CreateQuery testTable (children 3)
 Identifier testTable
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration A (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration B (children 1)
    DataType Int64
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier A