private OperatorExpression(Operator op, bool useNewPrecedences, VisitedExpression left, VisitedExpression right)
{
this.op = op;
this.useNewPrecedences = useNewPrecedences;
this.left = left;
this.right = right;
}
public JoinExpression(InputExpression left, DbExpressionKind joinType, InputExpression right, VisitedExpression condition)
{
_left = left;
_joinType = joinType;
_right = right;
_condition = condition;
}
OperatorExpression(Operator op, bool useNewPrecedences, [CanBeNull] VisitedExpression left, [CanBeNull] VisitedExpression right)
{
_op = op;
_useNewPrecedences = useNewPrecedences;
_left = left;
_right = right;
}
public override void BuildCommand(DbCommand command)
{
System.Diagnostics.Debug.Assert(command is NpgsqlCommand);
System.Diagnostics.Debug.Assert(_commandTree.Query is DbProjectExpression);
VisitedExpression ve = _commandTree.Query.Accept(this);
System.Diagnostics.Debug.Assert(ve is InputExpression);
InputExpression pe = (InputExpression)ve;
command.CommandText = pe.ToString();
// We retrieve all strings as unknowns in text format in the case the data types aren't really texts
((NpgsqlCommand)command).UnknownResultTypeList = pe.Projection.Arguments.Select(a => ((PrimitiveType)((ColumnExpression)a).ColumnType.EdmType).PrimitiveTypeKind == PrimitiveTypeKind.String).ToArray();
// We must treat sbyte and DateTimeOffset specially so the value is read correctly
if (pe.Projection.Arguments.Any(a => {
var kind = ((PrimitiveType)((ColumnExpression)a).ColumnType.EdmType).PrimitiveTypeKind;
return(kind == PrimitiveTypeKind.SByte || kind == PrimitiveTypeKind.DateTimeOffset);
}))
{
((NpgsqlCommand)command).ObjectResultTypes = pe.Projection.Arguments.Select(a => {
var kind = ((PrimitiveType)((ColumnExpression)a).ColumnType.EdmType).PrimitiveTypeKind;
if (kind == PrimitiveTypeKind.SByte)
{
return(typeof(sbyte));
}
else if (kind == PrimitiveTypeKind.DateTimeOffset)
{
return(typeof(DateTimeOffset));
}
return(null);
}).ToArray();
}
}
public static OperatorExpression Build(Operator op, bool useNewPrecedences, VisitedExpression left, VisitedExpression right)
{
if (op.UnaryType == Operator.UnaryTypes.Binary)
{
return(new OperatorExpression(op, useNewPrecedences, left, right));
}
throw new InvalidOperationException("Unary operator with two operands");
}
public void AppendSet(VisitedExpression property, VisitedExpression value)
{
Append(_setSeperatorRequired ? "," : " SET ");
Append(property);
Append("=");
Append(value);
_setSeperatorRequired = true;
}
public void AppendGroupingKey(VisitedExpression key)
{
if (_requiresGroupSeperator)
{
Append(",");
}
Append(key);
_requiresGroupSeperator = true;
}
public void AppendSort(VisitedExpression sort, bool ascending)
{
if (_requiresOrderSeperator)
{
Append(",");
}
Append(sort);
Append(ascending ? " ASC " : " DESC ");
_requiresOrderSeperator = true;
}
public override void BuildCommand(DbCommand command)
{
System.Diagnostics.Debug.Assert(command is NpgsqlCommand);
System.Diagnostics.Debug.Assert(_commandTree.Query is DbProjectExpression);
VisitedExpression ve = _commandTree.Query.Accept(this);
System.Diagnostics.Debug.Assert(ve is InputExpression);
InputExpression pe = (InputExpression)ve;
command.CommandText = pe.ToString();
}
public FromExpression(VisitedExpression from, string name)
{
_from = from;
if (name != null)
{
_name = name;
}
else
{
_name = "ALIAS" + _uniqueName++;
}
}
public static OperatorExpression Build(Operator op, bool useNewPrecedences, VisitedExpression exp)
{
switch (op.UnaryType)
{
case Operator.UnaryTypes.Prefix:
return(new OperatorExpression(op, useNewPrecedences, null, exp));
case Operator.UnaryTypes.Postfix:
return(new OperatorExpression(op, useNewPrecedences, exp, null));
default:
throw new InvalidOperationException("Binary operator with one operand");
}
}
public static OperatorExpression Build(Operator op, bool useNewPrecedences, VisitedExpression exp)
{
if (op.UnaryType == Operator.UnaryTypes.Prefix)
{
return(new OperatorExpression(op, useNewPrecedences, null, exp));
}
else if (op.UnaryType == Operator.UnaryTypes.Postfix)
{
return(new OperatorExpression(op, useNewPrecedences, exp, null));
}
else
{
throw new InvalidOperationException("Binary operator with one operand");
}
}
public override void BuildCommand(DbCommand command)
{
System.Diagnostics.Debug.Assert(command is NpgsqlCommand);
System.Diagnostics.Debug.Assert(_commandTree.Query is DbProjectExpression);
VisitedExpression ve = _commandTree.Query.Accept(this);
System.Diagnostics.Debug.Assert(ve is ProjectionExpression);
ProjectionExpression pe = (ProjectionExpression)ve;
command.CommandText = pe.ToString();
List <Type> expectedTypes = new List <Type>();
foreach (var column in pe.Columns)
{
expectedTypes.Add(column.CLRType);
}
((NpgsqlCommand)command).ExpectedTypes = expectedTypes.ToArray();
}
/// <summary>
/// Negates an expression.
/// If possible, replaces the operator of exp if exp is a negatable OperatorExpression,
/// else return a new OperatorExpression of type Not that wraps exp.
/// </summary>
public static VisitedExpression Negate(VisitedExpression exp, bool useNewPrecedences)
{
OperatorExpression expOp = exp as OperatorExpression;
if (expOp != null)
{
Operator op = expOp.op;
Operator newOp = null;
if (Operator.NegateDict.TryGetValue(op, out newOp))
{
expOp.op = newOp;
return(expOp);
}
if (expOp.op == Operator.Not)
{
return(expOp.right);
}
}
return(OperatorExpression.Build(Operator.Not, useNewPrecedences, exp));
}
public void AppendTarget(VisitedExpression target)
{
Append(target);
}
public void AppendTarget(VisitedExpression target)
{
Append(target);
}
public void AppendWhere(VisitedExpression where)
{
Append(" WHERE ");
Append(where);
}
public ExistsExpression(VisitedExpression argument)
{
_argument = argument;
}
public IsNullExpression(VisitedExpression argument)
{
_argument = argument;
}
public static OperatorExpression Build(Operator op, VisitedExpression exp)
{
if (op.UnaryType == Operator.UnaryTypes.Prefix)
{
return new OperatorExpression(op, null, exp);
}
else if (op.UnaryType == Operator.UnaryTypes.Postfix)
{
return new OperatorExpression(op, exp, null);
}
else
{
throw new InvalidOperationException("Binary operator with one operand");
}
}
public NegatableBooleanExpression(DbExpressionKind booleanOperator, VisitedExpression left, VisitedExpression right)
{
_booleanOperator = booleanOperator;
_left = left;
_right = right;
}
public ExistsExpression(VisitedExpression argument)
{
_argument = argument;
}
internal void AddArgument(VisitedExpression visitedExpression)
{
_args.Add(visitedExpression);
}
/// <summary>
/// Negates an expression.
/// If possible, replaces the operator of exp if exp is a negatable OperatorExpression,
/// else return a new OperatorExpression of type Not that wraps exp.
/// </summary>
public static VisitedExpression Negate(VisitedExpression exp)
{
OperatorExpression expOp = exp as OperatorExpression;
if (expOp != null)
{
Operator op = expOp.op;
Operator newOp = null;
if (Operator.NegateDict.TryGetValue(op, out newOp))
{
expOp.op = newOp;
return expOp;
}
if (expOp.op == Operator.Not)
{
return expOp.right;
}
}
return OperatorExpression.Build(Operator.Not, exp);
}
private OperatorExpression(Operator op, VisitedExpression left, VisitedExpression right)
{
this.op = op;
this.left = left;
this.right = right;
}
internal FunctionExpression AddArgument(VisitedExpression visitedExpression)
{
_args.Add(visitedExpression);
return this;
}
public new LiteralExpression Append(VisitedExpression expresion)
{
base.Append(expresion);
return this;
}
internal void And(VisitedExpression andAlso)
{
_where = OperatorExpression.Build(Operator.And, _where, andAlso);
}
internal void And(VisitedExpression andAlso)
{
_where = new BooleanExpression("AND", _where, andAlso);
}
public IsNullExpression(VisitedExpression argument)
{
_argument = argument;
}
public void AppendWhere(VisitedExpression where)
{
Append(" WHERE ");
Append(where);
}
public LimitExpression(VisitedExpression arg)
{
_arg = arg;
}
public FromExpression(VisitedExpression from, string name)
{
_from = from;
if (name != null)
{
_name = name;
}
else
{
_name = "ALIAS" + _uniqueName++;
}
}
public SkipExpression(VisitedExpression arg)
{
_arg = arg;
}
public void AppendGroupingKey(VisitedExpression key)
{
if (_requiresGroupSeperator)
Append(",");
Append(key);
_requiresGroupSeperator = true;
}
public static OperatorExpression Build(Operator op, VisitedExpression left, VisitedExpression right)
{
if (op.UnaryType == Operator.UnaryTypes.Binary)
{
return new OperatorExpression(op, left, right);
}
else
{
throw new InvalidOperationException("Unary operator with two operands");
}
}
public BooleanExpression(string booleanOperator, VisitedExpression left, VisitedExpression right)
{
_booleanOperator = booleanOperator;
_left = left;
_right = right;
}
public NegatableBooleanExpression(DbExpressionKind booleanOperator, VisitedExpression left, VisitedExpression right)
{
_booleanOperator = booleanOperator;
_left = left;
_right = right;
}
public JoinExpression(InputExpression left, DbExpressionKind joinType, InputExpression right, VisitedExpression condition)
{
_left = left;
_joinType = joinType;
_right = right;
_condition = condition;
}
public NegateExpression(VisitedExpression argument)
{
_argument = argument;
Negated = true;
}
public new void Append(VisitedExpression expresion)
{
base.Append(expresion);
}
public CastExpression(VisitedExpression value, string type)
{
_value = value;
_type = type;
}
public BooleanExpression(string booleanOperator, VisitedExpression left, VisitedExpression right)
{
_booleanOperator = booleanOperator;
_left = left;
_right = right;
}
public SkipExpression(VisitedExpression arg)
{
_arg = arg;
}
public CombinedProjectionExpression(VisitedExpression first, string setOperator, VisitedExpression second)
{
_first = first;
_setOperator = setOperator;
_second = second;
}
public void AppendSet(VisitedExpression property, VisitedExpression value)
{
if (_setSeperatorRequired)
Append(",");
else
Append(" SET ");
Append(property);
Append("=");
Append(value);
_setSeperatorRequired = true;
}
public NegateExpression(VisitedExpression argument)
{
_argument = argument;
Negated = true;
}
public void Append(VisitedExpression expression)
{
ExpressionList.Add(expression);
}
public void Append(VisitedExpression expression)
{
ExpressionList.Add(expression);
}
public WhereExpression(VisitedExpression where)
{
_where = where;
}
public void AppendFrom(VisitedExpression from)
{
Append(from);
}
internal void And(VisitedExpression andAlso)
{
_where = new BooleanExpression("AND", _where, andAlso);
}
public ColumnExpression(VisitedExpression column, string columnName, TypeUsage columnType)
{
_column = column;
_columnName = columnName;
_columnType = columnType;
}
public void AppendSort(VisitedExpression sort, bool ascending)
{
if (_requiresOrderSeperator)
Append(",");
Append(sort);
if (ascending)
Append(" ASC ");
else
Append(" DESC ");
_requiresOrderSeperator = true;
}
public new void Append(VisitedExpression expresion)
{
base.Append(expresion);
}
public ColumnExpression(VisitedExpression column, string columnName, TypeUsage columnType)
{
_column = column;
_columnName = columnName;
_columnType = columnType;
}
public WhereExpression(VisitedExpression where)
{
_where = where;
}
public CombinedProjectionExpression(VisitedExpression first, string setOperator, VisitedExpression second)
{
_first = first;
_setOperator = setOperator;
_second = second;
}
internal void AddArgument(VisitedExpression visitedExpression)
{
_args.Add(visitedExpression);
}
public void AppendFrom(VisitedExpression from)
{
Append(from);
}