Golang column.NewColDesc函數代碼示例

本文整理匯總了Golang中github.com/pingcap/tidb/column.NewColDesc函數的典型用法代碼示例。如果您正苦於以下問題：Golang NewColDesc函數的具體用法？Golang NewColDesc怎麽用？Golang NewColDesc使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。

在下文中一共展示了NewColDesc函數的8個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。

示例1: doColumns

func (isp *InfoSchemaPlan) doColumns(schemas []*model.DBInfo, iterFunc plan.RowIterFunc) error {
	for _, schema := range schemas {
		for _, table := range schema.Tables {
			for i, col := range table.Columns {
				colLen := col.Flen
				if colLen == types.UnspecifiedLength {
					colLen = mysql.GetDefaultFieldLength(col.Tp)
				}
				decimal := col.Decimal
				if decimal == types.UnspecifiedLength {
					decimal = 0
				}
				dataType := types.TypeToStr(col.Tp, col.Charset == charset.CharsetBin)
				columnType := fmt.Sprintf("%s(%d)", dataType, colLen)
				columnDesc := column.NewColDesc(&column.Col{ColumnInfo: *col})
				var columnDefault interface{}
				if columnDesc.DefaultValue != nil {
					columnDefault = fmt.Sprintf("%v", columnDesc.DefaultValue)
				}
				record := []interface{}{
					catalogVal,                                                 // TABLE_CATALOG
					schema.Name.O,                                              // TABLE_SCHEMA
					table.Name.O,                                               // TABLE_NAME
					col.Name.O,                                                 // COLUMN_NAME
					i + 1,                                                      // ORIGINAL_POSITION
					columnDefault,                                              // COLUMN_DEFAULT
					columnDesc.Null,                                            // IS_NULLABLE
					types.TypeToStr(col.Tp, col.Charset == charset.CharsetBin), // DATA_TYPE
					colLen,                            // CHARACTER_MAXIMUM_LENGTH
					colLen,                            // CHARACTOR_OCTET_LENGTH
					decimal,                           // NUMERIC_PRECISION
					0,                                 // NUMERIC_SCALE
					0,                                 // DATETIME_PRECISION
					col.Charset,                       // CHARACTER_SET_NAME
					col.Collate,                       // COLLATION_NAME
					columnType,                        // COLUMN_TYPE
					columnDesc.Key,                    // COLUMN_KEY
					columnDesc.Extra,                  // EXTRA
					"select,insert,update,references", // PRIVILEGES
					"", // COLUMN_COMMENT
				}
				if more, err := iterFunc(0, record); !more || err != nil {
					return err
				}
			}
		}
	}
	return nil
}

開發者ID:rose1988c，項目名稱:tidb，代碼行數:49，代碼來源:info.go

示例2: fetchShowColumns

func (s *ShowPlan) fetchShowColumns(ctx context.Context) error {
	is := sessionctx.GetDomain(ctx).InfoSchema()
	dbName := model.NewCIStr(s.DBName)
	if !is.SchemaExists(dbName) {
		return errors.Errorf("Can not find DB: %s", dbName)
	}
	tbName := model.NewCIStr(s.TableName)
	tb, err := is.TableByName(dbName, tbName)
	if err != nil {
		return errors.Errorf("Can not find table: %s", s.TableName)
	}
	cols := tb.Cols()

	for _, col := range cols {
		if !s.isColOK(col) {
			continue
		}

		desc := column.NewColDesc(col)

		// The FULL keyword causes the output to include the column collation and comments,
		// as well as the privileges you have for each column.
		row := &plan.Row{}
		if s.Full {
			row.Data = []interface{}{
				desc.Field,
				desc.Type,
				desc.Collation,
				desc.Null,
				desc.Key,
				desc.DefaultValue,
				desc.Extra,
				desc.Privileges,
				desc.Comment,
			}
		} else {
			row.Data = []interface{}{
				desc.Field,
				desc.Type,
				desc.Null,
				desc.Key,
				desc.DefaultValue,
				desc.Extra,
			}
		}
		s.rows = append(s.rows, row)
	}
	return nil
}

開發者ID:remotesyssupport，項目名稱:tidb，代碼行數:49，代碼來源:show.go

示例3: fetchColumns

func (isp *InfoSchemaPlan) fetchColumns(schemas []*model.DBInfo) {
	for _, schema := range schemas {
		for _, table := range schema.Tables {
			for i, col := range table.Columns {
				colLen := col.Flen
				if colLen == types.UnspecifiedLength {
					colLen = mysql.GetDefaultFieldLength(col.Tp)
				}
				decimal := col.Decimal
				if decimal == types.UnspecifiedLength {
					decimal = 0
				}
				columnType := col.FieldType.CompactStr()
				columnDesc := column.NewColDesc(&column.Col{ColumnInfo: *col})
				var columnDefault interface{}
				if columnDesc.DefaultValue != nil {
					columnDefault = fmt.Sprintf("%v", columnDesc.DefaultValue)
				}
				record := []interface{}{
					catalogVal,                           // TABLE_CATALOG
					schema.Name.O,                        // TABLE_SCHEMA
					table.Name.O,                         // TABLE_NAME
					col.Name.O,                           // COLUMN_NAME
					i + 1,                                // ORIGINAL_POSITION
					columnDefault,                        // COLUMN_DEFAULT
					columnDesc.Null,                      // IS_NULLABLE
					types.TypeToStr(col.Tp, col.Charset), // DATA_TYPE
					colLen,                            // CHARACTER_MAXIMUM_LENGTH
					colLen,                            // CHARACTOR_OCTET_LENGTH
					decimal,                           // NUMERIC_PRECISION
					0,                                 // NUMERIC_SCALE
					0,                                 // DATETIME_PRECISION
					col.Charset,                       // CHARACTER_SET_NAME
					col.Collate,                       // COLLATION_NAME
					columnType,                        // COLUMN_TYPE
					columnDesc.Key,                    // COLUMN_KEY
					columnDesc.Extra,                  // EXTRA
					"select,insert,update,references", // PRIVILEGES
					"", // COLUMN_COMMENT
				}
				isp.rows = append(isp.rows, &plan.Row{Data: record})
			}
		}
	}
}

開發者ID:netroby，項目名稱:tidb，代碼行數:45，代碼來源:info.go

示例4: fetchShowColumns

func (s *ShowPlan) fetchShowColumns(ctx context.Context) error {
	tb, err := s.getTable(ctx)
	if err != nil {
		return errors.Trace(err)
	}

	cols := tb.Cols()

	for _, col := range cols {
		if !s.isColOK(col) {
			continue
		}

		desc := column.NewColDesc(col)

		// The FULL keyword causes the output to include the column collation and comments,
		// as well as the privileges you have for each column.
		row := &plan.Row{}
		if s.Full {
			row.Data = []interface{}{
				desc.Field,
				desc.Type,
				desc.Collation,
				desc.Null,
				desc.Key,
				desc.DefaultValue,
				desc.Extra,
				desc.Privileges,
				desc.Comment,
			}
		} else {
			row.Data = []interface{}{
				desc.Field,
				desc.Type,
				desc.Null,
				desc.Key,
				desc.DefaultValue,
				desc.Extra,
			}
		}
		s.rows = append(s.rows, row)
	}
	return nil
}

開發者ID:netroby，項目名稱:tidb，代碼行數:44，代碼來源:show.go

示例5: dataForColumnsInTable

func dataForColumnsInTable(schema *model.DBInfo, table *model.TableInfo) [][]types.Datum {
	rows := [][]types.Datum{}
	for i, col := range table.Columns {
		colLen := col.Flen
		if colLen == types.UnspecifiedLength {
			colLen = mysql.GetDefaultFieldLength(col.Tp)
		}
		decimal := col.Decimal
		if decimal == types.UnspecifiedLength {
			decimal = 0
		}
		columnType := col.FieldType.CompactStr()
		columnDesc := column.NewColDesc(&column.Col{ColumnInfo: *col})
		var columnDefault interface{}
		if columnDesc.DefaultValue != nil {
			columnDefault = fmt.Sprintf("%v", columnDesc.DefaultValue)
		}
		record := types.MakeDatums(
			catalogVal,                           // TABLE_CATALOG
			schema.Name.O,                        // TABLE_SCHEMA
			table.Name.O,                         // TABLE_NAME
			col.Name.O,                           // COLUMN_NAME
			i+1,                                  // ORIGINAL_POSITION
			columnDefault,                        // COLUMN_DEFAULT
			columnDesc.Null,                      // IS_NULLABLE
			types.TypeToStr(col.Tp, col.Charset), // DATA_TYPE
			colLen,                            // CHARACTER_MAXIMUM_LENGTH
			colLen,                            // CHARACTOR_OCTET_LENGTH
			decimal,                           // NUMERIC_PRECISION
			0,                                 // NUMERIC_SCALE
			0,                                 // DATETIME_PRECISION
			col.Charset,                       // CHARACTER_SET_NAME
			col.Collate,                       // COLLATION_NAME
			columnType,                        // COLUMN_TYPE
			columnDesc.Key,                    // COLUMN_KEY
			columnDesc.Extra,                  // EXTRA
			"select,insert,update,references", // PRIVILEGES
			"", // COLUMN_COMMENT
		)
		rows = append(rows, record)
	}
	return rows
}

開發者ID:astaxie，項目名稱:tidb，代碼行數:43，代碼來源:tables.go

示例6: fetchShowColumns

func (e *ShowExec) fetchShowColumns() error {
	tb, err := e.getTable()
	if err != nil {
		return errors.Trace(err)
	}
	cols := tb.Cols()
	for _, col := range cols {
		if e.Column != nil && e.Column.Name.L != col.Name.L {
			continue
		}

		desc := column.NewColDesc(col)

		// The FULL keyword causes the output to include the column collation and comments,
		// as well as the privileges you have for each column.
		row := &Row{}
		if e.Full {
			row.Data = types.MakeDatums(
				desc.Field,
				desc.Type,
				desc.Collation,
				desc.Null,
				desc.Key,
				desc.DefaultValue,
				desc.Extra,
				desc.Privileges,
				desc.Comment,
			)
		} else {
			row.Data = types.MakeDatums(
				desc.Field,
				desc.Type,
				desc.Null,
				desc.Key,
				desc.DefaultValue,
				desc.Extra,
			)
		}
		e.rows = append(e.rows, row)
	}
	return nil
}

開發者ID:astaxie，項目名稱:tidb，代碼行數:42，代碼來源:show.go

示例7: fetchAll

func (s *ShowPlan) fetchAll(ctx context.Context) error {
	// TODO split this function
	switch s.Target {
	case stmt.ShowEngines:
		row := &plan.Row{
			Data: []interface{}{"InnoDB", "DEFAULT", "Supports transactions, row-level locking, and foreign keys", "YES", "YES", "YES"},
		}
		s.rows = append(s.rows, row)
	case stmt.ShowDatabases:
		dbs := sessionctx.GetDomain(ctx).InfoSchema().AllSchemaNames()

		// TODO: let information_schema be the first database
		sort.Strings(dbs)

		for _, d := range dbs {
			s.rows = append(s.rows, &plan.Row{Data: []interface{}{d}})
		}
	case stmt.ShowTables:
		is := sessionctx.GetDomain(ctx).InfoSchema()
		dbName := model.NewCIStr(s.DBName)
		if !is.SchemaExists(dbName) {
			return errors.Errorf("Can not find DB: %s", dbName)
		}

		// sort for tables
		var tableNames []string
		for _, v := range is.SchemaTables(dbName) {
			tableNames = append(tableNames, v.TableName().L)
		}

		sort.Strings(tableNames)

		for _, v := range tableNames {
			s.rows = append(s.rows, &plan.Row{Data: []interface{}{v}})
		}
	case stmt.ShowColumns:
		is := sessionctx.GetDomain(ctx).InfoSchema()
		dbName := model.NewCIStr(s.DBName)
		if !is.SchemaExists(dbName) {
			return errors.Errorf("Can not find DB: %s", dbName)
		}
		tbName := model.NewCIStr(s.TableName)
		tb, err := is.TableByName(dbName, tbName)
		if err != nil {
			return errors.Errorf("Can not find table: %s", s.TableName)
		}
		cols := tb.Cols()

		for _, col := range cols {
			if !s.isColOK(col) {
				continue
			}

			desc := column.NewColDesc(col)

			// The FULL keyword causes the output to include the column collation and comments,
			// as well as the privileges you have for each column.
			row := &plan.Row{}
			if s.Full {
				row.Data = []interface{}{
					desc.Field,
					desc.Type,
					desc.Collation,
					desc.Null,
					desc.Key,
					desc.DefaultValue,
					desc.Extra,
					desc.Privileges,
					desc.Comment,
				}
			} else {
				row.Data = []interface{}{
					desc.Field,
					desc.Type,
					desc.Null,
					desc.Key,
					desc.DefaultValue,
					desc.Extra,
				}
			}
			s.rows = append(s.rows, row)
		}
	case stmt.ShowWarnings:
	// empty result
	case stmt.ShowCharset:
		// See: http://dev.mysql.com/doc/refman/5.7/en/show-character-set.html
		descs := charset.GetAllCharsets()
		for _, desc := range descs {
			row := &plan.Row{
				Data: []interface{}{desc.Name, desc.Desc, desc.DefaultCollation, desc.Maxlen},
			}
			s.rows = append(s.rows, row)
		}
	case stmt.ShowVariables:
		sessionVars := variable.GetSessionVars(ctx)
		for _, v := range variable.SysVars {
			if s.Pattern != nil {
				s.Pattern.Expr = expression.Value{Val: v.Name}
				r, err := s.Pattern.Eval(ctx, nil)
				if err != nil {
//.........這裏部分代碼省略.........

開發者ID:kingland，項目名稱:tidb，代碼行數:101，代碼來源:show.go

示例8: Do

// Do implements plan.Plan Do interface.
func (s *ShowPlan) Do(ctx context.Context, f plan.RowIterFunc) (err error) {
	switch s.Target {
	case stmt.ShowEngines:
		f(0, []interface{}{"InnoDB", "DEFAULT", "Supports transactions, row-level locking, and foreign keys", "YES", "YES", "YES"})
	case stmt.ShowDatabases:
		dbs := sessionctx.GetDomain(ctx).InfoSchema().AllSchemaNames()

		// TODO: let information_schema be the first database
		sort.Strings(dbs)

		for _, d := range dbs {
			f(0, []interface{}{d})
		}
	case stmt.ShowTables:
		is := sessionctx.GetDomain(ctx).InfoSchema()
		dbName := model.NewCIStr(s.DBName)
		if !is.SchemaExists(dbName) {
			return errors.Errorf("Can not find DB: %s", dbName)
		}

		// sort for tables
		var tableNames []string
		for _, v := range is.SchemaTables(dbName) {
			tableNames = append(tableNames, v.TableName().L)
		}

		sort.Strings(tableNames)

		for _, v := range tableNames {
			f(0, []interface{}{v})
		}
	case stmt.ShowColumns:
		is := sessionctx.GetDomain(ctx).InfoSchema()
		dbName := model.NewCIStr(s.DBName)
		if !is.SchemaExists(dbName) {
			return errors.Errorf("Can not find DB: %s", dbName)
		}
		tbName := model.NewCIStr(s.TableName)
		tb, err := is.TableByName(dbName, tbName)
		if err != nil {
			return errors.Errorf("Can not find table: %s", s.TableName)
		}
		cols := tb.Cols()

		for _, col := range cols {
			if !s.isColOK(col) {
				continue
			}

			desc := column.NewColDesc(col)

			// The FULL keyword causes the output to include the column collation and comments,
			// as well as the privileges you have for each column.
			if s.Full {
				f(0, []interface{}{
					desc.Field,
					desc.Type,
					desc.Collation,
					desc.Null,
					desc.Key,
					desc.DefaultValue,
					desc.Extra,
					desc.Privileges,
					desc.Comment,
				})
			} else {
				f(0, []interface{}{
					desc.Field,
					desc.Type,
					desc.Null,
					desc.Key,
					desc.DefaultValue,
					desc.Extra,
				})
			}
		}
	case stmt.ShowWarnings:
		// empty result
	case stmt.ShowCharset:
		// See: http://dev.mysql.com/doc/refman/5.7/en/show-character-set.html
		descs := charset.GetAllCharsets()
		for _, desc := range descs {
			row := []interface{}{desc.Name, desc.Desc, desc.DefaultCollation, desc.Maxlen}
			f(0, row)
		}
	case stmt.ShowVariables:
		sessionVars := variable.GetSessionVars(ctx)
		for _, v := range variable.SysVars {
			if s.Pattern != nil {
				p, ok := s.Pattern.(*expressions.PatternLike)
				if !ok {
					return errors.Errorf("Like should be a PatternLike expression")
				}
				p.Expr = expressions.Value{Val: v.Name}
				r, err := p.Eval(ctx, nil)
				if err != nil {
					return errors.Trace(err)
				}
				match, ok := r.(bool)
//.........這裏部分代碼省略.........

開發者ID:superwood，項目名稱:tidb，代碼行數:101，代碼來源:show.go

注：本文中的github.com/pingcap/tidb/column.NewColDesc函數示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台，相關代碼片段篩選自各路編程大神貢獻的開源項目，源碼版權歸原作者所有，傳播和使用請參考對應項目的License；未經允許，請勿轉載。