我想删除AgensGraph上的属性索引。
agens=# create vlabel v;
CREATE VLABEL
agens=# create elabel e;
CREATE ELABEL
agens=# create property index on v ( id );
CREATE PROPERTY INDEX
agens=# create property index on e ( id );
CREATE PROPERTY INDEX
agens=# drop property index on v ( id );
ERROR: syntax error at or ne
从"“下载AgensGraph之后。
配置和安装完成后,我尝试连接AgensGraph。
它失败了,如下所示:
agens: could not connect to server: No such file or directory
Is the server running locally and accepting
connections on Unix domain socket "/tmp/.s.PGSQL.5432"?
如何在Mac上启动AgensGraph服务器?
AgensGraph无法启动。
当AgensGraph在同一台服务器上安装了多个实例时,某些AgensGraph无法启动。
$ ag_ctl start
ag_ctl: another server might be running; trying to start server anyway
server starting
有关于它的配置参数吗?
我想用cypher在GraphDBes中测试简单的图形分析性能。
我引用了,并在Neo4j、Agensgraph、SAP HANA和Redis中重现了该示例。
但是cypher查询(见下文)不能在Agensgraph和SAP HANA中操作。
MATCH (p1:Person {name:'Michael Sherman'})-[r1:RATED]->(m:Movie)<-[r2:RATED]-(p2:Person {name:'Michael Hunger'}) RETURN m.name AS Movie, r1.rating AS `M. Sh
我想改变顶点的vlabel。 agens=# create (:v1{id:1})-[:e1{id:3}]->(:v1{id:2});
GRAPH WRITE (INSERT VERTEX 2, INSERT EDGE 1)
agens=# match (n:v1{id:1}) set n:v2 remove n:v1;
ERROR: syntax error at or near ":"
LINE 1: match (n:v1{id:1}) set n:v2 remove n:v1;
^ 但是,上面有一
我想在PostgSQL上在CentOS上创建一个数据库集群。
当我输入命令'initdb‘时,结果如下所示:
[root@cll agensgraph]# initdb
initdb: cannot be run as root
Please log in (using, e.g., "su") as the (unprivileged) user that will own the server process.
我想换一下边缘的标签。
agens=# create (:v1{id:1})-[:e1{id:3}]->(:v1{id:2});
GRAPH WRITE (INSERT VERTEX 2, INSERT EDGE 1)
agens=# match ()-[r1:e1{id:3}]->() set r1:v2 remove r1:v1;
ERROR: syntax error at or near ":"
LINE 1: match ()-[r1:e1{id:3}]->() set r1:v2 remove r1:v1;
我尝试将1,000,000行数据加载到AgensGraph中。它是带有假用户配置文件的简单数据,我将标签命名为" user“。
然而,弹出了错误语句,我相信这是因为"user“一词被保留为AgensGraph的保留字之一。当我将单词更改为"person“时,它创建的顶点没有任何问题。
agraph=# LOAD FROM vlabel_user AS user CREATE (a:user=row_to_json(user)::jsonb);
ERROR: syntax error at or near "user"
LINE 1: LOAD FROM
下面的代码段用于使用ModeShape向节点添加标签。我可以使用哪个查询字符串来使用QueryManager查询这个节点?似乎versionHistory端的节点无法使用QueryManager查询。
VersionHistory history = session.getWorkspace().getVersionManager()
.getVersionHistory(node.getPath());
history.addVersionLabel(version.getName(), "label", tru
我想在AgensGraph上使用正则表达式查找字符串。 agens=# create (:v1{value:'text'});
GRAPH WRITE (INSERT VERTEX 1, INSERT EDGE 0)
agens=# match (n:v1) where n.value similar to 't%' return n;
ERROR: syntax error at or near "similar"
LINE 1: match (n:v1) where n.value similar to 't%' retu
我希望你能帮我解决我遇到的问题。我有一个联系人表单,我得到了这样一个错误日志:
PHP Notice: Undefined index: Name in {path}/contactengine.php on line 6
PHP Notice: Undefined index: Email in {path}/contactengine.php on line 7
PHP Notice: Undefined index: Message in {path}/contactengine.php on line 8
我的代码和是:
<?php
$EmailFrom = "
我想使用SET子句向节点添加一个新属性。但是发生错误,查询不执行。
1)第一条命令和错误信息:
MATCH (j {name:'Jack'}) SET j.hobby = 'Playing the guitar';
ERROR: invalid input syntax for type json
LINE 1: match (j {name:'Jack'}) SET j.hobby = 'Playing the guitar';
^