private void resolveColumnsAndReplaceAlias(CubeQueryContext cubeql, Set<ExprSpecContext> exprs)
throws SemanticException {
Set<ExprSpecContext> nestedExpressions = new LinkedHashSet<ExprSpecContext>();
for (ExprSpecContext esc : exprs) {
for (Map.Entry<String, Set<String>> entry : esc.getTblAliasToColumns().entrySet()) {
if (entry.getKey().equals(CubeQueryContext.DEFAULT_TABLE)) {
continue;
}
AbstractBaseTable baseTable =
(AbstractBaseTable) cubeql.getCubeTableForAlias(entry.getKey());
Set<String> exprCols = new HashSet<String>();
for (String col : entry.getValue()) {
// col is an expression
if (baseTable.getExpressionNames().contains(col)) {
exprCols.add(col);
}
}
// get all combinations of expression replaced with inner exprs AST.
addAllNestedExpressions(cubeql, esc, baseTable, nestedExpressions, exprCols);
}
}
for (ExprSpecContext esc : nestedExpressions) {
esc.resolveColumns(cubeql);
esc.replaceAliasInAST(cubeql);
for (String table : esc.getTblAliasToColumns().keySet()) {
try {
if (!CubeQueryContext.DEFAULT_TABLE.equalsIgnoreCase(table)
&& !srcAlias.equals(table)) {
cubeql.addOptionalDimTable(
table,
null,
false,
null,
false,
esc.getTblAliasToColumns().get(table).toArray(new String[0]));
esc.exprDims.add((Dimension) cubeql.getCubeTableForAlias(table));
}
} catch (HiveException e) {
throw new SemanticException(e);
}
}
}
exprs.addAll(nestedExpressions);
}
private void resolveColumnsAndAlias(CubeQueryContext cubeql) throws SemanticException {
for (ExprSpecContext esc : allExprs) {
esc.resolveColumns(cubeql);
esc.replaceAliasInAST(cubeql);
for (String table : esc.getTblAliasToColumns().keySet()) {
try {
if (!CubeQueryContext.DEFAULT_TABLE.equalsIgnoreCase(table)
&& !srcAlias.equals(table)) {
cubeql.addOptionalDimTable(
table,
null,
false,
null,
false,
esc.getTblAliasToColumns().get(table).toArray(new String[0]));
esc.exprDims.add((Dimension) cubeql.getCubeTableForAlias(table));
}
} catch (HiveException e) {
throw new SemanticException(e);
}
}
}
resolveColumnsAndReplaceAlias(cubeql, allExprs);
}