Examples with StructuredDataSource io.confluent.ksql.metastore.StructuredDataSource used on opensource projects

Example 1 with StructuredDataSource

use of io.confluent.ksql.metastore.StructuredDataSource in project ksql by confluentinc.

the class KsqlResource method describe.

private SourceDescription describe(String name, boolean extended) throws KsqlException {
    StructuredDataSource dataSource = ksqlEngine.getMetaStore().getSource(name);
    if (dataSource == null) {
        throw new KsqlException(String.format("Could not find STREAM/TABLE '%s' in the Metastore", name));
    }
    List<PersistentQueryMetadata> queries = ksqlEngine.getPersistentQueries().values().stream().filter(meta -> ((KsqlStructuredDataOutputNode) meta.getOutputNode()).getKafkaTopicName().equals(dataSource.getKsqlTopic().getTopicName())).collect(Collectors.toList());
    return new SourceDescription(dataSource, extended, dataSource.getKsqlTopic().getKsqlTopicSerDe().getSerDe().name(), "", "", getReadQueryIds(queries), getWriteQueryIds(queries), ksqlEngine.getTopicClient());
}

Example 2 with StructuredDataSource

use of io.confluent.ksql.metastore.StructuredDataSource in project ksql by confluentinc.

the class AstBuilder method getResultDatasource.

private StructuredDataSource getResultDatasource(Select select, Table into) {
    SchemaBuilder dataSource = SchemaBuilder.struct().name(into.toString());
    for (SelectItem selectItem : select.getSelectItems()) {
        if (selectItem instanceof SingleColumn) {
            SingleColumn singleColumn = (SingleColumn) selectItem;
            String fieldName = singleColumn.getAlias().get();
            dataSource = dataSource.field(fieldName, Schema.BOOLEAN_SCHEMA);
        }
    }
    KsqlTopic ksqlTopic = new KsqlTopic(into.getName().toString(), into.getName().toString(), null);
    StructuredDataSource resultStream = new KsqlStream("AstBuilder-Into", into.getName().toString(), dataSource.schema(), dataSource.fields().get(0), null, ksqlTopic);
    return resultStream;
}

Example 3 with StructuredDataSource

use of io.confluent.ksql.metastore.StructuredDataSource in project ksql by confluentinc.

the class AstBuilder method getSelectStartItems.

private List<SelectItem> getSelectStartItems(final SelectItem selectItem, final Relation from) {
    List<SelectItem> selectItems = new ArrayList<>();
    AllColumns allColumns = (AllColumns) selectItem;
    if (from instanceof Join) {
        Join join = (Join) from;
        AliasedRelation left = (AliasedRelation) join.getLeft();
        StructuredDataSource leftDataSource = dataSourceExtractor.getMetaStore().getSource(left.getRelation().toString());
        if (leftDataSource == null) {
            throw new InvalidColumnReferenceException(left.getRelation().toString() + " does not exist.");
        }
        AliasedRelation right = (AliasedRelation) join.getRight();
        StructuredDataSource rightDataSource = dataSourceExtractor.getMetaStore().getSource(right.getRelation().toString());
        if (rightDataSource == null) {
            throw new InvalidColumnReferenceException(right.getRelation().toString() + " does not exist.");
        }
        for (Field field : leftDataSource.getSchema().fields()) {
            QualifiedNameReference qualifiedNameReference = new QualifiedNameReference(allColumns.getLocation().get(), QualifiedName.of(left.getAlias() + "." + field.name()));
            SingleColumn newSelectItem = new SingleColumn(qualifiedNameReference, left.getAlias() + "_" + field.name());
            selectItems.add(newSelectItem);
        }
        for (Field field : rightDataSource.getSchema().fields()) {
            QualifiedNameReference qualifiedNameReference = new QualifiedNameReference(allColumns.getLocation().get(), QualifiedName.of(right.getAlias() + "." + field.name()));
            SingleColumn newSelectItem = new SingleColumn(qualifiedNameReference, right.getAlias() + "_" + field.name());
            selectItems.add(newSelectItem);
        }
    } else {
        AliasedRelation fromRel = (AliasedRelation) from;
        StructuredDataSource fromDataSource = dataSourceExtractor.getMetaStore().getSource(((Table) fromRel.getRelation()).getName().getSuffix());
        if (fromDataSource == null) {
            throw new InvalidColumnReferenceException(((Table) fromRel.getRelation()).getName().getSuffix() + " does not exist.");
        }
        for (Field field : fromDataSource.getSchema().fields()) {
            QualifiedNameReference qualifiedNameReference = new QualifiedNameReference(allColumns.getLocation().get(), QualifiedName.of(fromDataSource.getName() + "." + field.name()));
            SingleColumn newSelectItem = new SingleColumn(qualifiedNameReference, field.name());
            selectItems.add(newSelectItem);
        }
    }
    return selectItems;
}

Example 4 with StructuredDataSource

use of io.confluent.ksql.metastore.StructuredDataSource in project ksql by confluentinc.

the class DataSourceExtractor method visitAliasedRelation.

@Override
public Node visitAliasedRelation(final SqlBaseParser.AliasedRelationContext context) {
    Table table = (Table) visit(context.relationPrimary());
    String alias = null;
    if (context.children.size() == 1) {
        alias = table.getName().getSuffix().toUpperCase();
    } else if (context.children.size() == 2) {
        alias = context.children.get(1).getText().toUpperCase();
    }
    if (!isJoin) {
        this.fromAlias = alias;
        StructuredDataSource fromDataSource = metaStore.getSource(table.getName().getSuffix());
        if (fromDataSource == null) {
            throw new KsqlException(table.getName().getSuffix() + " does not exist.");
        }
        return null;
    }
    // TODO: Figure out if the call to toUpperCase() here is really necessary
    return new AliasedRelation(getLocation(context), table, alias.toUpperCase(), getColumnAliases(context.columnAliases()));
}

Example 5 with StructuredDataSource

use of io.confluent.ksql.metastore.StructuredDataSource in project ksql by confluentinc.

the class Analyzer method visitJoin.

@Override
protected Node visitJoin(final Join node, final AnalysisContext context) {
    AliasedRelation left = (AliasedRelation) process(node.getLeft(), context);
    AliasedRelation right = (AliasedRelation) process(node.getRight(), context);
    String leftSideName = ((Table) left.getRelation()).getName().getSuffix();
    StructuredDataSource leftDataSource = metaStore.getSource(leftSideName);
    if (leftDataSource == null) {
        throw new KsqlException(format("Resource %s does not exist.", leftSideName));
    }
    leftDataSource = timestampColumn(left, leftDataSource);
    String rightSideName = ((Table) right.getRelation()).getName().getSuffix();
    StructuredDataSource rightDataSource = metaStore.getSource(rightSideName);
    if (rightDataSource == null) {
        throw new KsqlException(format("Resource %s does not exist.", rightSideName));
    }
    rightDataSource = timestampColumn(right, rightDataSource);
    String leftAlias = left.getAlias();
    String rightAlias = right.getAlias();
    JoinNode.Type joinType = getJoinType(node);
    if (!node.getCriteria().isPresent()) {
        throw new KsqlException(String.format("%s Join criteria is not set.", node.getLocation().isPresent() ? node.getLocation().get().toString() : ""));
    }
    JoinOn joinOn = (JoinOn) (node.getCriteria().get());
    ComparisonExpression comparisonExpression = (ComparisonExpression) joinOn.getExpression();
    Pair<String, String> leftSide = fetchKeyFieldName(comparisonExpression, leftAlias, leftDataSource.getSchema());
    Pair<String, String> rightSide = fetchKeyFieldName(comparisonExpression, rightAlias, rightDataSource.getSchema());
    String leftKeyFieldName = leftSide.getRight();
    String rightKeyFieldName = rightSide.getRight();
    if (comparisonExpression.getType() != ComparisonExpression.Type.EQUAL) {
        throw new KsqlException("Only equality join criteria is supported.");
    }
    StructuredDataSourceNode leftSourceKafkaTopicNode = new StructuredDataSourceNode(new PlanNodeId("KafkaTopic_Left"), leftDataSource, leftDataSource.getSchema());
    StructuredDataSourceNode rightSourceKafkaTopicNode = new StructuredDataSourceNode(new PlanNodeId("KafkaTopic_Right"), rightDataSource, rightDataSource.getSchema());
    JoinNode joinNode = new JoinNode(new PlanNodeId("Join"), joinType, leftSourceKafkaTopicNode, rightSourceKafkaTopicNode, leftKeyFieldName, rightKeyFieldName, leftAlias, rightAlias);
    analysis.setJoin(joinNode);
    return null;
}