EQ = '='
LT = '<'
LE = '<='
GT = '>'
GE = '>='
NE = '<>'
IN = 'IN'
IS = 'IS'
EXP = '^'
LIKE = 'LIKE'
ILIKE = 'ILIKE'
SIMILAR_TO = 'SIMILAR TO'
BETWEEN = 'BETWEEN'
UNIQUE = 'UNIQUE'
ADD = '+'
SUB = '-'
MUL = '*'
DIV = '/'
XOR = '#'
AND = 'AND'
OR = 'OR'
REGEXP = 'REGEXP'
CONCAT = '||'
EXISTS = 'EXISTS'
NOT = 'NOT'
NULL = 'NULL'
DISTINCT = 'DISTINCT'
ON = 'ON'
FROM = 'FROM'
NULLIF = 'NULLIF'
OVERLAPS = 'OVERLAPS'
MAX = 'MAX'
DESC = 'DESC'
ASC = 'ASC'
USING = 'USING'
