diff options
Diffstat (limited to 'activerecord/lib')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb index 1d439acb07..02a6da2f71 100644 --- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb @@ -344,13 +344,17 @@ module ActiveRecord def primary_keys(table_name) # :nodoc: select_values(<<-SQL.strip_heredoc, "SCHEMA") - SELECT a.attname FROM pg_index i - CROSS JOIN generate_subscripts(i.indkey, 1) k - JOIN pg_attribute a - ON a.attrelid = i.indrelid - AND a.attnum = i.indkey[k] - WHERE i.indrelid = #{quote(quote_table_name(table_name))}::regclass - AND i.indisprimary + SELECT a.attname + FROM ( + SELECT indrelid, indkey, generate_subscripts(indkey, 1) idx + FROM pg_index + WHERE indrelid = #{quote(quote_table_name(table_name))}::regclass + AND indisprimary + ) i + JOIN pg_attribute a + ON a.attrelid = i.indrelid + AND a.attnum = i.indkey[i.idx] + ORDER BY i.idx SQL end |