private void normalizeSorts(SchemaContext pc) {
if (!EngineConstant.ORDERBY.has(this) && !EngineConstant.GROUPBY.has(this)) return;
Map<RewriteKey, ExpressionNode> projMap = ExpressionUtils.buildRewriteMap(getProjection());
if (EngineConstant.ORDERBY.has(this))
normalizeSorts(pc, projMap, EngineConstant.ORDERBY.getEdge(this));
if (EngineConstant.GROUPBY.has(this))
normalizeSorts(pc, projMap, EngineConstant.GROUPBY.getEdge(this));
}
@Override
public void normalize(SchemaContext pc) {
// we've already resolved everything. now we:
// [1] expand all wildcards and table wildcards (except for count(*))
// this is easy for the projection - walk down the list and look for naked wildcards or
// table wildcards
List<ExpressionNode> proj = getProjection();
proj = expandWildcards(pc, proj);
if (projectionMetadata == null || projectionMetadata.getWidth() != proj.size())
projectionMetadata = buildProjectionMetadata(pc, proj);
// [2] assign aliases for everything that does not already use an alias
// for the projection, this is easy - just walk down the list and anything that is
// not a DerivedColumn must need an alias
proj = assignProjectionAliases(pc, proj, getAliases());
setProjection(proj);
// for order by, group by, etc. now that the projection aliases are set, use them in any clauses
normalizeSorts(pc);
}
