songololo edited a comment on issue #84:
URL: https://github.com/apache/incubator-age/issues/84#issuecomment-857497693
If I build a docker image from the main branch and run the following::
```
SELECT *
FROM ag_catalog.drop_graph('threeds', True);
SELECT *
FROM ag_catalog.create_graph('threeds');
SELECT *
FROM ag_catalog.cypher('threeds', $$
CREATE (:begin {name : 'John'})-[:edge1 {name: '1'}]->(:middle)-[:edge1
{name: '2'}]->(:end)
$$) AS (a ag_catalog.agtype);
SELECT *
FROM ag_catalog.cypher('threeds', $$
MATCH (n:begin {name: 'John'})
WHERE n.name = 'John'
RETURN n
$$) as (v ag_catalog.agtype);
```
Then I'm encountering:
```
ERROR: operator is not unique: ag_catalog.agtype = ag_catalog.agtype
Hint: Could not choose a best candidate operator. You might need to add
explicit type casts.
```
This is my Dockerfile:
```
FROM postgis/postgis:11-3.1-alpine
# RUN apk add --no-cache postgresql-dev=11.10-r0
# postgresql-plpython2=11.10-r0
--repository=http://dl-cdn.alpinelinux.org/alpine/v3.9/main
RUN apk add --no-cache \
bison=3.6.2-r0 \
flex=2.6.4-r2 \
g++=9.3.0-r2 \
--repository=http://dl-cdn.alpinelinux.org/alpine/v3.12/main
RUN apk add --no-cache \
clang \
flex \
git \
llvm \
make
RUN git clone --depth 1 https://github.com/apache/incubator-age /age
RUN cd /age && make install
RUN ln -s /usr/lib/postgresql/plpython2.so
/usr/local/lib/postgresql/plpython2.so \
&& ln -s /usr/share/postgresql/extension/plpython2u.control
/usr/local/share/postgresql/extension/plpythonu.control \
&& ln -s /usr/share/postgresql/extension/plpython2u--1.0.sql
/usr/local/share/postgresql/extension/plpythonu--1.0.sql \
&& ln -s /usr/share/postgresql/extension/plpython2u--unpackaged--1.0.sql
/usr/local/share/postgresql/extension/plpythonu--unpackaged--1.0.sql
```
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