Examples of com.facebook.presto.sql.tree.QualifiedNameReference

com.facebook.presto.sql.tree.QualifiedNameReference

    {
        List<Partition> partitions = splitManager.getPartitions(tableHandle, Optional.<Map<ColumnHandle, Object>>of(ImmutableMap.<ColumnHandle, Object>of(dsColumnHandle, "foo")));
        assertEquals(partitions.size(), 2);


        // ds=3. No partition will match this.
        Expression nonMatching = new ComparisonExpression(Type.EQUAL, new QualifiedNameReference(new QualifiedName("ds")), new StringLiteral("3"));
        DataSource dataSource = splitManager.getSplits(session, tableHandle, BooleanLiteral.TRUE_LITERAL, nonMatching, Predicates.<Partition>alwaysTrue(), symbols);
        List<Split> splits = ImmutableList.copyOf(dataSource.getSplits());
        // no splits found
        assertEquals(splits.size(), 0);
    }

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    {
        List<Partition> partitions = splitManager.getPartitions(tableHandle, Optional.<Map<ColumnHandle, Object>>of(ImmutableMap.<ColumnHandle, Object>of(dsColumnHandle, "1")));
        assertEquals(partitions.size(), 2);


        // ds=1. One partition with three splits will match this.
        Expression nonMatching = new ComparisonExpression(Type.EQUAL, new QualifiedNameReference(new QualifiedName("ds")), new StringLiteral("1"));
        DataSource dataSource = splitManager.getSplits(session, tableHandle, BooleanLiteral.TRUE_LITERAL, nonMatching, Predicates.<Partition>alwaysTrue(), symbols);
        List<Split> splits = ImmutableList.copyOf(dataSource.getSplits());
        // three splits found
        assertEquals(splits.size(), 3);
    }

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    {
        List<Partition> partitions = splitManager.getPartitions(tableHandle, Optional.<Map<ColumnHandle, Object>>of(ImmutableMap.<ColumnHandle, Object>of(dsColumnHandle, "foo")));
        assertEquals(partitions.size(), 2);


        // foo=bar. Not a prunable column
        Expression nonMatching = new ComparisonExpression(Type.EQUAL, new QualifiedNameReference(new QualifiedName("foo")), new StringLiteral("bar"));
        DataSource dataSource = splitManager.getSplits(session, tableHandle, BooleanLiteral.TRUE_LITERAL, nonMatching, Predicates.<Partition>alwaysTrue(), symbols);
        List<Split> splits = ImmutableList.copyOf(dataSource.getSplits());
        // all splits found
        assertEquals(splits.size(), 4);
    }

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        return comparison(GREATER_THAN, reference(symbol), new FunctionCall(new QualifiedName("rand"), ImmutableList.<Expression>of()));
    }


    private static QualifiedNameReference reference(Symbol symbol)
    {
        return new QualifiedNameReference(symbol.toQualifiedName());
    }

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            Expression filterExpression = node.getPredicate();


            List<Expression> projectionExpressions = new ArrayList<>();
            for (int i = 0; i < node.getOutputSymbols().size(); i++) {
                Symbol symbol = node.getOutputSymbols().get(i);
                projectionExpressions.add(new QualifiedNameReference(symbol.toQualifiedName()));
            }


            List<Symbol> outputSymbols = node.getOutputSymbols();


            return visitScanFilterAndProject(context, sourceNode, filterExpression, projectionExpressions, outputSymbols);

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                        return new DateTime(2001, 8, 22, 3, 4, 5, 321, DateTimeZone.UTC).getMillis();
                    case "bound_pattern":
                        return Slices.wrappedBuffer("%el%".getBytes(UTF_8));
                }


                return new QualifiedNameReference(symbol.toQualifiedName());
            }
        });
    }

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                if (masks.containsKey(entry.getKey())) {
                    intermediateMask.put(intermediateSymbol, masks.get(entry.getKey()));
                }


                // rewrite final aggregation in terms of intermediate function
                finalCalls.put(entry.getKey(), new FunctionCall(function.getName(), ImmutableList.<Expression>of(new QualifiedNameReference(intermediateSymbol.toQualifiedName()))));
            }


            // create partial aggregation plan
            AggregationNode partialAggregation = new AggregationNode(idAllocator.getNextId(), plan.getRoot(), groupBy, intermediateCalls, intermediateFunctions, intermediateMask, PARTIAL, sampleWeight, confidence);
            plan.setRoot(new SinkNode(idAllocator.getNextId(), partialAggregation, partialAggregation.getOutputSymbols()));

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        }


        private static Expression equalsExpression(Symbol symbol1, Symbol symbol2)
        {
            return new ComparisonExpression(ComparisonExpression.Type.EQUAL,
                    new QualifiedNameReference(symbol1.toQualifiedName()),
                    new QualifiedNameReference(symbol2.toQualifiedName()));
        }

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                    .optimize(new SymbolResolver()
                    {
                        @Override
                        public Object getValue(Symbol symbol)
                        {
                            return nullSymbols.contains(symbol) ? null : new QualifiedNameReference(symbol.toQualifiedName());
                        }
                    });
        }

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        }
        ImmutableList.Builder<Expression> conjunctBuilder = ImmutableList.builder();
        for (Map.Entry<ColumnHandle, Domain> entry : tupleDomain.getDomains().entrySet()) {
            ColumnHandle columnHandle = entry.getKey();
            checkArgument(symbolTranslationMap.containsKey(columnHandle), "Unable to convert TupleDomain to Expression b/c don't know Symbol for ColumnHandle %s", columnHandle);
            QualifiedNameReference reference = new QualifiedNameReference(symbolTranslationMap.get(columnHandle).toQualifiedName());
            conjunctBuilder.add(toPredicate(entry.getValue(), reference));
        }
        return combineConjuncts(conjunctBuilder.build());
    }

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