABLE reserved reserved reserved reserved TABLESAMPLE reserved TABLESPACE non-reserved TABLE_NAME non-reserved non-reserved non-reserved TEMP non-reserved TEMPLATE non-reserved TEMPORARY non-reserved non-reserved reserved reserved TERMINATE reserved THAN reserved THEN reserved reserved reserved reserved TIES non-reserved TIME non-reserved (cannot be function or type) reserved reserved reserved TIMESTAMP non-reserved (cannot be function or type) reserved reserved reserved TIMEZONE_HOUR reserved reserved reserved TIMEZONE_MINUTE reserved reserved reserved TO reserved reserved reserved reserved TOAST non-reserved TOP_LEVEL_COUNT non-reserved TRAILING reserved reserved reserved reserved TRANSACTION non-reserved non-reserved reserved reserved TRANSACTIONS_COMMITTED non-reserved non-reserved TRANSACTIONS_ROLLED_BACK non-reserved non-reserved TRANSACTION_ACTIVE non-reserved non-reserved TRANSFORM non-reserved non-reserved TRANSFORMS non-reserved non-reserved TRANSLATE reserved non-reserved reserved TRANSLATION reserved reserved reserved TREAT non-reserved (cannot be function or type) reserved reserved TRIGGER non-reserved reserved reserved TRIGGER_CATALOG non-reserved non-reserved TRIGGER_NAME non-reserved non-reserved TRIGGER_SCHEMA non-reserved non-reserved TRIM non-reserved (cannot be function or type) reserved non-reserved reserved TRUE reserved reserved reserved reserved TRUNCATE non-reserved TRUSTED non-reserved TYPE non-reserved non-reserved non-reserved non-reserved UESCAPE reserved UNBOUNDED non-reserved UNCOMMITTED non-reserved non-reserved non-reserved non-reserved UNDER non-reserved reserved UNENCRYPTED non-reserved UNION reserved reserved reserved reserved UNIQUE reserved reserved reserved reserved UNKNOWN non-reserved reserved reserved reserved UNLISTEN non-reserved UNNAMED non-reserved non-reserved non-reserved UNNEST reserved reserved UNTIL non-reserved UPDATE non-reserved reserved reserved reserved UPPER reserved non-reserved reserved USAGE non-reserved non-reserved reserved reserved USER reserved reserved reserved reserved USER_DEFINED_TYPE_CATALOG non-reserved non-reserved USER_DEFINED_TYPE_CODE non-reserved USER_DEFINED_TYPE_NAME non-reserved non-reserved USER_DEFINED_TYPE_SCHEMA non-reserved non-reserved USING reserved reserved reserved reserved VACUUM non-reserved VALID non-reserved VALIDATOR non-reserved VALUE reserved reserved reserved VALUES non-reserved reserved reserved reserved VARCHAR non-reserved (cannot be function or type) reserved reserved reserved VARIABLE reserved VARYING non-reserved reserved reserved reserved VAR_POP reserved VAR_SAMP reserved VERBOSE reserved (can be function) VIEW non-reserved non-reserved reserved reserved VOLATILE non-reserved WHEN reserved reserved reserved reserved WHENEVER reserved reserved reserved WHERE reserved reserved reserved reserved WIDTH_BUCKET reserved WINDOW reserved WITH non-reserved reserved reserved reserved WITHIN reserved WITHOUT non-reserved reserved reserved WORK non-reserved non-reserved reserved reserved WRITE non-reserved non-reserved reserved reserved YEAR non-reserved reserved reserved ZONE non-reserved non-reserved reserved reserved