String getQBFromString(CandidateFact fact, Map<Dimension, CandidateDim> dimsToQuery)
throws LensException {
String fromString;
if (getJoinAST() == null) {
if (cube != null) {
if (dimensions.size() > 0) {
throw new LensException(LensCubeErrorCode.NO_JOIN_CONDITION_AVAILABLE.getLensErrorInfo());
}
fromString = fact.getStorageString(getAliasForTableName(cube.getName()));
} else {
if (dimensions.size() != 1) {
throw new LensException(LensCubeErrorCode.NO_JOIN_CONDITION_AVAILABLE.getLensErrorInfo());
}
Dimension dim = dimensions.iterator().next();
fromString = dimsToQuery.get(dim).getStorageString(getAliasForTableName(dim.getName()));
}
} else {
StringBuilder builder = new StringBuilder();
getQLString(qb.getQbJoinTree(), builder, fact, dimsToQuery);
fromString = builder.toString();
}
return fromString;
}
private void getQLString(
QBJoinTree joinTree,
StringBuilder builder,
CandidateFact fact,
Map<Dimension, CandidateDim> dimsToQuery)
throws LensException {
List<String> joiningTables = new ArrayList<>();
if (joinTree.getBaseSrc()[0] == null) {
if (joinTree.getJoinSrc() != null) {
getQLString(joinTree.getJoinSrc(), builder, fact, dimsToQuery);
}
} else { // (joinTree.getBaseSrc()[0] != null){
String alias = joinTree.getBaseSrc()[0].toLowerCase();
builder.append(getStorageStringWithAlias(fact, dimsToQuery, alias));
joiningTables.add(alias);
}
if (joinTree.getJoinCond() != null) {
builder.append(JoinUtils.getJoinTypeStr(joinTree.getJoinCond()[0].getJoinType()));
builder.append(" JOIN ");
}
if (joinTree.getBaseSrc()[1] == null) {
if (joinTree.getJoinSrc() != null) {
getQLString(joinTree.getJoinSrc(), builder, fact, dimsToQuery);
}
} else { // (joinTree.getBaseSrc()[1] != null){
String alias = joinTree.getBaseSrc()[1].toLowerCase();
builder.append(getStorageStringWithAlias(fact, dimsToQuery, alias));
joiningTables.add(alias);
}
String joinCond = joinConds.get(joinTree);
if (joinCond != null) {
builder.append(" ON ");
builder.append(joinCond);
// joining tables will contain all tables involved in joins.
// we need to push storage filters for Dimensions into join conditions, thus the following
// code
// takes care of the same.
for (String joiningTable : joiningTables) {
if (cubeTbls.get(joiningTable) instanceof Dimension) {
DimOnlyHQLContext.appendWhereClause(
builder, getWhereClauseWithAlias(dimsToQuery, joiningTable), true);
dimsToQuery.get(cubeTbls.get(joiningTable)).setWhereClauseAdded(joiningTable);
}
}
} else {
throw new LensException(LensCubeErrorCode.NO_JOIN_CONDITION_AVAILABLE.getLensErrorInfo());
}
}
void printJoinTree(QBJoinTree joinTree, StringBuilder builder) {
builder.append("leftAlias:" + joinTree.getLeftAlias());
if (joinTree.getLeftAliases() != null) {
builder.append("\n leftAliases:");
for (String alias : joinTree.getLeftAliases()) {
builder.append("\n\t " + alias);
}
}
if (joinTree.getRightAliases() != null) {
builder.append("\n rightAliases:");
for (String alias : joinTree.getRightAliases()) {
builder.append("\n\t " + alias);
}
}
if (joinTree.getJoinSrc() != null) {
builder.append("\n JoinSrc: {");
printJoinTree(joinTree.getJoinSrc(), builder);
builder.append("\n }");
}
if (joinTree.getBaseSrc() != null) {
builder.append("\n baseSrcs:");
for (String src : joinTree.getBaseSrc()) {
builder.append("\n\t " + src);
}
}
builder.append("\n noOuterJoin: " + joinTree.getNoOuterJoin());
builder.append("\n noSemiJoin: " + joinTree.getNoSemiJoin());
builder.append("\n mapSideJoin: " + joinTree.isMapSideJoin());
if (joinTree.getJoinCond() != null) {
builder.append("\n joinConds:");
for (JoinCond cond : joinTree.getJoinCond()) {
builder.append(
"\n\t left: "
+ cond.getLeft()
+ " right: "
+ cond.getRight()
+ " type:"
+ cond.getJoinType()
+ " preserved:"
+ cond.getPreserved());
}
}
}
public void print() {
if (!log.isDebugEnabled()) {
return;
}
StringBuilder builder = new StringBuilder();
builder.append("ASTNode:" + ast.dump() + "\n");
builder.append("QB:");
builder.append("\n numJoins:" + qb.getNumJoins());
builder.append("\n numGbys:" + qb.getNumGbys());
builder.append("\n numSels:" + qb.getNumSels());
builder.append("\n numSelDis:" + qb.getNumSelDi());
builder.append("\n aliasToTabs:");
Set<String> tabAliases = qb.getTabAliases();
for (String alias : tabAliases) {
builder.append("\n\t" + alias + ":" + qb.getTabNameForAlias(alias));
}
builder.append("\n aliases:");
for (String alias : qb.getAliases()) {
builder.append(alias);
builder.append(", ");
}
builder.append("id:" + qb.getId());
builder.append("isQuery:" + qb.getIsQuery());
builder.append("\n QBParseInfo");
QBParseInfo parseInfo = qb.getParseInfo();
builder.append("\n isSubQ: " + parseInfo.getIsSubQ());
builder.append("\n alias: " + parseInfo.getAlias());
if (parseInfo.getJoinExpr() != null) {
builder.append("\n joinExpr: " + parseInfo.getJoinExpr().dump());
}
builder.append("\n hints: " + parseInfo.getHints());
builder.append("\n aliasToSrc: ");
for (String alias : tabAliases) {
builder.append("\n\t" + alias + ": " + parseInfo.getSrcForAlias(alias).dump());
}
TreeSet<String> clauses = new TreeSet<String>(parseInfo.getClauseNames());
for (String clause : clauses) {
builder.append("\n\t" + clause + ": " + parseInfo.getClauseNamesForDest());
}
String clause = clauses.first();
if (parseInfo.getWhrForClause(clause) != null) {
builder.append("\n whereexpr: " + parseInfo.getWhrForClause(clause).dump());
}
if (parseInfo.getGroupByForClause(clause) != null) {
builder.append("\n groupby expr: " + parseInfo.getGroupByForClause(clause).dump());
}
if (parseInfo.getSelForClause(clause) != null) {
builder.append("\n sel expr: " + parseInfo.getSelForClause(clause).dump());
}
if (parseInfo.getHavingForClause(clause) != null) {
builder.append("\n having expr: " + parseInfo.getHavingForClause(clause).dump());
}
if (parseInfo.getDestLimit(clause) != null) {
builder.append("\n limit: " + parseInfo.getDestLimit(clause));
}
if (parseInfo.getAllExprToColumnAlias() != null
&& !parseInfo.getAllExprToColumnAlias().isEmpty()) {
builder.append("\n exprToColumnAlias:");
for (Map.Entry<ASTNode, String> entry : parseInfo.getAllExprToColumnAlias().entrySet()) {
builder.append("\n\t expr: " + entry.getKey().dump() + " ColumnAlias: " + entry.getValue());
}
}
if (parseInfo.getAggregationExprsForClause(clause) != null) {
builder.append("\n aggregateexprs:");
for (Map.Entry<String, ASTNode> entry :
parseInfo.getAggregationExprsForClause(clause).entrySet()) {
builder.append("\n\t key: " + entry.getKey() + " expr: " + entry.getValue().dump());
}
}
if (parseInfo.getDistinctFuncExprsForClause(clause) != null) {
builder.append("\n distinctFuncExprs:");
for (ASTNode entry : parseInfo.getDistinctFuncExprsForClause(clause)) {
builder.append("\n\t expr: " + entry.dump());
}
}
if (qb.getQbJoinTree() != null) {
builder.append("\n\n JoinTree");
QBJoinTree joinTree = qb.getQbJoinTree();
printJoinTree(joinTree, builder);
}
if (qb.getParseInfo().getDestForClause(clause) != null) {
builder.append("\n Destination:");
builder.append("\n\t dest expr:" + qb.getParseInfo().getDestForClause(clause).dump());
}
log.debug(builder.toString());
}