64 lines
2.3 KiB
Go
64 lines
2.3 KiB
Go
// Copyright 2018 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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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// // 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package core
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import (
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. "github.com/pingcap/check"
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"github.com/pingcap/parser"
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"github.com/pingcap/parser/ast"
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"github.com/pingcap/parser/model"
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"github.com/pingcap/tidb/ddl"
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"github.com/pingcap/tidb/expression"
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"github.com/pingcap/tidb/util/mock"
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)
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var _ = Suite(&testPartitionPruningSuite{})
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type testPartitionPruningSuite struct {
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partitionProcessor
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}
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func (s *testPartitionPruningSuite) TestCanBePrune(c *C) {
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p := parser.New()
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stmt, err := p.ParseOneStmt("create table t (d datetime not null)", "", "")
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c.Assert(err, IsNil)
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tblInfo, err := ddl.BuildTableInfoFromAST(stmt.(*ast.CreateTableStmt))
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c.Assert(err, IsNil)
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// For the following case:
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// CREATE TABLE t1 ( recdate DATETIME NOT NULL )
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// PARTITION BY RANGE( TO_DAYS(recdate) ) (
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// PARTITION p0 VALUES LESS THAN ( TO_DAYS('2007-03-08') ),
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// PARTITION p1 VALUES LESS THAN ( TO_DAYS('2007-04-01') )
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// );
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// SELECT * FROM t1 WHERE recdate < '2007-03-08 00:00:00';
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// SELECT * FROM t1 WHERE recdate > '2018-03-08 00:00:00';
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ctx := mock.NewContext()
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columns := expression.ColumnInfos2ColumnsWithDBName(ctx, model.NewCIStr("t"), tblInfo.Name, tblInfo.Columns)
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schema := expression.NewSchema(columns...)
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partitionExpr, err := expression.ParseSimpleExprsWithSchema(ctx, "to_days(d) < to_days('2007-03-08') and to_days(d) >= to_days('2007-03-07')", schema)
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c.Assert(err, IsNil)
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queryExpr, err := expression.ParseSimpleExprsWithSchema(ctx, "d < '2000-03-08 00:00:00'", schema)
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c.Assert(err, IsNil)
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succ, err := s.canBePruned(ctx, nil, partitionExpr[0], queryExpr)
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c.Assert(err, IsNil)
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c.Assert(succ, IsTrue)
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queryExpr, err = expression.ParseSimpleExprsWithSchema(ctx, "d > '2018-03-08 00:00:00'", schema)
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c.Assert(err, IsNil)
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succ, err = s.canBePruned(ctx, nil, partitionExpr[0], queryExpr)
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c.Assert(err, IsNil)
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c.Assert(succ, IsTrue)
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}
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