github.com/matrixorigin/matrixone@v1.2.0/pkg/sql/parsers/example/eg_mysql.go (about)

     1  // Copyright 2022 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package main
    16  
    17  import (
    18  	"context"
    19  	"fmt"
    20  
    21  	"github.com/matrixorigin/matrixone/pkg/sql/parsers"
    22  	"github.com/matrixorigin/matrixone/pkg/sql/parsers/dialect"
    23  	"github.com/matrixorigin/matrixone/pkg/sql/parsers/tree"
    24  )
    25  
    26  func main() {
    27  	sql := `select u.a, (select t.a from sa.t, u) from u, (select t.a, u.a from sa.t, u where t.a = u.a) as t where (u.a, u.b, u.c) in (select t.a, u.a, t.b * u.b as tubb from t)`
    28  
    29  	ast, err := parsers.ParseOne(context.TODO(), dialect.MYSQL, sql, 1, 0)
    30  	if err != nil {
    31  		fmt.Println(err)
    32  	}
    33  	fmt.Println(tree.String(ast, dialect.MYSQL))
    34  	fmt.Printf("\n %#v \n", ast)
    35  }