@Override public LogicalNode visitSimpleTableSubquery(LogicalPlanner.PlanContext ctx, Stack<Expr> stack, SimpleTableSubquery expr) throws TajoException { LogicalPlanner.PlanContext newContext; // Note: TableSubQuery always has a table name. // SELECT .... FROM (SELECT ...) TB_NAME <- QueryBlock queryBlock = ctx.getPlan().newQueryBlock(); newContext = new LogicalPlanner.PlanContext(ctx, queryBlock); LogicalNode child = super.visitSimpleTableSubquery(newContext, stack, expr); queryBlock.setRoot(child); // a table subquery should be dealt as a relation. TableSubQueryNode node = ctx.getPlan().createNode(TableSubQueryNode.class); node.init(IdentifierUtil.buildFQName(ctx.getQueryContext().get(SessionVars.CURRENT_DATABASE), ctx.generateUniqueSubQueryName()), child); ctx.getQueryBlock().addRelation(node); if (stack.peek().getType() == OpType.InPredicate) { // In-subquery and scalar subquery cannot be the base for name resolution. node.setNameResolveBase(false); } return node; }
@Override public LogicalNode visitSimpleTableSubquery(LogicalPlanner.PlanContext ctx, Stack<Expr> stack, SimpleTableSubquery expr) throws TajoException { LogicalPlanner.PlanContext newContext; // Note: TableSubQuery always has a table name. // SELECT .... FROM (SELECT ...) TB_NAME <- QueryBlock queryBlock = ctx.getPlan().newQueryBlock(); newContext = new LogicalPlanner.PlanContext(ctx, queryBlock); LogicalNode child = super.visitSimpleTableSubquery(newContext, stack, expr); queryBlock.setRoot(child); // a table subquery should be dealt as a relation. TableSubQueryNode node = ctx.getPlan().createNode(TableSubQueryNode.class); node.init(CatalogUtil.buildFQName(ctx.getQueryContext().get(SessionVars.CURRENT_DATABASE), ctx.generateUniqueSubQueryName()), child); ctx.getQueryBlock().addRelation(node); if (stack.peek().getType() == OpType.InPredicate) { // In-subquery and scalar subquery cannot be the base for name resolution. node.setNameResolveBase(false); } return node; }
context.generateUniqueSubQueryName()), setOperationNode); setTargetOfTableSubQuery(context, currentBlock, setOpTableSubQueryNode); currentBlock.registerNode(setOpTableSubQueryNode);
context.generateUniqueSubQueryName()), setOperationNode); setTargetOfTableSubQuery(context, currentBlock, setOpTableSubQueryNode); currentBlock.registerNode(setOpTableSubQueryNode);