protected internal override Node VisitConstSqlExpression([NotNull] ConstSqlExpression node)
{
this.Data.SetType(node, new TypeDescriptor(node.Value?.GetType() ?? typeof(object)));
this.Data.SetScope(node, this.Scope.IsGroupByExpression(node) ? NodeScope.Group : NodeScope.Constant);
return(node);
}
/// <summary>
/// Replaces strings and field references to enum values.
/// </summary>
/// <param name="node">
/// The node to replace values with.
/// </param>
/// <returns>
/// The node with replaced.
/// </returns>
private Node ReplaceEnumArguments([NotNull] FunctionCallSqlExpression node)
{
var arguments = node.Arguments;
var function = this.Data.GetFunction(node);
for (var i = 0; i < function.Arguments.Count; i++)
{
var arg = arguments[i];
var param = function.Arguments[i].Type.SimplifiedType;
if (!param.GetTypeInfo().IsEnum)
{
continue;
}
var constExpr = arg as ConstSqlExpression;
var fieldExpr = arg as FieldReferenceSqlExpression;
ConstSqlExpression enumExpr;
if (fieldExpr != null && fieldExpr.Source == null)
{
enumExpr = new ConstSqlExpression(Enum.Parse(param, fieldExpr.Name, true));
}
else if (constExpr?.Value is int)
{
enumExpr = new ConstSqlExpression(Enum.ToObject(param, constExpr.Value));
}
else if (constExpr?.Value is string)
{
enumExpr = new ConstSqlExpression(Enum.Parse(param, (string)constExpr.Value, true));
}
else
{
continue;
}
arguments = new ReadOnlyCollection <SqlExpressionBase>(
new List <SqlExpressionBase>(arguments)
{
[i] = this.Data.CopyValues(arguments[i], enumExpr),
});
}
return(arguments != node.Arguments ? this.Data.CopyValues(node, new FunctionCallSqlExpression(node.Name, arguments)) : node);
}
/// <summary>
/// Visits a <see cref="ConstSqlExpression"/> expression.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <returns>
/// The node, or a new version of the node.
/// </returns>
protected internal virtual Node VisitConstSqlExpression([NotNull] ConstSqlExpression node)
{
return(node.VisitChildren(this));
}
/// <summary>
/// Visits a <see cref="ConstSqlExpression"/> expression.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <returns>
/// The node, or a new version of the node.
/// </returns>
protected internal override Node VisitConstSqlExpression(ConstSqlExpression node)
{
return(this.CheckForGroups(node, n => base.VisitConstSqlExpression(n)));
}
protected internal override Node VisitConstSqlExpression([NotNull] ConstSqlExpression node)
{
this.Builder.Append(node.Value == null ? "NULL" : node.Value is string?$"'{node.Value}'" : node.Value);
return(node);
}
/// <summary>
/// Visits a <see cref="ConstSqlExpression"/> expression.
/// </summary>
/// <param name="node">
/// The node.
/// </param>
/// <returns>
/// The node, or a new version of the node.
/// </returns>
protected internal override Node VisitConstSqlExpression(ConstSqlExpression node)
{
return(this.VisitImplementation(node) ?? base.VisitConstSqlExpression(node));
}
