在目前的WHERE條件中，針對where ((a > 0) and (c = 'hjd'))之間的邏輯表達(dá)式無法識別，參考o(jì)racle的語法文件，我修改了語法文件，語法已可以驗(yàn)證，但在遍歷語法樹時，TOKEN下面的子TOKEN內(nèi)容無法獲取，語法定義的內(nèi)容如下：

/*==================================================================//
//                                                                  //
//      Where Condition Begin                                       //
//                                                                  //
//==================================================================*/
where_condition
 : condition
        { #where_condition = #([WHERE_CONDITION, "where_condition"], #where_condition); }
    ;

condition
 :  logical_term ( ("or"^ | "或者"^) logical_term )*
 ;

logical_term
 : logical_factor ( ("and"^ | "并且"^) logical_factor )*
 ;

logical_factor
 : ( exp_simple compare_op exp_simple ) => (exp_simple compare_op exp_simple )
  {#logical_factor = #([COMPARE_OP, "comp_op"], #logical_factor);}
 |  ( exp_simple ( "in" | "在于" ) ) => exp_simple ( "in" | "在于" ) exp_set
  { #logical_factor = #([LOGICAL_CONTAIN, "logic_contain"], #logical_factor); }
 | ( exp_simple ( "not in" | "不在于" ) ) => exp_simple ( "not in" | "不在于" ) exp_set
  { #logical_factor = #([LOGICAL_CONTAIN, "logic_contain"], #logical_factor); }
 |  ( exp_simple ( "like" | "包含" ) ) => exp_simple ("like" | "包含" ) where_expression ( "escape" QUOTED_STRING )?
  { #logical_factor = #([LOGICAL_LIKE, "logic_like"], #logical_factor); }
 |  ( exp_simple ( "not like" | "不包含" ) ) => exp_simple ("not like" | "不包含" ) where_expression ( "escape" QUOTED_STRING )?
  { #logical_factor = #([LOGICAL_LIKE, "logic_like"], #logical_factor); }
 |  ( exp_simple ( "between"| "范圍" ) ) => exp_simple ( "between" | "范圍" ) exp_simple exp_simple
  { #logical_factor = #([LOGICAL_BETWEEN, "logic_between"], #logical_factor); }
 |  ( exp_simple ( "not between"| "不在范圍" ) ) => exp_simple ( "not between" | "不在范圍" ) exp_simple exp_simple
  { #logical_factor = #([LOGICAL_BETWEEN, "logic_between"], #logical_factor); }
 |  ( exp_simple ( "is null" | "為空" ) ) => exp_simple ( "is null" | "為空" )
  { #logical_factor = #([LOGICAL_NULL, "logic_null"], #logical_factor); }
 |  ( exp_simple ( "is not null" | "非空" ) ) => exp_simple ( "is not null" | "非空" )
  { #logical_factor = #([LOGICAL_NULL, "logic_null"], #logical_factor); }
 |  ( quantified_factor ) => quantified_factor
  { #logical_factor = #([LOGICAL_EXISTS, "logic_exists"], #logical_factor); }
 |  ( ( "not" | "非" ) condition ) => ( "not" | "非" ) condition
  { #logical_factor = #([COND_NOT, "cond_not"], #logical_factor); }
 |  ( LPAREN condition RPAREN )
  { #logical_factor = #([COND_PAREN, "cond_paren"], #logical_factor); }
    ;

quantified_factor
 : ( exp_simple compare_op ( "all" | "any" )? subquery ) => exp_simple compare_op ( "all" | "any" )? subquery
    |  ( ( "not" )? "exists" subquery ) => ( "not" )? "exists" subquery
    |  subquery
    ;

exp_simple
 :  where_expression
 ;

where_expression
 :  term ( ( PLUS^ | MINUS^ | "加"^ | "減"^) term )*
    ;

term
 :  factor ( ( MUL^ | DIVIDE^ | "乘"^ | "除"^) factor )*
    ;
 
multiply
 : MUL | "乘"
        { #multiply = #([MULTIPLY, "multiply"], #multiply); }
    ;

factor
 : ( sql_literal ) => sql_literal
 | ( ( PLUS | MINUS ) where_expression ) => ( PLUS | MINUS ) where_expression
 | ( function_name ( LPAREN where_expression ( COMMA where_expression )* RPAREN ) ) => function_name ( LPAREN where_expression ( COMMA where_expression )* RPAREN )
  { #factor = #([NORMAL_FUNCTION, "normal_function"], #factor); }
 |  ( aggregate_func_name LPAREN ( STAR | "all" | "distinct" )? (where_expression)? RPAREN ) => aggregate_func_name LPAREN ( STAR | "all" | "distinct" )? (where_expression)? RPAREN
        { #factor = #([GROUP_FUNCTION, "group_function"], #factor); }
 | ( LPAREN where_expression RPAREN ) => LPAREN where_expression RPAREN
  { #factor = #([EXPRESSION_PAREN, "expression_paren"], #factor); }
 ;

sql_literal
 : constant
 | field_name
 ;

where_expression_list
 : LPAREN where_expression ( COMMA where_expression )+ RPAREN
 ;

exp_set
 :  LPAREN constexpset RPAREN
 {#exp_set = #([SUBCONTAIN_OP, "subcontain_op"], #exp_set);}
// | subquery
 ;

constexpset
 : constant (COMMA^ constant)*
// {#constexpset = #([SUBCONTAIN_CONTENT, "subcontain_content"], #constexpset);}
 ;
/*==================================================================//
//                                                                 //
//      Where Condition End                                        //
//                                                                 //
//==================================================================*/