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The PGAdapter server implements the PostgreSQL wire-protocol, but sends all received statements
to a Cloud Spanner database instead of a PostgreSQL database. The Cloud Spanner database must
have been created to use the PostgreSQL dialect. See https://cloud.google.com/spanner/docs/quickstart-console#postgresql
for more information on how to create PostgreSQL dialect databases on Cloud Spanner.
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// Copyright 2020 Google LLC
//
// 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 com.google.cloud.spanner.pgadapter.commands;
import com.google.api.core.InternalApi;
import java.util.regex.Pattern;
/**
* Fallthrough Command which should match most meta-commands. We are expected to run this last in
* the matching logic to present the user with better error statements.
*/
@InternalApi
public class InvalidMetaCommand extends Command {
private static final Pattern INPUT_REGEX = Pattern.compile(".*pg_catalog.*");
InvalidMetaCommand(String sql) {
super(sql);
}
@Override
public Pattern getPattern() {
return INPUT_REGEX;
}
@Override
public String translate() {
// Just try to use the sql statement that was either generated by psql or manually entered by
// the user.
return sql;
}
}
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