yangzhg opened a new issue #4176:
URL: https://github.com/apache/incubator-doris/issues/4176
For now our grammar file `fe/fe-core/src/main/cup/sql_parser.cup` has many
reduce conflicts, we should remove those conflicts
```
[WARNING]
/home/disk6/yang/workspace/baidu/bdg/doris/core/fe/fe-core/src/main/cup/sql_parser.cup
[0:0]: *** Shift/Reduce conflict found in state #1141
between opt_with_label ::= (*)
and opt_with_label ::= (*) KW_WITH KW_LABEL ident
under symbol KW_WITH
Resolved in favor of shifting.
[WARNING]
/home/disk6/yang/workspace/baidu/bdg/doris/core/fe/fe-core/src/main/cup/sql_parser.cup
[0:0]: *** Shift/Reduce conflict found in state #919
between opt_field_term ::= (*)
and opt_field_term ::= (*) KW_COLUMNS KW_TERMINATED KW_BY
STRING_LITERAL
under symbol KW_COLUMNS
Resolved in favor of shifting.
[WARNING]
/home/disk6/yang/workspace/baidu/bdg/doris/core/fe/fe-core/src/main/cup/sql_parser.cup
[0:0]: *** Shift/Reduce conflict found in state #209
between keyword ::= KW_DATE (*)
and non_pred_expr ::= KW_DATE (*) STRING_LITERAL
under symbol STRING_LITERAL
Resolved in favor of shifting.
[WARNING]
/home/disk6/yang/workspace/baidu/bdg/doris/core/fe/fe-core/src/main/cup/sql_parser.cup
[0:0]: *** Shift/Reduce conflict found in state #860
between opt_common_hints ::= (*)
and opt_common_hints ::= (*) LBRACKET ident_list RBRACKET
under symbol LBRACKET
Resolved in favor of shifting.
[WARNING]
/home/disk6/yang/workspace/baidu/bdg/doris/core/fe/fe-core/src/main/cup/sql_parser.cup
[0:0]: *** Shift/Reduce conflict found in state #202
between keyword ::= KW_TIMESTAMP (*)
and non_pred_expr ::= KW_TIMESTAMP (*) STRING_LITERAL
under symbol STRING_LITERAL
Resolved in favor of shifting.
[WARNING]
/home/disk6/yang/workspace/baidu/bdg/doris/core/fe/fe-core/src/main/cup/sql_parser.cup
[0:0]: *** Shift/Reduce conflict found in state #399
between keyword ::= time_unit (*)
and timestamp_arithmetic_expr ::= function_name LPAREN time_unit (*)
COMMA expr COMMA expr RPAREN
under symbol COMMA
Resolved in favor of shifting.
```
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