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server: Implement column defaults for mysql.ComFieldList #40765

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merged 8 commits into from
Feb 6, 2023
Merged

server: Implement column defaults for mysql.ComFieldList #40765

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8b7be46
server: Implement column defaults for `mysql.ComFieldList`
dveeden Jan 22, 2023
4644bda
Update server/column.go
dveeden Jan 23, 2023
e06b100
Update tests for default in column list
dveeden Jan 23, 2023
803b453
Only use column defaults for ComFieldList, not for prep stmt
dveeden Jan 24, 2023
eb971d7
Merge branch 'master' into show_fields_default
dveeden Feb 6, 2023
7fc4239
Merge branch 'master' into show_fields_default
hawkingrei Feb 6, 2023
1690671
Merge branch 'master' into show_fields_default
dveeden Feb 6, 2023
ae72903
Merge branch 'master' into show_fields_default
ti-chi-bot Feb 6, 2023
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34 changes: 19 additions & 15 deletions server/column.go
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,8 @@
package server

import (
"fmt"

"github.com/pingcap/tidb/parser/charset"
"github.com/pingcap/tidb/parser/mysql"
)
Expand All @@ -23,18 +25,17 @@ const maxColumnNameSize = 256

// ColumnInfo contains information of a column
type ColumnInfo struct {
Schema string
Table string
OrgTable string
Name string
OrgName string
ColumnLength uint32
Charset uint16
Flag uint16
Decimal uint8
Type uint8
DefaultValueLength uint64
DefaultValue []byte
Schema string
Table string
OrgTable string
Name string
OrgName string
ColumnLength uint32
Charset uint16
Flag uint16
Decimal uint8
Type uint8
DefaultValue interface{}
dveeden marked this conversation as resolved.
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}

// Dump dumps ColumnInfo to bytes.
Expand Down Expand Up @@ -64,9 +65,12 @@ func (column *ColumnInfo) Dump(buffer []byte, d *resultEncoder) []byte {
buffer = append(buffer, column.Decimal)
buffer = append(buffer, 0, 0)

if column.DefaultValue != nil {
buffer = dumpUint64(buffer, uint64(len(column.DefaultValue)))
buffer = append(buffer, column.DefaultValue...)
switch column.DefaultValue {
case "CURRENT_TIMESTAMP", "CURRENT_DATE", nil:
buffer = append(buffer, 251) // NULL
default:
defaultValStr := fmt.Sprintf("%v", column.DefaultValue)
buffer = dumpLengthEncodedString(buffer, []byte(defaultValStr))
}

return buffer
Expand Down
46 changes: 22 additions & 24 deletions server/column_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -23,18 +23,17 @@ import (

func TestDumpColumn(t *testing.T) {
info := ColumnInfo{
Schema: "testSchema",
Table: "testTable",
OrgTable: "testOrgTable",
Name: "testName",
OrgName: "testOrgName",
ColumnLength: 1,
Charset: 106,
Flag: 0,
Decimal: 1,
Type: 14,
DefaultValueLength: 2,
DefaultValue: []byte{5, 2},
Schema: "testSchema",
Table: "testTable",
OrgTable: "testOrgTable",
Name: "testName",
OrgName: "testOrgName",
ColumnLength: 1,
Charset: 106,
Flag: 0,
Decimal: 1,
Type: 14,
DefaultValue: []byte{5, 2},
}
r := info.Dump(nil, nil)
exp := []byte{0x3, 0x64, 0x65, 0x66, 0xa, 0x74, 0x65, 0x73, 0x74, 0x53, 0x63, 0x68, 0x65, 0x6d, 0x61, 0x9, 0x74, 0x65, 0x73, 0x74, 0x54, 0x61, 0x62, 0x6c, 0x65, 0xc, 0x74, 0x65, 0x73, 0x74, 0x4f, 0x72, 0x67, 0x54, 0x61, 0x62, 0x6c, 0x65, 0x8, 0x74, 0x65, 0x73, 0x74, 0x4e, 0x61, 0x6d, 0x65, 0xb, 0x74, 0x65, 0x73, 0x74, 0x4f, 0x72, 0x67, 0x4e, 0x61, 0x6d, 0x65, 0xc, 0x6a, 0x0, 0x1, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x1, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x5, 0x2}
Expand All @@ -55,18 +54,17 @@ func TestColumnNameLimit(t *testing.T) {
aLongName = append(aLongName, 'a')
}
info := ColumnInfo{
Schema: "testSchema",
Table: "testTable",
OrgTable: "testOrgTable",
Name: string(aLongName),
OrgName: "testOrgName",
ColumnLength: 1,
Charset: 106,
Flag: 0,
Decimal: 1,
Type: 14,
DefaultValueLength: 2,
DefaultValue: []byte{5, 2},
Schema: "testSchema",
Table: "testTable",
OrgTable: "testOrgTable",
Name: string(aLongName),
OrgName: "testOrgName",
ColumnLength: 1,
Charset: 106,
Flag: 0,
Decimal: 1,
Type: 14,
DefaultValue: []byte{5, 2},
}
r := info.Dump(nil, nil)
exp := []byte{0x3, 0x64, 0x65, 0x66, 0xa, 0x74, 0x65, 0x73, 0x74, 0x53, 0x63, 0x68, 0x65, 0x6d, 0x61, 0x9, 0x74, 0x65, 0x73, 0x74, 0x54, 0x61, 0x62, 0x6c, 0x65, 0xc, 0x74, 0x65, 0x73, 0x74, 0x4f, 0x72, 0x67, 0x54, 0x61, 0x62, 0x6c, 0x65, 0xfc, 0x0, 0x1, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0x61, 0xb, 0x74, 0x65, 0x73, 0x74, 0x4f, 0x72, 0x67, 0x4e, 0x61, 0x6d, 0x65, 0xc, 0x6a, 0x0, 0x1, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x1, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x5, 0x2}
Expand Down
6 changes: 0 additions & 6 deletions server/conn.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2089,12 +2089,6 @@ func (cc *clientConn) handleFieldList(ctx context.Context, sql string) (err erro
cc.initResultEncoder(ctx)
defer cc.rsEncoder.clean()
for _, column := range columns {
// Current we doesn't output defaultValue but reserve defaultValue length byte to make mariadb client happy.
// https://dev.mysql.com/doc/internals/en/com-query-response.html#column-definition
// TODO: fill the right DefaultValues.
column.DefaultValueLength = 0
column.DefaultValue = []byte{}

data = data[0:4]
data = column.Dump(data, cc.rsEncoder)
if err := cc.writePacket(data); err != nil {
Expand Down
15 changes: 8 additions & 7 deletions server/driver_tidb.go
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Original file line number Diff line number Diff line change
Expand Up @@ -522,13 +522,14 @@ func unwrapResultSet(rs ResultSet) ResultSet {

func convertColumnInfo(fld *ast.ResultField) (ci *ColumnInfo) {
ci = &ColumnInfo{
Name: fld.ColumnAsName.O,
OrgName: fld.Column.Name.O,
Table: fld.TableAsName.O,
Schema: fld.DBName.O,
Flag: uint16(fld.Column.GetFlag()),
Charset: uint16(mysql.CharsetNameToID(fld.Column.GetCharset())),
Type: fld.Column.GetType(),
Name: fld.ColumnAsName.O,
OrgName: fld.Column.Name.O,
Table: fld.TableAsName.O,
Schema: fld.DBName.O,
Flag: uint16(fld.Column.GetFlag()),
Charset: uint16(mysql.CharsetNameToID(fld.Column.GetCharset())),
Type: fld.Column.GetType(),
DefaultValue: fld.Column.GetDefaultValue(),
}

if fld.Table != nil {
Expand Down
23 changes: 11 additions & 12 deletions server/driver_tidb_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -28,18 +28,17 @@ import (

func createColumnByTypeAndLen(tp byte, cl uint32) *ColumnInfo {
return &ColumnInfo{
Schema: "test",
Table: "dual",
OrgTable: "",
Name: "a",
OrgName: "a",
ColumnLength: cl,
Charset: uint16(mysql.CharsetNameToID(charset.CharsetUTF8)),
Flag: uint16(mysql.UnsignedFlag),
Decimal: uint8(0),
Type: tp,
DefaultValueLength: uint64(0),
DefaultValue: nil,
Schema: "test",
Table: "dual",
OrgTable: "",
Name: "a",
OrgName: "a",
ColumnLength: cl,
Charset: uint16(mysql.CharsetNameToID(charset.CharsetUTF8)),
Flag: uint16(mysql.UnsignedFlag),
Decimal: uint8(0),
Type: tp,
DefaultValue: nil,
}
}
func TestConvertColumnInfo(t *testing.T) {
Expand Down