diff --git a/pkg/sql/logictest/testdata/logic_test/show_create_all_tables_builtin b/pkg/sql/logictest/testdata/logic_test/show_create_all_tables_builtin
index 8e4008670695..6aac274ec54e 100644
--- a/pkg/sql/logictest/testdata/logic_test/show_create_all_tables_builtin
+++ b/pkg/sql/logictest/testdata/logic_test/show_create_all_tables_builtin
@@ -412,3 +412,18 @@ CREATE TABLE sc2.t (
     rowid INT8 NOT VISIBLE NOT NULL DEFAULT unique_rowid(),
     CONSTRAINT t_pkey PRIMARY KEY (rowid ASC)
 );
+
+# Regression test for not closing the ValueGenerators when they are recreated
+# multiple times (#85418).
+statement ok
+CREATE DATABASE db_85418_1;
+USE db_85418_1;
+CREATE TABLE t_85418_1();
+CREATE TABLE t_85418_2();
+CREATE DATABASE db_85418_2;
+USE db_85418_2;
+CREATE TABLE t_85418_1();
+CREATE TABLE t_85418_2();
+CREATE TABLE dbs_85418(db STRING);
+INSERT INTO dbs_85418 VALUES ('db_85418_1'), ('db_85418_2');
+SELECT crdb_internal.show_create_all_tables(db) FROM dbs_85418;
diff --git a/pkg/sql/rowexec/project_set.go b/pkg/sql/rowexec/project_set.go
index 12c9b5b36d6f..9b435d6fdf41 100644
--- a/pkg/sql/rowexec/project_set.go
+++ b/pkg/sql/rowexec/project_set.go
@@ -156,6 +156,13 @@ func (ps *projectSetProcessor) nextInputRow() (
 		if fn := ps.funcs[i]; fn != nil {
 			// A set-generating function. Prepare its ValueGenerator.
 
+			// First, make sure to close its ValueGenerator from the previous
+			// input row (if it exists).
+			if ps.gens[i] != nil {
+				ps.gens[i].Close(ps.Ctx)
+				ps.gens[i] = nil
+			}
+
 			// Set ExprHelper.row so that we can use it as an IndexedVarContainer.
 			ps.exprHelpers[i].Row = row