CreateQuery table_for_alter (children 3)
 Identifier table_for_alter
 Columns definition (children 1)
  ExpressionList (children 7)
   ColumnDeclaration d (children 1)
    DataType Date
   ColumnDeclaration a (children 1)
    DataType String
   ColumnDeclaration b (children 1)
    DataType UInt8
   ColumnDeclaration x (children 1)
    DataType String
   ColumnDeclaration y (children 1)
    DataType Int8
   ColumnDeclaration version (children 1)
    DataType UInt64
   ColumnDeclaration sign (children 2)
    DataType Int8
    Literal UInt64_1
 Storage definition (children 4)
  Function ReplicatedVersionedCollapsingMergeTree (children 1)
   ExpressionList (children 4)
    Literal \'/clickhouse/tables/{database}/01526_alter_add/t1\'
    Literal \'1\'
    Identifier sign
    Identifier version
  Identifier y
  Identifier d
  Set
