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

Example 6 with Session

use of io.trino.Session 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 Session

use of io.trino.Session 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 Session

use of io.trino.Session 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 Session

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

the class MetadataManager method schemaExists.

@Override
public boolean schemaExists(Session session, CatalogSchemaName schema) {
    Optional<CatalogMetadata> catalog = getOptionalCatalogMetadata(session, schema.getCatalogName());
    if (catalog.isEmpty()) {
        return false;
    }
    CatalogMetadata catalogMetadata = catalog.get();
    ConnectorSession connectorSession = session.toConnectorSession(catalogMetadata.getCatalogName());
    return catalogMetadata.listConnectorIds().stream().map(catalogName -> catalogMetadata.getMetadataFor(session, catalogName)).anyMatch(metadata -> metadata.schemaExists(connectorSession, schema.getSchemaName()));
}

Example 10 with Session

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

the class MetadataManager method listRoles.

@Override
public Set<String> listRoles(Session session, Optional<String> catalog) {
    if (catalog.isPresent()) {
        Optional<CatalogMetadata> catalogMetadata = getOptionalCatalogMetadata(session, catalog.get());
        if (catalogMetadata.isEmpty()) {
            return ImmutableSet.of();
        }
        // instead of returning nothing, so information schema role tables will work properly
        if (catalogMetadata.get().getSecurityManagement() == SecurityManagement.CONNECTOR) {
            CatalogName catalogName = catalogMetadata.get().getCatalogName();
            ConnectorSession connectorSession = session.toConnectorSession(catalogName);
            ConnectorMetadata metadata = catalogMetadata.get().getMetadataFor(session, catalogName);
            return metadata.listRoles(connectorSession).stream().map(role -> role.toLowerCase(ENGLISH)).collect(toImmutableSet());
        }
    }
    return systemSecurityMetadata.listRoles(session);
}