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https://issues.apache.org/jira/browse/IBATIS-620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12739392#action_12739392
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Yuan Tao commented on IBATIS-620:
---------------------------------

The fix solution imported other bugs. so now, I have no idea to solve it. 

Should I need convert the result SqlSession.selectOne to Integer manually.

> "select count(*) from table" return BigDecimal value in Oracle
> --------------------------------------------------------------
>
>                 Key: IBATIS-620
>                 URL: https://issues.apache.org/jira/browse/IBATIS-620
>             Project: iBatis for Java
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: Yuan Tao
>
> User SqlSession.selectOne for the sql "select count(*) from table" defined in 
> mapping file should return Integer, but return BigDecimal in Oracle.
> The bug seems happen int DefaultResultSetHandler.mapResults method. There are 
> codes below:
> ...
>     for (int i = 1, n = rsmd.getColumnCount(); i <= n; i++) {
>       boolean useLabel = 
> mappedStatement.getConfiguration().isUseColumnLabel();
>       String columnLabel = (useLabel ? rsmd.getColumnLabel(i) : 
> rsmd.getColumnName(i));
>       columnLabel = columnLabel.toUpperCase();
>       String propName = metaResultObject.findProperty(columnLabel);
>       colSet.add(columnLabel);
>       if (propName != null) {
>         propSet.add(propName);
>         Class javaType = metaResultObject.getSetterType(propName);            
>           // This line will return Object if the resultObject is 
> PlatformTypeHolder
>               
>         TypeHandler typeHandler = 
> typeHandlerRegistry.getTypeHandler(javaType);
>         ResultMapping resultMapping = new 
> ResultMapping.Builder(configuration, propName, columnLabel, typeHandler)
>             .javaType(javaType).build();
>         autoMappings.put(propName, resultMapping);
>       }
>     }
> ...
> Maybe this bug can fixed by adding the code below after "Class javaType = 
> metaResultObject.getSetterType(propName);"
>         if (javaType.isAssignableFrom(rm.getType()))
>               javaType = rm.getType();

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