Golang ast.ResultSetNode类代码示例

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本文整理汇总了Golang中github.com/pingcap/tidb/ast.ResultSetNode类的典型用法代码示例。如果您正苦于以下问题：Golang ResultSetNode类的具体用法？Golang ResultSetNode怎么用？Golang ResultSetNode使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了ResultSetNode类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: resolveColumnInTableSources

func (nr *nameResolver) resolveColumnInTableSources(cn *ast.ColumnNameExpr, tableSources []*ast.TableSource) (done bool) {
	var matchedResultField *ast.ResultField
	tableNameL := cn.Name.Table.L
	columnNameL := cn.Name.Name.L
	if tableNameL != "" {
		var matchedTable ast.ResultSetNode
		for _, ts := range tableSources {
			if tableNameL == ts.AsName.L {
				// different table name.
				matchedTable = ts
				break
			} else if ts.AsName.L != "" {
				// Table as name shadows table real name.
				continue
			}
			if tn, ok := ts.Source.(*ast.TableName); ok {
				if cn.Name.Schema.L != "" && cn.Name.Schema.L != tn.Schema.L {
					continue
				}
				if tableNameL == tn.Name.L {
					matchedTable = ts
				}
			}
		}
		if matchedTable != nil {
			resultFields := matchedTable.GetResultFields()
			for _, rf := range resultFields {
				if rf.ColumnAsName.L == columnNameL || rf.Column.Name.L == columnNameL {
					// resolve column.
					matchedResultField = rf
					break
				}
			}
		}
	} else {
		for _, ts := range tableSources {
			rfs := ts.GetResultFields()
			for _, rf := range rfs {
				matchAsName := rf.ColumnAsName.L != "" && rf.ColumnAsName.L == columnNameL
				matchColumnName := rf.ColumnAsName.L == "" && rf.Column.Name.L == columnNameL
				if matchAsName || matchColumnName {
					if matchedResultField != nil {
						nr.Err = errors.Errorf("column %s is ambiguous.", cn.Name.Name.O)
						return true
					}
					matchedResultField = rf
				}
			}
		}
	}
	if matchedResultField != nil {
		// Bind column.
		cn.Refer = matchedResultField
		matchedResultField.Referenced = true
		return true
	}
	return false
}

开发者ID:XuHuaiyu，项目名称:tidb，代码行数:58，代码来源:resolver.go

示例2: bindColumnInTableSources

func (sb *InfoBinder) bindColumnInTableSources(cn *ast.ColumnName, tableSources []*ast.TableSource) (done bool) {
	var matchedResultField *ast.ResultField
	if cn.Table.L != "" {
		var matchedTable ast.ResultSetNode
		for _, ts := range tableSources {
			if cn.Table.L == ts.AsName.L {
				// different table name.
				matchedTable = ts
				break
			}
			if tn, ok := ts.Source.(*ast.TableName); ok {
				if cn.Table.L == tn.Name.L {
					matchedTable = ts
				}
			}
		}
		if matchedTable != nil {
			resultFields := matchedTable.GetResultFields()
			for _, rf := range resultFields {
				if rf.ColumnAsName.L == cn.Name.L || rf.Column.Name.L == cn.Name.L {
					// bind column.
					matchedResultField = rf
					break
				}
			}
		}
	} else {
		for _, ts := range tableSources {
			rfs := ts.GetResultFields()
			for _, rf := range rfs {
				matchAsName := rf.ColumnAsName.L != "" && rf.ColumnAsName.L == cn.Name.L
				matchColumnName := rf.ColumnAsName.L == "" && rf.Column.Name.L == cn.Name.L
				if matchAsName || matchColumnName {
					if matchedResultField != nil {
						sb.Err = errors.Errorf("column %s is ambiguous.", cn.Name.O)
						return true
					}
					matchedResultField = rf
				}
			}
		}
	}
	if matchedResultField != nil {
		// bind column.
		cn.ColumnInfo = matchedResultField.Column
		cn.TableInfo = matchedResultField.Table
		return true
	}
	return false
}

开发者ID:yzl11，项目名称:vessel，代码行数:50，代码来源:infobinder.go

注：本文中的github.com/pingcap/tidb/ast.ResultSetNode类示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。