diff --git a/doc/sql.extensions/README.packages.txt b/doc/sql.extensions/README.packages.txt
index 4216293b109..8c4484cf069 100644
--- a/doc/sql.extensions/README.packages.txt
+++ b/doc/sql.extensions/README.packages.txt
@@ -106,7 +106,7 @@ Objectives:
 
       The following expressions are valid only if all operands are constants:
       1) Arithmetic operations, unary plus/minus
-      2) Bool As Value
+      2) Bool As Value, Boolean compare operations
       3) CAST, COALESCE, CONCATENATE, DECODE, EXTRACT, UPPER/LOWER, SUBSTRING
       4) BIT_LENGTH, CHAR_LENGTH, CHARACTER_LENGTH, OCTET_LENGTH
       5) TRIM, LTRIM, RTRIM, BTRIM
diff --git a/src/dsql/Nodes.h b/src/dsql/Nodes.h
index 778343b2bfd..f3d46472a61 100644
--- a/src/dsql/Nodes.h
+++ b/src/dsql/Nodes.h
@@ -729,6 +729,7 @@ class ExprNode : public DmlNode
 	// SubstringSimilarNode
 	// TrimNode
 	// ValueIfNode
+	// BoolExprNode
 	//
 	// Special:
 	// SysFuncCallNode - see SysFunction::functions
@@ -818,6 +819,11 @@ class BoolExprNode : public ExprNode
 		return KIND_BOOLEAN;
 	}
 
+	virtual bool constant() const override
+	{
+		return isChildrenConstant();
+	}
+
 	BoolExprNode* dsqlPass(DsqlCompilerScratch* dsqlScratch) override
 	{
 		ExprNode::dsqlPass(dsqlScratch);