CreateQuery customer (children 3)
 Identifier customer
 Columns definition (children 1)
  ExpressionList (children 8)
   ColumnDeclaration C_CUSTKEY (children 1)
    DataType UInt32
   ColumnDeclaration C_NAME (children 1)
    DataType String
   ColumnDeclaration C_ADDRESS (children 1)
    DataType String
   ColumnDeclaration C_CITY (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration C_NATION (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration C_REGION (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration C_PHONE (children 1)
    DataType String
   ColumnDeclaration C_MKTSEGMENT (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 2)
  Function MergeTree
  Identifier C_CUSTKEY
