github.com/dolthub/go-mysql-server@v0.18.0/sql/analyzer/warnings.go (about)

     1  // Copyright 2020-2021 Dolthub, Inc.
     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 analyzer
    16  
    17  import (
    18  	"github.com/dolthub/go-mysql-server/sql"
    19  	"github.com/dolthub/go-mysql-server/sql/plan"
    20  	"github.com/dolthub/go-mysql-server/sql/transform"
    21  )
    22  
    23  func clearWarnings(ctx *sql.Context, a *Analyzer, node sql.Node, scope *plan.Scope, sel RuleSelector) (sql.Node, transform.TreeIdentity, error) {
    24  	children := node.Children()
    25  	if len(children) == 0 {
    26  		return node, transform.SameTree, nil
    27  	}
    28  
    29  	switch ch := children[0].(type) {
    30  	case plan.ShowWarnings:
    31  		return node, transform.SameTree, nil
    32  	case *plan.Offset:
    33  		clearWarnings(ctx, a, ch, scope, sel)
    34  		return node, transform.SameTree, nil
    35  	case *plan.Limit:
    36  		clearWarnings(ctx, a, ch, scope, sel)
    37  		return node, transform.SameTree, nil
    38  	}
    39  
    40  	ctx.ClearWarnings()
    41  	return node, transform.SameTree, nil
    42  }