Examples with TableFunctionImplementation io.crate.metadata.tablefunctions.TableFunctionImplementation used on opensource projects

Example 1 with TableFunctionImplementation

use of io.crate.metadata.tablefunctions.TableFunctionImplementation in project crate by crate.

the class UnnestFunctionTest method execute.

private Bucket execute(String expr) {
    Symbol functionSymbol = sqlExpressions.asSymbol(expr);
    functionSymbol = sqlExpressions.normalize(functionSymbol);
    Function function = (Function) functionSymbol;
    TableFunctionImplementation tableFunction = (TableFunctionImplementation) functions.getSafe(function.info().ident());
    return tableFunction.execute(function.arguments().stream().map(a -> (Input) a).collect(Collectors.toList()));
}

Example 2 with TableFunctionImplementation

use of io.crate.metadata.tablefunctions.TableFunctionImplementation in project crate by crate.

the class TableFunctionCollectSource method getCollector.

@Override
public CrateCollector getCollector(CollectPhase collectPhase, BatchConsumer consumer, JobCollectContext jobCollectContext) {
    TableFunctionCollectPhase phase = (TableFunctionCollectPhase) collectPhase;
    WhereClause whereClause = phase.whereClause();
    if (whereClause.noMatch()) {
        return RowsCollector.empty(consumer);
    }
    TableFunctionImplementation functionImplementation = phase.relation().functionImplementation();
    TableInfo tableInfo = functionImplementation.createTableInfo(clusterService);
    //noinspection unchecked  Only literals can be passed to table functions. Anything else is invalid SQL
    List<Input<?>> inputs = (List<Input<?>>) (List) phase.relation().function().arguments();
    List<Reference> columns = new ArrayList<>(tableInfo.columns());
    List<Input<?>> topLevelInputs = new ArrayList<>(phase.toCollect().size());
    InputFactory.Context<InputCollectExpression> ctx = inputFactory.ctxForRefs(i -> new InputCollectExpression(columns.indexOf(i)));
    for (Symbol symbol : phase.toCollect()) {
        topLevelInputs.add(ctx.add(symbol));
    }
    Iterable<Row> rows = Iterables.transform(functionImplementation.execute(inputs), new ValueAndInputRow<>(topLevelInputs, ctx.expressions()));
    if (whereClause.hasQuery()) {
        Input<Boolean> condition = (Input<Boolean>) ctx.add(whereClause.query());
        rows = Iterables.filter(rows, InputCondition.asPredicate(condition));
    }
    OrderBy orderBy = phase.orderBy();
    if (orderBy != null) {
        rows = RowsTransformer.sortRows(Iterables.transform(rows, Row::materialize), phase);
    }
    return RowsCollector.forRows(rows, phase.toCollect().size(), consumer);
}

Example 3 with TableFunctionImplementation

use of io.crate.metadata.tablefunctions.TableFunctionImplementation in project crate by crate.

the class RelationAnalyzer method visitTableFunction.

@Override
public AnalyzedRelation visitTableFunction(TableFunction node, StatementAnalysisContext statementContext) {
    RelationAnalysisContext context = statementContext.currentRelationContext();
    ExpressionAnalyzer expressionAnalyzer = new ExpressionAnalyzer(functions, statementContext.sessionContext(), statementContext.convertParamFunction(), new FieldProvider() {

        @Override
        public Symbol resolveField(QualifiedName qualifiedName, Operation operation) {
            throw new UnsupportedOperationException("Can only resolve literals");
        }

        @Override
        public Symbol resolveField(QualifiedName qualifiedName, @Nullable List path, Operation operation) {
            throw new UnsupportedOperationException("Can only resolve literals");
        }
    }, null);
    Function function = (Function) expressionAnalyzer.convert(node.functionCall(), context.expressionAnalysisContext());
    FunctionImplementation functionImplementation = functions.getSafe(function.info().ident());
    if (functionImplementation.info().type() != FunctionInfo.Type.TABLE) {
        throw new UnsupportedFeatureException("Non table function " + function.info().ident().name() + " is not supported in from clause");
    }
    TableFunctionImplementation tableFunction = (TableFunctionImplementation) functionImplementation;
    TableInfo tableInfo = tableFunction.createTableInfo(clusterService);
    Operation.blockedRaiseException(tableInfo, statementContext.currentOperation());
    TableRelation tableRelation = new TableFunctionRelation(tableInfo, tableFunction, function);
    context.addSourceRelation(node.name(), tableRelation);
    return tableRelation;
}