You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@empire-db.apache.org by do...@apache.org on 2013/09/05 11:58:21 UTC
svn commit: r1520265 -
/empire-db/trunk/empire-db/src/main/java/org/apache/empire/db/DBDatabase.java
Author: doebele
Date: Thu Sep 5 09:58:20 2013
New Revision: 1520265
URL: http://svn.apache.org/r1520265
Log:
EMPIREDB-170
created a new overload DBDatabase.querySingleValue(DBCommand cmd, DataType dataType, Connection conn) that allows to specify the expected return type.
Modified:
empire-db/trunk/empire-db/src/main/java/org/apache/empire/db/DBDatabase.java
Modified: empire-db/trunk/empire-db/src/main/java/org/apache/empire/db/DBDatabase.java
URL: http://svn.apache.org/viewvc/empire-db/trunk/empire-db/src/main/java/org/apache/empire/db/DBDatabase.java?rev=1520265&r1=1520264&r2=1520265&view=diff
==============================================================================
--- empire-db/trunk/empire-db/src/main/java/org/apache/empire/db/DBDatabase.java (original)
+++ empire-db/trunk/empire-db/src/main/java/org/apache/empire/db/DBDatabase.java Thu Sep 5 09:58:20 2013
@@ -817,13 +817,31 @@ public abstract class DBDatabase extends
* If the query does not return a result a QueryNoResultException is thrown
*
* @param cmd the Command object that contains the select statement
+ * @param dataType the expected data type
+ * @param conn a valid connection to the database.
+ *
+ * @return the value of the first column in the first row of the query
+ */
+ public final Object querySingleValue(DBCommand cmd, DataType dataType, Connection conn)
+ {
+ Object value = querySingleValue(cmd.getSelect(), cmd.getParamValues(), dataType, conn);
+ if (value==ObjectUtils.NO_VALUE)
+ throw new QueryNoResultException(cmd.getSelect());
+ return value;
+ }
+
+ /**
+ * Returns the value of the first row/column of a sql-query as an object.
+ * If the query does not return a result a QueryNoResultException is thrown
+ *
+ * @param cmd the Command object that contains the select statement
* @param conn a valid connection to the database.
*
* @return the value of the first column in the first row of the query
*/
public final Object querySingleValue(DBCommand cmd, Connection conn)
{
- return querySingleValue(cmd.getSelect(), cmd.getParamValues(), conn);
+ return querySingleValue(cmd, DataType.UNKNOWN, conn);
}
/**