diff --git a/src/sql/parser/ob_fast_parser.cpp b/src/sql/parser/ob_fast_parser.cpp
index cac77df03..7368fb77a 100644
--- a/src/sql/parser/ob_fast_parser.cpp
+++ b/src/sql/parser/ob_fast_parser.cpp
@@ -2654,6 +2654,10 @@ int ObFastParserMysql::process_identifier(bool is_number_begin)
       int64_t next_idf_pos = raw_sql_.cur_pos_;
       while (-1 != (next_idf_pos = is_identifier_flags(next_idf_pos))) {
         raw_sql_.cur_pos_ = next_idf_pos;
+        if ('.' == raw_sql_.char_at(raw_sql_.cur_pos_)) {
+          raw_sql_.scan();
+          next_idf_pos++;
+        }
       }
     }
   }
diff --git a/src/sql/parser/sql_parser_base.h b/src/sql/parser/sql_parser_base.h
index ed219780e..b2cd06484 100644
--- a/src/sql/parser/sql_parser_base.h
+++ b/src/sql/parser/sql_parser_base.h
@@ -240,6 +240,30 @@ do {
     setup_token_pos_info(node, word_start - 1, word_end - word_start + 1);  \
   } while (0)
 
+#define gen_expr_node(node, name, len, p, off)                                         \
+  do {                                                                                 \
+    char *src = (char*)parse_malloc(len + 1, p->malloc_pool_);                         \
+    check_malloc(src);                                                                 \
+    memmove(src, name, len);                                                           \
+    src[len] = '\0';                                                                   \
+    const NonReservedKeyword *word = NULL;                                             \
+    if (NULL == (word = mysql_non_reserved_keyword_lookup(src)))                       \
+    {                                                                                  \
+      if (p->is_not_utf8_connection_) {                                                \
+        node->str_value_ = parse_str_convert_utf8(p->charset_info_, src, p->malloc_pool_, &(node->str_len_), &(p->extra_errno_)); \
+        check_identifier_convert_result(p->extra_errno_);                              \
+      } else {                                                                         \
+        node->str_value_ = parse_strdup(src, p->malloc_pool_, &(node->str_len_));      \
+      }                                                                                \
+    } else {                                                                           \
+      node->str_value_ = parse_strndup(src, len, p->malloc_pool_);                     \
+      node->str_len_ = len;                                                            \
+    }                                                                                  \
+    check_malloc(node->str_value_);                                                    \
+    node->sql_str_off_ = off;                                                          \
+    setup_token_pos_info(node, off,  node->str_len_);                                  \
+  } while (0)
+
 //oracle下生成非保留关键字结点请使用该宏,区别于mysql的是做了大写的转换
 #define get_oracle_non_reserved_node(node, malloc_pool, expr_start, expr_end) \
   do {                                                                 \
diff --git a/src/sql/parser/sql_parser_mysql_mode.l b/src/sql/parser/sql_parser_mysql_mode.l
index ae764543d..5e15deb96 100644
--- a/src/sql/parser/sql_parser_mysql_mode.l
+++ b/src/sql/parser/sql_parser_mysql_mode.l
@@ -60,6 +60,7 @@ common_hint_begin (\/\*\+({space}*hint{space}+)?)
 c_cmt_begin      \/\*
 c_cmt_end        \*+\/
 comment          ({sql_comment})
+start_identifier        (([A-Za-z0-9$_]*[A-Za-z$_][A-Za-z0-9$_]*|{NOTASCII_GB_CHAR})+)
 identifier        (([A-Za-z0-9$_]|{NOTASCII_GB_CHAR})+)
 system_variable  (@@[A-Za-z_][A-Za-z0-9_]*)|(@@[`][`A-Za-z_][`A-Za-z_]*)
 user_variable    (@[A-Za-z0-9_\.$]*)|(@[`'\"][`'\"A-Za-z0-9_\.$/%]*)
@@ -1617,6 +1618,65 @@ BEGIN(in_c_comment);
   return USER_VARIABLE;
 }
 
+{start_identifier}"."{identifier}"."{identifier} {
+  ParseResult *result = (ParseResult *)yyextra;
+  check_value(yylval);
+  if (IS_FAST_PARAMETERIZE) {
+    REPUT_NEG_SIGN(result);
+    return ID_DOT_ID_DOT_ID;
+  } else {
+    ParseNode *node = NULL, *db_node = NULL, *tb_node = NULL, *col_node = NULL;
+    malloc_new_node(db_node, result->malloc_pool_, T_IDENT, 0);
+    malloc_new_node(tb_node, result->malloc_pool_, T_IDENT, 0);
+    malloc_new_node(col_node, result->malloc_pool_, T_IDENT, 0);
+
+    char *db_name = yytext;
+    char *tb_name = strstr(db_name, ".") + 1;
+    char *col_name = strstr(tb_name, ".") + 1;
+    size_t db_len = tb_name - db_name - 1;
+    size_t tb_len = col_name - tb_name - 1;
+    size_t col_len = strlen(col_name);
+
+    gen_expr_node(db_node, db_name, db_len, result, yylloc->first_column - 1);
+    gen_expr_node(tb_node, tb_name, tb_len, result, yylloc->first_column + db_len);
+    gen_expr_node(col_node, col_name, col_len, result, yylloc->first_column + db_len + tb_len + 1);
+    malloc_new_node(node, result->malloc_pool_, T_IDENT, 3);
+    node->children_[0] = db_node;
+    node->children_[1] = tb_node;
+    node->children_[2] = col_node;
+    node->str_value_ = parse_strdup(col_node->str_value_, result->malloc_pool_, &(node->str_len_));
+    yylval->node = node;
+    return ID_DOT_ID_DOT_ID;
+  }
+}
+
+{start_identifier}"."{identifier} {
+  ParseResult *result = (ParseResult *)yyextra;
+  check_value(yylval);
+  if (IS_FAST_PARAMETERIZE) {
+    REPUT_NEG_SIGN(result);
+    return ID_DOT_ID;
+  } else {
+    ParseNode *node = NULL, *tb_node = NULL, *col_node = NULL;
+    malloc_new_node(tb_node, result->malloc_pool_, T_IDENT, 0);
+    malloc_new_node(col_node, result->malloc_pool_, T_IDENT, 0);
+
+    char *tb_name = yytext;
+    char *col_name = strstr(tb_name, ".") + 1;
+    size_t tb_len = col_name - tb_name - 1;
+    size_t col_len = strlen(col_name);
+
+    gen_expr_node(tb_node, tb_name, tb_len, result, yylloc->first_column - 1);
+    gen_expr_node(col_node, col_name, col_len, result, yylloc->first_column + tb_len);
+    malloc_new_node(node, result->malloc_pool_, T_IDENT, 2);
+    node->children_[0] = tb_node;
+    node->children_[1] = col_node;
+    node->str_value_ = parse_strdup(col_node->str_value_, result->malloc_pool_, &(node->str_len_));
+    yylval->node = node;
+    return ID_DOT_ID;
+  }
+}
+
 {identifier} {
   const NonReservedKeyword *word = NULL;
   if (IS_FAST_PARAMETERIZE) {
diff --git a/src/sql/parser/sql_parser_mysql_mode.y b/src/sql/parser/sql_parser_mysql_mode.y
index 6baf403dc..6d77750f9 100644
--- a/src/sql/parser/sql_parser_mysql_mode.y
+++ b/src/sql/parser/sql_parser_mysql_mode.y
@@ -72,7 +72,8 @@ extern void obsql_oracle_parse_fatal_error(int32_t errcode, yyscan_t yyscanner,
 %token <node> REMAP_TABLE_NAME
 %token <node> REMAP_DATABASE_TABLE_NAME
 %token <node> OUTLINE_DEFAULT_TOKEN/*use for outline parser to just filter hint of query_sql*/
-
+%token <node> ID_DOT_ID_DOT_ID
+%token <node> ID_DOT_ID
 /*empty_query::
 // (1) 对于只有空格或者;的查询语句需要报错：如："" 或者 "   " 或者 ";" 或者 " ;  " 都需要报错：err_msg:Query was empty  errno:1065
 // (2) 对于只含有注释或者空格或者;的查询语句则需要返回成功：如："#fadfadf " 或者"/**\/" 或者 "/**\/  ;" 返回成功
@@ -533,6 +534,7 @@ END_P SET_VAR DELIMITER
 %type <node> create_tenant_snapshot_stmt snapshot_name drop_tenant_snapshot_stmt clone_tenant_stmt clone_snapshot_option clone_tenant_option clone_tenant_option_list
 
 %type <node> ttl_definition ttl_expr ttl_unit
+%type <node> id_dot_id id_dot_id_dot_id
 %start sql_stmt
 %%
 ////////////////////////////////////////////////////////////////
@@ -870,6 +872,21 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, NULL, table_name, col_name);
   dup_node_string(col_name, $$, result->malloc_pool_);
 }
+| id_dot_id
+{
+  ParseNode* db_node = NULL;
+  ParseNode* tb_node = $1->children_[0];
+  ParseNode* col_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+  #ifndef SQL_PARSER_COMPILATION
+  if (3 == tb_node->str_len_) {
+    if (0 == strcasecmp("NEW", tb_node->str_value_) || 0 == strcasecmp("OLD", tb_node->str_value_)) {
+      lookup_pl_exec_symbol($$, result, @1.first_column, @1.last_column, true, false, false);
+    }
+  }
+  #endif
+}
 | relation_name '.' '*'
 {
   ParseNode *node = NULL;
@@ -898,6 +915,14 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, $1, table_name, col_name);
   dup_node_string(col_name, $$, result->malloc_pool_);
 }
+| id_dot_id_dot_id
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  ParseNode* col_node = $1->children_[2];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+}
 | relation_name '.' relation_name '.' '*'
 {
   ParseNode *node = NULL;
@@ -905,6 +930,15 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, $1, $3, node);
   $$->value_ = 0;
 }
+| id_dot_id '.' '*'
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  ParseNode* col_node = NULL;
+  malloc_terminal_node(col_node, result->malloc_pool_, T_STAR);
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  $$->value_ = 0;
+}
 | '.' relation_name '.' column_name
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, NULL, $2, $4);
@@ -926,6 +960,14 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, NULL, table_name, col_name);
   dup_node_string(col_name, $$, result->malloc_pool_);
 }
+| '.' id_dot_id
+{
+  ParseNode* db_node = NULL;
+  ParseNode* tb_node = $2->children_[0];
+  ParseNode* col_node = $2->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+}
 | FORCE
 {
   if (result->pl_parse_info_.is_pl_parse_) {
@@ -1680,6 +1722,28 @@ simple_expr collation %prec NEG
   }
   malloc_non_terminal_node($$, result->malloc_pool_, T_REMOTE_SEQUENCE, 4, $1, $3, $5, $6);
 }
+| id_dot_id USER_VARIABLE
+{
+  ParseNode* db_node = NULL;
+  ParseNode* tb_node = $1->children_[0];
+  ParseNode* col_node = $1->children_[1];
+  ParseNode *dblink_node = $2;
+  if (NULL != dblink_node) {
+    dblink_node->type_ = T_DBLINK_NAME;
+  }
+  malloc_non_terminal_node($$, result->malloc_pool_, T_REMOTE_SEQUENCE, 4, db_node, tb_node, col_node, $2);
+}
+| id_dot_id_dot_id USER_VARIABLE
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  ParseNode* col_node = $1->children_[2];
+  ParseNode *dblink_node = $2;
+  if (NULL != dblink_node) {
+    dblink_node->type_ = T_DBLINK_NAME;
+  }
+  malloc_non_terminal_node($$, result->malloc_pool_, T_REMOTE_SEQUENCE, 4, db_node, tb_node, col_node, dblink_node);
+}
 ;
 expr:
 expr AND expr %prec AND
@@ -2838,6 +2902,23 @@ MOD '(' expr ',' expr ')'
   malloc_non_terminal_node(udf_node, result->malloc_pool_, T_FUN_UDF, 4, $3, params, $1, NULL);
   store_pl_ref_object_symbol(udf_node, result, REF_FUNC);
 }
+| id_dot_id '(' opt_expr_as_list ')'
+{
+  ParseNode *params = NULL;
+  ParseNode *function = NULL;
+  ParseNode *sub_obj_access_ref = NULL;
+  ParseNode *udf_node = NULL;
+  ParseNode *id_node = $1;
+  if (NULL != $3)
+  {
+    merge_nodes(params, result, T_EXPR_LIST, $3);
+  }
+  malloc_non_terminal_node(function, result->malloc_pool_, T_FUN_SYS, 2, id_node->children_[1], params);
+  malloc_non_terminal_node(sub_obj_access_ref, result->malloc_pool_, T_OBJ_ACCESS_REF, 2, function, NULL);
+  malloc_non_terminal_node($$, result->malloc_pool_, T_OBJ_ACCESS_REF, 2, id_node->children_[0], sub_obj_access_ref);
+  malloc_non_terminal_node(udf_node, result->malloc_pool_, T_FUN_UDF, 4, $3, params, id_node->children_[0], NULL);
+  store_pl_ref_object_symbol(udf_node, result, REF_FUNC);
+}
 | sys_interval_func
 {
   $$ = $1;
@@ -5288,6 +5369,22 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, $1, $3, $5);
   dup_node_string($5, $$, result->malloc_pool_);
 }
+| id_dot_id
+{
+  ParseNode* db_node = NULL;
+  ParseNode* tb_node = $1->children_[0];
+  ParseNode* col_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+}
+| id_dot_id_dot_id
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  ParseNode* col_node = $1->children_[2];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+}
 ;
 
 column_definition_list:
@@ -9007,6 +9104,14 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, NULL, table_name, col_name);
   dup_node_string(col_name, $$, result->malloc_pool_);
 }
+| id_dot_id
+{
+  ParseNode* db_node = NULL;
+  ParseNode* tb_node = $1->children_[0];
+  ParseNode* col_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+}
 | relation_name '.' '*'
 {
   ParseNode *node = NULL;
@@ -9035,6 +9140,14 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, $1, table_name, col_name);
   dup_node_string(col_name, $$, result->malloc_pool_);
 }
+| id_dot_id_dot_id
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  ParseNode* col_node = $1->children_[2];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+}
 | relation_name '.' relation_name '.' '*'
 {
   ParseNode *node = NULL;
@@ -9042,6 +9155,15 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, $1, $3, node);
   $$->value_ = 0;
 }
+| id_dot_id '.' '*'
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  ParseNode* col_node = NULL;
+  malloc_terminal_node(col_node, result->malloc_pool_, T_STAR);
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  $$->value_ = 0;
+}
 | '.' relation_name '.' column_name
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, NULL, $2, $4);
@@ -9063,6 +9185,14 @@ column_name
   malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, NULL, table_name, col_name);
   dup_node_string(col_name, $$, result->malloc_pool_);
 }
+| '.' id_dot_id
+{
+  ParseNode* db_node = NULL;
+  ParseNode* tb_node = $2->children_[0];
+  ParseNode* col_node = $2->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+}
 ;
 
 
@@ -11812,6 +11942,14 @@ relation_name opt_with_star
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 2, $1, $3);
   dup_node_string($3, $$, result->malloc_pool_);
 }
+| id_dot_id opt_with_star
+{
+  (void)($2);
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 2, db_node, tb_node);
+  dup_node_string(tb_node, $$, result->malloc_pool_);
+}
 ;
 
 opt_with_star:
@@ -11843,6 +11981,13 @@ relation_name opt_dblink
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 2, $1, table_name);
   dup_node_string(table_name, $$, result->malloc_pool_);
 }
+| id_dot_id opt_dblink
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 3, db_node, tb_node, $2);
+  dup_node_string(tb_node, $$, result->malloc_pool_);
+}
 ;
 
 dot_relation_factor:
@@ -14490,6 +14635,12 @@ priv_level:
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_PRIV_LEVEL, 2, $1, $3);
 }
+| id_dot_id
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_PRIV_LEVEL, 2, db_node, tb_node);
+}
 ;
 
 grant_options:
@@ -17231,6 +17382,12 @@ recover_table_relation_name:
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 3, $1, $3, NULL);
 }
+| id_dot_id
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 3, db_node, tb_node, NULL);
+}
 | relation_name '.' '*'
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 3, $1, NULL, NULL);
@@ -17331,10 +17488,22 @@ relation_name REMAP_TABLE_NAME
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, NULL, NULL, $4);
 }
+| id_dot_id REMAP_TABLE_NAME
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node, tb_node, NULL, NULL, $2);
+}
 | relation_name '.' relation_name ':' relation_name
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, NULL, NULL, $5);
 }
+| id_dot_id ':' relation_name
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node, tb_node, NULL, NULL, $3);
+}
 | relation_name '.' relation_name REMAP_DATABASE_TABLE_NAME
 {
   if ($4->type_ != T_LINK_NODE || $4->num_child_ != 2) {
@@ -17344,10 +17513,29 @@ relation_name REMAP_TABLE_NAME
     malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, NULL, $4->children_[0], $4->children_[1]);
   }
 }
+| id_dot_id REMAP_DATABASE_TABLE_NAME
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  if ($2->type_ != T_LINK_NODE || $2->num_child_ != 2) {
+    yyerror(&@1, result, "get unexpected error in remap table");
+    YYABORT_PARSE_SQL_ERROR;
+  } else {
+    malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node, tb_node, NULL, $2->children_[0], $2->children_[1]);
+  }
+}
 | relation_name '.' relation_name ':' relation_name '.' relation_name
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, NULL, $5, $7);
 }
+| id_dot_id ':' id_dot_id
+{
+  ParseNode* db_node1 = $1->children_[0];
+  ParseNode* tb_node1 = $1->children_[1];
+  ParseNode* db_node2 = $3->children_[0];
+  ParseNode* tb_node2 = $3->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node1, tb_node1, NULL, db_node2, tb_node2);
+}
 | relation_name '.' '*' REMAP_TABLE_NAME '.' '*'
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, NULL, NULL, $4, NULL);
@@ -17360,10 +17548,22 @@ relation_name REMAP_TABLE_NAME
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, $4, NULL, $5);
 }
+| id_dot_id REMAP_TABLE_NAME REMAP_TABLE_NAME
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node, tb_node, $2, NULL, $3);
+}
 | relation_name '.' relation_name ':' relation_name ':' relation_name
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, $5, NULL, $7);
 }
+| id_dot_id ':' relation_name ':' relation_name
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node, tb_node, $3, NULL, $5);
+}
 | relation_name '.' relation_name REMAP_TABLE_NAME REMAP_DATABASE_TABLE_NAME
 {
   if ($5->type_ != T_LINK_NODE || $5->num_child_ != 2) {
@@ -17373,10 +17573,29 @@ relation_name REMAP_TABLE_NAME
     malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, $4, $5->children_[0], $5->children_[1]);
   }
 }
+| id_dot_id REMAP_TABLE_NAME REMAP_DATABASE_TABLE_NAME
+{
+  ParseNode* db_node = $1->children_[0];
+  ParseNode* tb_node = $1->children_[1];
+  if ($3->type_ != T_LINK_NODE || $3->num_child_ != 2) {
+    yyerror(&@1, result, "get unexpected error in remap table");
+    YYABORT_PARSE_SQL_ERROR;
+  } else {
+    malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node, tb_node, $2, $3->children_[0], $3->children_[1]);
+  }
+}
 | relation_name '.' relation_name ':' relation_name ':' relation_name '.' relation_name
 {
   malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, $1, $3, $5, $7, $9);
 }
+| id_dot_id ':' relation_name ':' id_dot_id
+{
+  ParseNode* db_node1 = $1->children_[0];
+  ParseNode* tb_node1 = $1->children_[1];
+  ParseNode* db_node2 = $5->children_[0];
+  ParseNode* tb_node2 = $5->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_RELATION_FACTOR, 5, db_node1, tb_node1, $3, db_node2, tb_node2);
+}
 ;
 
 table_relation_name:
@@ -18601,6 +18820,21 @@ new_or_old_column_ref:
   lookup_pl_exec_symbol($$, result, @1.first_column, @3.last_column, true, false, false);
 #endif
 }
+| id_dot_id
+{
+  if (!result->is_for_trigger_) {
+    yyerror(&@1, result, "");
+    YYERROR;
+  }
+  ParseNode* db_node = NULL;
+  ParseNode* tb_node = $1->children_[0];
+  ParseNode* col_node = $1->children_[1];
+  malloc_non_terminal_node($$, result->malloc_pool_, T_COLUMN_REF, 3, db_node, tb_node, col_node);
+  dup_node_string(col_node, $$, result->malloc_pool_);
+#ifndef SQL_PARSER_COMPILATION
+  lookup_pl_exec_symbol($$, result, @1.first_column, @1.last_column, true, false, false);
+#endif
+}
 
 column_name:
 NAME_OB
@@ -18619,6 +18853,13 @@ NAME_OB { $$ = $1; }
 }
 ;
 
+id_dot_id:
+ID_DOT_ID { $$ = $1; }
+;
+id_dot_id_dot_id:
+ID_DOT_ID_DOT_ID { $$ = $1; }
+;
+
 function_name:
 NAME_OB
 {
diff --git a/tools/deploy/mysql_test/r/mysql/selectotherdb.result b/tools/deploy/mysql_test/r/mysql/selectotherdb.result
index 6ae8f5a64..9a15f3448 100644
--- a/tools/deploy/mysql_test/r/mysql/selectotherdb.result
+++ b/tools/deploy/mysql_test/r/mysql/selectotherdb.result
@@ -1,2 +1,2 @@
 SELECT name FROM master.dbo.sysdatabases WHERE status <> 512;
-ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near '.sysdatabases WHERE status <> 512' at line 1
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your OceanBase version for the right syntax to use near 'master.dbo.sysdatabases WHERE status <> 512' at line 1