Examples with SqlValidatorNamespace org.apache.calcite.sql.validate.SqlValidatorNamespace used on opensource projects

Example 1 with SqlValidatorNamespace

use of org.apache.calcite.sql.validate.SqlValidatorNamespace in project calcite by apache.

the class SqlMultisetQueryConstructor method deriveType.

public RelDataType deriveType(SqlValidator validator, SqlValidatorScope scope, SqlCall call) {
    SqlSelect subSelect = call.operand(0);
    subSelect.validateExpr(validator, scope);
    SqlValidatorNamespace ns = validator.getNamespace(subSelect);
    assert null != ns.getRowType();
    return SqlTypeUtil.createMultisetType(validator.getTypeFactory(), ns.getRowType(), false);
}

Example 2 with SqlValidatorNamespace

use of org.apache.calcite.sql.validate.SqlValidatorNamespace in project calcite by apache.

the class SqlToRelConverter method convertMatchRecognize.

protected void convertMatchRecognize(Blackboard bb, SqlCall call) {
    final SqlMatchRecognize matchRecognize = (SqlMatchRecognize) call;
    final SqlValidatorNamespace ns = validator.getNamespace(matchRecognize);
    final SqlValidatorScope scope = validator.getMatchRecognizeScope(matchRecognize);
    final Blackboard matchBb = createBlackboard(scope, null, false);
    final RelDataType rowType = ns.getRowType();
    // convert inner query, could be a table name or a derived table
    SqlNode expr = matchRecognize.getTableRef();
    convertFrom(matchBb, expr);
    final RelNode input = matchBb.root;
    // PARTITION BY
    final SqlNodeList partitionList = matchRecognize.getPartitionList();
    final List<RexNode> partitionKeys = new ArrayList<>();
    for (SqlNode partition : partitionList) {
        RexNode e = matchBb.convertExpression(partition);
        partitionKeys.add(e);
    }
    // ORDER BY
    final SqlNodeList orderList = matchRecognize.getOrderList();
    final List<RelFieldCollation> orderKeys = new ArrayList<>();
    for (SqlNode order : orderList) {
        final RelFieldCollation.Direction direction;
        switch(order.getKind()) {
            case DESCENDING:
                direction = RelFieldCollation.Direction.DESCENDING;
                order = ((SqlCall) order).operand(0);
                break;
            case NULLS_FIRST:
            case NULLS_LAST:
                throw new AssertionError();
            default:
                direction = RelFieldCollation.Direction.ASCENDING;
                break;
        }
        final RelFieldCollation.NullDirection nullDirection = validator.getDefaultNullCollation().last(desc(direction)) ? RelFieldCollation.NullDirection.LAST : RelFieldCollation.NullDirection.FIRST;
        RexNode e = matchBb.convertExpression(order);
        orderKeys.add(new RelFieldCollation(((RexInputRef) e).getIndex(), direction, nullDirection));
    }
    final RelCollation orders = cluster.traitSet().canonize(RelCollations.of(orderKeys));
    // convert pattern
    final Set<String> patternVarsSet = new HashSet<>();
    SqlNode pattern = matchRecognize.getPattern();
    final SqlBasicVisitor<RexNode> patternVarVisitor = new SqlBasicVisitor<RexNode>() {

        @Override
        public RexNode visit(SqlCall call) {
            List<SqlNode> operands = call.getOperandList();
            List<RexNode> newOperands = Lists.newArrayList();
            for (SqlNode node : operands) {
                newOperands.add(node.accept(this));
            }
            return rexBuilder.makeCall(validator.getUnknownType(), call.getOperator(), newOperands);
        }

        @Override
        public RexNode visit(SqlIdentifier id) {
            assert id.isSimple();
            patternVarsSet.add(id.getSimple());
            return rexBuilder.makeLiteral(id.getSimple());
        }

        @Override
        public RexNode visit(SqlLiteral literal) {
            if (literal instanceof SqlNumericLiteral) {
                return rexBuilder.makeExactLiteral(BigDecimal.valueOf(literal.intValue(true)));
            } else {
                return rexBuilder.makeLiteral(literal.booleanValue());
            }
        }
    };
    final RexNode patternNode = pattern.accept(patternVarVisitor);
    SqlLiteral interval = matchRecognize.getInterval();
    RexNode intervalNode = null;
    if (interval != null) {
        intervalNode = matchBb.convertLiteral(interval);
    }
    // convert subset
    final SqlNodeList subsets = matchRecognize.getSubsetList();
    final Map<String, TreeSet<String>> subsetMap = Maps.newHashMap();
    for (SqlNode node : subsets) {
        List<SqlNode> operands = ((SqlCall) node).getOperandList();
        SqlIdentifier left = (SqlIdentifier) operands.get(0);
        patternVarsSet.add(left.getSimple());
        SqlNodeList rights = (SqlNodeList) operands.get(1);
        final TreeSet<String> list = new TreeSet<String>();
        for (SqlNode right : rights) {
            assert right instanceof SqlIdentifier;
            list.add(((SqlIdentifier) right).getSimple());
        }
        subsetMap.put(left.getSimple(), list);
    }
    SqlNode afterMatch = matchRecognize.getAfter();
    if (afterMatch == null) {
        afterMatch = SqlMatchRecognize.AfterOption.SKIP_TO_NEXT_ROW.symbol(SqlParserPos.ZERO);
    }
    final RexNode after;
    if (afterMatch instanceof SqlCall) {
        List<SqlNode> operands = ((SqlCall) afterMatch).getOperandList();
        SqlOperator operator = ((SqlCall) afterMatch).getOperator();
        assert operands.size() == 1;
        SqlIdentifier id = (SqlIdentifier) operands.get(0);
        assert patternVarsSet.contains(id.getSimple()) : id.getSimple() + " not defined in pattern";
        RexNode rex = rexBuilder.makeLiteral(id.getSimple());
        after = rexBuilder.makeCall(validator.getUnknownType(), operator, ImmutableList.of(rex));
    } else {
        after = matchBb.convertExpression(afterMatch);
    }
    matchBb.setPatternVarRef(true);
    // convert measures
    final ImmutableMap.Builder<String, RexNode> measureNodes = ImmutableMap.builder();
    for (SqlNode measure : matchRecognize.getMeasureList()) {
        List<SqlNode> operands = ((SqlCall) measure).getOperandList();
        String alias = ((SqlIdentifier) operands.get(1)).getSimple();
        RexNode rex = matchBb.convertExpression(operands.get(0));
        measureNodes.put(alias, rex);
    }
    // convert definitions
    final ImmutableMap.Builder<String, RexNode> definitionNodes = ImmutableMap.builder();
    for (SqlNode def : matchRecognize.getPatternDefList()) {
        List<SqlNode> operands = ((SqlCall) def).getOperandList();
        String alias = ((SqlIdentifier) operands.get(1)).getSimple();
        RexNode rex = matchBb.convertExpression(operands.get(0));
        definitionNodes.put(alias, rex);
    }
    final SqlLiteral rowsPerMatch = matchRecognize.getRowsPerMatch();
    final boolean allRows = rowsPerMatch != null && rowsPerMatch.getValue() == SqlMatchRecognize.RowsPerMatchOption.ALL_ROWS;
    matchBb.setPatternVarRef(false);
    final RelFactories.MatchFactory factory = RelFactories.DEFAULT_MATCH_FACTORY;
    final RelNode rel = factory.createMatch(input, patternNode, rowType, matchRecognize.getStrictStart().booleanValue(), matchRecognize.getStrictEnd().booleanValue(), definitionNodes.build(), measureNodes.build(), after, subsetMap, allRows, partitionKeys, orders, intervalNode);
    bb.setRoot(rel, false);
}

Example 3 with SqlValidatorNamespace

use of org.apache.calcite.sql.validate.SqlValidatorNamespace in project calcite by apache.

the class SqlToRelConverter method getTargetTable.

protected RelOptTable getTargetTable(SqlNode call) {
    final SqlValidatorNamespace targetNs = validator.getNamespace(call);
    if (targetNs.isWrapperFor(SqlValidatorImpl.DmlNamespace.class)) {
        final SqlValidatorImpl.DmlNamespace dmlNamespace = targetNs.unwrap(SqlValidatorImpl.DmlNamespace.class);
        return SqlValidatorUtil.getRelOptTable(dmlNamespace, catalogReader, null, null);
    }
    final SqlValidatorNamespace resolvedNamespace = targetNs.resolve();
    return SqlValidatorUtil.getRelOptTable(resolvedNamespace, catalogReader, null, null);
}

Example 4 with SqlValidatorNamespace

use of org.apache.calcite.sql.validate.SqlValidatorNamespace in project calcite by apache.

the class SqlToRelConverter method convertIdentifier.

private void convertIdentifier(Blackboard bb, SqlIdentifier id, SqlNodeList extendedColumns) {
    final SqlValidatorNamespace fromNamespace = validator.getNamespace(id).resolve();
    if (fromNamespace.getNode() != null) {
        convertFrom(bb, fromNamespace.getNode());
        return;
    }
    final String datasetName = datasetStack.isEmpty() ? null : datasetStack.peek();
    final boolean[] usedDataset = { false };
    RelOptTable table = SqlValidatorUtil.getRelOptTable(fromNamespace, catalogReader, datasetName, usedDataset);
    if (extendedColumns != null && extendedColumns.size() > 0) {
        assert table != null;
        final SqlValidatorTable validatorTable = table.unwrap(SqlValidatorTable.class);
        final List<RelDataTypeField> extendedFields = SqlValidatorUtil.getExtendedColumns(validator.getTypeFactory(), validatorTable, extendedColumns);
        table = table.extend(extendedFields);
    }
    final RelNode tableRel;
    if (config.isConvertTableAccess()) {
        tableRel = toRel(table);
    } else {
        tableRel = LogicalTableScan.create(cluster, table);
    }
    bb.setRoot(tableRel, true);
    if (usedDataset[0]) {
        bb.setDataset(datasetName);
    }
}

Example 5 with SqlValidatorNamespace

use of org.apache.calcite.sql.validate.SqlValidatorNamespace in project druid by druid-io.

the class SqlResourceCollectorShuttle method visit.

@Override
public SqlNode visit(SqlIdentifier id) {
    // raw tables and views and such will have a IdentifierNamespace
    // since we are scoped to identifiers here, we should only pick up these
    SqlValidatorNamespace namespace = validator.getNamespace(id);
    if (namespace != null && namespace.isWrapperFor(IdentifierNamespace.class)) {
        SqlValidatorTable validatorTable = namespace.getTable();
        // this should not probably be null if the namespace was not null,
        if (validatorTable != null) {
            List<String> qualifiedNameParts = validatorTable.getQualifiedName();
            // 'schema'.'identifier'
            if (qualifiedNameParts.size() == 2) {
                final String schema = qualifiedNameParts.get(0);
                final String resourceName = qualifiedNameParts.get(1);
                final String resourceType = plannerContext.getSchemaResourceType(schema, resourceName);
                if (resourceType != null) {
                    resourceActions.add(new ResourceAction(new Resource(resourceName, resourceType), Action.READ));
                }
            } else if (qualifiedNameParts.size() > 2) {
                // Don't expect to see more than 2 names (catalog?).
                throw new ISE("Cannot analyze table idetifier %s", qualifiedNameParts);
            }
        }
    }
    return super.visit(id);
}