Github user ayingshu commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/39#discussion_r25928427
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/compile/QueryCompiler.java ---
@@ -147,21 +169,146 @@ public QueryCompiler(PhoenixStatement statement,
SelectStatement select, ColumnR
*/
public QueryPlan compile() throws SQLException{
SelectStatement select = this.select;
- List<Object> binds = statement.getParameters();
+ QueryPlan plan;
+ if (isUnionAll()) {
+ plan = compileUnionAll(select);
+ } else {
+ plan = compileSelect(select);
+ }
+ return plan;
+ }
+
+ public QueryPlan compileSelect(SelectStatement select) throws
SQLException{
+ // SelectStatement select = this.select;
+ List<Object> binds = statement.getParameters();
+ StatementContext context = new StatementContext(statement,
resolver, scan, sequenceManager);
+ ColumnResolver resolver;
+ if (isUnionAll()) {
+ resolver = FromCompiler.getResolverForQuery(select,
statement.getConnection());
+ context = new StatementContext(statement, resolver, new
Scan(), sequenceManager);
+ }
+ if (select.isJoin()) {
+ if (isUnionAll()) {
+ resolver =
FromCompiler.getResolverForQuery(select, statement.getConnection());
+ select = JoinCompiler.optimize(statement,
select, resolver);
+ }
+ else {
+ select = JoinCompiler.optimize(statement, select,
this.resolver);
+ }
+ if (this.select != select) {
+ ColumnResolver resolver1 =
FromCompiler.getResolverForQuery(select, statement.getConnection());
+ context = new StatementContext(statement,
resolver1, scan, sequenceManager);
+ }
+ JoinTable joinTable = JoinCompiler.compile(statement,
select, context.getResolver());
+ return compileJoinQuery(context, binds, joinTable,
false, false, null);
+ } else {
+ return compileSingleQuery(context, select, binds, false,
true);
+ }
+ }
+
+ private void checkForOrderByLimitInUnionAllSelect(SelectStatement
select) throws SQLException {
+ if (select.getOrderBy() != null && !select.getOrderBy().isEmpty())
{
+ throw new
SQLExceptionInfo.Builder(SQLExceptionCode.ORDER_BY_IN_UNIONALL_SELECT_NOT_SUPPORTED).setMessage(".").build().buildException();
+ }
+ if (select.getLimit() != null) {
+ throw new
SQLExceptionInfo.Builder(SQLExceptionCode.LIMIT_IN_UNIONALL_SELECT_NOT_SUPPORTED).setMessage(".").build().buildException();
+ }
+ }
+
+ private PTable createTempTableForUnionAllResultResolver(QueryPlan
plan) throws SQLException {
+ List<PColumn> projectedColumns = new ArrayList<PColumn>();
+ Long scn = statement.getConnection().getSCN();
+ List<PColumnFamily> families =
Collections.<PColumnFamily>emptyList(); // new ArrayList<PColumnFamily>();
+ PTable theTable = new
PTableImpl(statement.getConnection().getTenantId(), "unionAllSchema",
"unionAllTable", scn == null ? HConstants.LATEST_TIMESTAMP : scn, families);
+ PTable table = plan.getTableRef().getTable();
+ for (int i=0; i< plan.getProjector().getColumnCount(); i++) {
+ ColumnProjector colProj =
plan.getProjector().getColumnProjector(i);
+ Expression sourceExpression = colProj.getExpression();
+ PColumnImpl projectedColumn = new
PColumnImpl(PNameFactory.newName(colProj.getName().getBytes()),
table.getDefaultFamilyName(),
+ sourceExpression.getDataType(),
sourceExpression.getMaxLength(), sourceExpression.getScale(),
sourceExpression.isNullable(),
+ i, sourceExpression.getSortOrder(), 50, new byte[0],
true, sourceExpression.toString());
+ projectedColumns.add(projectedColumn);
+ }
+ PTable t = PTableImpl.makePTable(theTable, projectedColumns);
+ return t;
+ }
+
+ private QueryPlan buildTupleProjectPlan(QueryPlan plan) throws
SQLException {
--- End diff --
See above comments about buildTupleProjectPlan(QueryPlan plan).
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