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io.trino.metadata.MetadataListing Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.trino.metadata;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSortedSet;
import io.trino.Session;
import io.trino.security.AccessControl;
import io.trino.spi.ErrorCodeSupplier;
import io.trino.spi.TrinoException;
import io.trino.spi.connector.CatalogHandle;
import io.trino.spi.connector.ColumnMetadata;
import io.trino.spi.connector.SchemaTableName;
import io.trino.spi.connector.TableColumnsMetadata;
import io.trino.spi.predicate.Domain;
import io.trino.spi.security.GrantInfo;
import io.trino.spi.type.VarcharType;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Optional;
import java.util.Set;
import java.util.SortedSet;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Predicate;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkState;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.collect.ImmutableMap.toImmutableMap;
import static com.google.common.collect.ImmutableSet.toImmutableSet;
import static io.airlift.slice.Slices.utf8Slice;
import static io.trino.connector.system.jdbc.FilterUtil.tryGetSingleVarcharValue;
import static io.trino.spi.StandardErrorCode.GENERIC_INTERNAL_ERROR;
import static io.trino.spi.StandardErrorCode.TABLE_REDIRECTION_ERROR;
public final class MetadataListing
{
private MetadataListing() {}
public static SortedSet listCatalogNames(Session session, Metadata metadata, AccessControl accessControl, Domain catalogDomain)
{
Optional catalogName = tryGetSingleVarcharValue(catalogDomain);
Set catalogs;
if (catalogName.isPresent()) {
Optional catalogHandle = metadata.getCatalogHandle(session, catalogName.get());
if (catalogHandle.isEmpty()) {
return ImmutableSortedSet.of();
}
catalogs = ImmutableSet.of(catalogName.get());
}
else {
catalogs = metadata.listCatalogs(session).stream()
.map(CatalogInfo::getCatalogName)
.filter(stringFilter(catalogDomain))
.collect(toImmutableSet());
}
return ImmutableSortedSet.copyOf(accessControl.filterCatalogs(session.toSecurityContext(), catalogs));
}
public static List listCatalogs(Session session, Metadata metadata, AccessControl accessControl)
{
List catalogs = metadata.listCatalogs(session);
Set catalogNames = catalogs.stream()
.map(CatalogInfo::getCatalogName)
.collect(toImmutableSet());
Set allowedCatalogs = accessControl.filterCatalogs(session.toSecurityContext(), catalogNames);
return catalogs.stream()
.filter(catalogInfo -> allowedCatalogs.contains(catalogInfo.getCatalogName()))
.collect(toImmutableList());
}
public static SortedSet listSchemas(Session session, Metadata metadata, AccessControl accessControl, String catalogName)
{
return listSchemas(session, metadata, accessControl, catalogName, Optional.empty());
}
public static SortedSet listSchemas(Session session, Metadata metadata, AccessControl accessControl, String catalogName, Optional schemaName)
{
try {
return doListSchemas(session, metadata, accessControl, catalogName, schemaName);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "schemas", catalogName);
}
}
private static SortedSet doListSchemas(Session session, Metadata metadata, AccessControl accessControl, String catalogName, Optional schemaName)
{
Set schemaNames = ImmutableSet.copyOf(metadata.listSchemaNames(session, catalogName));
if (schemaName.isPresent()) {
// we don't use metadata.schemaExists(), because this would change semantics of the method (all vs visible schemas)
if (!schemaNames.contains(schemaName.get())) {
return ImmutableSortedSet.of();
}
schemaNames = ImmutableSet.of(schemaName.get());
}
return ImmutableSortedSet.copyOf(accessControl.filterSchemas(session.toSecurityContext(), catalogName, schemaNames));
}
public static Set listTables(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
try {
return doListTables(session, metadata, accessControl, prefix);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "tables", prefix.getCatalogName());
}
}
private static Set doListTables(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
Set tableNames = metadata.listTables(session, prefix).stream()
.map(QualifiedObjectName::asSchemaTableName)
.collect(toImmutableSet());
// Table listing operation only involves getting table names, but not any metadata. So redirected tables are not
// handled any differently. The target table or catalog are not involved. Thus the following filter is only called
// for the source catalog on source table names.
return accessControl.filterTables(session.toSecurityContext(), prefix.getCatalogName(), tableNames);
}
public static Set listViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
try {
return doListViews(session, metadata, accessControl, prefix);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "views", prefix.getCatalogName());
}
}
private static Set doListViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
Set tableNames = metadata.listViews(session, prefix).stream()
.map(QualifiedObjectName::asSchemaTableName)
.collect(toImmutableSet());
return accessControl.filterTables(session.toSecurityContext(), prefix.getCatalogName(), tableNames);
}
public static Map getViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
try {
return doGetViews(session, metadata, accessControl, prefix);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "views", prefix.getCatalogName());
}
}
private static Map doGetViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
Map views = metadata.getViews(session, prefix).entrySet().stream()
.collect(toImmutableMap(entry -> entry.getKey().asSchemaTableName(), Entry::getValue));
Set accessible = accessControl.filterTables(session.toSecurityContext(), prefix.getCatalogName(), views.keySet());
return views.entrySet().stream()
.filter(entry -> accessible.contains(entry.getKey()))
.collect(toImmutableMap(Entry::getKey, Entry::getValue));
}
public static Set listMaterializedViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
try {
return doListMaterializedViews(session, metadata, accessControl, prefix);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "materialized views", prefix.getCatalogName());
}
}
private static Set doListMaterializedViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
Set tableNames = metadata.listMaterializedViews(session, prefix).stream()
.map(QualifiedObjectName::asSchemaTableName)
.collect(toImmutableSet());
return accessControl.filterTables(session.toSecurityContext(), prefix.getCatalogName(), tableNames);
}
public static Map getMaterializedViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
try {
return doGetMaterializedViews(session, metadata, accessControl, prefix);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "materialized views", prefix.getCatalogName());
}
}
private static Map doGetMaterializedViews(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
Map materializedViews = metadata.getMaterializedViews(session, prefix).entrySet().stream()
.collect(toImmutableMap(entry -> entry.getKey().asSchemaTableName(), Entry::getValue));
Set accessible = accessControl.filterTables(session.toSecurityContext(), prefix.getCatalogName(), materializedViews.keySet());
return materializedViews.entrySet().stream()
.filter(entry -> accessible.contains(entry.getKey()))
.collect(toImmutableMap(Entry::getKey, Entry::getValue));
}
public static Set listTablePrivileges(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
try {
return doListTablePrivileges(session, metadata, accessControl, prefix);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "table privileges", prefix.getCatalogName());
}
}
private static Set doListTablePrivileges(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
List grants = metadata.listTablePrivileges(session, prefix);
Set allowedTables = accessControl.filterTables(
session.toSecurityContext(),
prefix.getCatalogName(),
grants.stream().map(GrantInfo::getSchemaTableName).collect(toImmutableSet()));
return grants.stream()
.filter(grantInfo -> allowedTables.contains(grantInfo.getSchemaTableName()))
.collect(toImmutableSet());
}
public static Map> listTableColumns(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
try {
return doListTableColumns(session, metadata, accessControl, prefix);
}
catch (RuntimeException exception) {
throw handleListingException(exception, "table columns", prefix.getCatalogName());
}
}
private static Map> doListTableColumns(Session session, Metadata metadata, AccessControl accessControl, QualifiedTablePrefix prefix)
{
AtomicInteger filteredCount = new AtomicInteger();
List catalogColumns = metadata.listTableColumns(
session,
prefix,
relationNames -> {
Set filtered = accessControl.filterTables(session.toSecurityContext(), prefix.getCatalogName(), relationNames);
filteredCount.addAndGet(filtered.size());
return filtered;
});
checkState(
// Inequality because relationFilter can be invoked more than once on a set of names.
filteredCount.get() >= catalogColumns.size(),
"relationFilter is mandatory, but it has not been called for some of returned relations: returned %s relations, %s passed the filter",
catalogColumns.size(),
filteredCount.get());
ImmutableMap.Builder> result = ImmutableMap.builder();
// Process tables without redirect
Map> columnNamesByTable = catalogColumns.stream()
.filter(tableColumnsMetadata -> tableColumnsMetadata.getColumns().isPresent())
.collect(toImmutableMap(
TableColumnsMetadata::getTable,
tableColumnsMetadata -> tableColumnsMetadata.getColumns().orElseThrow().stream()
.map(ColumnMetadata::getName)
.collect(toImmutableSet())));
Map> catalogAllowedColumns = accessControl.filterColumns(session.toSecurityContext(), prefix.getCatalogName(), columnNamesByTable);
catalogColumns.stream()
.filter(tableColumnsMetadata -> tableColumnsMetadata.getColumns().isPresent())
.forEach(tableColumnsMetadata -> {
Set allowedTableColumns = catalogAllowedColumns.getOrDefault(tableColumnsMetadata.getTable(), ImmutableSet.of());
result.put(
tableColumnsMetadata.getTable(),
tableColumnsMetadata.getColumns().get().stream()
.filter(column -> allowedTableColumns.contains(column.getName()))
.collect(toImmutableList()));
});
// Process redirects
catalogColumns.stream()
.filter(tableColumnsMetadata -> tableColumnsMetadata.getColumns().isEmpty())
.forEach(tableColumnsMetadata -> {
SchemaTableName table = tableColumnsMetadata.getTable();
QualifiedObjectName originalTableName = new QualifiedObjectName(prefix.getCatalogName(), table.getSchemaName(), table.getTableName());
QualifiedObjectName actualTableName;
TableHandle targetTableHandle;
try {
// For redirected tables, column listing requires special handling, because the column metadata is unavailable
// at the source table, and needs to be fetched from the target table.
RedirectionAwareTableHandle redirection = metadata.getRedirectionAwareTableHandle(session, originalTableName);
// The target table name should be non-empty. If it is empty, it means that there is an
// inconsistency in the connector's implementation of ConnectorMetadata#streamTableColumns and
// ConnectorMetadata#redirectTable.
if (redirection.redirectedTableName().isEmpty()) {
return;
}
actualTableName = redirection.redirectedTableName().get();
targetTableHandle = redirection.tableHandle().orElseThrow();
}
catch (TrinoException e) {
// Ignore redirection errors
if (e.getErrorCode().equals(TABLE_REDIRECTION_ERROR.toErrorCode())) {
return;
}
throw e;
}
List columns = metadata.getTableMetadata(session, targetTableHandle).getColumns();
Set allowedColumns = accessControl.filterColumns(
session.toSecurityContext(),
actualTableName.asCatalogSchemaTableName().getCatalogName(),
ImmutableMap.of(
// Use redirected table name for applying column filters, since the source does not know the column metadata
actualTableName.asSchemaTableName(),
columns.stream()
.map(ColumnMetadata::getName)
.collect(toImmutableSet())))
.getOrDefault(actualTableName.asSchemaTableName(), ImmutableSet.of());
result.put(
table,
columns.stream()
.filter(column -> allowedColumns.contains(column.getName()))
.collect(toImmutableList()));
});
return result.buildOrThrow();
}
private static TrinoException handleListingException(RuntimeException exception, String type, String catalogName)
{
ErrorCodeSupplier result = GENERIC_INTERNAL_ERROR;
if (exception instanceof TrinoException trinoException) {
result = trinoException::getErrorCode;
}
return new TrinoException(
result,
"Error listing %s for catalog %s: %s".formatted(type, catalogName, exception.getMessage()),
exception);
}
private static Predicate stringFilter(Domain varcharDomain)
{
checkArgument(varcharDomain.getType() instanceof VarcharType, "Invalid domain type: %s", varcharDomain.getType());
if (varcharDomain.isAll()) {
return value -> true;
}
return value -> varcharDomain.includesNullableValue(value == null ? null : utf8Slice(value));
}
}
