fix TTL after renaming column

src/Storages/TTLDescription.cpp

@@ -272,6 +272,29 @@ TTLDescription TTLDescription::getTTLFromAST(
 }
 
 
+TTLTableDescription::TTLTableDescription(const TTLTableDescription & other)
+ : definition_ast(other.definition_ast ? other.definition_ast->clone() : nullptr)
+ , rows_ttl(other.rows_ttl)
+ , move_ttl(other.move_ttl)
+{
+}
+
+TTLTableDescription & TTLTableDescription::operator=(const TTLTableDescription & other)
+{
+    if (&other == this)
+        return *this;
+
+    if (other.definition_ast)
+        definition_ast = other.definition_ast->clone();
+    else
+        definition_ast.reset();
+
+    rows_ttl = other.rows_ttl;
+    move_ttl = other.move_ttl;
+
+    return *this;
+}
+
 TTLTableDescription TTLTableDescription::getTTLForTableFromAST(
     const ASTPtr & definition_ast,
     const ColumnsDescription & columns,

src/Storages/TTLDescription.h

@@ -102,6 +102,10 @@ struct TTLTableDescription
     /// Moving data TTL (to other disks or volumes)
     TTLDescriptions move_ttl;
 
+    TTLTableDescription() = default;
+    TTLTableDescription(const TTLTableDescription & other);
+    TTLTableDescription & operator=(const TTLTableDescription & other);
+
     static TTLTableDescription getTTLForTableFromAST(
         const ASTPtr & definition_ast, const ColumnsDescription & columns, const Context & context, const KeyDescription & primary_key);
 };

tests/queries/0_stateless/01378_alter_rename_with_ttl.reference

+9
+9
+0

tests/queries/0_stateless/01378_alter_rename_with_ttl.sql

+DROP TABLE IF EXISTS table_rename_with_ttl;
+
+CREATE TABLE table_rename_with_ttl
+(
+  date1 Date,
+  value1 String
+)
+ENGINE = ReplicatedMergeTree('/clickhouse/test/table_rename_with_ttl', '1')
+ORDER BY tuple();
+
+INSERT INTO table_rename_with_ttl SELECT toDate('2018-10-01') + number % 3, toString(number) from numbers(9);
+
+SELECT count() FROM table_rename_with_ttl;
+
+SET materialize_ttl_after_modify = 0;
+ALTER TABLE table_rename_with_ttl MODIFY TTL date1 + INTERVAL 1 MONTH;
+
+SELECT count() FROM table_rename_with_ttl;
+
+ALTER TABLE table_rename_with_ttl RENAME COLUMN date1 TO renamed_date1;
+
+ALTER TABLE table_rename_with_ttl materialize TTL settings mutations_sync=2;
+
+SELECT count() FROM table_rename_with_ttl;
+
+DROP TABLE IF EXISTS table_rename_with_ttl;