Examples with SubqueryParseNode org.apache.phoenix.parse.SubqueryParseNode used on opensource projects

Example 6 with SubqueryParseNode

use of org.apache.phoenix.parse.SubqueryParseNode in project phoenix by apache.

the class QueryCompiler method compileSingleFlatQuery.

protected QueryPlan compileSingleFlatQuery(StatementContext context, SelectStatement select, List<Object> binds, boolean asSubquery, boolean allowPageFilter, QueryPlan innerPlan, TupleProjector innerPlanTupleProjector, boolean isInRowKeyOrder) throws SQLException {
    PTable projectedTable = null;
    if (this.projectTuples) {
        projectedTable = TupleProjectionCompiler.createProjectedTable(select, context);
        if (projectedTable != null) {
            context.setResolver(FromCompiler.getResolverForProjectedTable(projectedTable, context.getConnection(), select.getUdfParseNodes()));
        }
    }
    ColumnResolver resolver = context.getResolver();
    TableRef tableRef = context.getCurrentTable();
    PTable table = tableRef.getTable();
    ParseNode viewWhere = null;
    if (table.getViewStatement() != null) {
        viewWhere = new SQLParser(table.getViewStatement()).parseQuery().getWhere();
    }
    Integer limit = LimitCompiler.compile(context, select);
    Integer offset = OffsetCompiler.compile(context, select);
    GroupBy groupBy = GroupByCompiler.compile(context, select, isInRowKeyOrder);
    // Optimize the HAVING clause by finding any group by expressions that can be moved
    // to the WHERE clause
    select = HavingCompiler.rewrite(context, select, groupBy);
    Expression having = HavingCompiler.compile(context, select, groupBy);
    // expressions as group by key expressions since they're pre, not post filtered.
    if (innerPlan == null && !tableRef.equals(resolver.getTables().get(0))) {
        context.setResolver(FromCompiler.getResolver(context.getConnection(), tableRef, select.getUdfParseNodes()));
    }
    Set<SubqueryParseNode> subqueries = Sets.<SubqueryParseNode>newHashSet();
    Expression where = WhereCompiler.compile(context, select, viewWhere, subqueries);
    // Recompile GROUP BY now that we've figured out our ScanRanges so we know
    // definitively whether or not we'll traverse in row key order.
    groupBy = groupBy.compile(context, innerPlanTupleProjector);
    // recover resolver
    context.setResolver(resolver);
    RowProjector projector = ProjectionCompiler.compile(context, select, groupBy, asSubquery ? Collections.<PDatum>emptyList() : targetColumns, where);
    OrderBy orderBy = OrderByCompiler.compile(context, select, groupBy, limit, offset, projector, groupBy == GroupBy.EMPTY_GROUP_BY ? innerPlanTupleProjector : null, isInRowKeyOrder);
    context.getAggregationManager().compile(context, groupBy);
    // Final step is to build the query plan
    if (!asSubquery) {
        int maxRows = statement.getMaxRows();
        if (maxRows > 0) {
            if (limit != null) {
                limit = Math.min(limit, maxRows);
            } else {
                limit = maxRows;
            }
        }
    }
    if (projectedTable != null) {
        TupleProjector.serializeProjectorIntoScan(context.getScan(), new TupleProjector(projectedTable));
    }
    QueryPlan plan = innerPlan;
    QueryPlan dataPlan = dataPlans.get(tableRef);
    if (plan == null) {
        ParallelIteratorFactory parallelIteratorFactory = asSubquery ? null : this.parallelIteratorFactory;
        plan = select.getFrom() == null ? new LiteralResultIterationPlan(context, select, tableRef, projector, limit, offset, orderBy, parallelIteratorFactory) : (select.isAggregate() || select.isDistinct() ? new AggregatePlan(context, select, tableRef, projector, limit, offset, orderBy, parallelIteratorFactory, groupBy, having, dataPlan) : new ScanPlan(context, select, tableRef, projector, limit, offset, orderBy, parallelIteratorFactory, allowPageFilter, dataPlan));
    }
    SelectStatement planSelect = asSubquery ? select : this.select;
    if (!subqueries.isEmpty()) {
        int count = subqueries.size();
        WhereClauseSubPlan[] subPlans = new WhereClauseSubPlan[count];
        int i = 0;
        for (SubqueryParseNode subqueryNode : subqueries) {
            SelectStatement stmt = subqueryNode.getSelectNode();
            subPlans[i++] = new WhereClauseSubPlan(compileSubquery(stmt, false), stmt, subqueryNode.expectSingleRow());
        }
        plan = HashJoinPlan.create(planSelect, plan, null, subPlans);
    }
    if (innerPlan != null) {
        if (LiteralExpression.isTrue(where)) {
            // we do not pass "true" as filter
            where = null;
        }
        plan = select.isAggregate() || select.isDistinct() ? new ClientAggregatePlan(context, planSelect, tableRef, projector, limit, offset, where, orderBy, groupBy, having, plan) : new ClientScanPlan(context, planSelect, tableRef, projector, limit, offset, where, orderBy, plan);
    }
    return plan;
}

Example 7 with SubqueryParseNode

use of org.apache.phoenix.parse.SubqueryParseNode in project phoenix by apache.

the class WhereCompiler method compile.

/**
 * Optimize scan ranges by applying dynamically generated filter expressions.
 * @param context the shared context during query compilation
 * @param statement TODO
 * @throws SQLException if mismatched types are found, bind value do not match binds,
 * or invalid function arguments are encountered.
 * @throws SQLFeatureNotSupportedException if an unsupported expression is encountered.
 * @throws ColumnNotFoundException if column name could not be resolved
 * @throws AmbiguousColumnException if an unaliased column name is ambiguous across multiple tables
 */
public static Expression compile(StatementContext context, FilterableStatement statement, ParseNode viewWhere, List<Expression> dynamicFilters, boolean hashJoinOptimization, Set<SubqueryParseNode> subqueryNodes) throws SQLException {
    ParseNode where = statement.getWhere();
    if (subqueryNodes != null) {
        // if the subqueryNodes passed in is null, we assume there will be no sub-queries in the WHERE clause.
        SubqueryParseNodeVisitor subqueryVisitor = new SubqueryParseNodeVisitor(context, subqueryNodes);
        if (where != null) {
            where.accept(subqueryVisitor);
        }
        if (viewWhere != null) {
            viewWhere.accept(subqueryVisitor);
        }
        if (!subqueryNodes.isEmpty()) {
            return null;
        }
    }
    Set<Expression> extractedNodes = Sets.<Expression>newHashSet();
    WhereExpressionCompiler whereCompiler = new WhereExpressionCompiler(context);
    Expression expression = where == null ? LiteralExpression.newConstant(true, PBoolean.INSTANCE, Determinism.ALWAYS) : where.accept(whereCompiler);
    if (whereCompiler.isAggregate()) {
        throw new SQLExceptionInfo.Builder(SQLExceptionCode.AGGREGATE_IN_WHERE).build().buildException();
    }
    if (expression.getDataType() != PBoolean.INSTANCE) {
        throw TypeMismatchException.newException(PBoolean.INSTANCE, expression.getDataType(), expression.toString());
    }
    if (viewWhere != null) {
        WhereExpressionCompiler viewWhereCompiler = new WhereExpressionCompiler(context, true);
        Expression viewExpression = viewWhere.accept(viewWhereCompiler);
        expression = AndExpression.create(Lists.newArrayList(expression, viewExpression));
    }
    if (!dynamicFilters.isEmpty()) {
        List<Expression> filters = Lists.newArrayList(expression);
        filters.addAll(dynamicFilters);
        expression = AndExpression.create(filters);
    }
    if (context.getCurrentTable().getTable().getType() != PTableType.PROJECTED && context.getCurrentTable().getTable().getType() != PTableType.SUBQUERY) {
        expression = WhereOptimizer.pushKeyExpressionsToScan(context, statement, expression, extractedNodes);
    }
    setScanFilter(context, statement, expression, whereCompiler.disambiguateWithFamily, hashJoinOptimization);
    return expression;
}