Question

我正在使用Datenwerke ReportServer。我正试图通过DJBC消费Caché来源。 Here is a blog post from them on adding additional databases。不幸的是，我并不完全理解它。我在正确的位置有JDBC文件，我为Caché创建了一个groovy脚本，如下所示。问题与它所做的奇怪的Query Wrapper有关。我可以通过ReportServer UI成功测试数据源，但是当我尝试执行简单查询时，我收到以下错误：

错误

无法准备查询：为语句准备语句时出错   执行报告查询：SELECT * FROM（SELECT * FROM（SELECT TOP   10 * FROM HS_IHE_ATNA_Repository.Aggregation）wrappedQry）limitQry   LIMIT 50 OFFSET 0 / *令牌：6aab148a-927b-45d5-9dfd-724788e139ca / /   currentuser：3 * /

cache.groovy

package databasehelper;

import net.datenwerke.rs.scripting.service.scripting.scriptservices.GlobalsWrapper;
import net.datenwerke.rs.base.service.dbhelper.DatabaseHelper
import net.datenwerke.rs.base.service.dbhelper.hooks.DatabaseHelperProviderHook
import net.datenwerke.rs.base.service.dbhelper.queries.Query
import net.datenwerke.rs.base.service.dbhelper.querybuilder.ColumnNamingService
import net.datenwerke.rs.base.service.dbhelper.querybuilder.QueryBuilder

class Cache extends DatabaseHelper {

    public static final String DB_NAME = "Cache";
    public static final String DB_DRIVER = "com.intersys.jdbc.CacheDriver";
    public static final String DB_DESCRIPTOR = "DBHelper_Cache";

    @Override
    public String getDescriptor() {
        return DB_DESCRIPTOR;
    }

    @Override
    public String getDriver() {
        return DB_DRIVER;
    }

    @Override
    public String getName() {
        return DB_NAME;
    }

    @Override
    public String createDummyQuery() {
    return 'SELECT * FROM HS_IHE_ATNA_Repository.Aggregation'
    }

}


def HOOK_NAME = "DATASOURCE_HELPER_Cache"

def callback =  [
            provideDatabaseHelpers : {
                return Collections.singletonList(new Cache());
            }
        ] as DatabaseHelperProviderHook;

GLOBALS.services.callbackRegistry.attachHook(HOOK_NAME, DatabaseHelperProviderHook.class, callback)

看起来好像是在这里张贴这个，特别是

Answer 1

注意生成的查询：

SELECT * FROM (SELECT * FROM 
(SELECT TOP 10 * FROM HS_IHE_ATNA_Repository.Aggregation) 
wrappedQry) limitQry LIMIT 50 OFFSET 0

CachéSQL不支持LIMIT和OFFSET。

%VID和TOP可用于CachéSQL而不是LIMIT / OFFSET： http://docs.intersystems.com/cache20152/csp/docbook/DocBook.UI.Page.cls?KEY=GSQL_views#GSQL_C13474

Datenwerke ReportServer，无法添加自定义数据源（Caché）

1 个答案: