1 files changed, 0 insertions, 161 deletions

diff --git a/src/backend/optimizer/util/var.c b/src/backend/optimizer/util/var.c
index 81332ff1cd1..1d88a778203 100644
--- a/src/backend/optimizer/util/var.c
+++ b/src/backend/optimizer/util/var.c
@@ -54,12 +54,6 @@ typedef struct
 
 typedef struct
 {
-	int			min_varlevel;
-	int			sublevels_up;
-} find_minimum_var_level_context;
-
-typedef struct
-{
 	List	   *varlist;
 	PVCAggregateBehavior aggbehavior;
 	PVCPlaceHolderBehavior phbehavior;
@@ -81,8 +75,6 @@ static bool contain_var_clause_walker(Node *node, void *context);
 static bool contain_vars_of_level_walker(Node *node, int *sublevels_up);
 static bool locate_var_of_level_walker(Node *node,
 						   locate_var_of_level_context *context);
-static bool find_minimum_var_level_walker(Node *node,
-							  find_minimum_var_level_context *context);
 static bool pull_var_clause_walker(Node *node,
 					   pull_var_clause_context *context);
 static Node *flatten_join_alias_vars_mutator(Node *node,
@@ -489,159 +481,6 @@ locate_var_of_level_walker(Node *node,
 
 
 /*
- * find_minimum_var_level
- *	  Recursively scan a clause to find the lowest variable level it
- *	  contains --- for example, zero is returned if there are any local
- *	  variables, one if there are no local variables but there are
- *	  one-level-up outer references, etc.  Subqueries are scanned to see
- *	  if they possess relevant outer references.  (But any local variables
- *	  within subqueries are not relevant.)
- *
- *	  -1 is returned if the clause has no variables at all.
- *
- * Will recurse into sublinks.	Also, may be invoked directly on a Query.
- */
-int
-find_minimum_var_level(Node *node)
-{
-	find_minimum_var_level_context context;
-
-	context.min_varlevel = -1;	/* signifies nothing found yet */
-	context.sublevels_up = 0;
-
-	(void) query_or_expression_tree_walker(node,
-										   find_minimum_var_level_walker,
-										   (void *) &context,
-										   0);
-
-	return context.min_varlevel;
-}
-
-static bool
-find_minimum_var_level_walker(Node *node,
-							  find_minimum_var_level_context *context)
-{
-	if (node == NULL)
-		return false;
-	if (IsA(node, Var))
-	{
-		int			varlevelsup = ((Var *) node)->varlevelsup;
-
-		/* convert levelsup to frame of reference of original query */
-		varlevelsup -= context->sublevels_up;
-		/* ignore local vars of subqueries */
-		if (varlevelsup >= 0)
-		{
-			if (context->min_varlevel < 0 ||
-				context->min_varlevel > varlevelsup)
-			{
-				context->min_varlevel = varlevelsup;
-
-				/*
-				 * As soon as we find a local variable, we can abort the tree
-				 * traversal, since min_varlevel is then certainly 0.
-				 */
-				if (varlevelsup == 0)
-					return true;
-			}
-		}
-	}
-	if (IsA(node, CurrentOfExpr))
-	{
-		int			varlevelsup = 0;
-
-		/* convert levelsup to frame of reference of original query */
-		varlevelsup -= context->sublevels_up;
-		/* ignore local vars of subqueries */
-		if (varlevelsup >= 0)
-		{
-			if (context->min_varlevel < 0 ||
-				context->min_varlevel > varlevelsup)
-			{
-				context->min_varlevel = varlevelsup;
-
-				/*
-				 * As soon as we find a local variable, we can abort the tree
-				 * traversal, since min_varlevel is then certainly 0.
-				 */
-				if (varlevelsup == 0)
-					return true;
-			}
-		}
-	}
-
-	/*
-	 * An Aggref must be treated like a Var of its level.  Normally we'd get
-	 * the same result from looking at the Vars in the aggregate's argument,
-	 * but this fails in the case of a Var-less aggregate call (COUNT(*)).
-	 */
-	if (IsA(node, Aggref))
-	{
-		int			agglevelsup = ((Aggref *) node)->agglevelsup;
-
-		/* convert levelsup to frame of reference of original query */
-		agglevelsup -= context->sublevels_up;
-		/* ignore local aggs of subqueries */
-		if (agglevelsup >= 0)
-		{
-			if (context->min_varlevel < 0 ||
-				context->min_varlevel > agglevelsup)
-			{
-				context->min_varlevel = agglevelsup;
-
-				/*
-				 * As soon as we find a local aggregate, we can abort the tree
-				 * traversal, since min_varlevel is then certainly 0.
-				 */
-				if (agglevelsup == 0)
-					return true;
-			}
-		}
-	}
-	/* Likewise, make sure PlaceHolderVar is treated correctly */
-	if (IsA(node, PlaceHolderVar))
-	{
-		int			phlevelsup = ((PlaceHolderVar *) node)->phlevelsup;
-
-		/* convert levelsup to frame of reference of original query */
-		phlevelsup -= context->sublevels_up;
-		/* ignore local vars of subqueries */
-		if (phlevelsup >= 0)
-		{
-			if (context->min_varlevel < 0 ||
-				context->min_varlevel > phlevelsup)
-			{
-				context->min_varlevel = phlevelsup;
-
-				/*
-				 * As soon as we find a local variable, we can abort the tree
-				 * traversal, since min_varlevel is then certainly 0.
-				 */
-				if (phlevelsup == 0)
-					return true;
-			}
-		}
-	}
-	if (IsA(node, Query))
-	{
-		/* Recurse into subselects */
-		bool		result;
-
-		context->sublevels_up++;
-		result = query_tree_walker((Query *) node,
-								   find_minimum_var_level_walker,
-								   (void *) context,
-								   0);
-		context->sublevels_up--;
-		return result;
-	}
-	return expression_tree_walker(node,
-								  find_minimum_var_level_walker,
-								  (void *) context);
-}
-
-
-/*
  * pull_var_clause
  *	  Recursively pulls all Var nodes from an expression clause.
  *