Hello, 

I came across the following bug that prevents printing of schema definition of the human or mouse inparanoid annotation db packages. 

library(hom.Hs.inp.db)
hom.Hs.inp_dbschema()

Warning message:
In max(ii) : no non-missing arguments to max; returning -Inf

​Changing some lines (135-138) in the AnnDbObj-lowAPI.R fixed the issue for me. using toLower for tableName seems to be the issue.

setMethod("dbschema", "DBIConnection",
    function(x, file="", show.indices=FALSE)
    {
        schema <- dbmeta(x, "DBSCHEMA")
        version <- dbmeta(x, "DBSCHEMAVERSION")
        file <- system.file("DBschemas",
                            paste0("schemas_", version),
                            paste0(schema, ".sql"),
                            package="AnnotationDbi")
        lines <- readLines(file)
        organism <- dbmeta(x, "ORGANISM")
        if(schema == "INPARANOID_DB" && organism != 'Homo sapiens'){
            tableName <- sub(" ", "_", organism)
            ii <- grep(tableName, lines)
            ii <- c(ii[1], ii[1]+1:5, ii[2],ii[3])
            lines <- lines[-ii]
        }

> sessionInfo()
R version 3.3.0 (2016-05-03)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 14.04.4 LTS

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C               LC_TIME=en_US.UTF-8       
 [4] LC_COLLATE=en_US.UTF-8     LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                  LC_ADDRESS=C              
[10] LC_TELEPHONE=C             LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] parallel  stats4    stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] hom.Hs.inp.db_3.1.2  AnnotationDbi_1.34.2 IRanges_2.6.0        S4Vectors_0.10.0    
[5] Biobase_2.32.0       BiocGenerics_0.18.0  BiocInstaller_1.22.2

loaded via a namespace (and not attached):
[1] DBI_0.4-1     tools_3.3.0   RSQLite_1.0.0

Many thanks

-burak

Thanks Burak for reporting this. Should be fixed in AnnotationDbi 1.34.3 (release) and 1.35.3 (devel).

Cheers,

H.