postgresql - 已安装postgis但无法创建扩展: ERROR: could not open extension control file ~/postgis.控件": No such file or directory

Question

我正在使用 ubuntu 18.0.4 并且我有一个 postgresql 数据库。显然我已经安装了postgresql。我也已经安装了postgis:

sudo apt install postgis postgresql-11-postgis-2.5

通过使用这个命令:

dpkg -l | grep postgresq

它返回:

ii  pgdg-keyring                          2018.2                                          
all          keyring for apt.postgresql.org
ii  postgresql                            12+210.pgdg18.04+1                              
all          object-relational SQL database (supported version)
ii  postgresql-11                         11.6-1.pgdg18.04+1                              
amd64        object-relational SQL database, version 11 server
ii  postgresql-11-postgis-2.5             2.5.3+dfsg-2.pgdg18.04+1                        
amd64        Geographic objects support for PostgreSQL 11
ii  postgresql-11-postgis-2.5-scripts     2.5.3+dfsg-2.pgdg18.04+1                        
all          Geographic objects support for PostgreSQL 11 -- SQL scripts
ii  postgresql-12                         12.1-1.pgdg18.04+1                              
amd64        object-relational SQL database, version 12 server
ii  postgresql-client-11                  11.6-1.pgdg18.04+1                              
amd64        front-end programs for PostgreSQL 11
ii  postgresql-client-12                  12.1-1.pgdg18.04+1                              
amd64        front-end programs for PostgreSQL 12
ii  postgresql-client-common              210.pgdg18.04+1                                 
all          manager for multiple PostgreSQL client versions
ii  postgresql-common                     210.pgdg18.04+1                                 
all          PostgreSQL database-cluster manager
ii  postgresql-contrib                    12+210.pgdg18.04+1                              
all          additional facilities for PostgreSQL (supported version

并使用此命令:

dpkg -l | grep postgis

它返回:

ii  postgis                               3.0.0+dfsg-2~exp1.pgdg18.04+1                   
amd64        Geographic objects support for PostgreSQL
ii  postgresql-11-postgis-2.5             2.5.3+dfsg-2.pgdg18.04+1                        
amd64        Geographic objects support for PostgreSQL 11
ii  postgresql-11-postgis-2.5-scripts     2.5.3+dfsg-2.pgdg18.04+1                        
all          Geographic objects support for PostgreSQL 11 -- SQL scripts

但是当我尝试创建扩展时:

CREATE EXTENSION postgis;

它引发了这个错误:

ERROR: could not open extension control file >"/usr/share/postgresql/12/extension/postgis.control": No such file or directory

为什么我在安装完所有东西后无法创建此扩展程序？

Answer 1

您为 PostgreSQL v11 安装安装了 PostGIS，但是当您尝试创建扩展时，您已连接到 v12 数据库。

您必须连接到 v11 数据库或为 v12 安装安装 PostGIS。