<\/span><\/h2>\n\n\n\n\u5176\u4e2dpublic \u5173\u952e\u5b57\u521b\u5efa\u516c\u5171\u540c\u4e49\u8bcd\uff0c\u7528\u6237\u65e0\u9700\u6307\u5b9a\u5e93\u540d\u5c31\u53ef\u4ee5\u8bbf\u95ee\u3002\u5426\u5219\u9ed8\u8ba4\u521b\u5efa\u7684\u662f\u79c1\u6709\u540c\u4e49\u8bcd\uff0c\u53ea\u6709\u5728\u5f53\u524d\u6307\u5b9a\u5e93\u53ef\u7528\u3002<\/p>\n\n\n\n
create [public] synonym SYNONYM_NAME for DBNAME.OBJECT_NAME;<\/code><\/pre>\n\n\n\n<\/span>\u5927\u6570\u636e\u573a\u666f<\/span><\/h2>\n\n\n\n\u9664\u4e86\u4f20\u7edf\u7684\u540c\u4e49\u8bcd\u4f7f\u7528\u573a\u666f\uff08\u8fd9\u90e8\u5206\u8bf7\u81ea\u884c\u7f51\u7edc\u641c\u7d22\uff09\uff0c\u5bf9GBase 8a\u8fd9\u79cd\u5927\u6570\u636e\u5206\u6790\u573a\u666f\uff0c\u4e00\u822c\u4f1a\u6709\u975e\u5e38\u591a\u7684\u5bf9\u8c61\uff0c\u7279\u522b\u662f\u8868\uff0c\u4f1a\u6709\u51e0\u5341\u4e07\uff0c\u51e0\u767e\u4e07\u7684\u8868\u3002<\/p>\n\n\n\n
\u8fd9\u4e48\u591a\u7684\u5bf9\u8c61\uff0c\u5bf9\u64cd\u4f5c\u7cfb\u7edf\u7684\u6587\u4ef6\u7cfb\u7edf\u63d0\u51fa\u4e86\u538b\u529b\uff0c\u5728\u8bbf\u95ee\u4e00\u4e2a\u76ee\u5f55\u4e0b\u51e0\u767e\u4e07\u7684\u6587\u4ef6\uff0c\u4e5f\u975e\u5e38\u8017\u65f6\u4e14\u6d88\u8017IO\u8d44\u6e90\u3002<\/p>\n\n\n\n
\u901a\u8fc7\u540c\u4e49\u8bcd\uff0c\u53ef\u4ee5\u8003\u8651\u5c06\u5bf9\u8c61\uff0c\u5206\u7c7b\u5230\u4e0d\u540c\u7684\u652f\u6301\u5e93\u4e0b\uff0c\u6bd4\u5982\u6309\u6708\u5206\u5e93\u3002\u4f46\u5728\u4e3b\u5e93\uff0c\u7528\u540c\u4e49\u8bcd\uff0c\u8fd9\u6837\u53ef\u4ee5\u6781\u5927\u7684\u51cf\u5c11\u6bcf\u4e2a\u5e93\u4e0b\u6587\u4ef6\u6570\u91cf\uff0c\u51cf\u5c11\u78c1\u76d8IO\uff0c\u4ece\u800c\u63d0\u5347\u4e86\u7cfb\u7edf\u6027\u80fd\u3002<\/p>\n\n\n\n
\u6bd4\u5982\u89c6\u56fe\uff0c\u53ef\u4ee5\u5728\u5176\u5b83\u5e93\u5efa\u89c6\u56fe\uff0c\u7136\u540e\u5728\u4e3b\u5e93\u5efa\u540c\u4e49\u8bcd\u3002\u89c6\u56fe\u7684\u5143\u6570\u636e\uff0c\u53ef\u4ee5\u7528\u539f\u59cb\u5e93\uff0c\u4e5f\u53ef\u4ee5\u7528\u540c\u4e49\u8bcd\u7684\u5143\u6570\u636e\u8868\u3002<\/p>\n\n\n\n
<\/span>\u6837\u4f8b\u73af\u5883<\/span><\/h2>\n\n\n\n\u5982\u4e0b\u521b\u5efa\u4e863\u4e2a\u6570\u636e\u5e93\uff0c\u5176\u4e2ddbmain\u662f\u4e3b\u5e93\uff0cdb1\u662f\u6d4b\u8bd5\u5e931\uff0c db2\u662f\u6d4b\u8bd5\u5e932\u3002\u57282\u4e2a\u6d4b\u8bd5\u5e93\u5206\u522b\u5efa\u4e861\u4e2a\u8868\u3002<\/p>\n\n\n\n
[gbase@rh6-1 ~]$ gccli testdb\n\nGBase client 8.6.2.43-R30.124361. Copyright (c) 2004-2020, GBase. All Rights Reserved.\n\ngbase> create database db1;\nQuery OK, 1 row affected (Elapsed: 00:00:00.07)\n\ngbase> create database db2;\nQuery OK, 1 row affected (Elapsed: 00:00:00.04)\n\ngbase> create database dbmain;\nQuery OK, 1 row affected (Elapsed: 00:00:00.01)\n\ngbase> use db1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.00)\n\ngbase> create table db1_t1(id int);\nQuery OK, 0 rows affected (Elapsed: 00:00:00.36)\n\ngbase> insert into db1_t1 values(1),(2);\nQuery OK, 2 rows affected (Elapsed: 00:00:00.38)\nRecords: 2 Duplicates: 0 Warnings: 0\n\ngbase> use db2;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.22)\n\ngbase> create table db2_t1(id int);\nQuery OK, 0 rows affected (Elapsed: 00:00:00.49)\n\ngbase> insert into db2_t1 values(221),(222);\nQuery OK, 2 rows affected (Elapsed: 00:00:00.41)\nRecords: 2 Duplicates: 0 Warnings: 0\n<\/code><\/pre>\n\n\n\n<\/span>\u8868\u7684\u79c1\u6709\u540c\u4e49\u8bcd\u6837\u4f8b<\/span><\/h2>\n\n\n\n\u5728dbmain\u5206\u522b\u521b\u5efadb1\u548cdb2\u7684\u4e24\u4e2a\u540c\u4e49\u8bcd\u3002<\/p>\n\n\n\n
\u6ce8\u610f\uff1a\u540c\u4e49\u8bcd\u5e76\u4e0d\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u5b58\u5728\u3002<\/span><\/p>\n\n\n\ngbase> use dbmain;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\ngbase> create synonym db1_t1 for db1.db1_t1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.02)\n\ngbase> create synonym db2_t1 for db2.db2_t1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n<\/code><\/pre>\n\n\n\n\u6211\u4eec\u5bf9\u540c\u4e49\u8bcd\u7684\u8868\u53ef\u4ee5\u67e5\u8be2\uff0c\u53d8\u52a8\u6570\u636e\u7b49\u64cd\u4f5c\uff0c\u5c31\u5982\u540c\u672c\u5730\u8868\u4e00\u6837\u3002<\/p>\n\n\n\n
<\/span>\u8868\u79c1\u6709\u540c\u4e49\u8bcd\u67e5\u8be2<\/span><\/h3>\n\n\n\n\ngbase> select * from db1_t1;\n+------+\n| id |\n+------+\n| 1 |\n| 2 |\n+------+\n2 rows in set (Elapsed: 00:00:00.02)\n\ngbase> select * from db2_t1;\n+------+\n| id |\n+------+\n| 221 |\n| 222 |\n+------+\n2 rows in set (Elapsed: 00:00:00.01)\n<\/code><\/pre>\n\n\n\n<\/span>\u8868\u79c1\u6709\u540c\u4e49\u8bcdDML<\/span><\/h3>\n\n\n\n\ngbase> insert into db2_t1 values (2001),(2002);\nQuery OK, 2 rows affected (Elapsed: 00:00:00.26)\nRecords: 2 Duplicates: 0 Warnings: 0\n\ngbase> select * from db2_t1;\n+------+\n| id |\n+------+\n| 221 |\n| 222 |\n| 2001 |\n| 2002 |\n+------+\n4 rows in set (Elapsed: 00:00:00.01)\n\ngbase> update db2_t1 set id=id+1;\nQuery OK, 4 rows affected (Elapsed: 00:00:00.84)\nRows matched: 4 Changed: 4 Warnings: 0\n\ngbase> select * from db2_t1;\n+------+\n| id |\n+------+\n| 222 |\n| 223 |\n| 2002 |\n| 2003 |\n+------+\n4 rows in set (Elapsed: 00:00:00.00)\n\ngbase> delete db2_t1 where id>=2003;\nQuery OK, 1 row affected (Elapsed: 00:00:00.40)\n\ngbase> select * from db2_t1;\n+------+\n| id |\n+------+\n| 222 |\n| 223 |\n| 2002 |\n+------+\n3 rows in set (Elapsed: 00:00:00.01)\n\n\n<\/code><\/pre>\n\n\n\n<\/span>\u8868\u79c1\u6709\u540c\u4e49\u8bcdDDL<\/span><\/h3>\n\n\n\n\u5f53\u524d\u7248\u672c\uff0c\u4e0d\u652f\u6301\u5bf9\u540c\u4e49\u8bcd\u7684\u8868\u7ed3\u6784\u53d8\u52a8\u3002\u56e0\u4e3a\u5b83\u4e0d\u662f\u4e2a\u8868\u3002\u800c\u540c\u4e49\u8bcd\u53c8\u6ca1\u6709\u3010\u8868\u7ed3\u6784\u3011<\/p>\n\n\n\n
gbase> alter table db2_t1 add column(name varchar(100));\nERROR 1702 (HY000): gcluster table error: (GBA-02DD-0017) Unknown table 'dbmain.db2_t1'\n<\/code><\/pre>\n\n\n\n<\/span>\u8868\u5171\u6709\u540c\u4e49\u8bcd\u6837\u4f8b<\/span><\/h2>\n\n\n\n\u5171\u6709\u540c\u4e49\u8bcd\u521b\u5efa\u540e\uff0c\u4e0d\u9700\u8981\u4f7f\u7528\u5e93\u524d\u7f00\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\uff0c\u7b49\u540c\u4e8e\u3010\u5168\u5c40\u3011\u53ef\u7528\u3002<\/p>\n\n\n\n
gbase> create public synonym pub_db1_t1 for db1.db1_t1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\ngbase> select count(*) from pub_db1_t1;\n+----------+\n| count(*) |\n+----------+\n| 2 |\n+----------+\n1 row in set (Elapsed: 00:00:00.02)\n\ngbase> use db1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\ngbase> select count(*) from pub_db1_t1;\n+----------+\n| count(*) |\n+----------+\n| 2 |\n+----------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase> use db2;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\ngbase> select count(*) from pub_db1_t1;\n+----------+\n| count(*) |\n+----------+\n| 2 |\n+----------+\n1 row in set (Elapsed: 00:00:00.06)\n\ngbase> use dbmain;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\ngbase> select count(*) from pub_db1_t1;\n+----------+\n| count(*) |\n+----------+\n| 2 |\n+----------+\n1 row in set (Elapsed: 00:00:00.01)\n\ngbase> use gclusterdb;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.04)\n\ngbase> select count(*) from pub_db1_t1;\n+----------+\n| count(*) |\n+----------+\n| 2 |\n+----------+\n1 row in set (Elapsed: 00:00:00.00)\n\n\u8868\u516c\u6709\u540c\u4e49\u8bcd\u7684DML\/DDL \u64cd\u4f5c\u548c\u79c1\u6709\u540c\u4e49\u8bcd\u65e0\u533a\u522b\uff0c\u5c31\u4e0d\u591a\u5199\u4e86\u3002<\/code><\/pre>\n\n\n\n<\/span>\u89c6\u56fe\u7684\u540c\u4e49\u8bcd<\/span><\/h2>\n\n\n\n\u6211\u4eec\u5728db1\u521b\u5efa\u4e00\u4e2a\u89c6\u56fe\uff0c\u7136\u540e\u518ddbmain\u521b\u5efa\u4e00\u4e2a\u540c\u4e49\u8bcd\u3002<\/p>\n\n\n\n
gbase> use db1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\n\ngbase> create view v_t1 as select * from db1_t1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.07)\n\ngbase> select * from v_t1;\n+------+\n| id |\n+------+\n| 1 |\n| 2 |\n+------+\n2 rows in set (Elapsed: 00:00:00.00)\n\ngbase> use dbmain;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.00)\n\ngbase> create synonym v_t1 for db1.v_t1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\ngbase> select * from v_t1;\n+------+\n| id |\n+------+\n| 1 |\n| 2 |\n+------+\n2 rows in set (Elapsed: 00:00:00.01)\n<\/code><\/pre>\n\n\n\n\u5171\u6709\u89c6\u56fe\u7684DML\uff0c\u9075\u5faa\u89c6\u56fe\u662f\u5426\u53ef\u4ee5\u7684\u89c4\u5b9a\uff0c\u5f53\u524d\u7248\u672c\u4e0d\u652f\u6301\u89c6\u56fe\u7684insert\u3002DDL\u4e0d\u652f\u6301\u3002<\/p>\n\n\n\n
gbase> insert into v_t1 values(111),(112);\nERROR 1149 (42000): (GBA-02SC-1001) The query includes syntax that is not supported by the gcluster.\ngbase>\n<\/code><\/pre>\n\n\n\n<\/span>\u5176\u5b83\u540c\u4e49\u8bcd<\/span><\/h2>\n\n\n\n\u4efb\u4f55\u6570\u636e\u5e93\u7684\u5bf9\u8c61\uff0c\u90fd\u53ef\u4ee5\u521b\u5efa\u540c\u4e49\u8bcd\uff0c\u5305\u62ec\u540c\u4e49\u8bcd\u7684\u540c\u4e49\u8bcd\u3002<\/p>\n\n\n\n
gbase> create synonym v_v_t1 for dbmain.v_t1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.01)\n\ngbase> select * from v_v_t1;\n+------+\n| id |\n+------+\n| 1 |\n| 2 |\n+------+\n2 rows in set (Elapsed: 00:00:00.01)\n\n<\/code><\/pre>\n\n\n\n<\/span>\u67e5\u770b\u540c\u4e49\u8bcd<\/span><\/h2>\n\n\n\n<\/span>\u67e5\u770b\u5f53\u524d\u5e93\u53ef\u7528\u540c\u4e49\u8bcd<\/span><\/h3>\n\n\n\n\u80fd\u4f7f\u7528\u7684\u79c1\u6709\u540c\u4e49\u8bcd\u548c\u5171\u6709\u540c\u4e49\u8bcd<\/p>\n\n\n\n
gbase> select * from gbase.synonyms where owner=database() or owner=''\\G;\n*************************** 1. row ***************************\n owner: dbmain\nsynonym_name: db1_t1\nobject_owner: db1\n object_name: db1_t1\n db_link: NULL\n*************************** 2. row ***************************\n owner: dbmain\nsynonym_name: db2_t1\nobject_owner: db2\n object_name: db2_t1\n db_link: NULL\n*************************** 3. row ***************************\n owner: dbmain\nsynonym_name: v_t1\nobject_owner: db1\n object_name: v_t1\n db_link: NULL\n*************************** 4. row ***************************\n owner: dbmain\nsynonym_name: v_t_notexist\nobject_owner: db1\n object_name: v_t1_178291728712\n db_link: NULL\n*************************** 5. row ***************************\n owner:\nsynonym_name: v_t_notexist\nobject_owner: db1\n object_name: v_t1_178291728712\n db_link: NULL\n5 rows in set (Elapsed: 00:00:00.00)\n\n<\/code><\/pre>\n\n\n\n<\/span>\u67e5\u770b\u540c\u4e49\u8bcd\u7684\u521b\u5efa\u8bed\u6cd5<\/span><\/h3>\n\n\n\ngbase> show create synonym v_v_t1;\n+---------------+----------------------------------------------+\n| Synonym | Create synonym |\n+---------------+----------------------------------------------+\n| dbmain.v_v_t1 | CREATE SYNONYM dbmain.v_v_t1 FOR dbmain.v_t1 |\n+---------------+----------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase> show create synonym v_t1;\n+-------------+-----------------------------------------+\n| Synonym | Create synonym |\n+-------------+-----------------------------------------+\n| dbmain.v_t1 | CREATE SYNONYM dbmain.v_t1 FOR db1.v_t1 |\n+-------------+-----------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\n<\/code><\/pre>\n\n\n\n<\/span>\u63d0\u793a<\/span><\/h2>\n\n\n\n<\/span>\u540c\u4e49\u8bcd\u4e0d\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u5b58\u5728<\/span><\/h3>\n\n\n\n\u5229\u7528\u8fd9\u4e00\u70b9\uff0c\u53ef\u4ee5\u63d0\u524d\u521b\u5efa\u540c\u4e49\u8bcd\uff0c\u7b49\u771f\u662f\u5bf9\u8c61\u5b58\u5728\u540e\uff0c\u8be5\u540c\u4e49\u8bcd\u53ca\u65f6\u751f\u6548\u3002<\/p>\n\n\n\n
\ngbase> show create synonym v_t_notexist;\n+---------------------+--------------------------------------------------------------+\n| Synonym | Create synonym |\n+---------------------+--------------------------------------------------------------+\n| dbmain.v_t_notexist | CREATE SYNONYM dbmain.v_t_notexist FOR db1.v_t1_178291728712 |\n+---------------------+--------------------------------------------------------------+\n1 row in set (Elapsed: 00:00:00.00)\n\ngbase> select * from v_t_notexist;\nERROR 1146 (42S02): Table 'db1.v_t1_178291728712' doesn't exist\n\ngbase> create view db1.v_t1_178291728712 as select * from db1.db1_t1;\nQuery OK, 0 rows affected (Elapsed: 00:00:00.03)\n\ngbase> select * from v_t_notexist;\n+------+\n| id |\n+------+\n| 1 |\n| 2 |\n+------+\n2 rows in set (Elapsed: 00:00:00.00)\n\ngbase>\n<\/code><\/pre>\n\n\n\n<\/span>\u540c\u4e49\u8bcd\u4e0d\u80fd\u548c\u5bf9\u8c61\u91cd\u540d<\/span><\/h3>\n\n\n\n\u548c\u5bf9\u8c61\u4e00\u6837\uff0c\u4f5c\u7528\u57df\u5185\u4e0d\u80fd\u91cd\u590d\u3002\u4e0d\u80fd\u521b\u5efa\u548c\u8868\u540d\u91cd\u590d\u7684\u540c\u4e49\u8bcd\uff0c\u540c\u6837\u7684\uff0c\u5b9e\u4f53\u8868\u4e5f\u4e0d\u80fd\u548c\u540c\u4e49\u8bcd\u91cd\u540d\uff1b<\/p>\n\n\n\n
gbase> select * from v_t_notexist;\n+------+\n| id |\n+------+\n| 1 |\n| 2 |\n+------+\n2 rows in set (Elapsed: 00:00:00.01)\n\ngbase> create view v_t_notexist as select * from testdb.t1;\nERROR 1712 (HY000): gcluster view error: name 'dbmain.v_t_notexist' is already used by an existing synonym.\ngbase>\n<\/code><\/pre>\n\n\n\n<\/span>\u6743\u9650<\/span><\/h2>\n\n\n\npublic \u540c\u4e49\u8bcd\u5fc5\u987b\u6709\u7ba1\u7406\u5458\u6743\u9650\uff0c\u53ea\u6709\u5e93\u7ea7\u6743\u9650\u7684\u662f\u65e0\u6cd5\u521b\u5efa\u5168\u5c40\u540c\u4e49\u8bcd\u7684\u3002<\/p>\n\n\n\n
[gbase@rh6-1 ~]$ gccli -utestdb -ptestdb testdb\r\n\r\nGBase client 8.6.2.43-R35.508906e415d. Copyright (c) 2004-2022, GBase. All Righ\r\n\r\ngbase> create public synonym pub_sy_t1 for t1;\r\nERROR 1822 (HY000): CREATE command denied to user 'testdb'@'localhost' for public synonym 'pub_sy_t1'\r\ngbase>\r\n<\/code><\/pre>","protected":false},"excerpt":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u652f\u6301\u540c\u4e49\u8bcdsynonym\uff0c\u672c\u6587\u7528862Build43\u7248\u672c\u5bf9\u540c\u4e49\u8bcd\u529f\u80fd\u8fdb\u884c\u4e86\u9002\u7528\uff0c\u5e76\u5bf9\u9002\u7528\u573a\u666f\u8fdb\u884c\u5efa\u8bae\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2419","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/2419","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=2419"}],"version-history":[{"count":12,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/2419\/revisions"}],"predecessor-version":[{"id":10595,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/2419\/revisions\/10595"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=2419"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=2419"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=2419"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}