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6cca7242de
* Add "offset" parameter to the Scan query. It works by doing the query as normal and then throwing away the first "offset" number of rows on the broker. * Fix constructor call. * Fix up JSONs. * Fix call to ScanQuery. * Doc update. * Fix javadocs. * Spotbugs, LGTM suppressions. * Javadocs. * Fix suppression. * Stabilize Scan query result order, add tests. * Update LGTM comment. * Fixup. * Test different batch sizes too. * Nicer tests. * Fix comment.
28 lines
1.2 KiB
Markdown
28 lines
1.2 KiB
Markdown
---
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id: select-query
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title: "Select queries"
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sidebar_label: "Select"
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---
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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,
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~ software distributed under the License is distributed on an
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~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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~ KIND, either express or implied. See the License for the
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~ specific language governing permissions and limitations
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~ under the License.
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-->
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Older versions of Apache Druid included a Select query type. Since Druid 0.17.0, it has been removed and replaced by the [Scan query](../querying/scan-query.md), which offers improved memory usage and performance. This solves issues that users had with Select queries causing Druid to run out of memory or slow down.
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