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// created on 27/12/2002 at 17:05
//
// Author:
// Francisco Figueiredo Jr. <fxjrlists@yahoo.com>
//
// Copyright (C) 2002 The Npgsql Development Team
// npgsql-general@gborg.postgresql.org
// http://gborg.postgresql.org/project/npgsql/projdisplay.php
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
using System;
using System.Data;
using System.Linq;
using System.Web.UI.WebControls;
using Npgsql;
using Npgsql.BackendMessages;
using NpgsqlTypes;
using NUnit.Framework;
using NUnit.Framework.Constraints;
namespace Npgsql.Tests
{
[TestFixture]
public class ReaderTests : TestBase
{
public ReaderTests(string backendVersion) : base(backendVersion) { }
[Test]
public void EmptyResultSet()
{
var cmd = new NpgsqlCommand("SELECT 1 WHERE FALSE", Conn);
var reader = cmd.ExecuteReader();
Assert.That(reader.Read(), Is.False);
Assert.That(reader.FieldCount, Is.EqualTo(1));
Assert.That(() => reader[0], Throws.Exception.TypeOf<InvalidOperationException>());
cmd.Dispose();
}
[Test]
public void FieldCount()
{
ExecuteNonQuery("CREATE TEMP TABLE data (int INTEGER)");
var cmd = new NpgsqlCommand("SELECT 1; SELECT 2,3", Conn);
var reader = cmd.ExecuteReader();
Assert.That(reader.FieldCount, Is.EqualTo(1));
Assert.That(reader.Read(), Is.True);
Assert.That(reader.FieldCount, Is.EqualTo(1));
Assert.That(reader.Read(), Is.False);
Assert.That(reader.FieldCount, Is.EqualTo(1));
Assert.That(reader.NextResult(), Is.True);
Assert.That(reader.FieldCount, Is.EqualTo(2));
Assert.That(reader.NextResult(), Is.False);
Assert.That(reader.FieldCount, Is.EqualTo(0));
reader.Close();
cmd.CommandText = "INSERT INTO data (int) VALUES (1)";
reader = cmd.ExecuteReader();
// Note MSDN docs that seem to say we should case -1 in this case: http://msdn.microsoft.com/en-us/library/system.data.idatarecord.fieldcount(v=vs.110).aspx
// But SqlClient returns 0
Assert.That(() => reader.FieldCount, Is.EqualTo(0));
cmd.Dispose();
}
[Test]
public void RecordsAffected()
{
ExecuteNonQuery("CREATE TEMP TABLE data (int INTEGER)");
var cmd = new NpgsqlCommand("INSERT INTO data (int) VALUES (7); INSERT INTO data (int) VALUES (8)", Conn);
var reader = cmd.ExecuteReader();
reader.Close();
Assert.That(reader.RecordsAffected, Is.EqualTo(2));
cmd = new NpgsqlCommand("SELECT * FROM data", Conn);
reader = cmd.ExecuteReader();
reader.Close();
Assert.That(reader.RecordsAffected, Is.EqualTo(-1));
cmd = new NpgsqlCommand("UPDATE data SET int=8", Conn);
reader = cmd.ExecuteReader();
reader.Close();
Assert.That(reader.RecordsAffected, Is.EqualTo(2));
cmd = new NpgsqlCommand("UPDATE data SET int=8 WHERE int=666", Conn);
reader = cmd.ExecuteReader();
reader.Close();
Assert.That(reader.RecordsAffected, Is.EqualTo(0));
}
[Test]
public void Statements()
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT) WITH OIDS");
using (var cmd = new NpgsqlCommand(
"INSERT INTO data (name) VALUES ('a');" +
"UPDATE data SET name='b' WHERE name='doesnt_exist'",
Conn)
)
using (var reader = cmd.ExecuteReader())
{
Assert.That(reader.Statements[0].SQL, Is.EqualTo("INSERT INTO data (name) VALUES ('a')"));
Assert.That(reader.Statements[0].StatementType, Is.EqualTo(StatementType.Insert));
Assert.That(reader.Statements[0].Rows, Is.EqualTo(1));
Assert.That(reader.Statements[0].OID, Is.Not.EqualTo(0));
Assert.That(reader.Statements[1].SQL, Is.EqualTo("UPDATE data SET name='b' WHERE name='doesnt_exist'"));
Assert.That(reader.Statements[1].StatementType, Is.EqualTo(StatementType.Update));
Assert.That(reader.Statements[1].Rows, Is.EqualTo(0));
Assert.That(reader.Statements[1].OID, Is.EqualTo(0));
}
using (var cmd = new NpgsqlCommand("SELECT name FROM data; DELETE FROM data", Conn))
using (var reader = cmd.ExecuteReader())
{
reader.NextResult(); // Consume SELECT result set
Assert.That(reader.Statements[0].SQL, Is.EqualTo("SELECT name FROM data"));
Assert.That(reader.Statements[0].StatementType, Is.EqualTo(StatementType.Select));
Assert.That(reader.Statements[0].Rows, Is.EqualTo(1));
Assert.That(reader.Statements[0].OID, Is.EqualTo(0));
Assert.That(reader.Statements[1].SQL, Is.EqualTo("DELETE FROM data"));
Assert.That(reader.Statements[1].StatementType, Is.EqualTo(StatementType.Delete));
Assert.That(reader.Statements[1].Rows, Is.EqualTo(1));
Assert.That(reader.Statements[1].OID, Is.EqualTo(0));
}
}
[Test]
public void GetStringWithParameter()
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
const string text = "Random text";
ExecuteNonQuery(String.Format(@"INSERT INTO data (name) VALUES ('{0}')", text));
var command = new NpgsqlCommand("SELECT name FROM data WHERE name = :value;", Conn);
var param = new NpgsqlParameter();
param.ParameterName = "value";
param.DbType = DbType.String;
//param.NpgsqlDbType = NpgsqlDbType.Text;
param.Size = text.Length;
param.Value = text;
command.Parameters.Add(param);
using (var dr = command.ExecuteReader())
{
dr.Read();
var result = dr.GetString(0);
Assert.AreEqual(text, result);
}
}
[Test]
public void GetStringWithQuoteWithParameter()
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
ExecuteNonQuery(@"INSERT INTO data (name) VALUES ('Text with '' single quote')");
const string test = "Text with ' single quote";
var command = new NpgsqlCommand("SELECT name FROM data WHERE name = :value;", Conn);
var param = new NpgsqlParameter();
param.ParameterName = "value";
param.DbType = DbType.String;
//param.NpgsqlDbType = NpgsqlDbType.Text;
param.Size = test.Length;
param.Value = test;
command.Parameters.Add(param);
using (var dr = command.ExecuteReader())
{
dr.Read();
var result = dr.GetString(0);
Assert.AreEqual(test, result);
}
}
[Test]
public void GetValueByName()
{
var command = new NpgsqlCommand(@"SELECT 'Random text' AS real_column", Conn);
var dr = command.ExecuteReader();
dr.Read();
Assert.That(dr["real_column"], Is.EqualTo("Random text"));
Assert.That(() => dr["non_existing"], Throws.Exception.TypeOf<IndexOutOfRangeException>());
command.Dispose();
}
[Test]
[IssueLink("https://github.com/npgsql/npgsql/issues/794")]
public void GetFieldType()
{
using (var cmd = new NpgsqlCommand(@"SELECT 1::INT4 AS some_column", Conn))
using (var reader = cmd.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetFieldType(0), Is.SameAs(typeof(int)));
}
using (var cmd = new NpgsqlCommand(@"SELECT 1::INT4 AS some_column", Conn))
{
cmd.AllResultTypesAreUnknown = true;
using (var reader = cmd.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetFieldType(0), Is.SameAs(typeof(string)));
}
}
}
[Test]
[IssueLink("https://github.com/npgsql/npgsql/issues/787")]
[IssueLink("https://github.com/npgsql/npgsql/issues/794")]
public void GetDataTypeName()
{
using (var command = new NpgsqlCommand(@"SELECT 1::INT4 AS some_column", Conn))
using (var reader = command.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetDataTypeName(0), Is.EqualTo("int4"));
}
using (var command = new NpgsqlCommand(@"SELECT '{1}'::INT4[] AS some_column", Conn))
using (var reader = command.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetDataTypeName(0), Is.EqualTo("_int4"));
}
using (var command = new NpgsqlCommand(@"SELECT 1::INT4 AS some_column", Conn))
{
command.AllResultTypesAreUnknown = true;
using (var reader = command.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetDataTypeName(0), Is.EqualTo("int4"));
}
}
}
[Test]
[IssueLink("https://github.com/npgsql/npgsql/issues/791")]
[IssueLink("https://github.com/npgsql/npgsql/issues/794")]
public void GetDataTypeOID()
{
var int4OID = ExecuteScalar("SELECT oid FROM pg_type WHERE typname = 'int4'");
using (var cmd = new NpgsqlCommand(@"SELECT 1::INT4 AS some_column", Conn))
using (var reader = cmd.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetDataTypeOID(0), Is.EqualTo(int4OID));
}
using (var cmd = new NpgsqlCommand(@"SELECT 1::INT4 AS some_column", Conn))
{
cmd.AllResultTypesAreUnknown = true;
using (var reader = cmd.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetDataTypeOID(0), Is.EqualTo(int4OID));
}
}
}
[Test]
public void GetName()
{
var command = new NpgsqlCommand(@"SELECT 1 AS some_column", Conn);
var dr = command.ExecuteReader();
dr.Read();
Assert.That(dr.GetName(0), Is.EqualTo("some_column"));
command.Dispose();
}
[Test]
public void GetOrdinal()
{
using (var command = new NpgsqlCommand(@"SELECT 0, 1 AS some_column WHERE 1=0", Conn))
using (var dr = command.ExecuteReader())
{
Assert.That(dr.GetOrdinal("some_column"), Is.EqualTo(1));
Assert.That(() => dr.GetOrdinal("doesn't_exist"), Throws.Exception.TypeOf<IndexOutOfRangeException>());
}
}
[Test]
public void GetFieldValueAsObject()
{
using (var cmd = new NpgsqlCommand("SELECT 'foo'::TEXT", Conn))
using (var reader = cmd.ExecuteReader())
{
reader.Read();
Assert.That(reader.GetFieldValue<object>(0), Is.EqualTo("foo"));
}
}
[Test]
public void GetValues()
{
var command = new NpgsqlCommand(@"SELECT 'hello', 1, '2014-01-01'::DATE", Conn);
var dr = command.ExecuteReader();
dr.Read();
var values = new object[4];
Assert.That(dr.GetValues(values), Is.EqualTo(3));
Assert.That(values, Is.EqualTo(new object[] { "hello", 1, new DateTime(2014, 1, 1), null }));
values = new object[2];
Assert.That(dr.GetValues(values), Is.EqualTo(2));
Assert.That(values, Is.EqualTo(new object[] { "hello", 1 }));
command.Dispose();
}
[Test]
public void GetProviderSpecificValues()
{
var command = new NpgsqlCommand(@"SELECT 'hello', 1, '2014-01-01'::DATE", Conn);
var dr = command.ExecuteReader();
dr.Read();
var values = new object[4];
Assert.That(dr.GetProviderSpecificValues(values), Is.EqualTo(3));
Assert.That(values, Is.EqualTo(new object[] { "hello", 1, new NpgsqlDate(2014, 1, 1), null }));
values = new object[2];
Assert.That(dr.GetProviderSpecificValues(values), Is.EqualTo(2));
Assert.That(values, Is.EqualTo(new object[] { "hello", 1 }));
command.Dispose();
}
[Test]
public void ExecuteReaderGettingEmptyResultSetWithOutputParameter()
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
var command = new NpgsqlCommand("SELECT * FROM data WHERE name = NULL;", Conn);
var param = new NpgsqlParameter("some_param", NpgsqlDbType.Varchar);
param.Direction = ParameterDirection.Output;
command.Parameters.Add(param);
using (NpgsqlDataReader dr = command.ExecuteReader())
{
Assert.IsFalse(dr.NextResult());
}
}
[Test]
[ExpectedException(typeof(InvalidOperationException))]
public void GetValueFromEmptyResultset()
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
var command = new NpgsqlCommand("SELECT * FROM data WHERE name = :value;", Conn);
const string test = "Text single quote";
var param = new NpgsqlParameter();
param.ParameterName = "value";
param.DbType = DbType.String;
//param.NpgsqlDbType = NpgsqlDbType.Text;
param.Size = test.Length;
param.Value = test;
command.Parameters.Add(param);
using (var dr = command.ExecuteReader())
{
dr.Read();
// This line should throw the invalid operation exception as the datareader will
// have an empty resultset.
Console.WriteLine(dr.IsDBNull(1));
}
}
[Test]
public void NonExistentParameterName()
{
var cmd = new NpgsqlCommand("SELECT @x::TEXT", Conn);
Assert.That(() => cmd.ExecuteReader(), Throws.Exception);
}
[Test]
public void UseDataAdapter()
{
var command = new NpgsqlCommand("SELECT 1", Conn);
var da = new NpgsqlDataAdapter();
da.SelectCommand = command;
var ds = new DataSet();
da.Fill(ds);
//ds.WriteXml("TestUseDataAdapter.xml");
}
[Test]
public void UseDataAdapterNpgsqlConnectionConstructor()
{
var command = new NpgsqlCommand("SELECT 1", Conn);
command.Connection = Conn;
var da = new NpgsqlDataAdapter(command);
var ds = new DataSet();
da.Fill(ds);
//ds.WriteXml("TestUseDataAdapterNpgsqlConnectionConstructor.xml");
}
[Test]
public void UseDataAdapterStringNpgsqlConnectionConstructor()
{
var da = new NpgsqlDataAdapter("SELECT 1", Conn);
var ds = new DataSet();
da.Fill(ds);
//ds.WriteXml("TestUseDataAdapterStringNpgsqlConnectionConstructor.xml");
}
[Test]
public void UseDataAdapterStringStringConstructor()
{
var da = new NpgsqlDataAdapter("SELECT 1", ConnectionString);
var ds = new DataSet();
da.Fill(ds);
ds.WriteXml("TestUseDataAdapterStringStringConstructor.xml");
}
[Test]
public void UseDataAdapterStringStringConstructor2()
{
var da = new NpgsqlDataAdapter("SELECT 1", ConnectionString);
var ds = new DataSet();
da.Fill(ds);
ds.WriteXml("TestUseDataAdapterStringStringConstructor2.xml");
}
[Test]
public void DataGridWebControlSupport()
{
var command = new NpgsqlCommand("SELECT 1", Conn);
var dr = command.ExecuteReader();
//Console.WriteLine(dr.FieldCount);
var dg = new DataGrid();
dg.DataSource = dr;
dg.DataBind();
}
[Test]
[ExpectedException(typeof(InvalidOperationException))]
public void ReadPastDataReaderEnd()
{
var command = new NpgsqlCommand("SELECT 1", Conn);
var dr = command.ExecuteReader();
while (dr.Read()) {}
Object o = dr[0];
Assert.IsNotNull(o);
}
[Test]
public void SchemaOnly([Values(PrepareOrNot.NotPrepared, PrepareOrNot.Prepared)] PrepareOrNot prepare)
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
var cmd = new NpgsqlCommand(
"SELECT 1 AS some_column;" +
"UPDATE data SET name='yo' WHERE 1=0;" +
"SELECT 1 AS some_other_column",
Conn);
if (prepare == PrepareOrNot.Prepared)
cmd.Prepare();
var reader = cmd.ExecuteReader(CommandBehavior.SchemaOnly);
Assert.That(reader.Read(), Is.False);
var t = reader.GetSchemaTable();
Assert.That(t.Rows[0]["ColumnName"], Is.EqualTo("some_column"));
Assert.That(reader.NextResult(), Is.True);
Assert.That(reader.Read(), Is.False);
t = reader.GetSchemaTable();
Assert.That(t.Rows[0]["ColumnName"], Is.EqualTo("some_other_column"));
Assert.That(reader.NextResult(), Is.False);
reader.Close();
cmd.Dispose();
}
[Test]
public void SingleResult()
{
var cmd = new NpgsqlCommand(@"SELECT 1; SELECT 2", Conn);
var rdr = cmd.ExecuteReader(CommandBehavior.SingleResult);
Assert.That(rdr.Read(), Is.True);
Assert.That(rdr.GetInt32(0), Is.EqualTo(1));
Assert.That(rdr.NextResult(), Is.False);
rdr.Close();
}
[Test]
public void SingleRowCommandBehaviorSupport()
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
ExecuteNonQuery(@"INSERT INTO data (name) VALUES ('X')");
ExecuteNonQuery(@"INSERT INTO data (name) VALUES ('Y')");
var command = new NpgsqlCommand(@"SELECT * FROM data", Conn);
var reader = command.ExecuteReader(CommandBehavior.SingleRow);
Assert.That(reader.Read(), Is.True);
Assert.That(reader.Read(), Is.False);
reader.Close();
command.Dispose();
}
[Test, Description("In sequential access, performing a null check on a non-first field would check the first field")]
public void SequentialNullCheckOnNonFirstField()
{
using (var cmd = new NpgsqlCommand("SELECT 'X', NULL", Conn))
using (var dr = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
{
dr.Read();
Assert.That(dr.IsDBNull(1), Is.True);
}
}
#region GetSchemaTable
[Test]
public void PrimaryKeyFieldsMetadataSupport()
{
ExecuteNonQuery("DROP TABLE IF EXISTS DATA2 CASCADE");
ExecuteNonQuery(@"CREATE TEMP TABLE DATA2 (
field_pk1 INT2 NOT NULL,
field_pk2 INT2 NOT NULL,
field_serial SERIAL,
CONSTRAINT data2_pkey PRIMARY KEY (field_pk1, field_pk2)
) WITH OIDS");
using (var command = new NpgsqlCommand("SELECT * FROM DATA2", Conn))
{
using (var dr = command.ExecuteReader(CommandBehavior.KeyInfo))
{
dr.Read();
var keyColumns = dr.GetSchemaTable().Rows.Cast<DataRow>().Where(r => (bool)r["IsKey"]).ToArray();
Assert.That(keyColumns, Has.Length.EqualTo(2));
Assert.That(keyColumns.Count(c => (string)c["ColumnName"] == "field_pk1"), Is.EqualTo(1));
Assert.That(keyColumns.Count(c => (string)c["ColumnName"] == "field_pk2"), Is.EqualTo(1));
}
}
}
[Test]
public void PrimaryKeyFieldMetadataSupport()
{
ExecuteNonQuery("CREATE TEMP TABLE data (id SERIAL PRIMARY KEY, serial SERIAL)");
using (var command = new NpgsqlCommand("SELECT * FROM data", Conn))
{
using (var dr = command.ExecuteReader(CommandBehavior.KeyInfo))
{
dr.Read();
var metadata = dr.GetSchemaTable();
var key = metadata.Rows.Cast<DataRow>().Single(r => (bool) r["IsKey"]);
Assert.That(key["ColumnName"], Is.EqualTo("id"));
}
}
}
[Test]
public void IsAutoIncrementMetadataSupport()
{
ExecuteNonQuery("CREATE TEMP TABLE data (id SERIAL PRIMARY KEY)");
var command = new NpgsqlCommand("SELECT * FROM data", Conn);
using (var dr = command.ExecuteReader(CommandBehavior.KeyInfo))
{
var metadata = dr.GetSchemaTable();
Assert.That(metadata.Rows.Cast<DataRow>()
.Where(r => ((string)r["ColumnName"]).Contains("serial"))
.All(r => (bool)r["IsAutoIncrement"]));
}
}
[Test]
public void IsReadOnlyMetadataSupport()
{
ExecuteNonQuery("CREATE TEMP TABLE data (id SERIAL PRIMARY KEY, int2 SMALLINT)");
ExecuteNonQuery("CREATE OR REPLACE TEMPORARY VIEW DataView (id, int2) AS SELECT id, int2 + int2 AS int2 FROM data");
var command = new NpgsqlCommand("SELECT * FROM DataView", Conn);
using (var dr = command.ExecuteReader(CommandBehavior.KeyInfo))
{
var metadata = dr.GetSchemaTable();
foreach (DataRow r in metadata.Rows)
{
switch ((string)r["ColumnName"])
{
case "field_pk":
if (Conn.PostgreSqlVersion < new Version("9.4"))
{
// 9.3 and earlier: IsUpdatable = False
Assert.IsTrue((bool)r["IsReadonly"], "field_pk");
}
else
{
// 9.4: IsUpdatable = True
Assert.IsFalse((bool)r["IsReadonly"], "field_pk");
}
break;
case "field_int2":
Assert.IsTrue((bool)r["IsReadonly"]);
break;
default:
break;
}
}
}
}
#endregion
[Test]
public void SchemaOnlySingleRowCommandBehaviorSupport()
{
var command = new NpgsqlCommand("SELECT 1", Conn);
using (var dr = command.ExecuteReader(CommandBehavior.SchemaOnly | CommandBehavior.SingleRow))
{
var i = 0;
while (dr.Read())
i++;
Assert.AreEqual(0, i);
}
}
[Test]
public void SchemaOnlyCommandBehaviorSupport()
{
var command = new NpgsqlCommand("SELECT 1", Conn);
using (var dr = command.ExecuteReader(CommandBehavior.SchemaOnly))
{
var i = 0;
while (dr.Read())
i++;
Assert.AreEqual(0, i);
}
}
[Test]
public void SchemaOnlyCommandBehaviorSupportFunctioncall()
{
ExecuteNonQuery(@"CREATE OR REPLACE FUNCTION funcB() RETURNS SETOF integer as '
SELECT 1;
' LANGUAGE 'sql';");
var command = new NpgsqlCommand("funcb", Conn);
command.CommandType = CommandType.StoredProcedure;
using (var dr = command.ExecuteReader(CommandBehavior.SchemaOnly))
{
var i = 0;
while (dr.Read())
i++;
Assert.AreEqual(0, i);
}
}
[Test]
public void FieldNameKanaWidthWideRequestForNarrowFieldName()
{//Should ignore Kana width and hence find the first of these two fields
var command = new NpgsqlCommand("select 123 as ｦｧｨｩｪｫｬ, 124 as ヲァィゥェォャ", Conn);
using (var dr = command.ExecuteReader())
{
dr.Read();
Assert.AreEqual(dr["ｦｧｨｩｪｫｬ"], 123);
Assert.AreEqual(dr["ヲァィゥェォャ"], 123);// Wide version.
}
}
[Test]
public void FieldNameKanaWidthNarrowRequestForWideFieldName()
{//Should ignore Kana width and hence find the first of these two fields
var command = new NpgsqlCommand("select 123 as ヲァィゥェォャ, 124 as ｦｧｨｩｪｫｬ", Conn);
using (var dr = command.ExecuteReader())
{
dr.Read();
Assert.AreEqual(dr["ヲァィゥェォャ"], 123);
Assert.AreEqual(dr["ｦｧｨｩｪｫｬ"], 123);// Narrow version.
}
}
[Test]
public void FieldIndexDoesntExist()
{
using (var command = new NpgsqlCommand("SELECT 1", Conn))
using (var dr = command.ExecuteReader())
{
dr.Read();
Assert.That(() => dr[5], Throws.Exception.TypeOf<IndexOutOfRangeException>());
}
}
[Test, Description("Performs some operations while a reader is still open and checks for exceptions")]
public void ReaderIsStillOpen()
{
using (var cmd1 = new NpgsqlCommand("SELECT 1", Conn))
using (var reader1 = cmd1.ExecuteReader())
{
Assert.That(() => ExecuteNonQuery("SELECT 1"), Throws.Exception.TypeOf<InvalidOperationException>());
Assert.That(() => ExecuteScalar("SELECT 1"), Throws.Exception.TypeOf<InvalidOperationException>());
using (var cmd2 = new NpgsqlCommand("SELECT 2", Conn))
{
Assert.That(() => cmd2.ExecuteReader(), Throws.Exception.TypeOf<InvalidOperationException>());
Assert.That(() => cmd2.Prepare(), Throws.Exception.TypeOf<InvalidOperationException>());
}
}
}
[Test]
public void LoadDataTable()
{
ExecuteNonQuery("CREATE TEMP TABLE data (char5 CHAR(5), varchar5 VARCHAR(5))");
using (var command = new NpgsqlCommand("SELECT char5, varchar5 FROM data", Conn))
using (var dr = command.ExecuteReader())
{
var dt = new DataTable();
dt.Load(dr);
dr.Close();
Assert.AreEqual(5, dt.Columns[0].MaxLength);
Assert.AreEqual(5, dt.Columns[1].MaxLength);
}
}
[Test]
public void CleansupOkWithDisposeCalls()
{
var command = new NpgsqlCommand("SELECT 1", Conn);
using (var dr = command.ExecuteReader())
{
dr.Read();
dr.Close();
using (var upd = Conn.CreateCommand())
{
upd.CommandText = "SELECT 1";
upd.Prepare();
}
}
}
[Test]
public void Null()
{
using (var cmd = new NpgsqlCommand("SELECT @p::TEXT", Conn))
{
cmd.Parameters.Add(new NpgsqlParameter("p", DbType.String) { Value = DBNull.Value });
using (var reader = cmd.ExecuteReader())
{
reader.Read();
Assert.That(reader.IsDBNull(0), Is.True);
Assert.That(reader.IsDBNullAsync(0).Result, Is.True);
Assert.That(reader.GetValue(0), Is.EqualTo(DBNull.Value));
Assert.That(reader.GetProviderSpecificValue(0), Is.EqualTo(DBNull.Value));
Assert.That(() => reader.GetString(0), Throws.Exception.TypeOf<InvalidCastException>());
}
}
}
[Test]
[IssueLink("https://github.com/npgsql/npgsql/issues/742")]
[IssueLink("https://github.com/npgsql/npgsql/issues/800")]
public void HasRows([Values(PrepareOrNot.NotPrepared, PrepareOrNot.Prepared)] PrepareOrNot prepare)
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
var command = new NpgsqlCommand("SELECT 1; SELECT * FROM data WHERE name='does_not_exist'", Conn);
if (prepare == PrepareOrNot.Prepared)
command.Prepare();
using (var dr = command.ExecuteReader())
{
Assert.That(dr.HasRows, Is.True);
Assert.That(dr.HasRows, Is.True);
Assert.That(dr.Read(), Is.True);
Assert.That(dr.HasRows, Is.True);
Assert.That(dr.Read(), Is.False);
dr.NextResult();
Assert.That(dr.HasRows, Is.False);
}
}
[Test]
public void HasRowsWithoutResultset()
{
ExecuteNonQuery("CREATE TEMP TABLE data (name TEXT)");
var command = new NpgsqlCommand("DELETE FROM data WHERE name = 'unknown'", Conn);
var dr = command.ExecuteReader();
Assert.IsFalse(dr.HasRows);
}
[Test]
public void IntervalAsTimeSpan()
{
var command = new NpgsqlCommand();
command.CommandType = CommandType.Text;
command.CommandText = "SELECT CAST('1 hour' AS interval) AS dauer";
command.Connection = Conn;
using (var dr = command.ExecuteReader())
{
Assert.IsTrue(dr.HasRows);
Assert.IsTrue(dr.Read());
Assert.IsTrue(dr.HasRows);
var ts = dr.GetTimeSpan(0);
}
}
[Test]
public void SequentialConsumeWithNull()
{
var command = new NpgsqlCommand("SELECT 1, NULL", Conn);
var reader = command.ExecuteReader(CommandBehavior.SequentialAccess);
reader.Read();
reader.Close();
command.Dispose();
}
[Test]
public void CloseConnectionInMiddleOfRow()
{
using (var conn = new NpgsqlConnection(ConnectionString))
{
conn.Open();
var cmd = new NpgsqlCommand("SELECT 1, 2", conn);
var reader = cmd.ExecuteReader();
reader.Read();
Console.WriteLine(reader.GetInt32(0));
}
}
[Test]
public void Crap()
{
}
#if DEBUG
[Test, Description("Tests that everything goes well when a type handler generates a SafeReadException")]
[Timeout(5000)]
public void SafeReadException()
{
// Temporarily reroute integer to go to a type handler which generates SafeReadExceptions
var registry = Conn.Connector.TypeHandlerRegistry;
var intHandler = registry[typeof(int)];
registry.OIDIndex[intHandler.OID] = new SafeExceptionGeneratingHandler();
try
{
using (var cmd = new NpgsqlCommand(@"SELECT 1, 'hello'", Conn))
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
{
reader.Read();
Assert.That(() => reader.GetInt32(0),
Throws.Exception.With.Message.EqualTo("Safe read exception as requested"));
Assert.That(reader.GetString(1), Is.EqualTo("hello"));
}
}
finally
{
registry.OIDIndex[intHandler.OID] = intHandler;
}
}
[Test, Description("Tests that when a type handler generates an exception that isn't a SafeReadException, the connection is properly broken")]
[Timeout(5000)]
public void NonSafeReadException()
{
// Temporarily reroute integer to go to a type handler which generates some exception
var registry = Conn.Connector.TypeHandlerRegistry;
var intHandler = registry[typeof(int)];
registry.OIDIndex[intHandler.OID] = new NonSafeExceptionGeneratingHandler();
try {
using (var cmd = new NpgsqlCommand(@"SELECT 1, 'hello'", Conn))
using (var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess)) {
reader.Read();
Assert.That(() => reader.GetInt32(0),
Throws.Exception.With.Message.EqualTo("Non-safe read exception as requested"));
Assert.That(Conn.FullState, Is.EqualTo(ConnectionState.Broken));
Assert.That(Conn.State, Is.EqualTo(ConnectionState.Closed));
}
} finally {
registry.OIDIndex[intHandler.OID] = intHandler;
}
}
#endif
}
#region Mock Type Handlers
#if DEBUG
internal class SafeExceptionGeneratingHandler : TypeHandler<int>, ISimpleTypeReader<int>, ISimpleTypeWriter
{
public int Read(NpgsqlBuffer buf, int len, FieldDescription fieldDescription)
{
buf.ReadInt32();
throw new SafeReadException(new Exception("Safe read exception as requested"));
}
public int ValidateAndGetLength(object value, NpgsqlParameter parameter) { throw new NotSupportedException(); }
public void Write(object value, NpgsqlBuffer buf, NpgsqlParameter parameter) { throw new NotSupportedException(); }
}
internal class NonSafeExceptionGeneratingHandler : TypeHandler<int>, ISimpleTypeReader<int>, ISimpleTypeWriter
{
public int Read(NpgsqlBuffer buf, int len, FieldDescription fieldDescription)
{
throw new Exception("Non-safe read exception as requested");
}
public int ValidateAndGetLength(object value, NpgsqlParameter parameter) { throw new NotSupportedException(); }
public void Write(object value, NpgsqlBuffer buf, NpgsqlParameter parameter) { throw new NotSupportedException();}
}
#endif
#endregion
}