CREATE TABLE default.tab\n(\n    `a` Float64 STATISTICS(tdigest),\n    `b` Int64 STATISTICS(tdigest),\n    `pk` String\n)\nENGINE = MergeTree\nORDER BY pk\nSETTINGS min_bytes_for_wide_part = 0, index_granularity = 8192
After insert
        Prewhere info
          Prewhere filter
          Prewhere filter column: and(less(a, 10), less(b, 10)) (removed)
10
0
After drop statistic
        Prewhere info
          Prewhere filter
          Prewhere filter column: and(less(b, 10), less(a, 10)) (removed)
10
CREATE TABLE default.tab\n(\n    `a` Float64,\n    `b` Int64,\n    `pk` String\n)\nENGINE = MergeTree\nORDER BY pk\nSETTINGS min_bytes_for_wide_part = 0, index_granularity = 8192
After add statistic
CREATE TABLE default.tab\n(\n    `a` Float64 STATISTICS(tdigest),\n    `b` Int64 STATISTICS(tdigest),\n    `pk` String\n)\nENGINE = MergeTree\nORDER BY pk\nSETTINGS min_bytes_for_wide_part = 0, index_granularity = 8192
After materialize statistic
        Prewhere info
          Prewhere filter
          Prewhere filter column: and(less(a, 10), less(b, 10)) (removed)
20
After merge
        Prewhere info
          Prewhere filter
          Prewhere filter column: and(less(a, 10), less(b, 10)) (removed)
20
CREATE TABLE default.tab\n(\n    `a` Float64 STATISTICS(tdigest),\n    `c` Int64 STATISTICS(tdigest),\n    `pk` String\n)\nENGINE = MergeTree\nORDER BY pk\nSETTINGS min_bytes_for_wide_part = 0, index_granularity = 8192
After rename
        Prewhere info
          Prewhere filter
          Prewhere filter column: and(less(a, 10), less(c, 10)) (removed)
20