* PostgreSQL Data Provider
<ul>
- <li>Exists in namespace Mono.Data.PostgreSql and assembly Mono.Data.PostgreSql
+ <li>Exists in namespace Mono.Data.PostgreSql and assembly Mono.Data.PostgreSql</li>
<li>Is a Mono Data Provider for the <a href="http://www.postgresql.org/">PostgreSQL</a>
- client/server database management system.
+ client/server database management system.</li>
<li>Written in C# and has C# bindings to the PostgreSQL C Client library pq.dll on Windows
- and libpq.so on Linux.
+ and libpq.so on Linux.</li>
+
+ <li>Alternative to the PostgreSQL provider in Mono:
+ <ul>
+ <li><a href="http://gborg.postgresql.org/project/npgsql/projdisplay.php">Npgsql</a>
+ is a Managed PostgreSQL provider written in 100% C#, does not require a client library,
+ and works on Microsoft .NET and Mono.
+ </li>
+ </ul>
+ </li>
+
+ <li>See Testing for both Mono's Mono.Data.PostgreSqlClient and Npgsql.</li>
</ul>
-* Current Status
+** Current Status
<ul>
<li>We are able to do simple CREATE TABLE, DROP TABLE, UPDATE, INSERT, and
See the test mcs/class/System.Data/Test/TestSqlDataAdapter.cs to see it in action.
</ul>
-* Testing the PostgreSQL Provider
+** Action Plan
+
+ <p>More testing and fixing bugs...
+
+ <p>Eventually replace the PostgreSQL data provider in Mono
+ with <a href="http://gborg.postgresql.org/project/npgsql/projdisplay.php">Npgsql</a>.
+ Npgsql is a .Net Data Provider for PostgreSQL which implements
+ the <a href="http://developer.postgresql.org/docs/postgres/protocol.html">PostgreSQL Frontend/Backend Protocol</a>.
+ Npgsql is implemented in 100% C#. This provider was created by Francisco Figueiredo jr.
+ and has many programmers developing the provider.
+
+** Testing Mono's Mono.Data.PostgreSqlClient
<ul>
* <p>In order to test Mono.Data.PostgreSqlClient, you will need to have
access to a remote PostgreSQL DBMS, or you will have to install
- one locally. PostgreSQL was first ADO.NET provider created in Mono.
+ one locally. PostgreSQL was the first ADO.NET provider created in Mono.
<p>Why use PostgreSQL? Because it is free software, has a client
library that is easy to use, PostgreSQL is easy to install on
user "postgres".
<pre>
-"host=localhost;dbname=test;user=postgres"
+"Server=localhost;Database=test;User ID=postgres;Password=fun2db"
+ (or)
+"host=localhost;dbname=test;user=postgres;password=fun2db"
</pre>
</ul>
* <p>Important notes from this file are:
<ul>
- <p><b>2.</b> - Install the latest <a href="http://www.neuro.gatech.edu/users/cwilson/cygutils/OBSOLETE/V1.1/cygipc/index.html">CygIPC</a> package.
+ <p><b>2.</b> - Install the latest <a href="http://www.neuro.gatech.edu/users/cwilson/cygutils/cygipc/index.html">CygIPC</a> package.
+ Cygwin includes a utility bunzip2 which can be used to unzip it. Now, change to
+ the root directory by
+ typing "cd /" then
+ you can use "tar xvf cygipc.xxx.tar" to untar it
+ in the root directory in cygwin.
- <p>The cygipc package contains the ipc-daemon you will need
+ <p>The cygipc package contains the support to run ipc-daemon
+ that you will need
to run before you can
run the PostgreSQL DBMS Server daemon (postmaster) or run
initdb which initializes the PostgreSQL database.
</ul>
<p>In the path mcs/class/System.Data/Test
- there is a PostgreSQL test program named
+ there is a test for Mono.Data.PostgreSqlClient named
PostgreTest.cs. Thanks goes to Gonzalo for creating the original
PostgreSQL test.
-
- <p>To use it to test System.Data, you
- modify the file to your PostgreSQL database
- connection requirements:
-
- <p>
- <ul>
- <li><b>dbname</b> database, ie., test</li>
- <li><b>host</b> hostname of the PostgreSQL DBMS Server, ie., localhost</li>
- <li><b>user</b> username, ie., someuser</li>
- <li><b>password</b> password, ie., mypass1234</li>
- </ul>
-
- <p>The connection string is in OLE-DB connection string format. Internally,
- SqlConnection converts this to the PostgreSQL connection string format.
-
- <p>
-<pre>
- OLE-DB: "host=localhost;dbname=test;user=joe;password=smoe"
-PostgreSQL: "host=localhost dbname=test user=joe password=smoe"
-</pre>
-
- <p>
- Note that OLE-DB includes the semicolons while PostgreSQL's connection
- string does not.
<p>
To compile the PostgresTest.cs program, do:
to PgSqlConnection, then you need to run mcs like:
<pre>
- mono f:/cygwin/home/DanielMorgan/mono/install/bin/mcs.exe \
+ mono C:/cygwin/home/MyHome/mono/install/bin/mcs.exe \
PostgresTest.cs \
-r System.Data.dll \
-r Mono.Data.PostgreSqlClient.dll
To run using mono, do:
<pre>
mono PostgresTest.exe
-</pre>
-
- <p>Below, I show how the output from PostgresTest. I have omitted a lot
- of the meta data for the columns except two columns. The classes
- used were from Mono.Data.PostgreSqlClient and were used to connect to a
- PostgreSQL database and retrieve data.
-
-<p>
-<pre>
-
- danmorg@DANPC ~/mono/mcs/class/System.Data/Test
- $ mcs PostgresTest.cs -r System.Data.dll
-
- danmorg@DANPC ~/mono/mcs/class/System.Data/Test
- $ mono PostgresTest.exe
- Postgres provider specific tests...
-
- Drop table:
- Error (don't worry about this one)SqlError:PGRES_FATAL_ERROR ERROR:
- table "mono_postgres_test" does not exist
- <Stack Trace>
-
- Create table with all supported types:
- OK
- Insert values for all known types:
- OK
- Update values:
- OK
- Insert values for all known types:
- OK
- Aggregate: count(*)
- Agg Result: 2
- Aggregate: min(text_value)
- Agg Result: This is a text
- Aggregate: max(int4_value)
- Agg Result: 1048000
- Aggregate: sum(int4_value)
- Agg Result: 1048003
- Select values from the database:
- Result is from a SELECT SQL Query. Records Affected: -1
- Result Set 1...
- Total Columns: 28
- ColumnName = boolean_value
- ColumnOrdinal = 1
- ColumnSize = 1
- NumericPrecision = 0
- NumericScale = 0
- IsUnique = False
- IsKey =
- BaseCatalogName =
- BaseColumnName = boolean_value
- BaseSchemaName =
- BaseTableName =
- DataType = System.Boolean
- AllowDBNull = False
- ProviderType = 16
- IsAliased = False
- IsExpression = False
- IsIdentity = False
- IsAutoIncrement = False
- IsRowVersion = False
- IsHidden = False
- IsLong = False
- IsReadOnly = False
-
- ...
-
- ColumnName = null_timestamp_value
- ColumnOrdinal = 28
- ColumnSize = 8
- NumericPrecision = 0
- NumericScale = 0
- IsUnique = False
- IsKey =
- BaseCatalogName =
- BaseColumnName = null_timestamp_value
- BaseSchemaName =
- BaseTableName =
- DataType = System.DateTime
- AllowDBNull = False
- ProviderType = 1184
- IsAliased = False
- IsExpression = False
- IsIdentity = False
- IsAutoIncrement = False
- IsRowVersion = False
- IsHidden = False
- IsLong = False
- IsReadOnly = False
-
- Gonna do a Read() now...
- Row 0:
- Col 0: boolean_value: False
- Col 1: int2_value: 5
- Col 2: int4_value: 3
- Col 3: bigint_value: 9
- Col 4: float_value: 3.141590
- Col 5: double_value: 3.14159
- Col 6: numeric_value: 123456789012.345
- Col 7: char_value: Mono.Data!
- Col 8: varchar_value: It was not me!
- Col 9: text_value: We got data!
- Col 10: point_value: (1,0)
- Col 11: time_value: 01/01/1 21:13:14
- Col 12: date_value: 02/29/2000 00:00:00
- Col 13: timestamp_value: 02/29/2004 14:00:11
- Col 14: null_boolean_value is NULL
- Col 15: null_int2_value is NULL
- Col 16: null_int4_value is NULL
- Col 17: null_bigint_value is NULL
- Col 18: null_float_value is NULL
- Col 19: null_double_value is NULL
- Col 20: null_numeric_value is NULL
- Col 21: null_char_value is NULL
- Col 22: null_varchar_value is NULL
- Col 23: null_text_value is NULL
- Col 24: null_point_value is NULL
- Col 25: null_time_value is NULL
- Col 26: null_date_value is NULL
- Col 27: null_timestamp_value is NULL
- Row 1:
- Col 0: boolean_value: True
- Col 1: int2_value: -22
- Col 2: int4_value: 1048000
- Col 3: bigint_value: 123456789012345
- Col 4: float_value: 3.141590
- Col 5: double_value: 3.14159
- Col 6: numeric_value: 123456789012.345
- Col 7: char_value: This is a char
- Col 8: varchar_value: This is a varchar
- Col 9: text_value: This is a text
- Col 10: point_value: (1,0)
- Col 11: time_value: 01/01/1 21:13:14
- Col 12: date_value: 02/29/2000 00:00:00
- Col 13: timestamp_value: 02/29/2004 14:00:11
- Col 14: null_boolean_value is NULL
- Col 15: null_int2_value is NULL
- Col 16: null_int4_value is NULL
- Col 17: null_bigint_value is NULL
- Col 18: null_float_value is NULL
- Col 19: null_double_value is NULL
- Col 20: null_numeric_value is NULL
- Col 21: null_char_value is NULL
- Col 22: null_varchar_value is NULL
- Col 23: null_text_value is NULL
- Col 24: null_point_value is NULL
- Col 25: null_time_value is NULL
- Col 26: null_date_value is NULL
- Col 27: null_timestamp_value is NULL
- Total Rows Retrieved: 2
- Total Result sets: 1
- Call ExecuteReader with a SQL Command.
- (Not INSERT,UPDATE,DELETE
- ).
- Result is from a SQL Command not (INSERT,UPDATE,DELETE).
- Records Affected: -1
- Total Result sets: 0
- Call ExecuteReader with a SQL Command.
- (Is INSERT,UPDATE,DELETE)
- .
- Result is from a SQL Command (INSERT,UPDATE,DELETE). Records Affected: 1
- Total Result sets: 0
- Calling stored procedure version()
- Result: PostgreSQL 7.2.1 on i686-pc-cygwin, compiled by GCC 2.95.3-5
- Database Server Version: PostgreSQL 7.2.1 on i686-pc-cygwin,
- compiled by GCC 2.9
- 5.3-5
- Clean up...
- Drop table...
- OK
- RESULT: 0
+</pre>
+ <p>C# Example for Mono.Data.PostgreSqlClient:
+<pre>
+ using System;
+ using System.Data;
+ using Mono.Data.PostgreSqlClient;
+
+ public class Test
+ {
+ public static void Main(string[] args)
+ {
+ string connectionString =
+ "Server=localhost;" +
+ "Database=test;" +
+ "User ID=postgres;" +
+ "Password=fun2db;";
+ IDbConnection dbcon;
+ dbcon = new PgConnection(connectionString);
+ IDbCommand dbcmd = dbcon.CreateCommand();
+ // requires a table to be created named employee
+ // with columns firstname and lastname
+ // such as,
+ // CREATE TABLE employee (
+ // firstname varchar(32),
+ // lastname varchar(32));
+ string sql =
+ "SELECT firstname, lastname" +
+ "FROM employee";
+ dbcmd.ConnectionString = sql;
+ IDataReader reader = dbcmd.ExecuteReader();
+ while(reader.Read()) {
+ string FirstName = reader["firstname"];
+ string LastName = reader["lastname"];
+ Console.WriteLine("Name: " +
+ FirstName + " " + LastName);
+ }
+ // clean up
+ reader.Close();
+ reader = null;
+ dbcmd.Dispose();
+ dbcmd = null;
+ dbcon.Close();
+ dbcon = null;
+ }
+ }
+</pre>
+ </li>
+ <li>Building C# Example:
+ <ul>
+ <li>Save the example to a file, such as, TestExample.cs</li>
+ <li>Build on Linux:
+<pre>
+ mcs TestExample.cs -r System.Data.dll \
+ -r Mono.Data.PostgreSqlClient.dll
+</pre>
+ </li>
+ <li>Build on Windows via Cygwin:
+<pre>
+ mono C:/cygwin/home/MyHome/mono/install/bin/mcs.exe \
+ TestExample.cs \
+ -lib:C:/cygwin/home/MyHome/mono/install/lib \
+ -r System.Data.dll -r Mono.Data.PostgreSqlClient.dll
+</pre>
+ </li>
+ </ul>
+ </li>
+ <li>Running the Example:
+<pre>
+mono TestExample.exe
</pre>
+</li>
+</ul>
-* Action Plan
+** Testing Npgsql
- <p>Eventually replace the PostgreSQL data provider in Mono
- with <a href="http://gborg.postgresql.org/project/npgsql/projdisplay.php">Npgsql</a>.
- Npgsql is a .Net Data Provider for PostgreSQL which implements
- the <a href="http://developer.postgresql.org/docs/postgres/protocol.html">PostgreSQL Frontend/Backend Protocol</a>.
- Npgsql is implemented in 100% C#. This provider was created by Francisco Figueiredo jr.
- and has many programmers developing the provider.
+<ul>
+ <li>Have a working mono and mcs</li>
+
+ <li>Get <a href="http://gborg.postgresql.org/project/npgsql/projdisplay.php">Npgsql</a>
+ and make sure the binary assembly Npgsql.dll is installed in the same place that the
+ mono class libraries are located.
+
+ <li>Read the Testing notes for Mono.Data.PostgreSqlClient too
+
+ <li>C# Example for Npgsql:
+<pre>
+ using System;
+ using System.Data;
+ using Npgsql;
+
+ public class Test
+ {
+ public static void Main(string[] args)
+ {
+ string connectionString =
+ "Server=localhost;" +
+ "Database=test;" +
+ "User ID=postgres;" +
+ "Password=fun2db;";
+ IDbConnection dbcon;
+ dbcon = new NpgsqlConnection(connectionString);
+ IDbCommand dbcmd = dbcon.CreateCommand();
+ // requires a table to be created named employee
+ // with columns firstname and lastname
+ // such as,
+ // CREATE TABLE employee (
+ // firstname varchar(32),
+ // lastname varchar(32));
+ string sql =
+ "SELECT firstname, lastname " +
+ "FROM employee";
+ dbcmd.ConnectionString = sql;
+ IDataReader reader = dbcmd.ExecuteReader();
+ while(reader.Read()) {
+ string FirstName = reader["firstname"];
+ string LastName = reader["lastname"];
+ Console.WriteLine("Name: " +
+ FirstName + " " + LastName);
+ }
+ // clean up
+ reader.Close();
+ reader = null;
+ dbcmd.Dispose();
+ dbcmd = null;
+ dbcon.Close();
+ dbcon = null;
+ }
+ }
+</pre>
+ </li>
+ <li>Building C# Example:
+ <ul>
+ <li>Save the example to a file, such as, TestExample.cs</li>
+ <li>Build on Linux:
+<pre>
+ mcs TestExample.cs -r System.Data.dll \
+ -r Npgsql.dll
+</pre>
+ </li>
+ <li>Build on Windows via Cygwin:
+<pre>
+ mono C:/cygwin/home/MyHome/mono/install/bin/mcs.exe \
+ TestExample.cs \
+ -lib:C:/cygwin/home/MyHome/mono/install/lib \
+ -r System.Data.dll -r Npgsql.dll
+</pre>
+ </li>
+ </ul>
+ </li>
+ <li>Running the Example:
+<pre>
+mono TestExample.exe
+</pre>
+</li>
+</ul>
+
projects / mono.git / blobdiff