Merge pull request #210 from mabel-dev/FIX/#169

FIX/#169
mabel-dev · Jun 18, 2022 · 2ecf32a · 2ecf32a
2 parents 0f5e7f5 + 66a976f
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diff --git a/docs/Release Notes/Change Log.md b/docs/Release Notes/Change Log.md
@@ -31,6 +31,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [[#199](https://github.com/mabel-dev/opteryx/issues/199)] `SHOW EXTENDED COLUMNS` blows memory allocations on large tables
  ([@joocer](https://github.com/joocer]))
 
+**Fixed**
+
+- [[#169](https://github.com/mabel-dev/opteryx/issues/169)] Selection nodes in `EXPLAIN` have nested parentheses. ([@joocer](https://github.com/joocer]))
+
 ### [0.0.2] - 2022-06-03
 
 **Added**

diff --git a/opteryx/engine/planner/operations/selection_node.py b/opteryx/engine/planner/operations/selection_node.py
@@ -242,6 +242,8 @@ def _inner_config(predicate):
                     return f"{predicate[0]}"
                 return "(" + " ".join(_inner_config(p) for p in predicate) + ")"
             if isinstance(predicate, list):
+                if len(predicate) == 1:
+                    return _inner_config(predicate[0])
                 return "[" + ",".join(_inner_config(p) for p in predicate) + "]"
             return f"{predicate}"