Ok - discovered the solution in pgsql-php, repeated below for reference:
---------------------------------------- From: "Peter De Muer (Work)" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Subject: Re: 7.3.1 update gives PHP libpq.so.2 problem Date: Tue, 4 Feb 2003 14:06:04 +0100 try making a soft link libpq.so.2 to the libpq.so.3 file that comes with PHP 7.3.1. regards, pt3r ------------------------------------------- End of quoted message So (for me) its a case of: cd /usr/lib ln -s libpq.so.3 libpq.so.2 ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match