40 lines
1.3 KiB
Go
40 lines
1.3 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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//
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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 parser_test
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import (
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"fmt"
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"github.com/pingcap/parser"
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_ "github.com/pingcap/tidb/types/parser_driver"
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)
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// This example show how to parse a text sql into ast.
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func Example_parseSQL() {
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// 0. make sure import parser_driver implemented by TiDB(user also can implement own driver by self).
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// and add `import _ "github.com/pingcap/tidb/types/parser_driver"` in the head of file.
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// 1. Create a parser. The parser is NOT goroutine safe and should
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// not be shared among multiple goroutines. However, parser is also
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// heavy, so each goroutine should reuse its own local instance if
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// possible.
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p := parser.New()
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// 2. Parse a text SQL into AST([]ast.StmtNode).
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stmtNodes, _, err := p.Parse("select * from tbl where id = 1", "", "")
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// 3. Use AST to do cool things.
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fmt.Println(stmtNodes[0], err)
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}
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