我面临错误“ORA-00911：无效字符”，同时调用下面的功能。如果我使用带有硬编码值的SQL查询（到目前为止，它在下面的代码片段中被注解掉了），那么我将在Postman中获得JSON响应中的数据库记录，没有任何问题。所以，看起来我在论点上做错了什么。仅供参考，我正在使用“github.com/sijms/go-ora/v2“包连接到Oracle数据库。此外，'DashboardRecordsRequest'结构是在datamodel包，但我已经粘贴在下面的代码片段作为参考。请注意，由于我正在进行POC，我们将使用存储过程与Oracle进行交互。
Postman请求有效载荷：

{
    "username": "UserABC",
    "startindex": 0,
    "pagesize": 10,
    "sortby": "requestnumber",
    "sortorder": "DESC"
}

代码：

type DashboardRecordsRequest struct {
    Username                string `json:"username"`    
    StartIndex              int    `json:"startindex"`
    PageSize                int    `json:"pagesize"`
    SortBy                  string `json:"sortby"`
    SortOrder               string `json:"sortorder"`
}

func GetDashboardActiveRequestRecords(request datamodel.DashboardRecordsRequest) ([]datamodel.ActiveRequestRecord, error) {
    sortby := request.SortBy
    sortorder := request.SortOrder
    startindex := request.StartIndex
    pagesize := request.PageSize
    activerecords := []datamodel.ActiveRequestRecord{}

    slog.Info("Verify values", slog.String("sortby", sortby), slog.String("sortorder", sortorder), slog.Int("startindex", startindex), slog.Int("pagesize", pagesize))

    dbconn, err := getDBConnection()
    if err != nil {
        logger.Error("Could not connect to database")
        return activerecords, err
    }
    stmt, err := dbconn.Prepare("SELECT requestnumber, requeststatus, NVL(requestor, 'N/A'), NVL(pendingwith, 'N/A'), NVL(processtype, 'N/A'), actiondate FROM requests WHERE requeststatus = 'PENDINGAPPROVAL' ORDER BY ? ? OFFSET ? ROWS FETCH NEXT ? ROWS ONLY")
    /*stmt, err := dbconn.Prepare("SELECT requestnumber, requeststatus, NVL(requestor, 'N/A'), NVL(pendingwith, 'N/A'), NVL(processtype, 'N/A'), actiondate FROM requests WHERE requeststatus = 'PENDINGAPPROVAL' ORDER BY requestnumber DESC OFFSET 0 ROWS FETCH NEXT 10 ROWS ONLY")*/
    if err != nil {
        logger.Error("Error while building prepared statement for retrieving dashboard active records", slog.String("Error", err.Error()))
        return activerecords, err
    }
    rows, err := stmt.Query(sortby, sortorder, startindex, pagesize)
    //rows, err := stmt.Query()
    if err != nil {
        logger.Error("Error while executing prepared statement for retrieving dashboard active records", slog.String("Error", err.Error()))
        return activerecords, err
    }
    defer rows.Close()

    for rows.Next() {
        var rec datamodel.ActiveRequestRecord
        err = rows.Scan(&rec.RequestNumber, &rec.RequestStatus, &rec.RequestorName, &rec.PendingWith, &rec.ProcessType, &rec.LastActionDate)
        if err != nil {
            logger.Error("Error while processing database resultset for dashboard active records", slog.String("Error", err.Error()))
            return activerecords, err
        }
        activerecords = append(activerecords, rec)
    }
    return activerecords, err
}

请求表结构：

CREATE TABLE "REQUESTS" (
    "REQUESTNUMBER"          VARCHAR2(64 CHAR) NOT NULL ENABLE,
    "REQUESTSTATUS"          VARCHAR2(128 CHAR) NOT NULL ENABLE,
    "SUBMISSIONDATE"         TIMESTAMP(6),
    "PROCESSTYPE"            VARCHAR2(256 CHAR),
    "SUBMITTER"              VARCHAR2(256 CHAR) NOT NULL ENABLE,
    "REQUESTOR"              VARCHAR2(512 CHAR),
    "PENDINGWITH"            VARCHAR2(512 CHAR),
    "ACTIONDATE"             TIMESTAMP(6),
    "RESUBMISSIONDATE"       TIMESTAMP(6),
    PRIMARY KEY ( "REQUESTNUMBER" ),
    FOREIGN KEY ( "SUBMITTER" )
        REFERENCES "SUBMITTERS" ( "USERNAME" )
)

错误代码：

time=2023-10-04T06:43:06.304Z level=INFO source=C:/code/tutorials/myapp/internal/storage/dashboard.go:19 msg="Verify values" sortby=requestnumber sortorder=DESC startindex=0 pagesize=10
time=2023-10-04T06:43:06.603Z level=ERROR source=C:/code/tutorials/myapp/internal/storage/dashboard.go:34 msg="Error while executing prepared statement for retrieving dashboard active records" Error="ORA-00911: invalid character\n"