def p_expComp_unario_1(t):
"""
expComp : datatype R_ISNULL
| datatype R_NOTNULL
"""
t[0] = expression.UnaryRelationalOperation(t[1], t[2], t[1].row,
t[1].column)
repGrammar.append(t.slice)
def p_expComp_unario_3(t):
"""
expComp : datatype R_IS R_NOT R_NULL
| datatype R_IS R_NOT R_TRUE
| datatype R_IS R_NOT R_FALSE
| datatype R_IS R_NOT R_UNKNOWN
"""
t[0] = expression.UnaryRelationalOperation(t[1], t[2] + t[3] + t[4],
t[1].row, t[1].column)
repGrammar.append(t.slice)
