Re: pg_upgrade Python version issue on openSUSE

Hi Tom,

> On 26. Sep, 2020, at 16:07, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> If you had plpythonu installed before, that's a plausible thing
> to do.  (There was discussion some time ago about making the
> python-2-to-3 transition less painful for users, but we failed
> to come to any consensus about how; so manual fixes like this
> are going to be needed for a lot of people.)

that's one of the things I very much don't like about Python. This version 2 and 3 gibberish has been going on for
yearsnow wherever it's used, be it packaging with operating systems or integrated into applications. 

> However, I don't understand how "drop extension plpythonu"
> worked for you, given your previous query showing that
> that extension wasn't installed.

that is exactly what I don't understand too. It should have shown up in the query, but it didn't. The PostgreSQL 12.4
softwarewas compiled exactly the same way, only without ICU support. The other configure options were the same. Other
thanthat, I didn't change anything in my build script. 

For your reference, below are the two configs:

PostgreSQL 12.4:

$ pg_config
BINDIR = /data/postgres/12.4/bin
DOCDIR = /data/postgres/12.4/share/doc
HTMLDIR = /data/postgres/12.4/share/doc
INCLUDEDIR = /data/postgres/12.4/include
PKGINCLUDEDIR = /data/postgres/12.4/include
INCLUDEDIR-SERVER = /data/postgres/12.4/include/server
LIBDIR = /data/postgres/12.4/lib64
PKGLIBDIR = /data/postgres/12.4/lib64
LOCALEDIR = /data/postgres/12.4/share/locale
MANDIR = /data/postgres/12.4/share/man
SHAREDIR = /data/postgres/12.4/share
SYSCONFDIR = /data/postgres/12.4/etc
PGXS = /data/postgres/12.4/lib64/pgxs/src/makefiles/pgxs.mk
CONFIGURE = '--prefix=/data/postgres/12.4' '--enable-nls' '--with-perl' '--with-python' '--with-openssl' '--with-ldap'
'--with-libxml''--with-tclconfig=/usr/lib64' 
CC = gcc
CPPFLAGS = -D_GNU_SOURCE -I/usr/include/libxml2
CFLAGS = -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels
-Wmissing-format-attribute-Wformat-security -fno-strict-aliasing -fwrapv -fexcess-precision=standard
-Wno-format-truncation-O2 
CFLAGS_SL = -fPIC
LDFLAGS = -Wl,--as-needed -Wl,-rpath,'/data/postgres/12.4/lib64',--enable-new-dtags
LDFLAGS_EX =
LDFLAGS_SL =
LIBS = -lpgcommon -lpgport -lpthread -lxml2 -lssl -lcrypto -lz -lreadline -lrt -lcrypt -ldl -lm
VERSION = PostgreSQL 12.4

PostgreSQL 13.0:

$ pg_config
BINDIR = /data/postgres/13.0/bin
DOCDIR = /data/postgres/13.0/share/doc
HTMLDIR = /data/postgres/13.0/share/doc
INCLUDEDIR = /data/postgres/13.0/include
PKGINCLUDEDIR = /data/postgres/13.0/include
INCLUDEDIR-SERVER = /data/postgres/13.0/include/server
LIBDIR = /data/postgres/13.0/lib64
PKGLIBDIR = /data/postgres/13.0/lib64
LOCALEDIR = /data/postgres/13.0/share/locale
MANDIR = /data/postgres/13.0/share/man
SHAREDIR = /data/postgres/13.0/share
SYSCONFDIR = /data/postgres/13.0/etc
PGXS = /data/postgres/13.0/lib64/pgxs/src/makefiles/pgxs.mk
CONFIGURE =  '--prefix=/data/postgres/13.0' '--enable-nls' '--with-icu' '--with-perl' '--with-python' '--with-openssl'
'--with-ldap''--with-libxml' '--with-tclconfig=/usr/lib64' 
CC = gcc
CPPFLAGS = -D_GNU_SOURCE -I/usr/include/libxml2
CFLAGS = -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels
-Wmissing-format-attribute-Wimplicit-fallthrough=3 -Wformat-security -fno-strict-aliasing -fwrapv
-fexcess-precision=standard-Wno-format-truncation -O2 
CFLAGS_SL = -fPIC
LDFLAGS = -Wl,--as-needed -Wl,-rpath,'/data/postgres/13.0/lib64',--enable-new-dtags
LDFLAGS_EX =
LDFLAGS_SL =
LIBS = -lpgcommon -lpgport -lpthread -lxml2 -lssl -lcrypto -lz -lreadline -lrt -ldl -lm
VERSION = PostgreSQL 13.0

Cheers,
Paul