/**
* Replaces BaseTableRefs in tblRefs whose alias matches a view registered in the given analyzer
* or its parent analyzers with a clone of the matching inline view. The cloned inline view
* inherits the context-dependent attributes such as the on-clause, join hints, etc. from the
* original BaseTableRef.
*
* <p>Matches views from the inside out, i.e., we first look in this analyzer then in the
* parentAnalyzer then and its parent, etc., and finally consult the catalog for matching views
* (the global scope).
*
* <p>This method is used for substituting views from WITH clauses and views from the catalog.
*/
public void substituteViews(Analyzer analyzer, List<TableRef> tblRefs)
throws AuthorizationException, AnalysisException {
for (int i = 0; i < tblRefs.size(); ++i) {
if (!(tblRefs.get(i) instanceof BaseTableRef)) continue;
BaseTableRef tblRef = (BaseTableRef) tblRefs.get(i);
ViewRef viewDefinition = analyzer.findViewDefinition(tblRef, true);
if (viewDefinition == null) continue;
// Instantiate the view to replace the original BaseTableRef.
ViewRef viewRef = viewDefinition.instantiate(tblRef);
viewRef.getViewStmt().setIsExplain(isExplain_);
tblRefs.set(i, viewRef);
}
}
