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#region License
// The PostgreSQL License
//
// Copyright (C) 2017 The Npgsql Development Team
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#endregion
#if !NETCOREAPP1_1
using System;
using System.Data;
using NpgsqlTypes;
using NUnit.Framework;
namespace Npgsql.Tests
{
class CommandBuilderTests : TestBase
{
[Test, Description("Tests function parameter derivation with IN, OUT and INOUT parameters")]
public void DeriveParametersVarious()
{
using (var conn = OpenConnection())
{
// This function returns record because of the two Out (InOut & Out) parameters
conn.ExecuteNonQuery(@"
CREATE OR REPLACE FUNCTION pg_temp.func(IN param1 INT, OUT param2 text, INOUT param3 INT) RETURNS record AS
'
BEGIN
param2 = ''sometext'';
param3 = param1 + param3;
END;
' LANGUAGE 'plpgsql';
");
var cmd = new NpgsqlCommand("pg_temp.func", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(3));
Assert.That(cmd.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(cmd.Parameters[1].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[2].Direction, Is.EqualTo(ParameterDirection.InputOutput));
cmd.Parameters[0].Value = 5;
cmd.Parameters[2].Value = 4;
cmd.ExecuteNonQuery();
Assert.That(cmd.Parameters[0].Value, Is.EqualTo(5));
Assert.That(cmd.Parameters[1].Value, Is.EqualTo("sometext"));
Assert.That(cmd.Parameters[2].Value, Is.EqualTo(9));
}
}
[Test, Description("Tests function parameter derivation with IN-only parameters")]
public void DeriveParametersInOnly()
{
using (var conn = OpenConnection())
{
// This function returns record because of the two Out (InOut & Out) parameters
conn.ExecuteNonQuery(@"
CREATE OR REPLACE FUNCTION pg_temp.func(IN param1 INT, IN param2 INT) RETURNS int AS
'
BEGIN
RETURN param1 + param2;
END;
' LANGUAGE 'plpgsql';
");
var cmd = new NpgsqlCommand("pg_temp.func", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(2));
Assert.That(cmd.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(cmd.Parameters[1].Direction, Is.EqualTo(ParameterDirection.Input));
cmd.Parameters[0].Value = 5;
cmd.Parameters[1].Value = 4;
Assert.That(cmd.ExecuteScalar(), Is.EqualTo(9));
}
}
[Test, Description("Tests function parameter derivation with no parameters")]
public void DeriveParametersNoParams()
{
using (var conn = OpenConnection())
{
// This function returns record because of the two Out (InOut & Out) parameters
conn.ExecuteNonQuery(@"
CREATE OR REPLACE FUNCTION pg_temp.func() RETURNS int AS
'
BEGIN
RETURN 4;
END;
' LANGUAGE 'plpgsql';
");
var cmd = new NpgsqlCommand("pg_temp.func", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Is.Empty);
}
}
[Test]
public void FunctionCaseSensitiveNameDeriveParameters()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery(
@"CREATE OR REPLACE FUNCTION pg_temp.""FunctionCaseSensitive""(int4, text) returns int4 as
$BODY$
begin
return 0;
end
$BODY$
language 'plpgsql';");
var command = new NpgsqlCommand("pg_temp.\"FunctionCaseSensitive\"", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(command);
Assert.AreEqual(NpgsqlDbType.Integer, command.Parameters[0].NpgsqlDbType);
Assert.AreEqual(NpgsqlDbType.Text, command.Parameters[1].NpgsqlDbType);
}
}
[Test]
public void DeriveParametersWithParameterNameFromFunction()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery(@"CREATE OR REPLACE FUNCTION pg_temp.testoutparameter2(x int, y int, out sum int, out product int) as 'select $1 + $2, $1 * $2' language 'sql';");
var command = new NpgsqlCommand("pg_temp.testoutparameter2", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(command);
Assert.AreEqual("x", command.Parameters[0].ParameterName);
Assert.AreEqual("y", command.Parameters[1].ParameterName);
}
}
[Test]
public void DeriveInvalidFunction()
{
using (var conn = OpenConnection())
{
var invalidCommandName = new NpgsqlCommand("invalidfunctionname", conn) { CommandType = CommandType.StoredProcedure };
Assert.That(() => NpgsqlCommandBuilder.DeriveParameters(invalidCommandName),
Throws.Exception.TypeOf<PostgresException>()
.With.Property(nameof(PostgresException.SqlState)).EqualTo("42883"));
}
}
[Test, IssueLink("https://github.com/npgsql/npgsql/issues/1212")]
public void TableParameters()
{
using (var conn = OpenConnection())
{
TestUtil.MinimumPgVersion(conn, "9.2.0");
// This function returns record because of the two Out (InOut & Out) parameters
conn.ExecuteNonQuery(@"
CREATE FUNCTION pg_temp.func(IN in1 INT) RETURNS TABLE(t1 INT, t2 INT) AS
'SELECT in1,in1+1' LANGUAGE 'sql';
");
var cmd = new NpgsqlCommand("pg_temp.func", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(3));
Assert.That(cmd.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(cmd.Parameters[1].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[2].Direction, Is.EqualTo(ParameterDirection.Output));
cmd.Parameters[0].Value = 5;
cmd.ExecuteNonQuery();
Assert.That(cmd.Parameters[1].Value, Is.EqualTo(5));
Assert.That(cmd.Parameters[2].Value, Is.EqualTo(6));
}
}
[Test, Description("Tests function parameter derivation for quoted functions with double quotes in the name works")]
public void FunctionQuoteCharactersInNameDeriveParameters()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery(
@"CREATE OR REPLACE FUNCTION pg_temp.""""""FunctionQuote""""CharactersInName""""""(int4, text) returns int4 as
$BODY$
begin
return 0;
end
$BODY$
language 'plpgsql';");
var command = new NpgsqlCommand("pg_temp.\"\"\"FunctionQuote\"\"CharactersInName\"\"\"", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(command);
Assert.AreEqual(NpgsqlDbType.Integer, command.Parameters[0].NpgsqlDbType);
Assert.AreEqual(NpgsqlDbType.Text, command.Parameters[1].NpgsqlDbType);
}
}
[Test, Description("Tests function parameter derivation for quoted functions with dots in the name works")]
public void FunctionDotCharacterInNameDeriveParameters()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery(
@"CREATE OR REPLACE FUNCTION pg_temp.""My.Dotted.Function""(int4, text) returns int4 as
$BODY$
begin
return 0;
end
$BODY$
language 'plpgsql';");
var command = new NpgsqlCommand("pg_temp.\"My.Dotted.Function\"", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(command);
Assert.AreEqual(NpgsqlDbType.Integer, command.Parameters[0].NpgsqlDbType);
Assert.AreEqual(NpgsqlDbType.Text, command.Parameters[1].NpgsqlDbType);
}
}
[Test, Description("Tests if the right function according to search_path is used in function parameter derivation")]
public void DeriveParametersWithCorrectSchemaResolution()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery("DROP SCHEMA IF EXISTS schema1, schema2 CASCADE; CREATE SCHEMA schema1; CREATE SCHEMA schema2;");
try
{
conn.ExecuteNonQuery(
@"
CREATE OR REPLACE FUNCTION schema1.redundantfunc() RETURNS int AS
$BODY$
BEGIN
RETURN 1;
END;
$BODY$
LANGUAGE 'plpgsql';
CREATE OR REPLACE FUNCTION schema2.redundantfunc(IN param1 INT, IN param2 INT) RETURNS int AS
$BODY$
BEGIN
RETURN param1 + param2;
END;
$BODY$
LANGUAGE 'plpgsql';
SET search_path TO schema2;
");
var command = new NpgsqlCommand("redundantfunc", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(command);
Assert.That(command.Parameters, Has.Count.EqualTo(2));
Assert.That(command.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(command.Parameters[1].Direction, Is.EqualTo(ParameterDirection.Input));
command.Parameters[0].Value = 5;
command.Parameters[1].Value = 4;
Assert.That(command.ExecuteScalar(), Is.EqualTo(9));
}
finally
{
if (conn.State == ConnectionState.Open)
conn.ExecuteNonQuery("DROP SCHEMA IF EXISTS schema1, schema2 CASCADE");
}
}
}
[Test, Description("Tests if function parameter derivation throws an exception if the specified function is not in the search_path")]
public void DeriveThrowsForExistingFunctionThatIsNotInSearchPath()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery("DROP SCHEMA IF EXISTS schema1 CASCADE; CREATE SCHEMA schema1;");
try
{
conn.ExecuteNonQuery(@"
CREATE OR REPLACE FUNCTION schema1.schema1func() RETURNS int AS
$BODY$
BEGIN
RETURN 1;
END;
$BODY$
LANGUAGE 'plpgsql';
RESET search_path;
");
var command = new NpgsqlCommand("schema1func", conn) { CommandType = CommandType.StoredProcedure };
Assert.That(() => NpgsqlCommandBuilder.DeriveParameters(command),
Throws.Exception.TypeOf<PostgresException>()
.With.Property(nameof(PostgresException.SqlState)).EqualTo("42883"));
}
finally
{
if (conn.State == ConnectionState.Open)
conn.ExecuteNonQuery("DROP SCHEMA IF EXISTS schema1 CASCADE");
}
}
}
[Test, Description("Tests if an exception is thrown if multiple functions with the specified name are in the search_path")]
public void DeriveThrowsForMultipleFunctionNameHitsInSearchPath()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery("DROP SCHEMA IF EXISTS schema1, schema2 CASCADE; CREATE SCHEMA schema1; CREATE SCHEMA schema2;");
try
{
conn.ExecuteNonQuery(
@"
CREATE OR REPLACE FUNCTION schema1.redundantfunc() RETURNS int AS
$BODY$
BEGIN
RETURN 1;
END;
$BODY$
LANGUAGE 'plpgsql';
CREATE OR REPLACE FUNCTION schema2.redundantfunc(IN param1 INT, IN param2 INT) RETURNS int AS
$BODY$
BEGIN
RETURN param1 + param2;
END;
$BODY$
LANGUAGE 'plpgsql';
SET search_path TO schema1, schema2;
");
var command = new NpgsqlCommand("redundantfunc", conn) { CommandType = CommandType.StoredProcedure };
Assert.That(() => NpgsqlCommandBuilder.DeriveParameters(command),
Throws.Exception.TypeOf<PostgresException>()
.With.Property(nameof(PostgresException.SqlState)).EqualTo("42725"));
}
finally
{
if (conn.State == ConnectionState.Open)
conn.ExecuteNonQuery("DROP SCHEMA IF EXISTS schema1, schema2 CASCADE");
}
}
}
#region Set returning functions
[Test, Description("Tests parameter derivation for a function that returns SETOF sometype")]
public void DeriveParametersFunctionReturningSetofType()
{
using (var conn = OpenConnection())
{
TestUtil.MinimumPgVersion(conn, "9.2.0");
// This function returns record because of the two Out (InOut & Out) parameters
conn.ExecuteNonQuery(@"
CREATE TABLE pg_temp.foo (fooid int, foosubid int, fooname text);
INSERT INTO pg_temp.foo VALUES
(1, 1, 'Joe'),
(1, 2, 'Ed'),
(2, 1, 'Mary');
CREATE FUNCTION pg_temp.getfoo(int) RETURNS SETOF foo AS $$
SELECT * FROM pg_temp.foo WHERE pg_temp.foo.fooid = $1 ORDER BY pg_temp.foo.foosubid;
$$ LANGUAGE SQL;
");
var cmd = new NpgsqlCommand("pg_temp.getfoo", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(4));
Assert.That(cmd.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(cmd.Parameters[1].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[2].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[3].Direction, Is.EqualTo(ParameterDirection.Output));
cmd.Parameters[0].Value = 1;
cmd.ExecuteNonQuery();
Assert.That(cmd.Parameters[0].Value, Is.EqualTo(1));
}
}
[Test, Description("Tests parameter derivation for a function that returns TABLE")]
public void DeriveParametersFunctionReturningTable()
{
using (var conn = OpenConnection())
{
TestUtil.MinimumPgVersion(conn, "9.2.0");
// This function returns record because of the two Out (InOut & Out) parameters
conn.ExecuteNonQuery(@"
CREATE TABLE pg_temp.foo (fooid int, foosubid int, fooname text);
INSERT INTO pg_temp.foo VALUES
(1, 1, 'Joe'),
(1, 2, 'Ed'),
(2, 1, 'Mary');
CREATE FUNCTION pg_temp.getfoo(int) RETURNS TABLE(fooid int, foosubid int, fooname text) AS $$
SELECT * FROM pg_temp.foo WHERE pg_temp.foo.fooid = $1 ORDER BY pg_temp.foo.foosubid;
$$ LANGUAGE SQL;
");
var cmd = new NpgsqlCommand("pg_temp.getfoo", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(4));
Assert.That(cmd.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(cmd.Parameters[1].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[2].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[3].Direction, Is.EqualTo(ParameterDirection.Output));
cmd.Parameters[0].Value = 1;
cmd.ExecuteNonQuery();
Assert.That(cmd.Parameters[0].Value, Is.EqualTo(1));
}
}
[Test, Description("Tests parameter derivation for a function that returns SETOF record")]
public void DeriveParametersFunctionReturningSetofRecord()
{
using (var conn = OpenConnection())
{
TestUtil.MinimumPgVersion(conn, "9.2.0");
// This function returns record because of the two Out (InOut & Out) parameters
conn.ExecuteNonQuery(@"
CREATE TABLE pg_temp.foo (fooid int, foosubid int, fooname text);
INSERT INTO pg_temp.foo VALUES
(1, 1, 'Joe'),
(1, 2, 'Ed'),
(2, 1, 'Mary');
CREATE FUNCTION pg_temp.getfoo(int, OUT fooid int, OUT foosubid int, OUT fooname text) RETURNS SETOF record AS $$
SELECT * FROM pg_temp.foo WHERE pg_temp.foo.fooid = $1 ORDER BY pg_temp.foo.foosubid;
$$ LANGUAGE SQL;
");
var cmd = new NpgsqlCommand("pg_temp.getfoo", conn) { CommandType = CommandType.StoredProcedure };
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(4));
Assert.That(cmd.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(cmd.Parameters[1].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[2].Direction, Is.EqualTo(ParameterDirection.Output));
Assert.That(cmd.Parameters[3].Direction, Is.EqualTo(ParameterDirection.Output));
cmd.Parameters[0].Value = 1;
cmd.ExecuteNonQuery();
Assert.That(cmd.Parameters[0].Value, Is.EqualTo(1));
}
}
#endregion
#region CommandType.Text
[Test, Description("Tests parameter derivation for parameterized queries (CommandType.Text)")]
public void DeriveParametersCommandTypeTextOneParameterWithSameType()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery("CREATE TEMP TABLE mytable(id int, val text);");
var cmd = new NpgsqlCommand(
@"INSERT INTO mytable VALUES(:x, 'some value');
UPDATE mytable SET val = 'changed value' WHERE id = :x;
SELECT val FROM mytable WHERE id = :x;",
conn);
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(1));
Assert.That(cmd.Parameters[0].Direction, Is.EqualTo(ParameterDirection.Input));
Assert.That(cmd.Parameters[0].ParameterName, Is.EqualTo("x"));
Assert.That(cmd.Parameters[0].NpgsqlDbType, Is.EqualTo(NpgsqlDbType.Integer));
cmd.Parameters[0].Value = 42;
var retVal = cmd.ExecuteScalar();
Assert.That(retVal, Is.EqualTo("changed value"));
}
}
[Test, Description("Tests parameter derivation for parameterized queries (CommandType.Text)")]
public void DeriveParametersCommandTypeTextOneParameterWithDifferentTypes()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery("CREATE TEMP TABLE mytable(id int, val text);");
var cmd = new NpgsqlCommand(
@"INSERT INTO mytable VALUES(:x, 'some value');
UPDATE mytable SET val = 'changed value' WHERE id = :x::double precision;
SELECT val FROM mytable WHERE id = :x::numeric;",
conn);
var ex = Assert.Throws<NpgsqlException>(() => NpgsqlCommandBuilder.DeriveParameters(cmd));
Assert.That(ex.Message, Is.EqualTo("The backend parser inferred different types for parameters with the same name. Please try explicit casting within your SQL statement or batch or use different placeholder names."));
}
}
[Test, Description("Tests parameter derivation for parameterized queries (CommandType.Text) with multiple parameters")]
public void DeriveParametersCommandTypeTextMultipleParameters()
{
using (var conn = OpenConnection())
{
conn.ExecuteNonQuery("CREATE TEMP TABLE mytable(id int, val text);");
var cmd = new NpgsqlCommand(
@"INSERT INTO mytable VALUES(:x, 'some value');
UPDATE mytable SET val = 'changed value' WHERE id = @y::double precision;
SELECT val FROM mytable WHERE id = :z::numeric;",
conn);
NpgsqlCommandBuilder.DeriveParameters(cmd);
Assert.That(cmd.Parameters, Has.Count.EqualTo(3));
Assert.That(cmd.Parameters[0].ParameterName, Is.EqualTo("x"));
Assert.That(cmd.Parameters[1].ParameterName, Is.EqualTo("y"));
Assert.That(cmd.Parameters[2].ParameterName, Is.EqualTo("z"));
Assert.That(cmd.Parameters[0].NpgsqlDbType, Is.EqualTo(NpgsqlDbType.Integer));
Assert.That(cmd.Parameters[1].NpgsqlDbType, Is.EqualTo(NpgsqlDbType.Double));
Assert.That(cmd.Parameters[2].NpgsqlDbType, Is.EqualTo(NpgsqlDbType.Numeric));
cmd.Parameters[0].Value = 42;
cmd.Parameters[1].Value = 42d;
cmd.Parameters[2].Value = 42;
var retVal = cmd.ExecuteScalar();
Assert.That(retVal, Is.EqualTo("changed value"));
}
}
[Test, Description("Tests parameter derivation a parameterized query (CommandType.Text) that is already prepared.")]
public void DeriveParametersForPreparedStatement()
{
const string query = "SELECT @p::integer";
const int answer = 42;
using (var conn = OpenConnection())
using (var cmd = new NpgsqlCommand(query, conn))
{
cmd.Parameters.AddWithValue("@p", NpgsqlDbType.Integer, answer);
cmd.Prepare();
Assert.That(conn.Connector.PreparedStatementManager.NumPrepared, Is.EqualTo(1));
var ex = Assert.Throws<NpgsqlException>(() =>
{
// Derive parameters for the already prepared statement
NpgsqlCommandBuilder.DeriveParameters(cmd);
});
Assert.That(ex.Message, Is.EqualTo("Deriving parameters isn't supported for commands that are already prepared."));
// We leave the command intact when throwing so it should still be useable
Assert.That(cmd.Parameters.Count, Is.EqualTo(1));
Assert.That(cmd.Parameters[0].ParameterName, Is.EqualTo("p"));
Assert.That(conn.Connector.PreparedStatementManager.NumPrepared, Is.EqualTo(1));
cmd.Parameters["@p"].Value = answer;
Assert.That(cmd.ExecuteScalar(), Is.EqualTo(answer));
conn.UnprepareAll();
}
}
#endregion
}
}
#endif