JT_INNER
joinop(X) ::= COMMA. { X = JT_INNER; }
joinop(X) ::= JOIN. { X = JT_INNER; }
(jointype & (JT_INNER|JT_OUTER))==(JT_INNER|JT_OUTER) ||
jointype = JT_INNER;
jointype = JT_INNER;
{ "inner", 5, JT_INNER },
{ "cross", 5, JT_INNER },