diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c
index 6f6a1f4ffc..675789d104 100644
--- a/src/backend/nodes/nodeFuncs.c
+++ b/src/backend/nodes/nodeFuncs.c
@@ -270,7 +270,7 @@ exprType(const Node *expr)
 			type = exprType(((const JsonCoercion *) expr)->expr);
 			break;
 		default:
-			elog(ERROR, "unrecognized node type: %d", (int) nodeTag(expr));
+			elog(ERROR, "exprType: unrecognized node type: %d", (int) nodeTag(expr));
 			type = InvalidOid;	/* keep compiler quiet */
 			break;
 	}
@@ -1017,7 +1017,7 @@ exprCollation(const Node *expr)
 			}
 			break;
 		default:
-			elog(ERROR, "unrecognized node type: %d", (int) nodeTag(expr));
+			elog(ERROR, "exprCollation: unrecognized node type: %d", (int) nodeTag(expr));
 			coll = InvalidOid;	/* keep compiler quiet */
 			break;
 	}
@@ -1261,7 +1261,7 @@ exprSetCollation(Node *expr, Oid collation)
 			}
 			break;
 		default:
-			elog(ERROR, "unrecognized node type: %d", (int) nodeTag(expr));
+			elog(ERROR, "exprSetCollation: unrecognized node type: %d", (int) nodeTag(expr));
 			break;
 	}
 }
@@ -2531,7 +2531,7 @@ expression_tree_walker(Node *node,
 			}
 			break;
 		default:
-			elog(ERROR, "unrecognized node type: %d",
+			elog(ERROR, "expression_tree_walker: unrecognized node type: %d",
 				 (int) nodeTag(node));
 			break;
 	}
@@ -3588,7 +3588,7 @@ expression_tree_mutator(Node *node,
 			}
 			break;
 		default:
-			elog(ERROR, "unrecognized node type: %d",
+			elog(ERROR, "expression_tree_mutator: unrecognized node type: %d",
 				 (int) nodeTag(node));
 			break;
 	}
@@ -4448,7 +4448,7 @@ raw_expression_tree_walker(Node *node,
 			}
 			break;
 		default:
-			elog(ERROR, "unrecognized node type: %d",
+			elog(ERROR, "raw_expression_tree_walker: unrecognized node type: %d",
 				 (int) nodeTag(node));
 			break;
 	}