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using System;
using System.Data;
using System.Threading.Tasks;
using NpgsqlTypes;
using NUnit.Framework;
using static Npgsql.Tests.TestUtil;
namespace Npgsql.Tests;
public class DataAdapterTests : TestBase
{
[Test]
public async Task DataAdapter_SelectCommand()
{
using var conn = await OpenConnectionAsync();
using 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 async Task DataAdapter_NpgsqlCommand_in_constructor()
{
using var conn = await OpenConnectionAsync();
using 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 async Task DataAdapter_string_command_in_constructor()
{
using var conn = await OpenConnectionAsync();
var da = new NpgsqlDataAdapter("SELECT 1", conn);
var ds = new DataSet();
da.Fill(ds);
//ds.WriteXml("TestUseDataAdapterStringNpgsqlConnectionConstructor.xml");
}
[Test]
public void DataAdapter_connection_string_in_constructor()
{
var da = new NpgsqlDataAdapter("SELECT 1", ConnectionString);
var ds = new DataSet();
da.Fill(ds);
//ds.WriteXml("TestUseDataAdapterStringStringConstructor.xml");
}
[Test]
public async Task Insert_with_DataSet()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"SELECT * FROM {table}", conn);
da.InsertCommand = new NpgsqlCommand($"INSERT INTO {table} (field_int2, field_timestamp, field_numeric) VALUES (:a, :b, :c)", conn);
da.InsertCommand.Parameters.Add(new NpgsqlParameter("a", DbType.Int16));
da.InsertCommand.Parameters.Add(new NpgsqlParameter("b", DbType.DateTime2));
da.InsertCommand.Parameters.Add(new NpgsqlParameter("c", DbType.Decimal));
da.InsertCommand.Parameters[0].Direction = ParameterDirection.Input;
da.InsertCommand.Parameters[1].Direction = ParameterDirection.Input;
da.InsertCommand.Parameters[2].Direction = ParameterDirection.Input;
da.InsertCommand.Parameters[0].SourceColumn = "field_int2";
da.InsertCommand.Parameters[1].SourceColumn = "field_timestamp";
da.InsertCommand.Parameters[2].SourceColumn = "field_numeric";
da.Fill(ds);
var dt = ds.Tables[0];
var dr = dt.NewRow();
dr["field_int2"] = 4;
dr["field_timestamp"] = new DateTime(2003, 01, 30, 14, 0, 0);
dr["field_numeric"] = 7.3M;
dt.Rows.Add(dr);
var ds2 = ds.GetChanges()!;
da.Update(ds2);
ds.Merge(ds2);
ds.AcceptChanges();
var dr2 = new NpgsqlCommand($"SELECT field_int2, field_numeric, field_timestamp FROM {table}", conn).ExecuteReader();
dr2.Read();
Assert.That(dr2[0], Is.EqualTo(4));
Assert.That(dr2[1], Is.EqualTo(7.3000000M));
dr2.Close();
}
[Test]
public async Task DataAdapter_update_return_value()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"SELECT * FROM {table}", conn);
da.InsertCommand = new NpgsqlCommand($@"INSERT INTO {table} (field_int2, field_timestamp, field_numeric) VALUES (:a, :b, :c)", conn);
da.InsertCommand.Parameters.Add(new NpgsqlParameter("a", DbType.Int16));
da.InsertCommand.Parameters.Add(new NpgsqlParameter("b", DbType.DateTime2));
da.InsertCommand.Parameters.Add(new NpgsqlParameter("c", DbType.Decimal));
da.InsertCommand.Parameters[0].Direction = ParameterDirection.Input;
da.InsertCommand.Parameters[1].Direction = ParameterDirection.Input;
da.InsertCommand.Parameters[2].Direction = ParameterDirection.Input;
da.InsertCommand.Parameters[0].SourceColumn = "field_int2";
da.InsertCommand.Parameters[1].SourceColumn = "field_timestamp";
da.InsertCommand.Parameters[2].SourceColumn = "field_numeric";
da.Fill(ds);
var dt = ds.Tables[0];
var dr = dt.NewRow();
dr["field_int2"] = 4;
dr["field_timestamp"] = new DateTime(2003, 01, 30, 14, 0, 0);
dr["field_numeric"] = 7.3M;
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["field_int2"] = 4;
dr["field_timestamp"] = new DateTime(2003, 01, 30, 14, 0, 0);
dr["field_numeric"] = 7.3M;
dt.Rows.Add(dr);
var ds2 = ds.GetChanges()!;
var daupdate = da.Update(ds2);
Assert.That(daupdate, Is.EqualTo(2));
}
[Test]
public async Task DataAdapter_update_return_value2()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var cmd = conn.CreateCommand();
var da = new NpgsqlDataAdapter($"select * from {table}", conn);
var cb = new NpgsqlCommandBuilder(da);
var ds = new DataSet();
da.Fill(ds);
//## Insert a new row with id = 1
ds.Tables[0].Rows.Add(0.4, 0.5);
da.Update(ds);
//## change id from 1 to 2
cmd.CommandText = $"update {table} set field_numeric = 0.8";
cmd.ExecuteNonQuery();
//## change value to newvalue
ds.Tables[0].Rows[0][1] = 0.7;
//## update should fail, and make a DBConcurrencyException
var count = da.Update(ds);
//## count is 1, even if the row isn't updated in the database
Assert.That(count, Is.EqualTo(1));
}
[Test]
public async Task Fill_with_empty_resultset()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"SELECT field_serial, field_int2, field_timestamp, field_numeric FROM {table} WHERE field_serial = -1", conn);
da.Fill(ds);
Assert.That(ds.Tables.Count, Is.EqualTo(1));
Assert.That(ds.Tables[0].Columns.Count, Is.EqualTo(4));
Assert.That(ds.Tables[0].Columns[0].ColumnName, Is.EqualTo("field_serial"));
Assert.That(ds.Tables[0].Columns[1].ColumnName, Is.EqualTo("field_int2"));
Assert.That(ds.Tables[0].Columns[2].ColumnName, Is.EqualTo("field_timestamp"));
Assert.That(ds.Tables[0].Columns[3].ColumnName, Is.EqualTo("field_numeric"));
}
[Test]
public async Task Fill_add_with_key()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"select field_serial, field_int2, field_timestamp, field_numeric from {table}", conn);
da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
da.Fill(ds);
var field_serial = ds.Tables[0].Columns[0];
var field_int2 = ds.Tables[0].Columns[1];
var field_timestamp = ds.Tables[0].Columns[2];
var field_numeric = ds.Tables[0].Columns[3];
Assert.That(field_serial.AllowDBNull, Is.False);
Assert.That(field_serial.AutoIncrement);
Assert.That(field_serial.ColumnName, Is.EqualTo("field_serial"));
Assert.That(field_serial.DataType, Is.EqualTo(typeof(int)));
Assert.That(field_serial.Ordinal, Is.EqualTo(0));
Assert.That(field_serial.Unique, Is.False);
Assert.That(field_int2.AllowDBNull);
Assert.That(field_int2.AutoIncrement, Is.False);
Assert.That(field_int2.ColumnName, Is.EqualTo("field_int2"));
Assert.That(field_int2.DataType, Is.EqualTo(typeof(short)));
Assert.That(field_int2.Ordinal, Is.EqualTo(1));
Assert.That(field_int2.Unique, Is.False);
Assert.That(field_timestamp.AllowDBNull);
Assert.That(field_timestamp.AutoIncrement, Is.False);
Assert.That(field_timestamp.ColumnName, Is.EqualTo("field_timestamp"));
Assert.That(field_timestamp.DataType, Is.EqualTo(typeof(DateTime)));
Assert.That(field_timestamp.Ordinal, Is.EqualTo(2));
Assert.That(field_timestamp.Unique, Is.False);
Assert.That(field_numeric.AllowDBNull);
Assert.That(field_numeric.AutoIncrement, Is.False);
Assert.That(field_numeric.ColumnName, Is.EqualTo("field_numeric"));
Assert.That(field_numeric.DataType, Is.EqualTo(typeof(decimal)));
Assert.That(field_numeric.Ordinal, Is.EqualTo(3));
Assert.That(field_numeric.Unique, Is.False);
}
[Test]
public async Task Fill_add_columns()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"SELECT field_serial, field_int2, field_timestamp, field_numeric FROM {table}", conn);
da.MissingSchemaAction = MissingSchemaAction.Add;
da.Fill(ds);
var field_serial = ds.Tables[0].Columns[0];
var field_int2 = ds.Tables[0].Columns[1];
var field_timestamp = ds.Tables[0].Columns[2];
var field_numeric = ds.Tables[0].Columns[3];
Assert.That(field_serial.ColumnName, Is.EqualTo("field_serial"));
Assert.That(field_serial.DataType, Is.EqualTo(typeof(int)));
Assert.That(field_serial.Ordinal, Is.EqualTo(0));
Assert.That(field_int2.ColumnName, Is.EqualTo("field_int2"));
Assert.That(field_int2.DataType, Is.EqualTo(typeof(short)));
Assert.That(field_int2.Ordinal, Is.EqualTo(1));
Assert.That(field_timestamp.ColumnName, Is.EqualTo("field_timestamp"));
Assert.That(field_timestamp.DataType, Is.EqualTo(typeof(DateTime)));
Assert.That(field_timestamp.Ordinal, Is.EqualTo(2));
Assert.That(field_numeric.ColumnName, Is.EqualTo("field_numeric"));
Assert.That(field_numeric.DataType, Is.EqualTo(typeof(decimal)));
Assert.That(field_numeric.Ordinal, Is.EqualTo(3));
}
[Test]
public async Task Update_letting_null_field_falue()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var command = new NpgsqlCommand($"INSERT INTO {table} (field_int2) VALUES (2)", conn);
command.ExecuteNonQuery();
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"SELECT * FROM {table}", conn);
da.InsertCommand = new NpgsqlCommand(";", conn);
da.UpdateCommand = new NpgsqlCommand($"UPDATE {table} SET field_int2 = :a, field_timestamp = :b, field_numeric = :c WHERE field_serial = :d", conn);
da.UpdateCommand.Parameters.Add(new NpgsqlParameter("a", DbType.Int16));
da.UpdateCommand.Parameters.Add(new NpgsqlParameter("b", DbType.DateTime));
da.UpdateCommand.Parameters.Add(new NpgsqlParameter("c", DbType.Decimal));
da.UpdateCommand.Parameters.Add(new NpgsqlParameter("d", NpgsqlDbType.Bigint));
da.UpdateCommand.Parameters[0].Direction = ParameterDirection.Input;
da.UpdateCommand.Parameters[1].Direction = ParameterDirection.Input;
da.UpdateCommand.Parameters[2].Direction = ParameterDirection.Input;
da.UpdateCommand.Parameters[3].Direction = ParameterDirection.Input;
da.UpdateCommand.Parameters[0].SourceColumn = "field_int2";
da.UpdateCommand.Parameters[1].SourceColumn = "field_timestamp";
da.UpdateCommand.Parameters[2].SourceColumn = "field_numeric";
da.UpdateCommand.Parameters[3].SourceColumn = "field_serial";
da.Fill(ds);
var dt = ds.Tables[0];
Assert.That(dt, Is.Not.Null);
var dr = ds.Tables[0].Rows[^1];
dr["field_int2"] = 4;
var ds2 = ds.GetChanges()!;
da.Update(ds2);
ds.Merge(ds2);
ds.AcceptChanges();
using var dr2 = new NpgsqlCommand($"SELECT field_int2 FROM {table}", conn).ExecuteReader();
dr2.Read();
Assert.That(dr2["field_int2"], Is.EqualTo(4));
}
[Test]
public async Task Fill_with_duplicate_column_name()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"SELECT field_serial, field_serial FROM {table}", conn);
da.Fill(ds);
}
[Test]
public Task Update_with_DataSet() => DoUpdateWithDataSet();
public async Task DoUpdateWithDataSet()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var command = new NpgsqlCommand($"insert into {table} (field_int2) values (2)", conn);
command.ExecuteNonQuery();
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"select * from {table}", conn);
var cb = new NpgsqlCommandBuilder(da);
Assert.That(cb, Is.Not.Null);
da.Fill(ds);
var dt = ds.Tables[0];
Assert.That(dt, Is.Not.Null);
var dr = ds.Tables[0].Rows[^1];
dr["field_int2"] = 4;
var ds2 = ds.GetChanges()!;
da.Update(ds2);
ds.Merge(ds2);
ds.AcceptChanges();
using var dr2 = new NpgsqlCommand($"select * from {table}", conn).ExecuteReader();
dr2.Read();
Assert.That(dr2["field_int2"], Is.EqualTo(4));
}
[Test]
public async Task Insert_with_CommandBuilder_case_sensitive()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var ds = new DataSet();
var da = new NpgsqlDataAdapter($"select * from {table}", conn);
var builder = new NpgsqlCommandBuilder(da);
Assert.That(builder, Is.Not.Null);
da.Fill(ds);
var dt = ds.Tables[0];
var dr = dt.NewRow();
dr["Field_int4"] = 4;
dt.Rows.Add(dr);
var ds2 = ds.GetChanges()!;
da.Update(ds2);
ds.Merge(ds2);
ds.AcceptChanges();
using var dr2 = new NpgsqlCommand($"select * from {table}", conn).ExecuteReader();
dr2.Read();
Assert.That(dr2["field_int4"], Is.EqualTo(4));
}
[Test]
public async Task Interval_as_TimeSpan()
{
using var conn = await OpenConnectionAsync();
var table = await GetTempTableName(conn);
await conn.ExecuteNonQueryAsync($@"
CREATE TABLE {table} (
pk SERIAL PRIMARY KEY,
interval INTERVAL
);
INSERT INTO {table} (interval) VALUES ('1 hour'::INTERVAL);");
var dt = new DataTable("data");
var command = new NpgsqlCommand
{
CommandType = CommandType.Text,
CommandText = $"SELECT interval FROM {table}",
Connection = conn
};
var da = new NpgsqlDataAdapter { SelectCommand = command };
da.Fill(dt);
}
[Test]
public async Task Interval_as_TimeSpan2()
{
using var conn = await OpenConnectionAsync();
var table = await GetTempTableName(conn);
await conn.ExecuteNonQueryAsync($@"
CREATE TABLE {table} (
pk SERIAL PRIMARY KEY,
interval INTERVAL
);
INSERT INTO {table} (interval) VALUES ('1 hour'::INTERVAL);");
var dt = new DataTable("data");
//DataColumn c = dt.Columns.Add("dauer", typeof(TimeSpan));
// DataColumn c = dt.Columns.Add("dauer", typeof(NpgsqlInterval));
//c.AllowDBNull = true;
var command = new NpgsqlCommand();
command.CommandType = CommandType.Text;
command.CommandText = $"SELECT interval FROM {table}";
command.Connection = conn;
var da = new NpgsqlDataAdapter();
da.SelectCommand = command;
da.Fill(dt);
}
[Test]
public async Task DataAdapter_command_access()
{
using var conn = await OpenConnectionAsync();
using var command = new NpgsqlCommand("SELECT CAST('1 hour' AS interval) AS dauer", conn);
var da = new NpgsqlDataAdapter();
da.SelectCommand = command;
System.Data.Common.DbDataAdapter common = da;
Assert.That(common.SelectCommand, Is.Not.Null);
}
[Test, Description("Makes sure that the INSERT/UPDATE/DELETE commands are auto-populated on NpgsqlDataAdapter")]
[IssueLink("https://github.com/npgsql/npgsql/issues/179")]
public async Task Auto_populate_adapter_commands()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
var da = new NpgsqlDataAdapter($"SELECT field_pk,field_int4 FROM {table}", conn);
var builder = new NpgsqlCommandBuilder(da);
var ds = new DataSet();
da.Fill(ds);
var t = ds.Tables[0];
var row = t.NewRow();
row["field_pk"] = 1;
row["field_int4"] = 8;
t.Rows.Add(row);
da.Update(ds);
Assert.That(await conn.ExecuteScalarAsync($"SELECT field_int4 FROM {table}"), Is.EqualTo(8));
row["field_int4"] = 9;
da.Update(ds);
Assert.That(await conn.ExecuteScalarAsync($"SELECT field_int4 FROM {table}"), Is.EqualTo(9));
row.Delete();
da.Update(ds);
Assert.That(await conn.ExecuteScalarAsync($"SELECT COUNT(*) FROM {table}"), Is.EqualTo(0));
}
[Test]
public void Command_builder_quoting()
{
var cb = new NpgsqlCommandBuilder();
const string orig = "some\"column";
var quoted = cb.QuoteIdentifier(orig);
Assert.That(quoted, Is.EqualTo("\"some\"\"column\""));
Assert.That(cb.UnquoteIdentifier(quoted), Is.EqualTo(orig));
}
[Test, Description("Makes sure a correct SQL string is built with GetUpdateCommand(true) using correct parameter names and placeholders")]
[IssueLink("https://github.com/npgsql/npgsql/issues/397")]
public async Task Get_UpdateCommand()
{
using var conn = await OpenConnectionAsync();
var table = await SetupTempTable(conn);
using var da = new NpgsqlDataAdapter($"SELECT field_pk, field_int4 FROM {table}", conn);
using var cb = new NpgsqlCommandBuilder(da);
var updateCommand = cb.GetUpdateCommand(true);
da.UpdateCommand = updateCommand;
var ds = new DataSet();
da.Fill(ds);
var t = ds.Tables[0];
var row = t.Rows.Add();
row["field_pk"] = 1;
row["field_int4"] = 1;
da.Update(ds);
row["field_int4"] = 2;
da.Update(ds);
row.Delete();
da.Update(ds);
}
[Test]
public async Task Load_DataTable()
{
using var conn = await OpenConnectionAsync();
var table = await CreateTempTable(conn, "char5 CHAR(5), varchar5 VARCHAR(5)");
using var command = new NpgsqlCommand($"SELECT char5, varchar5 FROM {table}", conn);
using var dr = command.ExecuteReader();
var dt = new DataTable();
dt.Load(dr);
dr.Close();
Assert.That(dt.Columns[0].MaxLength, Is.EqualTo(5));
Assert.That(dt.Columns[1].MaxLength, Is.EqualTo(5));
}
public Task<string> SetupTempTable(NpgsqlConnection conn)
=> CreateTempTable(conn, @"
field_pk INTEGER PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
field_serial SERIAL,
field_int2 SMALLINT,
field_int4 INTEGER,
field_numeric NUMERIC,
field_timestamp TIMESTAMP");
}