|
public static Form ( PlSqlParser context ) : |
||
| context | PlSqlParser | |
| 리턴 | ||
public static SqlStatement Statement(PlSqlParser.AssignmentStatementContext context)
{
SqlExpression varRef;
if (context.general_element() != null)
{
var element = ElementNode.Form(context.general_element());
if (element.Argument != null &&
element.Argument.Length > 0)
{
throw new ParseCanceledException("Invalid assignment: cannot assign a function");
}
var name = element.Id;
if (name.Parent != null)
{
throw new ParseCanceledException("Invalid assignment.");
}
varRef = SqlExpression.VariableReference(name.ToString());
}
else if (context.bind_variable() != null)
{
var varName = Name.Variable(context.bind_variable());
varRef = SqlExpression.VariableReference(varName);
}
else
{
throw new ParseCanceledException("Invalid assignment syntax");
}
var valueExp = Expression.Build(context.expression());
return(new AssignVariableStatement(varRef, valueExp));
}
public override SqlExpression VisitGeneral_element(PlSqlParser.General_elementContext context)
{
var element = ElementNode.Form(context);
var name = element.Id;
if (element.Argument == null ||
element.Argument.Length == 0)
{
return(SqlExpression.Reference(name));
}
// TODO: support argument naming in DeveelDB
var funcArgs = element.Argument.Select(x => x.Expression).ToArray();
return(SqlExpression.FunctionCall(name, funcArgs));
}