本文整理汇总了Golang中github.com/pingcap/tidb/ast.ShowStmt.DBName方法的典型用法代码示例。如果您正苦于以下问题：Golang ShowStmt.DBName方法的具体用法？Golang ShowStmt.DBName怎么用？Golang ShowStmt.DBName使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/pingcap/tidb/ast.ShowStmt的用法示例。
在下文中一共展示了ShowStmt.DBName方法的1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，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: fillShowFields
func (nr *nameResolver) fillShowFields(s *ast.ShowStmt) {
if s.DBName == "" {
if s.Table != nil && s.Table.Schema.L != "" {
s.DBName = s.Table.Schema.O
} else {
s.DBName = nr.DefaultSchema.O
}
} else if s.Table != nil && s.Table.Schema.L == "" {
s.Table.Schema = model.NewCIStr(s.DBName)
}
var fields []*ast.ResultField
var (
names []string
ftypes []byte
)
switch s.Tp {
case ast.ShowEngines:
names = []string{"Engine", "Support", "Comment", "Transactions", "XA", "Savepoints"}
case ast.ShowDatabases:
names = []string{"Database"}
case ast.ShowTables:
names = []string{fmt.Sprintf("Tables_in_%s", s.DBName)}
if s.Full {
names = append(names, "Table_type")
}
case ast.ShowTableStatus:
names = []string{"Name", "Engine", "Version", "Row_format", "Rows", "Avg_row_length",
"Data_length", "Max_data_length", "Index_length", "Data_free", "Auto_increment",
"Create_time", "Update_time", "Check_time", "Collation", "Checksum",
"Create_options", "Comment"}
ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeLonglong, mysql.TypeVarchar, mysql.TypeLonglong, mysql.TypeLonglong,
mysql.TypeLonglong, mysql.TypeLonglong, mysql.TypeLonglong, mysql.TypeLonglong, mysql.TypeLonglong,
mysql.TypeDatetime, mysql.TypeDatetime, mysql.TypeDatetime, mysql.TypeVarchar, mysql.TypeVarchar,
mysql.TypeVarchar, mysql.TypeVarchar}
case ast.ShowColumns:
names = table.ColDescFieldNames(s.Full)
case ast.ShowWarnings:
names = []string{"Level", "Code", "Message"}
ftypes = []byte{mysql.TypeVarchar, mysql.TypeLong, mysql.TypeVarchar}
case ast.ShowCharset:
names = []string{"Charset", "Description", "Default collation", "Maxlen"}
ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeLonglong}
case ast.ShowVariables:
names = []string{"Variable_name", "Value"}
case ast.ShowStatus:
names = []string{"Variable_name", "Value"}
case ast.ShowCollation:
names = []string{"Collation", "Charset", "Id", "Default", "Compiled", "Sortlen"}
ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeLonglong,
mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeLonglong}
case ast.ShowCreateTable:
names = []string{"Table", "Create Table"}
case ast.ShowGrants:
names = []string{fmt.Sprintf("Grants for %s", s.User)}
case ast.ShowTriggers:
names = []string{"Trigger", "Event", "Table", "Statement", "Timing", "Created",
"sql_mode", "Definer", "character_set_client", "collation_connection", "Database Collation"}
ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar,
mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar}
case ast.ShowProcedureStatus:
names = []string{}
ftypes = []byte{}
case ast.ShowIndex:
names = []string{"Table", "Non_unique", "Key_name", "Seq_in_index",
"Column_name", "Collation", "Cardinality", "Sub_part", "Packed",
"Null", "Index_type", "Comment", "Index_comment"}
ftypes = []byte{mysql.TypeVarchar, mysql.TypeLonglong, mysql.TypeVarchar, mysql.TypeLonglong,
mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeLonglong, mysql.TypeLonglong,
mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar}
}
for i, name := range names {
f := &ast.ResultField{
ColumnAsName: model.NewCIStr(name),
Column: &model.ColumnInfo{}, // Empty column info.
Table: &model.TableInfo{}, // Empty table info.
}
if ftypes == nil || ftypes[i] == 0 {
// use varchar as the default return column type
f.Column.Tp = mysql.TypeVarchar
} else {
f.Column.Tp = ftypes[i]
}
f.Column.Charset, f.Column.Collate = types.DefaultCharsetForType(f.Column.Tp)
f.Expr = &ast.ValueExpr{}
f.Expr.SetType(&f.Column.FieldType)
fields = append(fields, f)
}
if s.Pattern != nil && s.Pattern.Expr == nil {
rf := fields[0]
s.Pattern.Expr = &ast.ColumnNameExpr{
Name: &ast.ColumnName{Name: rf.ColumnAsName},
}
ast.SetFlag(s.Pattern)
}
s.SetResultFields(fields)
nr.currentContext().fieldList = fields
}