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Oracle driver for Elixir

License: Other

Elixir 100.00%

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oralixir's Issues

oranif fails to compile with OTP 24

Currently on macOS 11.1, installed with asdf:

src/dpi.erl:none: error in parse transform 'dpi_transform': {badarith,
                                           [{dpi_transform,nif_stubs,2,
                                             [{file,
                                               "deps/oranif/src/dpi_transform.erl"},
                                              {line,104}]},
                                            {dpi_transform,parse_transform,2,
                                             [{file,
                                               "deps/oranif/src/dpi_transform.erl"},
                                              {line,70}]},
                                            {compile,foldl_transform,3,
                                             [{file,"compile.erl"},
                                              {line,1145}]},
                                            {compile,fold_comp,4,
                                             [{file,"compile.erl"},
                                              {line,416}]},
                                            {compile,internal_comp,5,
                                             [{file,"compile.erl"},
                                              {line,400}]},
                                            {compile,
                                             '-internal_fun/2-anonymous-0-',2,
                                             [{file,"compile.erl"},
                                              {line,229}]},
                                            {compile,
                                             '-do_compile/2-anonymous-0-',1,
                                             [{file,"compile.erl"},
                                              {line,219}]}]}

Unable to pull OraLixir dependency with tag: 0.1.0

Specifying:

  defp deps do
    [
      {:oralixir, git: "https://github.com/c-bik/OraLixir", tag: "0.1.0"}
    ]
  end

and running mix deps.get results in the following error:
"error: pathspec '0.1.0' did not match any file(s) known to git."

I was able to download OraLixir after removing the tag:

  defp deps do
    [
      {:oralixir, git: "https://github.com/c-bik/OraLixir"}
    ]
  end

Unable to compile without setting OTP_ERTS_DIR in Linux

$ mix compile
===> Compiling oranif
c_src/Makefile:6: *** OTP_ERTS_DIR is not set.  Stop.
===> Hook for compile failed!

** (Mix) Could not compile dependency :oranif, "/home/cfarfan/.mix/rebar3 bare compile --paths="/home/cfarfan/sandbox/elixir/oratest2/_build/dev/lib/*/ebin"" command failed. You can recompile this dependency with "mix deps.compile oranif", update it with "mix deps.update oranif" or clean it with "mix deps.clean oranif"

The oranif Makefile is still checking for the variable:

ifndef OTP_ERTS_DIR
$(error OTP_ERTS_DIR is not set)
endif

Hard coded DB Connection credentials

I had issues connecting with the hardcoded "regit" password. Shouldn't the values be in a configuration file?

defp create_context_connection(ora, opts) do
  username = Keyword.get(opts, :username, "scott")
  password = Keyword.get(opts, :password, "regit")

...

Getting 'DPI-1028: query position 1 is invalid' after trying to delete a row from a table

iex(2)> OraLixir.prepare_execute(pid, "name", "DELETE FROM CHANNELS WHERE CHANNEL_ID = 3", [], [])
** (ArgumentError) raise/1 and reraise/2 expect a module name, string or exception as the first argument, got: {:error, %{api: :stmt_getQueryInfo, args: [#Reference<0.1725727705.1425145874.206828>, 1], node: nil, oranifFile: 'c_src/dpiStmt_nif.c', oranifLine: 183, reason: %{action: 'check query position', code: 0, encoding: 'UTF-8', fnName: 'dpiStmt_getQueryInfo', isRecoverable: false, message: 'DPI-1028: query position 1 is invalid', offset: 0, sqlState: 'HY000'}}}
    (oralixir) lib/oralixir/connection.ex:136: anonymous fn/4 in OraLixir.Connection.handle_execute/4
    (elixir) lib/enum.ex:3019: Enum.reduce_range_dec/4
    (oralixir) lib/oralixir/connection.ex:132: OraLixir.Connection.handle_execute/4
    (db_connection) lib/db_connection/holder.ex:293: DBConnection.Holder.holder_apply/4
    (db_connection) lib/db_connection.ex:1255: DBConnection.run_execute/5
    (db_connection) lib/db_connection.ex:1342: DBConnection.run/6
    (db_connection) lib/db_connection.ex:540: DBConnection.parsed_prepare_execute/5
    (db_connection) lib/db_connection.ex:533: DBConnection.prepare_execute/4

See complete error message in attachment:
OraNif_error.txt

Support of binding parameters

Hello,

The work you've done looks promising! But seems like there is no support of bind variables. I have found a few examples in the tests of oranif and could make simple code which binds one variable and it seems working:

# INSERT INTO foo(value) VALUES (:1) [param]
param = "example"

%{var: v} = oranif(slave, :conn_newVar, [conn, :DPI_ORACLE_TYPE_VARCHAR, :DPI_NATIVE_TYPE_BYTES, byte_size(param), byte_size(param), true, false, :null])
oranif(slave, :stmt_bindByName, [statement, ":1", v]), label: :stmt_bindByName
oranif(slave, :var_setFromBytes, [v, 0, param]), label: :var_setFromBytes

oranif(slave, :stmt_execute, [statement, []])

So I think theoretically it is doable to add this feature to the library, but I couldn't find any docs about the mapping between data types in Erlang and ODPI and how to basically use bind variables.

I would really appreciate if you could point me to any docs or code where I could find more information about bind variables and how to use them with oranif 🙏

OraLixir warning about not find Priv directory

$ iex -S mix
Erlang/OTP 22 [erts-10.5.2] [source] [64-bit] [smp:4:4] [ds:4:4:10] [async-threads:1] [hipe]

Interactive Elixir (1.9.1) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> {:ok, pid} = OraLixir.start_link([])
{dpi,load_unsafe,87} priv not found
{dpi,load_unsafe,101} PrivDir "/home/cfarfan/sandbox/elixir/oratest/_build/dev/lib/oranif/priv"
{:ok, #PID<0.212.0>}

The directory exist. It is a symlink to /home/cfarfan/sandbox/elixir/oratest/deps/oranif/priv
I was able to use the connection and execute some queries after this warning

Received warning about behaviour Exception not being implemented after compiling OraLixir

==> oralixir
Compiling 5 files (.ex)
warning: function message/1 required by behaviour Exception is not implemented (in module OraLixir.Error)
lib/oralixir/error.ex:1: OraLixir.Error (module)

maximum cursors issue and no means to cleanly close connection.

I have been attempting to make use of OraLixir/Oranif to connect to dozens of oracle databses, and have found an issue.

There is a query that I must fire off about once very five seconds across all of the databases. In this OraLixir is great, as I can do that in a couple of milliseconds.
The problem comes in that, after about one and a half ours of queries, individual connections begin to report that I have reached the maximum number of allowed open cursors. Not all databases reach the limit at the same time, leading me to believe that the issue may simply be some race condition for which cursors may end up being left open.
I amsimply doing
OraLixir.prepare_execute(connection, 'connection_id', query, params, options)
for options I've tried rand_exp backoff with a min time of 30 seconds and a max_restarts of 0

To further add to this, I cannot find any means by which to cleanly request that the connection be closed/disconnected. I'd like to disconnect the connection, and re-establish it when max cursors are reached if there is no simple means by which to prevent the max cursors issue.
Attempting DBConnection.close(connection, query) does not disconnec the connection from the database.

Please let me know if there is something I'm missing.

Thank you.

Instructions title and dependencies refer to "Oracle" instead of "OraLixir"

Shouldn't the title in the instructions be "OraLixir", and the dependencies refer to:

  defp deps do
    [
      {:oralixir, git: "https://github.com/c-bik/OraLixir", tag: "0.1.0"}}
    ]
  end

Typo in new deps intructions

The Installation section refers to:

{:oralixir, git: "https://github.com/c-bik/OraLixir"}}

But, that line has an extra "}" at the end. It should just be:

{:oralixir, git: "https://github.com/c-bik/OraLixir"}

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