55 lines
2.3 KiB
Ruby
55 lines
2.3 KiB
Ruby
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# Copyright 2009 The Apache Software Foundation
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#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# TableIndexed.rb
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# Extends HBase shell with operations on IndexedTables.
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# Usage: within the HBase shell, load 'TableIndexed.rb'. Transactional
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# jar must be in the classpath.
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import org.apache.hadoop.hbase.client.tableindexed.IndexedTableAdmin
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import org.apache.hadoop.hbase.client.tableindexed.IndexSpecification
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# Creates an index using the supplied index specification.
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# [table_name] the name of the table to index.
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# [index_spec] the IndexSpecification describing the index wanted.
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def create_index(table_name, index_spec)
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@iadmin ||= IndexedTableAdmin.new(@configuration)
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@iadmin.addIndex(table_name.to_java_bytes, index_spec)
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end
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# Creates an index for a field guaranteed to have unique values. If
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# application code does not ensure uniqueness, behavior is undefined.
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# [table_name] the name of the table to index.
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# [index_name] the name of the index.
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# [column] the column name to be indexed, must respond_to to_java_bytes.
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def create_unique_index(table_name, index_name, column)
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spec = IndexSpecification.for_unique_index(index_name, column.to_java_bytes)
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create_index(table_name, spec)
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end
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# Creates an index using the standard simple index key. Supports one
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# to many mappings from indexed values to rows in the primary table.
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# [table_name] the name of the table to index.
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# [index_name] the name of the index.
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# [column] the column name to be indexed, must respond_to to_java_bytes.
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def create_simple_index(table_name, index_name, column)
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spec = new IndexSpecification(index_name, column.to_java_bytes)
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create_index(table_name, spec)
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end
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