Merge 64525044fb into 7fd2207626

Fix CI

src/Storages/AlterCommands.cpp

@@ -1488,6 +1488,11 @@ void AlterCommands::validate(const StoragePtr & table, ContextPtr context) const
                         ErrorCodes::BAD_ARGUMENTS,
                         "Column {} doesn't have COMMENT, cannot remove it",
                         backQuote(column_name));
+                if (command.to_remove == AlterCommand::RemoveProperty::SETTINGS && column_from_table.settings.empty())
+                    throw Exception(
+                        ErrorCodes::BAD_ARGUMENTS,
+                        "Column {} doesn't have SETTINGS, cannot remove it",
+                        backQuote(column_name));
             }
 
             modified_columns.emplace(column_name);

tests/queries/0_stateless/02870_per_column_settings.sql

@@ -71,3 +71,8 @@ CREATE TABLE tab
 ENGINE = MergeTree
 ORDER BY id
 SETTINGS min_bytes_for_wide_part = 1; -- {serverError UNKNOWN_SETTING}
+
+-- https://github.com/ClickHouse/ClickHouse/issues/69634
+CREATE TABLE t0 (c0 Int8) ENGINE = CollapsingMergeTree(c0) ORDER BY tuple();
+ALTER TABLE t0 MODIFY COLUMN c0 REMOVE SETTINGS; -- {serverError BAD_ARGUMENTS}
+DROP TABLE t0;