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public static FunctionCall ( ObjectName functionName ) : |
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| functionName | ObjectName | |
| Результат | ||
public override SqlFunctionCallExpression Deserialize(BinaryReader reader)
{
var functionName = ObjectName.Deserialize(reader);
var args = ReadExpressions(reader);
return(SqlExpression.FunctionCall(functionName, args));
}
public static void FormatWithNoArguments()
{
var expression = SqlExpression.FunctionCall(ObjectName.Parse("SYS.func1"));
var sql = expression.ToString();
var expected = "SYS.func1()";
Assert.AreEqual(expected, sql);
}
public void FormatToString()
{
var exp = SqlExpression.Cast(SqlExpression.FunctionCall("test", new SqlExpression[] {
SqlExpression.Constant(56)
}), PrimitiveTypes.VarChar(45));
var expected = "CAST(test(56) AS VARCHAR(45))";
Assert.AreEqual(expected, exp.ToString());
}
public static void FormatToString()
{
var trueExp = SqlExpression.FunctionCall("testResult");
var falseExp = SqlExpression.Constant(false);
var testExp = SqlExpression.Equal(SqlExpression.VariableReference("a"), SqlExpression.Constant(22));
var condition = SqlExpression.Conditional(testExp, trueExp, falseExp);
var expected = "CASE WHEN :a = 22 THEN testResult() ELSE FALSE";
Assert.AreEqual(expected, condition.ToString());
}
public static void FormatWithNamedArguments()
{
var expression = SqlExpression.FunctionCall(ObjectName.Parse("SYS.func1"), new InvokeArgument[] {
new InvokeArgument("a", SqlExpression.Constant(1)),
});
var sql = expression.ToString();
var expected = "SYS.func1(a => 1)";
Assert.AreEqual(expected, sql);
}
public static void FormatWithAnonArguments()
{
var expression = SqlExpression.FunctionCall(ObjectName.Parse("SYS.func1"), new SqlExpression[] {
SqlExpression.Constant("order1"),
SqlExpression.Constant(2)
});
var sql = expression.ToString();
var expected = "SYS.func1('order1', 2)";
Assert.AreEqual(expected, sql);
}
private void CreateTestTable()
{
var tableInfo = new TableInfo(ObjectName.Parse("APP.test_table"));
var idColumn = tableInfo.AddColumn("id", PrimitiveTypes.Integer());
idColumn.DefaultExpression = SqlExpression.FunctionCall("UNIQUEKEY",
new SqlExpression[] { SqlExpression.Reference(tableInfo.TableName) });
tableInfo.AddColumn("first_name", PrimitiveTypes.String());
tableInfo.AddColumn("last_name", PrimitiveTypes.String());
tableInfo.AddColumn("birth_date", PrimitiveTypes.DateTime());
tableInfo.AddColumn("active", PrimitiveTypes.Boolean());
Query.CreateTable(tableInfo);
Query.AddPrimaryKey(tableInfo.TableName, "id", "PK_TEST_TABLE");
}
private void CreateTestTable(IQuery query)
{
var tableName = ObjectName.Parse("APP.test_table");
query.Access().CreateTable(table => table
.Named(tableName)
.WithColumn(column => column
.Named("id")
.HavingType(PrimitiveTypes.Integer())
.WithDefault(SqlExpression.FunctionCall("UNIQUEKEY",
new SqlExpression[] { SqlExpression.Constant(tableName.FullName) })))
.WithColumn("first_name", PrimitiveTypes.String())
.WithColumn("last_name", PrimitiveTypes.String())
.WithColumn("birth_date", PrimitiveTypes.DateTime())
.WithColumn("active", PrimitiveTypes.Boolean()));
query.Access().AddPrimaryKey(tableName, "id", "PK_TEST_TABLE");
}
public void StringToDate()
{
var toDate = SqlExpression.FunctionCall("TODATE", new[] { SqlExpression.Constant(Field.String("2016-01-20")) });
var returnType = toDate.ReturnType(null, null);
Assert.IsInstanceOf <DateType>(returnType);
var evaluated = toDate.Evaluate();
Assert.IsNotNull(evaluated);
Assert.IsInstanceOf <SqlConstantExpression>(evaluated);
var constExpr = (SqlConstantExpression)evaluated;
Assert.IsNotNull(constExpr.Value);
Assert.IsInstanceOf <DateType>(constExpr.Value.Type);
var date = (SqlDateTime)constExpr.Value.Value;
Assert.AreEqual(2016, date.Year);
Assert.AreEqual(1, date.Month);
Assert.AreEqual(20, date.Day);
}
/// <summary>
/// Visits the expression that calls the function defined.
/// </summary>
/// <param name="expression">The <see cref="SqlFunctionCallExpression"/> to visit.</param>
/// <returns></returns>
public virtual SqlExpression VisitFunctionCall(SqlFunctionCallExpression expression)
{
var ags = VisitExpressionList(expression.Arguments);
return(SqlExpression.FunctionCall(expression.FunctioName, ags));
}
