https://github.com/hymkor/oluacle
Lua for Oracle (executable/dynamic link library for Windows)
https://github.com/hymkor/oluacle
lua oracle oracle-database
Last synced: 20 days ago
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Lua for Oracle (executable/dynamic link library for Windows)
- Host: GitHub
- URL: https://github.com/hymkor/oluacle
- Owner: hymkor
- Created: 2019-12-28T17:51:30.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2019-12-28T18:15:08.000Z (over 5 years ago)
- Last Synced: 2025-02-10T15:50:56.561Z (2 months ago)
- Topics: lua, oracle, oracle-database
- Language: C
- Homepage:
- Size: 41 KB
- Stars: 1
- Watchers: 1
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: readme.md
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README
Oluacle - Lua for Oracle
========================
`oluacle` is a library to access Oracle database.
Diffences from LuaSQL are:
* Bind-variable supported.
* Few Lines required to access database
* Supports Oracle-database only.
Oluacle are executable and library's set.
* Executable: (oluacle.exe[Windows])
* Include lua interpretor.
* Library: (oluacle.dll / oluacle.so)
* Standard Lua interpretor can include it with 'require' statement.
Sample
======
One-liner
---------
Print a list of tables which `HR` -- Oracle Express Edition's sample user -- owns.
### Windows
Call Excutable on command prompt:
C:> oluacle.exe -e "for rs in oluacle.new('HR','HR'):exec('select * from tab') do print(rs.TNAME) end"
- On standard lua intepretor, include library:
C:> lua.exe -e "for rs in require('oluacle').new('HR','HR'):exec('select * from tab') do print(rs.TNAME) end"
### Linux
include library:
$ lua -e 'for rs in require('oluacle').new("HR","HR"):exec("select * from tab") do print(rs.TNAME) end'
Another sample
--------------
print a list of tablespaces
### SOURCE:
conn=(oluacle or require('oluacle')).new(arg[1],arg[2])
print(("%-10s %15s %15s"):format("TABLESPACE","ALLSIZE[KB]","FREESIZE[KB]"))
print("------------------------------------------")
for rs in conn:exec([[
SELECT t.TABLESPACE_NAME as TABLESPACE_NAME ,
TRUNC(NVL(SUM(d.BYTES),0)/1024) as KBYTES ,
TRUNC(NVL(SUM(f.BYTES),0)/1024) as KFREE
FROM sys.dba_tablespaces t,
sys.dba_data_files d,
sys.dba_free_space f
WHERE t.TABLESPACE_NAME = d.TABLESPACE_NAME
AND t.TABLESPACE_NAME = f.TABLESPACE_NAME(+)
GROUP BY t.rowid, t.TABLESPACE_NAME
ORDER BY t.rowid
]]) do
print(("%-10s %15d %15d"):format(
rs.TABLESPACE_NAME , rs.KBYTES , rs.KFREE ))
end
print("------------------------------------------")
conn:disconnect()
### OUTPUT
$ lua dbfree.lua (DBA-username) (password)
TABLESPACE ALLSIZE[KB] FREESIZE[KB]
------------------------------------------
SYSTEM 696320 2496
UNDO 460800 76928
SYSAUX 10106880 21632
USERS 921600 100416
------------------------------------------
$
Install
=======
### Windows
- put oluacle.dll and oluacle.exe on the one directory of
directories pointed %PATH%.
### Linux
make -f Makefile.lin
(requires lua-5.2.0)
Syntax
======
require 'oluacle'
-------------------------
Load oluacle.dll or oluacle.so and return the table with the method 'new'
to connect database.
oluacle = require('oluacle')
On oluacle.exe, it has not to do 'require'. The symbol 'oluacle' is used.
oluacle.new
-----------
Connect a Oracle-database and return connection-object.
conn = oluacle.new('USERNAME','PASSWORD'[,'DBNAME'][,OPTIONTABLE])
When connection failed, error occurs.
OPTIONTABLE :
{ null=VALUE }
Value used as NULL. default value is false.
You can not set nil.
CONN:exec
---------
Execute SQL. conn is the return-value of oluacle.new
When SQL is 'SELECT', it returns iterator and statement-handle.
When SQL is 'INSERT','UPDATE' or 'DELETE', it returns the number of records.
ITERATOR,BUFFER = conn:exec(SQL-STRING,B1,B2...)
or
ITERATOR,BUFFER = conn:exec(SQL-STRING,{V1=B1,V2=B2...} )
B1,B2 are values for bind-variables. V1,V2 are names of bind-variables.
You call this with generic-for.
for rs in conn:exec(SQL-STRING,B1,B2...) do
:
end
The table-variable 'rs' has values which you can access with 3-styles:
(1) rs[1], rs[2] ...
(2) rs.COLUMNNAME1, rs.COLUMNNAME2 ...
(3) rs["COLUMNNAME1"] , rs["COLUMNNAME2"]
- NULL value is represented with 'false' by default.
'new' method can change it with { null=... } except for nil.
- DATE value is represented with string formated 'YYYY/MM/DD HH24:MI:SS'
CONN:commit , CONN:rollback , CONN:disconnect
---------------------------------------------
`CONN:commit()` does commit database.
`CONN:disconnect()` rolls back database and disconnect.
When CONN is collected as garbage, CONN:disconnect is called.
TO DO
=====
* function to trap error.
* BLOB
Bug report
==========
This package is tested on these softwares.
* WindowsXP SP3
* Mingw
* Oracle 10g Express Edition.
* Fedora 10
* Oracle 11g Instant Client
When you find bugs or have a question, please mail to [email protected].
You can copy and modify oluacle with MIT License.