// updates all expression specs which are evaluable
public void updateEvaluables(String expr, CandidateTable cTable) throws SemanticException {
String alias = cubeql.getAliasForTableName(cTable.getBaseTable().getName());
ExpressionContext ec = getExpressionContext(expr, alias);
if (cTable.getColumns().contains(expr)) {
// expression is directly materialized in candidate table
ec.addDirectlyAvailable(cTable);
}
for (ExprSpecContext esc : ec.allExprs) {
if (esc.getTblAliasToColumns().get(alias) == null) {
log.debug("{} = {} is evaluable in {}", expr, esc, cTable);
ec.addEvaluable(cubeql, cTable, esc);
} else {
Set<String> columns = esc.getTblAliasToColumns().get(alias);
boolean isEvaluable = true;
for (String col : columns) {
if (!cTable.getColumns().contains(col.toLowerCase())) {
if (!cubeql
.getDeNormCtx()
.addRefUsage(cTable, col, cTable.getBaseTable().getName())) {
// check if it is available as reference, if not expression is not evaluable
log.debug("{} = {} is not evaluable in {}", expr, esc, cTable);
isEvaluable = false;
break;
}
}
}
if (isEvaluable) {
log.debug("{} = {} is evaluable in {}", expr, esc, cTable);
ec.addEvaluable(cubeql, cTable, esc);
}
}
}
}
