| /********************************************************************** |
| // @@@ START COPYRIGHT @@@ |
| // |
| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| // |
| // @@@ END COPYRIGHT @@@ |
| **********************************************************************/ |
| #ifndef HSREAD_H |
| #define HSREAD_H |
| /* -*-C++-*- |
| ***************************************************************************** |
| * |
| * File: hs_read.h |
| * Description: Function to read histograms tables. |
| * Created: 04/27/96 |
| * Language: C++ |
| * |
| * |
| * |
| * |
| ***************************************************************************** |
| */ |
| |
| // ----------------------------------------------------------------------- |
| |
| #include "Stats.h" |
| |
| /******************************************************************************/ |
| /* FetchHistograms() */ |
| /* FUNCTION Provides the histograms of the specified table and columns, */ |
| /* if they exist. If histograms do not exist, the function will */ |
| /* estimate the rowcount and UEC and return these (that is, there */ |
| /* will be only 1 interval in this case. */ |
| /* */ |
| /* RETCODE Success: (0) */ |
| /* */ |
| /******************************************************************************/ |
| Lng32 FetchHistograms( const QualifiedName & qualifiedName |
| , const ExtendedQualName::SpecialTableType type |
| , const NAColumnArray & colArray |
| , StatsList & colStatsList |
| , NABoolean isSQLMPTable |
| , NAMemory * heap |
| , Int64 & statsTime |
| , NABoolean & allFakeStats |
| , const NABoolean preFetch=FALSE |
| , Int64 createStatsSize=0 |
| ); |
| |
| |
| /******************************************************************************/ |
| /* FetchCount() */ |
| /* FUNCTION Provides the rowcount of a table after a predicate has been */ |
| /* applied. */ |
| /* */ |
| /* RETCODE Success: (0) */ |
| /* */ |
| /******************************************************************************/ |
| Lng32 FetchCount( const QualifiedName &qualifiedName, |
| const ExtendedQualName::SpecialTableType type, |
| NAString &predicate, |
| Int64 &count, |
| float &sampleFraction, |
| Int64 &tableSize); |
| |
| #endif /* HSREAD_H */ |
| |
| |
| |
| |
| |
| |
