Question

以下是查询代码：

using (var connection = Connection) {
                string commandText;
                OdbcCommand command;
                if (loadedNodes.Count > 0)
                {
                    commandText = "SELECT * FROM TABLENAME where (PAR_1 = ? OR PAR_2 = ?) and PAR_1 NOT IN ({0}) and PAR_2 NOT IN ({0}) LIMIT ?";
                    var paramNames = loadedNodes.Select((s, index) => $"'@param{index}'").ToArray();
                    var inClause = string.Join(", ", paramNames);
                    command = new OdbcCommand(string.Format(commandText, inClause), connection);
                    for (int i = 0; i < paramNames.Length; i++)
                    {
                        command.Parameters.AddWithValue(paramNames[i], loadedNodes[i]);
                    }
                }
                else
                {
                    commandText = "SELECT * FROM TABLENAME where (PAR_1 = ? OR PAR_2 = ?) LIMIT ?";
                    command = new OdbcCommand(commandText, connection);
                }

                command.Parameters.Add("@PAR_1", OdbcType.VarChar).Value = inn;
                command.Parameters.Add("@PAR_2", OdbcType.VarChar).Value = inn;
                command.Parameters.Add("", OdbcType.Int).Value = limit;//!!!

                using (var reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        relatedRegistries.Add(Mapper.Resolve().Map<NdsRegistry>(reader));
                    }
                }
            }

在第一种情况下，我使用""传递了限制参数-工作正常。

在第二种情况下，commandText对象中的command看起来像：

SELECT * FROM TABLENAME where (PAR_1 = ? OR PAR_2 = ?) and PAR_1 NOT IN ('@param0') and PAR_2 NOT IN ('@param0') LIMIT ?

我在告诉错误：

 ERROR [HY000] [Hortonworks][Phoenix] (2020) An error occured while executing statement: 
    8org.apache.calcite.avatica.proto.Responses$ErrorResponse‘
    ћjava.lang.RuntimeException: org.apache.phoenix.schema.TypeMismatchException: ERROR 203 (22005): Type mismatch. INTEGER and VARCHAR
        at org.apache.calcite.avatica.jdbc.JdbcMeta.propagate(JdbcMeta.java:683)
        at org.apache.calcite.avatica.jdbc.JdbcMeta.execute(JdbcMeta.java:878)
        at org.apache.calcite.avatica.remote.LocalService.apply(LocalService.java:268)
        at org.apache.calcite.avatica.remote.Service$ExecuteRequest.accept(Service.java:1026)
        at org.apache.calcite.avatica.remote.Service$ExecuteRequest.accept(Service.java:1002)
        at org.apache.calcite.avatica.remote.AbstractHandler.apply(AbstractHandler.java:94)
        at org.apache.calcite.avatica.remote.ProtobufHandler.apply(ProtobufHandler.java:46)
        at org.apache.calcite.avatica.server.AvaticaProtobufHandler.handle(AvaticaProtobufHandler.java:127)
        at org.apache.phoenix.shaded.org.eclipse.jetty.server.handler.HandlerList.handle...

有人可以建议，没有=符号的情况下将参数传递到odbc命令的正确方法是什么？

ODBC命令。如何传递LIMIT操作数的参数

0 个答案: