CreateQuery lc_prewhere (children 3)
 Identifier lc_prewhere
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration val (children 1)
    DataType UInt64
   ColumnDeclaration str (children 1)
    DataType LowCardinality (children 1)
     ExpressionList (children 1)
      DataType String
   ColumnDeclaration s (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier key
  Set