/**
* destination table : a table whose columns are getting queried intermediate table : a table
* which is only used as a link between cube and destination table
*
* @param alias
* @param tblName
* @param isOptional pass false when it's a destination table pass true when it's an intermediate
* table when join chain destination is being added, this will be false.
* @param isChainedDimension pass true when you're adding the dimension as a joinchain
* destination, pass false when this table is mentioned by name in the user query
* @return true if added
* @throws LensException
*/
private boolean addQueriedTable(
String alias, String tblName, boolean isOptional, boolean isChainedDimension)
throws LensException {
alias = alias.toLowerCase();
if (cubeTbls.containsKey(alias)) {
return true;
}
try {
if (metastoreClient.isCube(tblName)) {
if (cube != null) {
if (!cube.getName().equalsIgnoreCase(tblName)) {
throw new LensException(
LensCubeErrorCode.MORE_THAN_ONE_CUBE.getLensErrorInfo(), cube.getName(), tblName);
}
}
cube = metastoreClient.getCube(tblName);
cubeTbls.put(alias, (AbstractCubeTable) cube);
} else if (metastoreClient.isDimension(tblName)) {
Dimension dim = metastoreClient.getDimension(tblName);
if (!isOptional) {
dimensions.add(dim);
}
if (!isChainedDimension) {
nonChainedDimensions.add(dim);
}
cubeTbls.put(alias, dim);
} else {
return false;
}
} catch (HiveException e) {
return false;
}
return true;
}
public CubeQueryContext(ASTNode ast, QB qb, Configuration queryConf, HiveConf metastoreConf)
throws LensException {
this.ast = ast;
this.qb = qb;
this.conf = queryConf;
this.clauseName = getClause();
this.timeRanges = new ArrayList<TimeRange>();
try {
metastoreClient = CubeMetastoreClient.getInstance(metastoreConf);
} catch (HiveException e) {
throw new LensException(e);
}
if (qb.getParseInfo().getWhrForClause(clauseName) != null) {
this.whereAST = qb.getParseInfo().getWhrForClause(clauseName);
}
if (qb.getParseInfo().getHavingForClause(clauseName) != null) {
this.havingAST = qb.getParseInfo().getHavingForClause(clauseName);
}
if (qb.getParseInfo().getOrderByForClause(clauseName) != null) {
this.orderByAST = qb.getParseInfo().getOrderByForClause(clauseName);
}
if (qb.getParseInfo().getGroupByForClause(clauseName) != null) {
this.groupByAST = qb.getParseInfo().getGroupByForClause(clauseName);
}
if (qb.getParseInfo().getSelForClause(clauseName) != null) {
this.selectAST = qb.getParseInfo().getSelForClause(clauseName);
}
for (ASTNode aggrTree : qb.getParseInfo().getAggregationExprsForClause(clauseName).values()) {
String aggr = HQLParser.getString(aggrTree);
aggregateExprs.add(aggr);
}
extractMetaTables();
}