问题
I switched my postgres version from 9.2.24 to 9.6 because I need jsonb compatibility along with other recent features. I am running a vm on centos 7.
I decided to wipe all existing instances of postgres (which are almost empty since it is staging) and then installed 9.6. However, once I enter the postgres shell I received the following error when I type psql:
psql: symbol lookup error: psql: undefined symbol: PQsetErrorContextVisibility
I assume I need to change the path that psql is looking for so that it connects properly but I am not sure where to point it.
Note: ls reveals 2 directories and 1 file in postgres bash 9.6 data and initdb.log.
回答1:
psql: symbol lookup error: psql: undefined symbol: PQsetErrorContextVisibility
That means your copy of psql is looking for a dynamic symbol in libpq.so which the version in your path does not have.
Do you have a custom compiled version of psql? And, if so, you'll have to build it against the newer libpq that 9.6 provides.
回答2:
Just faced this because of red hat SCL. I got away with the following.
ln -s /opt/rh/rh-postgresql96/root/usr/lib64/libpq.so.rh-postgresql96-5.9 /opt/rh/rh-postgresql96/root/usr/lib64/libpq.so.5
ln -s /opt/rh/rh-postgresql96/root/usr/lib64/libpq.so.5 /usr/lib/libpq.so.5
In wouldn't advise my worst enemy about using software coming from SCL repository in place of an external repo (see postgresql 96 on centos 7).
回答3:
Try
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:<your postgres lib directory>
For example
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib64/
(turning @vaotsun's comment into an answer)
来源：https://stackoverflow.com/questions/52303275/psql-symbol-lookup-error-psql-undefined-symbol-pqseterrorcontextvisibility