Relevel a factor column when adding a subset of current factors

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: tiledb
 Type: Package
-Version: 0.33.0
+Version: 0.33.0.1
 Title: Modern Database Engine for Complex Data Based on Multi-Dimensional Arrays
 Authors@R: c(
   person("TileDB, Inc.", role = c("aut", "cph")),

NEWS.md

@@ -1,3 +1,9 @@
+# tiledb (development version)
+
+## Bug Fixes
+
+* The factor levels are now remapped as expected when updating an array with values that include no additional factor levels (@cgiachalis in [#844](https://github.com/TileDB-Inc/TileDB-R/pull/844))
+
 # tiledb 0.33.0
 
 * This release of the R package builds against [TileDB 2.29.0](https://github.com/TileDB-Inc/TileDB/releases/tag/2.29.0), and has also been tested against earlier releases as well as the development version

R/TileDBArray.R

@@ -1498,6 +1498,14 @@ setMethod(
             ase <- tiledb_array_schema_evolution_extend_enumeration(ase, arr, allnames[k], added_enums)
             tiledb::tiledb_array_schema_evolution_array_evolve(ase, uri)
             value[[k]] <- factor(value[[k]], levels = unique(c(dictionary, added_enums)), ordered = is.ordered(value[[k]]))
+
+            } else if (!setequal(new_levels, dictionary) && !is.null(new_levels)) {
+            # relevel when having a subset of existing levels, e.g "c" out of c("a","b","c")
+            # See issue: https://github.com/TileDB-Inc/TileDB-R/issues/843
+            levels <- unique(c(dictionary, new_levels))
+            is_ordered <- tiledb_attribute_is_ordered_enumeration_ptr(attr, arrptr)
+            value[[k]] <- factor(value[[k]], levels = levels, ordered = is_ordered)
+            spdl::trace("[tiledb_array] '[<-' releveled column {} {}", k, is_ordered)
           }
         }
 

inst/tinytest/test_arrayschemaevolution.R

@@ -179,6 +179,79 @@ ref <- rbind(df1, df2)
 expect_equivalent(res, ref) # equivalent because of query status attribute
 
 
+## test that factor levels are re-leveled with new updates
+## but existing levels (case with subset of current levels fixing issue 843)
+uri <- tempfile()
+df1 <- data.frame(id = 1:3, obs = factor(c("A", "B", "C")))
+fromDataFrame(df1, uri, col_index=1, tile_domain=c(1L, 5L))
+df2 <- data.frame(id = 4:5, obs = factor(c("B", "C")))
+fromDataFrame(df2, uri, col_index=1, mode="append")
+
+res <- tiledb_array(uri, return_as="data.frame")[]
+
+expect_equal(nrow(res), 5)
+expect_equal(nlevels(res[["obs"]]), 3)
+expect_equal(levels(res[["obs"]]), c("A", "B", "C"))
+expect_equal(as.integer(res[["obs"]]), c(1L, 2L, 3L, 2L, 3L))
+
+ref <- rbind(df1, df2)
+expect_equivalent(res, ref) # equivalent because of query status attribute
+
+## test that factor levels are re-leveled with new updates
+## but existing levels (case with all current levels)
+uri <- tempfile()
+df1 <- data.frame(id = 1:3, obs = factor(c("A", "B", "C")))
+fromDataFrame(df1, uri, col_index=1, tile_domain=c(1L, 6L))
+df2 <- data.frame(id = 4:6, obs = factor(c("B", "C", "A")))
+fromDataFrame(df2, uri, col_index=1, mode="append")
+
+res <- tiledb_array(uri, return_as="data.frame")[]
+
+expect_equal(nrow(res), 6)
+expect_equal(nlevels(res[["obs"]]), 3)
+expect_equal(levels(res[["obs"]]), c("A", "B", "C"))
+expect_equal(as.integer(res[["obs"]]), c(1L, 2L, 3L, 2L, 3L, 1L))
+
+ref <- rbind(df1, df2)
+expect_equivalent(res, ref) # equivalent because of query status attribute
+
+
+## test that ordered factor levels are re-leveled with new updates
+## but existing levels (case with subset of current levels fixing issue 843)
+uri <- tempfile()
+df1 <- data.frame(id = 1:3, obs = ordered(c("A", "B", "C")))
+fromDataFrame(df1, uri, col_index=1, tile_domain=c(1L, 5L))
+df2 <- data.frame(id = 4:5, obs = ordered(c("B", "C")))
+fromDataFrame(df2, uri, col_index=1, mode="append")
+
+res <- tiledb_array(uri, return_as="data.frame")[]
+
+expect_equal(nrow(res), 5)
+expect_equal(nlevels(res[["obs"]]), 3)
+expect_equal(levels(res[["obs"]]), c("A", "B", "C"))
+expect_equal(as.integer(res[["obs"]]), c(1L, 2L, 3L, 2L, 3L))
+
+ref <- rbind(df1, df2)
+expect_equivalent(res, ref) # equivalent because of query status attribute
+
+## test that ordered factor levels are re-leveled with new updates
+## but existing levels (case with all current levels)
+uri <- tempfile()
+df1 <- data.frame(id = 1:3, obs = ordered(c("A", "B", "C")))
+fromDataFrame(df1, uri, col_index=1, tile_domain=c(1L, 6L))
+df2 <- data.frame(id = 4:6, obs = ordered(c("B", "C", "A")))
+fromDataFrame(df2, uri, col_index=1, mode="append")
+
+res <- tiledb_array(uri, return_as="data.frame")[]
+
+expect_equal(nrow(res), 6)
+expect_equal(nlevels(res[["obs"]]), 3)
+expect_equal(levels(res[["obs"]]), c("A", "B", "C"))
+expect_equal(as.integer(res[["obs"]]), c(1L, 2L, 3L, 2L, 3L, 1L))
+
+ref <- rbind(df1, df2)
+expect_equivalent(res, ref) # equivalent because of query status attribute
+
 ## another test for growing
 uri <- tempfile()
 df1 <- data.frame(rows=11:14, a=200+0:3, b=factor(rep(c("blue", "ornage"), each=2)))