问题
I can connect to my Sybase IQ 16 database using a connection string such as:
myDB_conn <- dbConnect(odbc(), "MyDSN_Name")
When I run this command the connections view shows a list of databases and corresponding tables/views. However when I try to use the logic laid out here specifically naming the view I keep receiving an error about my view not being found.
test <- tbl(myDB_conn, "OFFSHORE_BOB.SOME_VIEW_OR_TABLE_NAME")
In the connection window I can see the database and view but when I use the code above I receive a table name not found.
nanodbc/nanodbc.cpp:1374: 42S02: [Sybase][ODBC Driver][Sybase IQ]Table 'OFFSHORE_BOB.SOME_VIEW_OR_TABLE_NAME' not found
I have also looked at listing the tables in the OFFSHORE_BOB schema and I can see the table of interest in there:
y <- dbListTables(gopher_conn, schema = 'OFFSHORE_BOB')
I then searched for the view of interest and I can see it there so I am stumped as to why I can not use this code
test <- tbl(myDB_conn, "OFFSHORE_BOB.SOME_VIEW_OR_TABLE_NAME")
Any suggestions would be greatly appreciated.
回答1:
You most likely want the in_schema command from dbplyr. For example:
schema = "OFFSHORE_BOB"
tbl_name = "SOME_VIEW_OR_TABLE_NAME"
remote_table <- tbl(db_connection, from = in_schema(schema, tbl_name))
Then show_query(remote_table) should return something like:
SELECT *
FROM "OFFSHORE_BOB"."SOME_VIEW_OR_TABLE_NAME"
(The quotation marks are inserted by dbplyr in case your table or schema name contains non-standard characters. E.g. abc-123 and 3-4 are not acceptable table names by themselves, but quoted "abc-123" and "3-4" they can be table or schema names.)
Note that you can also include a database name in with the schema name should you need to:
remote_table <- tbl(db_connection, from = in_schema(paste0(db,".",schema), table_name))
来源：https://stackoverflow.com/questions/62723999/using-odbcdbconnect-and-dplyr-to-connect-to-sybase-iq-database-table-name-no