object IPreparable.Prepare(IExpressionPreparer preparer)
{
var statement = new DeclareVariableStatement(VariableName, VariableType);
if (DefaultExpression != null)
statement.DefaultExpression = DefaultExpression.Prepare(preparer);
statement.IsConstant = IsConstant;
return statement;
}
protected virtual SqlStatement VisitDeclareVariable(DeclareVariableStatement statement)
{
return(new DeclareVariableStatement(statement.VariableName, statement.VariableType)
{
IsNotNull = statement.IsNotNull,
IsConstant = statement.IsConstant,
DefaultExpression = statement.DefaultExpression
});
}
public static void NotNullString()
{
var statement = new DeclareVariableStatement("a", PrimitiveTypes.VarChar(30)) {
IsNotNull = true
};
var sql = statement.ToString();
var expected = "a VARCHAR(30) NOT NULL";
Assert.AreEqual(expected, sql);
}
public static void ConstantInteger()
{
var statement = new DeclareVariableStatement("a", PrimitiveTypes.Integer()) {
IsConstant = true
};
var sql = statement.ToString();
var expected = "CONSTANT a INTEGER";
Assert.AreEqual(expected, sql);
}
protected override void BuildStatement(SqlCodeObjectBuilder builder)
{
var varType = DataTypeBuilder.Build(builder.TypeResolver, Type);
var statement = new DeclareVariableStatement(VariableName, varType);
if (DefaultExpression != null)
statement.DefaultExpression = ExpressionBuilder.Build(DefaultExpression);
statement.IsConstant = IsConstant;
statement.IsNotNull = IsConstant || IsNotNull;
builder.AddObject(statement);
}
protected override SqlStatement PrepareExpressions(IExpressionPreparer preparer)
{
var statement = new DeclareVariableStatement(VariableName, VariableType);
if (DefaultExpression != null)
{
statement.DefaultExpression = DefaultExpression.Prepare(preparer);
}
statement.IsConstant = IsConstant;
return(statement);
}
public static void BigIntWithDefault()
{
var statement = new DeclareVariableStatement("c", PrimitiveTypes.BigInt()) {
DefaultExpression =
SqlExpression.Multiply(SqlExpression.Constant(56), SqlExpression.Reference(new ObjectName("test.a")))
};
var sql = statement.ToString();
var expected = "c BIGINT := 56 * test.a";
Assert.AreEqual(expected, sql);
}
object IPreparable.Prepare(IExpressionPreparer preparer)
{
var statement = new DeclareVariableStatement(VariableName, VariableType);
if (DefaultExpression != null)
{
statement.DefaultExpression = DefaultExpression.Prepare(preparer);
}
statement.IsConstant = IsConstant;
return(statement);
}
public static void NotNullString()
{
var statement = new DeclareVariableStatement("a", PrimitiveTypes.VarChar(30))
{
IsNotNull = true
};
var sql = statement.ToString();
var expected = "a VARCHAR(30) NOT NULL";
Assert.AreEqual(expected, sql);
}
public static void ConstantInteger()
{
var statement = new DeclareVariableStatement("a", PrimitiveTypes.Integer())
{
IsConstant = true
};
var sql = statement.ToString();
var expected = "CONSTANT a INTEGER";
Assert.AreEqual(expected, sql);
}
public static void BigIntWithDefault()
{
var statement = new DeclareVariableStatement("c", PrimitiveTypes.BigInt())
{
DefaultExpression =
SqlExpression.Multiply(SqlExpression.Constant(56), SqlExpression.Reference(new ObjectName("test.a")))
};
var sql = statement.ToString();
var expected = "c BIGINT := 56 * test.a";
Assert.AreEqual(expected, sql);
}
protected virtual SqlStatement VisitDeclareVariable(DeclareVariableStatement statement)
{
return new DeclareVariableStatement(statement.VariableName, statement.VariableType) {
IsNotNull = statement.IsNotNull,
IsConstant = statement.IsConstant,
DefaultExpression = statement.DefaultExpression
};
}
public void DeclareVariable()
{
var statement = new DeclareVariableStatement("a", PrimitiveTypes.String());
SerializeAndAssert(statement, (serialized, deserialized) => {
Assert.IsNotNull(deserialized);
Assert.IsNotNull(deserialized.VariableName);
Assert.IsNotNull(deserialized.VariableType);
Assert.AreEqual("a", deserialized.VariableName);
Assert.IsInstanceOf<StringType>(deserialized.VariableType);
});
}
protected override SqlStatement PrepareExpressions(IExpressionPreparer preparer)
{
var statement = new DeclareVariableStatement(VariableName, VariableType);
if (DefaultExpression != null)
statement.DefaultExpression = DefaultExpression.Prepare(preparer);
statement.IsConstant = IsConstant;
return statement;
}