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-rw-r--r--lib/sqlalchemy/dialects/postgresql/base.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/sqlalchemy/dialects/postgresql/base.py b/lib/sqlalchemy/dialects/postgresql/base.py
index 5c88ee023..e1dc4af71 100644
--- a/lib/sqlalchemy/dialects/postgresql/base.py
+++ b/lib/sqlalchemy/dialects/postgresql/base.py
@@ -1963,11 +1963,14 @@ class PGDialect(default.DefaultDialect):
table_oid = self.get_table_oid(connection, table_name, schema,
info_cache=kw.get('info_cache'))
+ # cast indkey as varchar since it's an int2vector,
+ # returned as a list by some drivers such as pypostgresql
+
IDX_SQL = """
SELECT
i.relname as relname,
ix.indisunique, ix.indexprs, ix.indpred,
- a.attname, a.attnum, ix.indkey
+ a.attname, a.attnum, ix.indkey::varchar
FROM
pg_class t
join pg_index ix on t.oid = ix.indrelid