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Posted to dev@metamodel.apache.org by "xgl1991714 (JIRA)" <ji...@apache.org> on 2014/11/10 09:50:33 UTC
[jira] [Created] (METAMODEL-94) [MongoDbDataContext] The alias will
be lost,unless we use FunctionType
xgl1991714 created METAMODEL-94:
-----------------------------------
Summary: [MongoDbDataContext] The alias will be lost,unless we use FunctionType
Key: METAMODEL-94
URL: https://issues.apache.org/jira/browse/METAMODEL-94
Project: Metamodel
Issue Type: Bug
Affects Versions: 4.1.0-incubating, 4.2.0-incubating
Reporter: xgl1991714
here is the method 'executeQuery()' of MongoDbDataContext:
{quote}
*public* DataSet executeQuery(Query query) {
...
*boolean* allSelectItemsAreColumns = *true*;
List<SelectItem> selectItems = query.getSelectClause().getItems();
*for* (SelectItem selectItem : selectItems) {
*if* ({color:red}selectItem.getFunction() != *null* || selectItem.getColumn() == *null*{color}){
allSelectItemsAreColumns = *false*;
*break*;
}
}
*if* (allSelectItemsAreColumns) {
...
*final* DataSet dataSet = materializeMainSchemaTableInternal(table, columns, whereItems, firstRow, maxRows, *false*);
*return* {color:red}dataSet{color};
}
*return* {color:red}super.executeQuery(query){color};
}
{quote}
when I run:
{quote}
mongoDbDataContext.query().from({color:blue}"dept"{color}).select({color:blue}"dname"{color}).as({color:blue}"xxx"{color})
{quote}
the +allSelectItemsAreColumns+ is *true* and the alias is lost
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