Examples with FullConnectorSession io.trino.FullConnectorSession used on opensource projects

Example 6 with FullConnectorSession

use of io.trino.FullConnectorSession in project trino by trinodb.

the class TableCommentSystemTable method cursor.

@Override
public RecordCursor cursor(ConnectorTransactionHandle transactionHandle, ConnectorSession connectorSession, TupleDomain<Integer> constraint) {
    Optional<String> catalogFilter = tryGetSingleVarcharValue(constraint, 0);
    Optional<String> schemaFilter = tryGetSingleVarcharValue(constraint, 1);
    Optional<String> tableFilter = tryGetSingleVarcharValue(constraint, 2);
    Session session = ((FullConnectorSession) connectorSession).getSession();
    Builder table = InMemoryRecordSet.builder(COMMENT_TABLE);
    for (String catalog : listCatalogs(session, metadata, accessControl, catalogFilter).keySet()) {
        QualifiedTablePrefix prefix = tablePrefix(catalog, schemaFilter, tableFilter);
        Set<SchemaTableName> names = ImmutableSet.of();
        Map<SchemaTableName, ViewInfo> views = ImmutableMap.of();
        Map<SchemaTableName, ViewInfo> materializedViews = ImmutableMap.of();
        try {
            materializedViews = getMaterializedViews(session, metadata, accessControl, prefix);
            views = getViews(session, metadata, accessControl, prefix);
            // Some connectors like blackhole, accumulo and raptor don't return views in listTables
            // Materialized views are consistently returned in listTables by the relevant connectors
            names = union(listTables(session, metadata, accessControl, prefix), views.keySet());
        } catch (TrinoException e) {
            // listTables throws an exception if cannot connect the database
            LOG.warn(e, "Failed to get tables for catalog: %s", catalog);
        }
        for (SchemaTableName name : names) {
            Optional<String> comment = Optional.empty();
            try {
                comment = getComment(session, prefix, name, views, materializedViews);
            } catch (RuntimeException e) {
                // getTableHandle may throw an exception (e.g. Cassandra connector doesn't allow case insensitive column names)
                LOG.warn(e, "Failed to get metadata for table: %s", name);
            }
            table.addRow(prefix.getCatalogName(), name.getSchemaName(), name.getTableName(), comment.orElse(null));
        }
    }
    return table.build().cursor();
}

Example 7 with FullConnectorSession

use of io.trino.FullConnectorSession in project trino by trinodb.

the class CatalogJdbcTable method cursor.

@Override
public RecordCursor cursor(ConnectorTransactionHandle transactionHandle, ConnectorSession connectorSession, TupleDomain<Integer> constraint) {
    Session session = ((FullConnectorSession) connectorSession).getSession();
    Builder table = InMemoryRecordSet.builder(METADATA);
    for (String name : listCatalogs(session, metadata, accessControl).keySet()) {
        table.addRow(name);
    }
    return table.build().cursor();
}

Example 8 with FullConnectorSession

use of io.trino.FullConnectorSession in project trino by trinodb.

the class CatalogSystemTable method cursor.

@Override
public RecordCursor cursor(ConnectorTransactionHandle transactionHandle, ConnectorSession connectorSession, TupleDomain<Integer> constraint) {
    Session session = ((FullConnectorSession) connectorSession).getSession();
    Builder table = InMemoryRecordSet.builder(CATALOG_TABLE);
    for (Map.Entry<String, Catalog> entry : getCatalogs(session, metadata, accessControl).entrySet()) {
        table.addRow(entry.getKey(), entry.getValue().getConnectorCatalogName().toString(), entry.getValue().getConnectorName());
    }
    return table.build().cursor();
}

Example 9 with FullConnectorSession

use of io.trino.FullConnectorSession in project trino by trinodb.

the class InformationSchemaMetadata method calculatePrefixesWithSchemaName.

private Set<QualifiedTablePrefix> calculatePrefixesWithSchemaName(ConnectorSession connectorSession, TupleDomain<ColumnHandle> constraint, Optional<Predicate<Map<ColumnHandle, NullableValue>>> predicate) {
    Optional<Set<String>> schemas = filterString(constraint, SCHEMA_COLUMN_HANDLE);
    if (schemas.isPresent()) {
        return schemas.get().stream().filter(this::isLowerCase).filter(schema -> predicate.isEmpty() || predicate.get().test(schemaAsFixedValues(schema))).map(schema -> new QualifiedTablePrefix(catalogName, schema)).collect(toImmutableSet());
    }
    if (predicate.isEmpty()) {
        return ImmutableSet.of(new QualifiedTablePrefix(catalogName));
    }
    Session session = ((FullConnectorSession) connectorSession).getSession();
    return listSchemaNames(session).filter(prefix -> predicate.get().test(schemaAsFixedValues(prefix.getSchemaName().get()))).collect(toImmutableSet());
}

Example 10 with FullConnectorSession

use of io.trino.FullConnectorSession in project trino by trinodb.

the class InformationSchemaMetadata method calculatePrefixesWithTableName.

private Set<QualifiedTablePrefix> calculatePrefixesWithTableName(InformationSchemaTable informationSchemaTable, ConnectorSession connectorSession, Set<QualifiedTablePrefix> prefixes, TupleDomain<ColumnHandle> constraint, Optional<Predicate<Map<ColumnHandle, NullableValue>>> predicate) {
    Session session = ((FullConnectorSession) connectorSession).getSession();
    Optional<Set<String>> tables = filterString(constraint, TABLE_NAME_COLUMN_HANDLE);
    if (tables.isPresent()) {
        return prefixes.stream().peek(prefix -> verify(prefix.asQualifiedObjectName().isEmpty())).flatMap(prefix -> prefix.getSchemaName().map(schemaName -> Stream.of(prefix)).orElseGet(() -> listSchemaNames(session))).flatMap(prefix -> tables.get().stream().filter(this::isLowerCase).map(table -> new QualifiedObjectName(catalogName, prefix.getSchemaName().get(), table))).filter(objectName -> {
            if (!isColumnsEnumeratingTable(informationSchemaTable) || metadata.isMaterializedView(session, objectName) || metadata.isView(session, objectName)) {
                return true;
            }
            // This is a columns enumerating table and the object is not a view
            try {
                // filtering in case the source table does not exist or there is a problem with redirection.
                return metadata.getRedirectionAwareTableHandle(session, objectName).getTableHandle().isPresent();
            } catch (TrinoException e) {
                if (e.getErrorCode().equals(TABLE_REDIRECTION_ERROR.toErrorCode())) {
                    // Ignore redirection errors for listing, treat as if the table does not exist
                    return false;
                }
                throw e;
            }
        }).filter(objectName -> predicate.isEmpty() || predicate.get().test(asFixedValues(objectName))).map(QualifiedObjectName::asQualifiedTablePrefix).collect(toImmutableSet());
    }
    if (predicate.isEmpty() || !isColumnsEnumeratingTable(informationSchemaTable)) {
        return prefixes;
    }
    return prefixes.stream().flatMap(prefix -> Stream.concat(metadata.listTables(session, prefix).stream(), metadata.listViews(session, prefix).stream())).filter(objectName -> predicate.get().test(asFixedValues(objectName))).map(QualifiedObjectName::asQualifiedTablePrefix).collect(toImmutableSet());
}