Hi Folks,
What does the ANTLR walker error message like the following mean?
no viable alt; token=[@-1,0:0='DOWN'
Would appreciate any general guidance/suggestions to zero in on the
errors of this nature.
Thanks,
Vasan
Input sql:
-----------
select (1) from table1
where 2 between 3 and 4;
Error Message:
--------------------
TDWalker1.g: node from after line 2:8 [start1, startStatement, dml,
query_term, query_expression, query, query_unit, where_clause,
condition_list, condition_subexpression, condition] Walker1: no viable
alt; token=[@-1,0:0='DOWN',<2>,0:-1] (decision=127 state 0)
decision=<<590:1: condition options {backtrack=true; } : ( ^(
comparison_operator ( condition_quantifier )? c1= condition c2=
condition ) | ^( BETWEEN expression ^( and_or_operator c1= condition c2=
condition ) ) | ^( condition_operator expression c1= condition ^( ESCAPE
escape_character ) ) | ^( condition_operator expression c1= condition )
| ^( condition_operator expression_list c1= condition ) | ^( NOT c1=
condition ) | ^( EXISTS expression ) | ^( IS_NOT_NULL expression ) | ^(
IS_NULL expression ) | ^( IS_NOT expression UNTIL_CHANGED ) | ^( IS
expression UNTIL_CHANGED ) | ^( IS_NOT expression UNTIL_CLOSED ) | ^( IS
expression UNTIL_CLOSED ) | expression | condition_list );>> context=......
However the following SQL, that just doesn't have the parenthesis around
1, works fine!!!
select (1) from table1
where 2 between 3 and 4;
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