Question

我在运行以下命令时尝试连接数据库时得到了

psql newsdata.sql

这是整个输出

vagrant@vagrant:/vagrant$ psql -d news -f newsdata.sql
SET
SET
SET
SET
SET
SET
SET
SET
SET
psql:newsdata.sql:31: ERROR:  relation "articles" already exists
ALTER TABLE
psql:newsdata.sql:45: ERROR:  relation "articles_id_seq" already exists
ALTER TABLE
ALTER SEQUENCE
psql:newsdata.sql:65: ERROR:  relation "authors" already exists
ALTER TABLE
psql:newsdata.sql:79: ERROR:  relation "authors_id_seq" already exists
ALTER TABLE
ALTER SEQUENCE
psql:newsdata.sql:102: ERROR:  relation "log" already exists
ALTER TABLE
psql:newsdata.sql:116: ERROR:  relation "log_id_seq" already exists
ALTER TABLE
ALTER SEQUENCE
ALTER TABLE
ALTER TABLE
ALTER TABLE
psql:newsdata.sql:162: ERROR:  duplicate key value violates unique constraint "articles_pkey"
DETAIL:  Key (id)=(23) already exists.
CONTEXT:  COPY articles, line 1
 setval
--------
     30
(1 row)

psql:newsdata.sql:181: ERROR:  duplicate key value violates unique constraint "authors_pkey"
DETAIL:  Key (id)=(1) already exists.
CONTEXT:  COPY authors, line 1
 setval
--------
      4
(1 row)

psql:newsdata.sql:1677931: ERROR:  duplicate key value violates unique constraint "log_pkey"
DETAIL:  Key (id)=(1678923) already exists.
CONTEXT:  COPY log, line 1
 setval
---------
 3356657
(1 row)

psql:newsdata.sql:1677946: ERROR:  multiple primary keys for table "articles" are not allowed
psql:newsdata.sql:1677954: ERROR:  relation "articles_slug_key" already exists
psql:newsdata.sql:1677962: ERROR:  multiple primary keys for table "authors" are not allowed
psql:newsdata.sql:1677970: ERROR:  multiple primary keys for table "log" are not allowed
psql:newsdata.sql:1677978: ERROR:  constraint "articles_author_fkey" for relation "articles" already exists

我只是不明白什么是双重密钥，所以我可以修复它，请您为这个问题提供详细的答案？即使只是检查链接，也会有很大帮助。

Answer 1

详细信息：密钥（id）=（23）已经存在。详细信息：密钥（id）=（1）已经存在。

脚本试图插入id = 23或id = 1，但这些值已在表中。

因此违反了唯一约束，并且每个元组都没有唯一的ID。

Answer 2

解决了。问题是因为我之前运行过此命令，所以现在我尝试了psql -d news并成功了。输出显示关系表

162：错误：当我尝试运行命令时，重复的键值违反了唯一约束“ articles_pkey”：psql newsdata.sql

2 个答案: