| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.phoenix.compile; |
| |
| import java.sql.SQLException; |
| import java.sql.SQLFeatureNotSupportedException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.hadoop.hbase.client.Scan; |
| import org.apache.hadoop.hbase.util.Pair; |
| import org.apache.phoenix.compile.GroupByCompiler.GroupBy; |
| import org.apache.phoenix.compile.JoinCompiler.JoinSpec; |
| import org.apache.phoenix.compile.JoinCompiler.JoinTable; |
| import org.apache.phoenix.compile.JoinCompiler.Table; |
| import org.apache.phoenix.compile.OrderByCompiler.OrderBy; |
| import org.apache.phoenix.execute.AggregatePlan; |
| import org.apache.phoenix.execute.ClientAggregatePlan; |
| import org.apache.phoenix.execute.ClientScanPlan; |
| import org.apache.phoenix.execute.HashJoinPlan; |
| import org.apache.phoenix.execute.HashJoinPlan.HashSubPlan; |
| import org.apache.phoenix.execute.HashJoinPlan.WhereClauseSubPlan; |
| import org.apache.phoenix.execute.LiteralResultIterationPlan; |
| import org.apache.phoenix.execute.ScanPlan; |
| import org.apache.phoenix.execute.SortMergeJoinPlan; |
| import org.apache.phoenix.execute.TupleProjectionPlan; |
| import org.apache.phoenix.execute.TupleProjector; |
| import org.apache.phoenix.execute.UnionPlan; |
| import org.apache.phoenix.expression.Expression; |
| import org.apache.phoenix.expression.LiteralExpression; |
| import org.apache.phoenix.expression.RowValueConstructorExpression; |
| import org.apache.phoenix.hbase.index.util.ImmutableBytesPtr; |
| import org.apache.phoenix.iterate.ParallelIteratorFactory; |
| import org.apache.phoenix.jdbc.PhoenixConnection; |
| import org.apache.phoenix.jdbc.PhoenixDatabaseMetaData; |
| import org.apache.phoenix.jdbc.PhoenixStatement; |
| import org.apache.phoenix.join.HashJoinInfo; |
| import org.apache.phoenix.parse.AliasedNode; |
| import org.apache.phoenix.parse.EqualParseNode; |
| import org.apache.phoenix.parse.HintNode.Hint; |
| import org.apache.phoenix.parse.JoinTableNode.JoinType; |
| import org.apache.phoenix.parse.OrderByNode; |
| import org.apache.phoenix.parse.ParseNode; |
| import org.apache.phoenix.parse.ParseNodeFactory; |
| import org.apache.phoenix.parse.SQLParser; |
| import org.apache.phoenix.parse.SelectStatement; |
| import org.apache.phoenix.parse.SubqueryParseNode; |
| import org.apache.phoenix.parse.TableNode; |
| import org.apache.phoenix.query.QueryConstants; |
| import org.apache.phoenix.schema.AmbiguousColumnException; |
| import org.apache.phoenix.schema.ColumnNotFoundException; |
| import org.apache.phoenix.schema.PDatum; |
| import org.apache.phoenix.schema.PTable; |
| import org.apache.phoenix.schema.TableNotFoundException; |
| import org.apache.phoenix.schema.TableRef; |
| import org.apache.phoenix.util.QueryUtil; |
| import org.apache.phoenix.util.ScanUtil; |
| |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| |
| |
| /** |
| * |
| * Class used to build an executable query plan |
| * |
| * |
| * @since 0.1 |
| */ |
| public class QueryCompiler { |
| private static final ParseNodeFactory NODE_FACTORY = new ParseNodeFactory(); |
| /* |
| * Not using Scan.setLoadColumnFamiliesOnDemand(true) because we don't |
| * want to introduce a dependency on 0.94.5 (where this feature was |
| * introduced). This will do the same thing. Once we do have a |
| * dependency on 0.94.5 or above, switch this around. |
| */ |
| private static final String LOAD_COLUMN_FAMILIES_ON_DEMAND_ATTR = "_ondemand_"; |
| private final PhoenixStatement statement; |
| private final Scan scan; |
| private final Scan originalScan; |
| private final ColumnResolver resolver; |
| private final SelectStatement select; |
| private final List<? extends PDatum> targetColumns; |
| private final ParallelIteratorFactory parallelIteratorFactory; |
| private final SequenceManager sequenceManager; |
| private final boolean projectTuples; |
| private final boolean useSortMergeJoin; |
| private final boolean noChildParentJoinOptimization; |
| |
| public QueryCompiler(PhoenixStatement statement, SelectStatement select, ColumnResolver resolver) throws SQLException { |
| this(statement, select, resolver, Collections.<PDatum>emptyList(), null, new SequenceManager(statement), true); |
| } |
| |
| public QueryCompiler(PhoenixStatement statement, SelectStatement select, ColumnResolver resolver, boolean projectTuples) throws SQLException { |
| this(statement, select, resolver, Collections.<PDatum>emptyList(), null, new SequenceManager(statement), projectTuples); |
| } |
| |
| public QueryCompiler(PhoenixStatement statement, SelectStatement select, ColumnResolver resolver, List<? extends PDatum> targetColumns, ParallelIteratorFactory parallelIteratorFactory, SequenceManager sequenceManager, boolean projectTuples) throws SQLException { |
| this.statement = statement; |
| this.select = select; |
| this.resolver = resolver; |
| this.scan = new Scan(); |
| this.targetColumns = targetColumns; |
| this.parallelIteratorFactory = parallelIteratorFactory; |
| this.sequenceManager = sequenceManager; |
| this.projectTuples = projectTuples; |
| this.useSortMergeJoin = select.getHint().hasHint(Hint.USE_SORT_MERGE_JOIN); |
| this.noChildParentJoinOptimization = select.getHint().hasHint(Hint.NO_CHILD_PARENT_JOIN_OPTIMIZATION); |
| if (statement.getConnection().getQueryServices().getLowestClusterHBaseVersion() >= PhoenixDatabaseMetaData.ESSENTIAL_FAMILY_VERSION_THRESHOLD) { |
| this.scan.setAttribute(LOAD_COLUMN_FAMILIES_ON_DEMAND_ATTR, QueryConstants.TRUE); |
| } |
| if (select.getHint().hasHint(Hint.NO_CACHE)) { |
| scan.setCacheBlocks(false); |
| } |
| |
| scan.setCaching(statement.getFetchSize()); |
| this.originalScan = ScanUtil.newScan(scan); |
| } |
| |
| public QueryCompiler(PhoenixStatement statement, SelectStatement select, ColumnResolver resolver, List<? extends PDatum> targetColumns, ParallelIteratorFactory parallelIteratorFactory, SequenceManager sequenceManager) throws SQLException { |
| this(statement, select, resolver, targetColumns, parallelIteratorFactory, sequenceManager, true); |
| } |
| |
| /** |
| * Builds an executable query plan from a parsed SQL statement |
| * @return executable query plan |
| * @throws SQLException if mismatched types are found, bind value do not match binds, |
| * or invalid function arguments are encountered. |
| * @throws SQLFeatureNotSupportedException if an unsupported construct is encountered |
| * @throws TableNotFoundException if table name not found in schema |
| * @throws ColumnNotFoundException if column name could not be resolved |
| * @throws AmbiguousColumnException if an unaliased column name is ambiguous across multiple tables |
| */ |
| public QueryPlan compile() throws SQLException{ |
| QueryPlan plan; |
| if (select.isUnion()) { |
| plan = compileUnionAll(select); |
| } else { |
| plan = compileSelect(select); |
| } |
| return plan; |
| } |
| |
| public QueryPlan compileUnionAll(SelectStatement select) throws SQLException { |
| List<SelectStatement> unionAllSelects = select.getSelects(); |
| List<QueryPlan> plans = new ArrayList<QueryPlan>(); |
| |
| for (int i=0; i < unionAllSelects.size(); i++ ) { |
| SelectStatement subSelect = unionAllSelects.get(i); |
| // Push down order-by and limit into sub-selects. |
| if (!select.getOrderBy().isEmpty() || select.getLimit() != null) { |
| if (select.getOffset() == null) { |
| subSelect = NODE_FACTORY.select(subSelect, select.getOrderBy(), select.getLimit(), null); |
| } else { |
| subSelect = NODE_FACTORY.select(subSelect, select.getOrderBy(), null, null); |
| } |
| } |
| QueryPlan subPlan = compileSubquery(subSelect, true); |
| plans.add(subPlan); |
| } |
| TableRef tableRef = UnionCompiler.contructSchemaTable(statement, plans, |
| select.hasWildcard() ? null : select.getSelect()); |
| ColumnResolver resolver = FromCompiler.getResolver(tableRef); |
| StatementContext context = new StatementContext(statement, resolver, scan, sequenceManager); |
| QueryPlan plan = compileSingleFlatQuery(context, select, statement.getParameters(), false, false, null, null, false); |
| plan = new UnionPlan(context, select, tableRef, plan.getProjector(), plan.getLimit(), |
| plan.getOffset(), plan.getOrderBy(), GroupBy.EMPTY_GROUP_BY, plans, |
| context.getBindManager().getParameterMetaData()); |
| return plan; |
| } |
| |
| public QueryPlan compileSelect(SelectStatement select) throws SQLException{ |
| List<Object> binds = statement.getParameters(); |
| StatementContext context = new StatementContext(statement, resolver, scan, sequenceManager); |
| if (select.isJoin()) { |
| select = JoinCompiler.optimize(statement, select, resolver); |
| if (this.select != select) { |
| ColumnResolver resolver = FromCompiler.getResolverForQuery(select, statement.getConnection()); |
| context = new StatementContext(statement, resolver, 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); |
| } |
| } |
| |
| /* |
| * Call compileJoinQuery() for join queries recursively down to the leaf JoinTable nodes. |
| * This matches the input JoinTable node against patterns in the following order: |
| * 1. A (leaf JoinTable node, which can be a named table reference or a subquery of any kind.) |
| * Returns the compilation result of a single table scan or of an independent subquery. |
| * 2. Matching either of (when hint USE_SORT_MERGE_JOIN not specified): |
| * 1) A LEFT/INNER JOIN B |
| * 2) A LEFT/INNER JOIN B (LEFT/INNER JOIN C)+, if hint NO_STAR_JOIN not specified |
| * where A can be a named table reference or a flat subquery, and B, C, ... can be a named |
| * table reference, a sub-join or a subquery of any kind. |
| * Returns a HashJoinPlan{scan: A, hash: B, C, ...}. |
| * 3. Matching pattern: |
| * A RIGHT/INNER JOIN B (when hint USE_SORT_MERGE_JOIN not specified) |
| * where B can be a named table reference or a flat subquery, and A can be a named table |
| * reference, a sub-join or a subquery of any kind. |
| * Returns a HashJoinPlan{scan: B, hash: A}. |
| * NOTE that "A LEFT/RIGHT/INNER/FULL JOIN B RIGHT/INNER JOIN C" is viewed as |
| * "(A LEFT/RIGHT/INNER/FULL JOIN B) RIGHT/INNER JOIN C" here, which means the left part in the |
| * parenthesis is considered a sub-join. |
| * viewed as a sub-join. |
| * 4. All the rest that do not qualify for previous patterns or conditions, including FULL joins. |
| * Returns a SortMergeJoinPlan, the sorting part of which is pushed down to the JoinTable nodes |
| * of both sides as order-by clauses. |
| * NOTE that SEMI or ANTI joins are treated the same way as LEFT joins in JoinTable pattern matching. |
| * |
| * If no join algorithm hint is provided, according to the above compilation process, a join query |
| * plan can probably consist of both HashJoinPlan and SortMergeJoinPlan which may enclose each other. |
| * TODO 1) Use table statistics to guide the choice of join plans. |
| * 2) Make it possible to hint a certain join algorithm for a specific join step. |
| */ |
| @SuppressWarnings("unchecked") |
| protected QueryPlan compileJoinQuery(StatementContext context, List<Object> binds, JoinTable joinTable, boolean asSubquery, boolean projectPKColumns, List<OrderByNode> orderBy) throws SQLException { |
| byte[] emptyByteArray = new byte[0]; |
| List<JoinSpec> joinSpecs = joinTable.getJoinSpecs(); |
| if (joinSpecs.isEmpty()) { |
| Table table = joinTable.getTable(); |
| SelectStatement subquery = table.getAsSubquery(orderBy); |
| if (!table.isSubselect()) { |
| context.setCurrentTable(table.getTableRef()); |
| PTable projectedTable = table.createProjectedTable(!projectPKColumns, context); |
| TupleProjector projector = new TupleProjector(projectedTable); |
| TupleProjector.serializeProjectorIntoScan(context.getScan(), projector); |
| context.setResolver(FromCompiler.getResolverForProjectedTable(projectedTable, context.getConnection(), subquery.getUdfParseNodes())); |
| table.projectColumns(context.getScan()); |
| return compileSingleFlatQuery(context, subquery, binds, asSubquery, !asSubquery, null, projectPKColumns ? projector : null, true); |
| } |
| QueryPlan plan = compileSubquery(subquery, false); |
| PTable projectedTable = table.createProjectedTable(plan.getProjector()); |
| context.setResolver(FromCompiler.getResolverForProjectedTable(projectedTable, context.getConnection(), subquery.getUdfParseNodes())); |
| return new TupleProjectionPlan(plan, new TupleProjector(plan.getProjector()), table.compilePostFilterExpression(context)); |
| } |
| |
| boolean[] starJoinVector; |
| if (!this.useSortMergeJoin && (starJoinVector = joinTable.getStarJoinVector()) != null) { |
| Table table = joinTable.getTable(); |
| PTable initialProjectedTable; |
| TableRef tableRef; |
| SelectStatement query; |
| TupleProjector tupleProjector; |
| if (!table.isSubselect()) { |
| context.setCurrentTable(table.getTableRef()); |
| initialProjectedTable = table.createProjectedTable(!projectPKColumns, context); |
| tableRef = table.getTableRef(); |
| table.projectColumns(context.getScan()); |
| query = joinTable.getAsSingleSubquery(table.getAsSubquery(orderBy), asSubquery); |
| tupleProjector = new TupleProjector(initialProjectedTable); |
| } else { |
| SelectStatement subquery = table.getAsSubquery(orderBy); |
| QueryPlan plan = compileSubquery(subquery, false); |
| initialProjectedTable = table.createProjectedTable(plan.getProjector()); |
| tableRef = plan.getTableRef(); |
| context.getScan().setFamilyMap(plan.getContext().getScan().getFamilyMap()); |
| query = joinTable.getAsSingleSubquery((SelectStatement) plan.getStatement(), asSubquery); |
| tupleProjector = new TupleProjector(plan.getProjector()); |
| } |
| context.setCurrentTable(tableRef); |
| PTable projectedTable = initialProjectedTable; |
| int count = joinSpecs.size(); |
| ImmutableBytesPtr[] joinIds = new ImmutableBytesPtr[count]; |
| List<Expression>[] joinExpressions = new List[count]; |
| JoinType[] joinTypes = new JoinType[count]; |
| PTable[] tables = new PTable[count]; |
| int[] fieldPositions = new int[count]; |
| StatementContext[] subContexts = new StatementContext[count]; |
| QueryPlan[] subPlans = new QueryPlan[count]; |
| HashSubPlan[] hashPlans = new HashSubPlan[count]; |
| fieldPositions[0] = projectedTable.getColumns().size() - projectedTable.getPKColumns().size(); |
| for (int i = 0; i < count; i++) { |
| JoinSpec joinSpec = joinSpecs.get(i); |
| Scan subScan = ScanUtil.newScan(originalScan); |
| subContexts[i] = new StatementContext(statement, context.getResolver(), subScan, new SequenceManager(statement)); |
| subPlans[i] = compileJoinQuery(subContexts[i], binds, joinSpec.getJoinTable(), true, true, null); |
| boolean hasPostReference = joinSpec.getJoinTable().hasPostReference(); |
| if (hasPostReference) { |
| tables[i] = subContexts[i].getResolver().getTables().get(0).getTable(); |
| projectedTable = JoinCompiler.joinProjectedTables(projectedTable, tables[i], joinSpec.getType()); |
| } else { |
| tables[i] = null; |
| } |
| } |
| for (int i = 0; i < count; i++) { |
| JoinSpec joinSpec = joinSpecs.get(i); |
| context.setResolver(FromCompiler.getResolverForProjectedTable(projectedTable, context.getConnection(), query.getUdfParseNodes())); |
| joinIds[i] = new ImmutableBytesPtr(emptyByteArray); // place-holder |
| Pair<List<Expression>, List<Expression>> joinConditions = joinSpec.compileJoinConditions(context, subContexts[i], true); |
| joinExpressions[i] = joinConditions.getFirst(); |
| List<Expression> hashExpressions = joinConditions.getSecond(); |
| Pair<Expression, Expression> keyRangeExpressions = new Pair<Expression, Expression>(null, null); |
| boolean optimized = getKeyExpressionCombinations(keyRangeExpressions, context, joinTable.getStatement(), tableRef, joinSpec.getType(), joinExpressions[i], hashExpressions); |
| Expression keyRangeLhsExpression = keyRangeExpressions.getFirst(); |
| Expression keyRangeRhsExpression = keyRangeExpressions.getSecond(); |
| joinTypes[i] = joinSpec.getType(); |
| if (i < count - 1) { |
| fieldPositions[i + 1] = fieldPositions[i] + (tables[i] == null ? 0 : (tables[i].getColumns().size() - tables[i].getPKColumns().size())); |
| } |
| hashPlans[i] = new HashSubPlan(i, subPlans[i], optimized ? null : hashExpressions, joinSpec.isSingleValueOnly(), keyRangeLhsExpression, keyRangeRhsExpression); |
| } |
| TupleProjector.serializeProjectorIntoScan(context.getScan(), tupleProjector); |
| QueryPlan plan = compileSingleFlatQuery(context, query, binds, asSubquery, !asSubquery && joinTable.isAllLeftJoin(), null, !table.isSubselect() && projectPKColumns ? tupleProjector : null, true); |
| Expression postJoinFilterExpression = joinTable.compilePostFilterExpression(context, table); |
| Integer limit = null; |
| Integer offset = null; |
| if (!query.isAggregate() && !query.isDistinct() && query.getOrderBy().isEmpty()) { |
| limit = plan.getLimit(); |
| offset = plan.getOffset(); |
| } |
| HashJoinInfo joinInfo = new HashJoinInfo(projectedTable, joinIds, joinExpressions, joinTypes, |
| starJoinVector, tables, fieldPositions, postJoinFilterExpression, QueryUtil.getOffsetLimit(limit, offset)); |
| return HashJoinPlan.create(joinTable.getStatement(), plan, joinInfo, hashPlans); |
| } |
| |
| JoinSpec lastJoinSpec = joinSpecs.get(joinSpecs.size() - 1); |
| JoinType type = lastJoinSpec.getType(); |
| if (!this.useSortMergeJoin |
| && (type == JoinType.Right || type == JoinType.Inner) |
| && lastJoinSpec.getJoinTable().getJoinSpecs().isEmpty() |
| && lastJoinSpec.getJoinTable().getTable().isFlat()) { |
| JoinTable rhsJoinTable = lastJoinSpec.getJoinTable(); |
| Table rhsTable = rhsJoinTable.getTable(); |
| JoinTable lhsJoin = joinTable.getSubJoinTableWithoutPostFilters(); |
| Scan subScan = ScanUtil.newScan(originalScan); |
| StatementContext lhsCtx = new StatementContext(statement, context.getResolver(), subScan, new SequenceManager(statement)); |
| QueryPlan lhsPlan = compileJoinQuery(lhsCtx, binds, lhsJoin, true, true, null); |
| PTable rhsProjTable; |
| TableRef rhsTableRef; |
| SelectStatement rhs; |
| TupleProjector tupleProjector; |
| if (!rhsTable.isSubselect()) { |
| context.setCurrentTable(rhsTable.getTableRef()); |
| rhsProjTable = rhsTable.createProjectedTable(!projectPKColumns, context); |
| rhsTableRef = rhsTable.getTableRef(); |
| rhsTable.projectColumns(context.getScan()); |
| rhs = rhsJoinTable.getAsSingleSubquery(rhsTable.getAsSubquery(orderBy), asSubquery); |
| tupleProjector = new TupleProjector(rhsProjTable); |
| } else { |
| SelectStatement subquery = rhsTable.getAsSubquery(orderBy); |
| QueryPlan plan = compileSubquery(subquery, false); |
| rhsProjTable = rhsTable.createProjectedTable(plan.getProjector()); |
| rhsTableRef = plan.getTableRef(); |
| context.getScan().setFamilyMap(plan.getContext().getScan().getFamilyMap()); |
| rhs = rhsJoinTable.getAsSingleSubquery((SelectStatement) plan.getStatement(), asSubquery); |
| tupleProjector = new TupleProjector(plan.getProjector()); |
| } |
| context.setCurrentTable(rhsTableRef); |
| context.setResolver(FromCompiler.getResolverForProjectedTable(rhsProjTable, context.getConnection(), rhs.getUdfParseNodes())); |
| ImmutableBytesPtr[] joinIds = new ImmutableBytesPtr[] {new ImmutableBytesPtr(emptyByteArray)}; |
| Pair<List<Expression>, List<Expression>> joinConditions = lastJoinSpec.compileJoinConditions(lhsCtx, context, true); |
| List<Expression> joinExpressions = joinConditions.getSecond(); |
| List<Expression> hashExpressions = joinConditions.getFirst(); |
| boolean needsMerge = lhsJoin.hasPostReference(); |
| PTable lhsTable = needsMerge ? lhsCtx.getResolver().getTables().get(0).getTable() : null; |
| int fieldPosition = needsMerge ? rhsProjTable.getColumns().size() - rhsProjTable.getPKColumns().size() : 0; |
| PTable projectedTable = needsMerge ? JoinCompiler.joinProjectedTables(rhsProjTable, lhsTable, type == JoinType.Right ? JoinType.Left : type) : rhsProjTable; |
| TupleProjector.serializeProjectorIntoScan(context.getScan(), tupleProjector); |
| context.setResolver(FromCompiler.getResolverForProjectedTable(projectedTable, context.getConnection(), rhs.getUdfParseNodes())); |
| QueryPlan rhsPlan = compileSingleFlatQuery(context, rhs, binds, asSubquery, !asSubquery && type == JoinType.Right, null, !rhsTable.isSubselect() && projectPKColumns ? tupleProjector : null, true); |
| Expression postJoinFilterExpression = joinTable.compilePostFilterExpression(context, rhsTable); |
| Integer limit = null; |
| Integer offset = null; |
| if (!rhs.isAggregate() && !rhs.isDistinct() && rhs.getOrderBy().isEmpty()) { |
| limit = rhsPlan.getLimit(); |
| offset = rhsPlan.getOffset(); |
| } |
| HashJoinInfo joinInfo = new HashJoinInfo(projectedTable, joinIds, new List[] { joinExpressions }, |
| new JoinType[] { type == JoinType.Right ? JoinType.Left : type }, new boolean[] { true }, |
| new PTable[] { lhsTable }, new int[] { fieldPosition }, postJoinFilterExpression, QueryUtil.getOffsetLimit(limit, offset)); |
| Pair<Expression, Expression> keyRangeExpressions = new Pair<Expression, Expression>(null, null); |
| getKeyExpressionCombinations(keyRangeExpressions, context, joinTable.getStatement(), rhsTableRef, type, joinExpressions, hashExpressions); |
| return HashJoinPlan.create(joinTable.getStatement(), rhsPlan, joinInfo, new HashSubPlan[] {new HashSubPlan(0, lhsPlan, hashExpressions, false, keyRangeExpressions.getFirst(), keyRangeExpressions.getSecond())}); |
| } |
| |
| JoinTable lhsJoin = joinTable.getSubJoinTableWithoutPostFilters(); |
| JoinTable rhsJoin = lastJoinSpec.getJoinTable(); |
| if (type == JoinType.Right) { |
| JoinTable temp = lhsJoin; |
| lhsJoin = rhsJoin; |
| rhsJoin = temp; |
| } |
| |
| List<EqualParseNode> joinConditionNodes = lastJoinSpec.getOnConditions(); |
| List<OrderByNode> lhsOrderBy = Lists.<OrderByNode> newArrayListWithExpectedSize(joinConditionNodes.size()); |
| List<OrderByNode> rhsOrderBy = Lists.<OrderByNode> newArrayListWithExpectedSize(joinConditionNodes.size()); |
| for (EqualParseNode condition : joinConditionNodes) { |
| lhsOrderBy.add(NODE_FACTORY.orderBy(type == JoinType.Right ? condition.getRHS() : condition.getLHS(), false, true)); |
| rhsOrderBy.add(NODE_FACTORY.orderBy(type == JoinType.Right ? condition.getLHS() : condition.getRHS(), false, true)); |
| } |
| |
| Scan lhsScan = ScanUtil.newScan(originalScan); |
| StatementContext lhsCtx = new StatementContext(statement, context.getResolver(), lhsScan, new SequenceManager(statement)); |
| boolean preserveRowkey = !projectPKColumns && type != JoinType.Full; |
| QueryPlan lhsPlan = compileJoinQuery(lhsCtx, binds, lhsJoin, true, !preserveRowkey, lhsOrderBy); |
| PTable lhsProjTable = lhsCtx.getResolver().getTables().get(0).getTable(); |
| boolean isInRowKeyOrder = preserveRowkey && lhsPlan.getOrderBy().getOrderByExpressions().isEmpty(); |
| |
| Scan rhsScan = ScanUtil.newScan(originalScan); |
| StatementContext rhsCtx = new StatementContext(statement, context.getResolver(), rhsScan, new SequenceManager(statement)); |
| QueryPlan rhsPlan = compileJoinQuery(rhsCtx, binds, rhsJoin, true, true, rhsOrderBy); |
| PTable rhsProjTable = rhsCtx.getResolver().getTables().get(0).getTable(); |
| |
| Pair<List<Expression>, List<Expression>> joinConditions = lastJoinSpec.compileJoinConditions(type == JoinType.Right ? rhsCtx : lhsCtx, type == JoinType.Right ? lhsCtx : rhsCtx, false); |
| List<Expression> lhsKeyExpressions = type == JoinType.Right ? joinConditions.getSecond() : joinConditions.getFirst(); |
| List<Expression> rhsKeyExpressions = type == JoinType.Right ? joinConditions.getFirst() : joinConditions.getSecond(); |
| |
| boolean needsMerge = rhsJoin.hasPostReference(); |
| int fieldPosition = needsMerge ? lhsProjTable.getColumns().size() - lhsProjTable.getPKColumns().size() : 0; |
| PTable projectedTable = needsMerge ? JoinCompiler.joinProjectedTables(lhsProjTable, rhsProjTable, type == JoinType.Right ? JoinType.Left : type) : lhsProjTable; |
| |
| ColumnResolver resolver = FromCompiler.getResolverForProjectedTable(projectedTable, context.getConnection(), joinTable.getStatement().getUdfParseNodes()); |
| TableRef tableRef = resolver.getTables().get(0); |
| StatementContext subCtx = new StatementContext(statement, resolver, ScanUtil.newScan(originalScan), new SequenceManager(statement)); |
| subCtx.setCurrentTable(tableRef); |
| QueryPlan innerPlan = new SortMergeJoinPlan(subCtx, joinTable.getStatement(), tableRef, type == JoinType.Right ? JoinType.Left : type, lhsPlan, rhsPlan, lhsKeyExpressions, rhsKeyExpressions, projectedTable, lhsProjTable, needsMerge ? rhsProjTable : null, fieldPosition, lastJoinSpec.isSingleValueOnly()); |
| context.setCurrentTable(tableRef); |
| context.setResolver(resolver); |
| TableNode from = NODE_FACTORY.namedTable(tableRef.getTableAlias(), NODE_FACTORY.table(tableRef.getTable().getSchemaName().getString(), tableRef.getTable().getTableName().getString())); |
| ParseNode where = joinTable.getPostFiltersCombined(); |
| SelectStatement select = asSubquery |
| ? NODE_FACTORY.select(from, joinTable.getStatement().getHint(), false, |
| Collections.<AliasedNode> emptyList(), where, null, null, orderBy, null, null, 0, false, |
| joinTable.getStatement().hasSequence(), Collections.<SelectStatement> emptyList(), |
| joinTable.getStatement().getUdfParseNodes()) |
| : NODE_FACTORY.select(joinTable.getStatement(), from, where); |
| |
| return compileSingleFlatQuery(context, select, binds, asSubquery, false, innerPlan, null, isInRowKeyOrder); |
| } |
| |
| private boolean getKeyExpressionCombinations(Pair<Expression, Expression> combination, StatementContext context, SelectStatement select, TableRef table, JoinType type, final List<Expression> joinExpressions, final List<Expression> hashExpressions) throws SQLException { |
| if ((type != JoinType.Inner && type != JoinType.Semi) || this.noChildParentJoinOptimization) |
| return false; |
| |
| Scan scanCopy = ScanUtil.newScan(context.getScan()); |
| StatementContext contextCopy = new StatementContext(statement, context.getResolver(), scanCopy, new SequenceManager(statement)); |
| contextCopy.setCurrentTable(table); |
| List<Expression> lhsCombination = Lists.<Expression> newArrayList(); |
| boolean complete = WhereOptimizer.getKeyExpressionCombination(lhsCombination, contextCopy, select, joinExpressions); |
| if (lhsCombination.isEmpty()) |
| return false; |
| |
| List<Expression> rhsCombination = Lists.newArrayListWithExpectedSize(lhsCombination.size()); |
| for (int i = 0; i < lhsCombination.size(); i++) { |
| Expression lhs = lhsCombination.get(i); |
| for (int j = 0; j < joinExpressions.size(); j++) { |
| if (lhs == joinExpressions.get(j)) { |
| rhsCombination.add(hashExpressions.get(j)); |
| break; |
| } |
| } |
| } |
| |
| if (lhsCombination.size() == 1) { |
| combination.setFirst(lhsCombination.get(0)); |
| combination.setSecond(rhsCombination.get(0)); |
| } else { |
| combination.setFirst(new RowValueConstructorExpression(lhsCombination, false)); |
| combination.setSecond(new RowValueConstructorExpression(rhsCombination, false)); |
| } |
| |
| return type == JoinType.Semi && complete; |
| } |
| |
| protected QueryPlan compileSubquery(SelectStatement subquery, boolean pushDownMaxRows) throws SQLException { |
| PhoenixConnection connection = this.statement.getConnection(); |
| subquery = SubselectRewriter.flatten(subquery, connection); |
| ColumnResolver resolver = FromCompiler.getResolverForQuery(subquery, connection); |
| subquery = StatementNormalizer.normalize(subquery, resolver); |
| SelectStatement transformedSubquery = SubqueryRewriter.transform(subquery, resolver, connection); |
| if (transformedSubquery != subquery) { |
| resolver = FromCompiler.getResolverForQuery(transformedSubquery, connection); |
| subquery = StatementNormalizer.normalize(transformedSubquery, resolver); |
| } |
| int maxRows = this.statement.getMaxRows(); |
| this.statement.setMaxRows(pushDownMaxRows ? maxRows : 0); // overwrite maxRows to avoid its impact on inner queries. |
| QueryPlan plan = new QueryCompiler(this.statement, subquery, resolver, false).compile(); |
| plan = statement.getConnection().getQueryServices().getOptimizer().optimize(statement, plan); |
| this.statement.setMaxRows(maxRows); // restore maxRows. |
| return plan; |
| } |
| |
| protected QueryPlan compileSingleQuery(StatementContext context, SelectStatement select, List<Object> binds, boolean asSubquery, boolean allowPageFilter) throws SQLException{ |
| SelectStatement innerSelect = select.getInnerSelectStatement(); |
| if (innerSelect == null) { |
| return compileSingleFlatQuery(context, select, binds, asSubquery, allowPageFilter, null, null, true); |
| } |
| |
| QueryPlan innerPlan = compileSubquery(innerSelect, false); |
| TupleProjector tupleProjector = new TupleProjector(innerPlan.getProjector()); |
| innerPlan = new TupleProjectionPlan(innerPlan, tupleProjector, null); |
| |
| // Replace the original resolver and table with those having compiled type info. |
| TableRef tableRef = context.getResolver().getTables().get(0); |
| ColumnResolver resolver = FromCompiler.getResolverForCompiledDerivedTable(statement.getConnection(), tableRef, innerPlan.getProjector()); |
| context.setResolver(resolver); |
| tableRef = resolver.getTables().get(0); |
| context.setCurrentTable(tableRef); |
| boolean isInRowKeyOrder = innerPlan.getGroupBy() == GroupBy.EMPTY_GROUP_BY && innerPlan.getOrderBy() == OrderBy.EMPTY_ORDER_BY; |
| |
| return compileSingleFlatQuery(context, select, binds, asSubquery, allowPageFilter, innerPlan, tupleProjector, isInRowKeyOrder); |
| } |
| |
| 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); |
| // Don't pass groupBy when building where clause expression, because we do not want to wrap these |
| // 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); |
| context.setResolver(resolver); // recover 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; |
| 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) |
| : new ScanPlan(context, select, tableRef, projector, limit, offset, orderBy, |
| parallelIteratorFactory, allowPageFilter)); |
| } |
| 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(select, plan, null, subPlans); |
| } |
| |
| if (innerPlan != null) { |
| if (LiteralExpression.isTrue(where)) { |
| where = null; // we do not pass "true" as filter |
| } |
| plan = select.isAggregate() || select.isDistinct() |
| ? new ClientAggregatePlan(context, select, tableRef, projector, limit, offset, where, orderBy, |
| groupBy, having, plan) |
| : new ClientScanPlan(context, select, tableRef, projector, limit, offset, where, orderBy, plan); |
| |
| } |
| |
| return plan; |
| } |
| } |
