4fb2506193acd3efa7d90bb640bd50e2aefe5d6a,lens-cube/src/main/java/org/apache/lens/cube/parse/DenormalizationResolver.java,DenormalizationResolver,rewriteContext,#CubeQueryContext#,328
Before Change
for (Dimension dim : cubeql.getDimensions()) {
for (Iterator<CandidateDim> i = cubeql.getCandidateDimTables().get(dim).iterator(); i.hasNext();) {
CandidateDim cdim = i.next();
if (denormCtx.tableToRefCols.containsKey(cdim.getName())) {
for (ReferencedQueriedColumn refcol : denormCtx.tableToRefCols.get(cdim.getName())) {
if (denormCtx.getReferencedCols().get(refcol.col.getName()).isEmpty()) {
log.info("Not considering dim table:{} as column {} is not available", cdim, refcol.col);
cubeql.addDimPruningMsgs(dim, cdim.dimtable,
CandidateTablePruneCause.columnNotFound(refcol.col.getName()));
i.remove();
}
}
After Change
*/
@Override
public void rewriteContext(CubeQueryContext cubeql) throws LensException {
DenormalizationContext denormCtx = cubeql.getDeNormCtx();
if (denormCtx == null) {
// Adds all the reference dimensions as eligible for denorm fields
// add ref columns in cube
addRefColsQueried(cubeql, cubeql, getOrCreateDeNormCtx(cubeql));
// add ref columns from expressions
for (Set<ExpressionContext> ecSet : cubeql.getExprCtx().getAllExprsQueried().values()) {
for (ExpressionContext ec : ecSet) {
for (ExprSpecContext esc : ec.getAllExprs()) {
addRefColsQueried(cubeql, esc, getOrCreateDeNormCtx(esc));
}
}
}
} else if (!denormCtx.tableToRefCols.isEmpty()) {
denormCtx.pruneReferences(cubeql);
// In the second iteration of denorm resolver
// candidate tables which require denorm fields and the refernces are no
// more valid will be pruned
if (cubeql.getCube() != null && !cubeql.getCandidateFacts().isEmpty()) {
for (Iterator<CandidateFact> i = cubeql.getCandidateFacts().iterator(); i.hasNext();) {
CandidateFact cfact = i.next();
Set<String> nonReachableFields = denormCtx.getNonReachableReferenceFields(cfact.getName());
if (!nonReachableFields.isEmpty()) {
log.info("Not considering fact table:{} as columns {} are not available", cfact, nonReachableFields);
cubeql.addFactPruningMsgs(cfact.fact, CandidateTablePruneCause.columnNotFound(nonReachableFields));
i.remove();
}
}
if (cubeql.getCandidateFacts().size() == 0) {
throw new LensException(LensCubeErrorCode.NO_FACT_HAS_COLUMN.getLensErrorInfo(),
cubeql.getColumnsQueriedForTable(cubeql.getCube().getName()).toString());
}
cubeql.pruneCandidateFactSet(CandidateTablePruneCode.COLUMN_NOT_FOUND);
}
if (cubeql.getDimensions() != null && !cubeql.getDimensions().isEmpty()) {
for (Dimension dim : cubeql.getDimensions()) {
for (Iterator<CandidateDim> i = cubeql.getCandidateDimTables().get(dim).iterator(); i.hasNext();) {
CandidateDim cdim = i.next();
Set<String> nonReachableFields = denormCtx.getNonReachableReferenceFields(cdim.getName());
if (!nonReachableFields.isEmpty()) {
log.info("Not considering dim table:{} as column {} is not available", cdim, nonReachableFields);
cubeql.addDimPruningMsgs(dim, cdim.dimtable,
CandidateTablePruneCause.columnNotFound(nonReachableFields));