serialize on update expressions (#7115)

go/cmd/dolt/commands/diff.go

@@ -886,7 +886,7 @@ func schemaFromCreateTableStmt(createTableStmt string) (schema.Schema, error) {
 		}
 	}
 
-	cols := []schema.Column{}
+	var cols []schema.Column
 	for _, col := range create.TableSpec.Columns {
 		internalTyp, err := types.ColumnTypeToType(&col.Type)
 		typeInfo, err := typeinfo.FromSqlType(internalTyp)
@@ -898,17 +898,30 @@ func schemaFromCreateTableStmt(createTableStmt string) (schema.Schema, error) {
 		if col.Type.Default != nil {
 			col.Type.Default.Format(defBuf)
 		}
+
+		genBuf := ast.NewTrackedBuffer(nil)
+		if col.Type.GeneratedExpr != nil {
+			col.Type.GeneratedExpr.Format(genBuf)
+		}
+
+		onUpBuf := ast.NewTrackedBuffer(nil)
+		if col.Type.OnUpdate != nil {
+			col.Type.OnUpdate.Format(onUpBuf)
+		}
+
 		var comment string
 		if col.Type.Comment != nil {
 			comment = col.Type.Comment.String()
 		}
+
 		sCol := schema.Column{
 			Name:          col.Name.String(),
 			Kind:          typeInfo.NomsKind(),
 			IsPartOfPK:    primaryCols[col.Name.Lowered()],
 			TypeInfo:      typeInfo,
 			Default:       defBuf.String(),
 			Generated:     "",    // TODO
+			OnUpdate:      "",    // TODO
 			Virtual:       false, // TODO
 			AutoIncrement: col.Type.Autoincrement == true,
 			Comment:       comment,

go/go.mod

@@ -57,7 +57,7 @@ require (
 	github.com/cespare/xxhash v1.1.0
 	github.com/creasty/defaults v1.6.0
 	github.com/dolthub/flatbuffers/v23 v23.3.3-dh.2
-	github.com/dolthub/go-mysql-server v0.17.1-0.20231214194603-39acc5e6f988
+	github.com/dolthub/go-mysql-server v0.17.1-0.20231215225524-76f133444ea4
 	github.com/dolthub/swiss v0.1.0
 	github.com/goccy/go-json v0.10.2
 	github.com/google/go-github/v57 v57.0.0

go/go.sum

@@ -181,8 +181,8 @@ github.com/dolthub/fslock v0.0.3 h1:iLMpUIvJKMKm92+N1fmHVdxJP5NdyDK5bK7z7Ba2s2U=
 github.com/dolthub/fslock v0.0.3/go.mod h1:QWql+P17oAAMLnL4HGB5tiovtDuAjdDTPbuqx7bYfa0=
 github.com/dolthub/go-icu-regex v0.0.0-20230524105445-af7e7991c97e h1:kPsT4a47cw1+y/N5SSCkma7FhAPw7KeGmD6c9PBZW9Y=
 github.com/dolthub/go-icu-regex v0.0.0-20230524105445-af7e7991c97e/go.mod h1:KPUcpx070QOfJK1gNe0zx4pA5sicIK1GMikIGLKC168=
-github.com/dolthub/go-mysql-server v0.17.1-0.20231214194603-39acc5e6f988 h1:oYhHtAZFJujmu6NeHfjliwNaVrbaq5pYbl9Pu84Bq2I=
-github.com/dolthub/go-mysql-server v0.17.1-0.20231214194603-39acc5e6f988/go.mod h1:zJCyPiYe9VZ9xIQTv7S1OFKwyoVQoeGxZXNtkFxTcOI=
+github.com/dolthub/go-mysql-server v0.17.1-0.20231215225524-76f133444ea4 h1:s1YRhf3iwEO89iO7pfq+eIV6kQHl9h7XS6MlYKhPptw=
+github.com/dolthub/go-mysql-server v0.17.1-0.20231215225524-76f133444ea4/go.mod h1:zJCyPiYe9VZ9xIQTv7S1OFKwyoVQoeGxZXNtkFxTcOI=
 github.com/dolthub/ishell v0.0.0-20221214210346-d7db0b066488 h1:0HHu0GWJH0N6a6keStrHhUAK5/o9LVfkh44pvsV4514=
 github.com/dolthub/ishell v0.0.0-20221214210346-d7db0b066488/go.mod h1:ehexgi1mPxRTk0Mok/pADALuHbvATulTh6gzr7NzZto=
 github.com/dolthub/jsonpath v0.0.2-0.20230525180605-8dc13778fd72 h1:NfWmngMi1CYUWU4Ix8wM+USEhjc+mhPlT9JUR/anvbQ=

go/libraries/doltcore/merge/merge_prolly_rows.go

@@ -1181,7 +1181,7 @@ func resolveDefaults(ctx *sql.Context, tableName string, mergedSchema schema.Sch
 			return false, nil
 		}
 
-		if col.Default != "" || col.Generated != "" {
+		if col.Default != "" || col.Generated != "" || col.OnUpdate != "" {
 			expr, err := index.ResolveDefaultExpression(ctx, tableName, mergedSchema, col)
 			if err != nil {
 				return true, err
@@ -1443,7 +1443,7 @@ func remapTupleWithColumnDefaults(
 			// If the column is a new column, then look up any default or generated value in a second pass, after the
 			// non-default and non-generated fields have been established. Virtual columns have been excluded, so any
 			// generated column is stored.
-			if col.Default != "" || col.Generated != "" {
+			if col.Default != "" || col.Generated != "" || col.OnUpdate != "" {
 				secondPass = append(secondPass, to)
 			}
 		} else {

go/libraries/doltcore/mvdata/engine_table_writer.go

@@ -270,7 +270,7 @@ func (s *SqlEngineTableWriter) createTable() error {
 	// upstream to make the dolt schema
 	sqlCols := make([]string, len(s.tableSchema.Schema))
 	for i, c := range s.tableSchema.Schema {
-		sqlCols[i] = sql.GenerateCreateTableColumnDefinition(c, c.Default.String(), sql.Collation_Default)
+		sqlCols[i] = sql.GenerateCreateTableColumnDefinition(c, c.Default.String(), c.OnUpdate.String(), sql.Collation_Default)
 	}
 	var pks string
 	var sep string

go/libraries/doltcore/schema/column.go

@@ -74,6 +74,9 @@ type Column struct {
 	// Generated is the generated value of this column. This is the string representation of a sql.Expression.
 	Generated string
 
+	// OnUpdate is the on update value of this column. This is the string representation of a sql.Expression.
+	OnUpdate string
+
 	// Virtual is true if this is a virtual column.
 	Virtual bool
 

go/libraries/doltcore/schema/encoding/serialization.go

@@ -57,12 +57,23 @@ func serializeSchemaAsFlatbuffer(sch schema.Schema) ([]byte, error) {
 	indexes := serializeSecondaryIndexes(b, sch, sch.Indexes().AllIndexes())
 	checks := serializeChecks(b, sch.Checks().AllChecks())
 
+	var hasFeaturesAfterTryAccessors bool
+	for _, col := range sch.GetAllCols().GetColumns() {
+		if col.OnUpdate != "" {
+			hasFeaturesAfterTryAccessors = true
+			break
+		}
+	}
+
 	serial.TableSchemaStart(b)
 	serial.TableSchemaAddClusteredIndex(b, rows)
 	serial.TableSchemaAddColumns(b, columns)
 	serial.TableSchemaAddSecondaryIndexes(b, indexes)
 	serial.TableSchemaAddChecks(b, checks)
 	serial.TableSchemaAddCollation(b, serial.Collation(sch.GetCollation()))
+	if hasFeaturesAfterTryAccessors {
+		serial.TableSchemaAddHasFeaturesAfterTryAccessors(b, hasFeaturesAfterTryAccessors)
+	}
 	root := serial.TableSchemaEnd(b)
 	bs := serial.FinishMessage(b, root, []byte(serial.TableSchemaFileID))
 	return bs, nil
@@ -215,15 +226,21 @@ func serializeSchemaColumns(b *fb.Builder, sch schema.Schema) fb.UOffsetT {
 	// serialize columns in |cols|
 	for i := len(cols) - 1; i >= 0; i-- {
 		col := cols[i]
-		defVal := ""
+		var defVal, onUpdateVal string
 		if col.Default != "" {
 			defVal = col.Default
 		} else {
 			defVal = col.Generated
 		}
 
+		if col.OnUpdate != "" {
+			onUpdateVal = col.OnUpdate
+		}
+
 		co := b.CreateString(col.Comment)
 		do := b.CreateString(defVal)
+		ou := b.CreateString(onUpdateVal)
+
 		typeString := sqlTypeString(col.TypeInfo)
 		to := b.CreateString(typeString)
 		no := b.CreateString(col.Name)
@@ -242,6 +259,9 @@ func serializeSchemaColumns(b *fb.Builder, sch schema.Schema) fb.UOffsetT {
 		serial.ColumnAddNullable(b, col.IsNullable())
 		serial.ColumnAddGenerated(b, col.Generated != "")
 		serial.ColumnAddVirtual(b, col.Virtual)
+		if onUpdateVal != "" {
+			serial.ColumnAddOnUpdateValue(b, ou)
+		}
 		serial.ColumnAddHidden(b, false)
 		offs[i] = serial.ColumnEnd(b)
 	}
@@ -319,8 +339,7 @@ func deserializeColumns(ctx context.Context, s *serial.TableSchema) ([]schema.Co
 			return nil, err
 		}
 
-		defVal := ""
-		generatedVal := ""
+		var defVal, generatedVal, onUpdateVal string
 		if c.DefaultValue() != nil {
 			if c.Generated() {
 				generatedVal = string(c.DefaultValue())
@@ -329,6 +348,10 @@ func deserializeColumns(ctx context.Context, s *serial.TableSchema) ([]schema.Co
 			}
 		}
 
+		if c.OnUpdateValue() != nil {
+			onUpdateVal = string(c.OnUpdateValue())
+		}
+
 		cols[i] = schema.Column{
 			Name:          string(c.Name()),
 			Tag:           c.Tag(),
@@ -337,6 +360,7 @@ func deserializeColumns(ctx context.Context, s *serial.TableSchema) ([]schema.Co
 			TypeInfo:      sqlType,
 			Default:       defVal,
 			Generated:     generatedVal,
+			OnUpdate:      onUpdateVal,
 			Virtual:       c.Virtual(),
 			AutoIncrement: c.AutoIncrement(),
 			Comment:       string(c.Comment()),

go/libraries/doltcore/sqle/enginetest/dolt_engine_test.go

@@ -1234,6 +1234,12 @@ func TestColumnDefaults(t *testing.T) {
 	enginetest.TestColumnDefaults(t, h)
 }
 
+func TestOnUpdateExprScripts(t *testing.T) {
+	h := newDoltHarness(t)
+	defer h.Close()
+	enginetest.TestOnUpdateExprScripts(t, h)
+}
+
 func TestAlterTable(t *testing.T) {
 	// This is a newly added test in GMS that dolt doesn't support yet
 	h := newDoltHarness(t).WithSkippedQueries([]string{"ALTER TABLE t42 ADD COLUMN s varchar(20), drop check check1"})

go/libraries/doltcore/sqle/sqlfmt/schema_fmt.go

@@ -32,13 +32,16 @@ func GenerateCreateTableColumnDefinition(col schema.Column, tableCollation sql.C
 
 // GenerateCreateTableIndentedColumnDefinition returns column definition for CREATE TABLE statement with no indentation
 func GenerateCreateTableIndentedColumnDefinition(col schema.Column, tableCollation sql.CollationID) string {
-	var defaultVal, genVal *sql.ColumnDefaultValue
+	var defaultVal, genVal, onUpdateVal *sql.ColumnDefaultValue
 	if col.Default != "" {
 		defaultVal = sql.NewUnresolvedColumnDefaultValue(col.Default)
 	}
 	if col.Generated != "" {
 		genVal = sql.NewUnresolvedColumnDefaultValue(col.Generated)
 	}
+	if col.OnUpdate != "" {
+		onUpdateVal = sql.NewUnresolvedColumnDefaultValue(col.OnUpdate)
+	}
 
 	return sql.GenerateCreateTableColumnDefinition(
 		&sql.Column{
@@ -50,7 +53,8 @@ func GenerateCreateTableIndentedColumnDefinition(col schema.Column, tableCollati
 			Comment:       col.Comment,
 			Generated:     genVal,
 			Virtual:       col.Virtual,
-		}, col.Default, tableCollation)
+			OnUpdate:      onUpdateVal,
+		}, col.Default, col.OnUpdate, tableCollation)
 }
 
 // GenerateCreateTableIndexDefinition returns index definition for CREATE TABLE statement with indentation of 2 spaces

go/libraries/doltcore/sqle/sqlutil/convert.go

@@ -40,19 +40,23 @@ func FromDoltSchema(dbName, tableName string, sch schema.Schema) (sql.PrimaryKey
 			extra = "auto_increment"
 		}
 
-		var deflt, generated *sql.ColumnDefaultValue
+		var deflt, generated, onUpdate *sql.ColumnDefaultValue
 		if col.Default != "" {
 			deflt = sql.NewUnresolvedColumnDefaultValue(col.Default)
 		}
 		if col.Generated != "" {
 			generated = sql.NewUnresolvedColumnDefaultValue(col.Generated)
 		}
+		if col.OnUpdate != "" {
+			onUpdate = sql.NewUnresolvedColumnDefaultValue(col.OnUpdate)
+		}
 
 		cols[i] = &sql.Column{
 			Name:           col.Name,
 			Type:           sqlType,
 			Default:        deflt,
 			Generated:      generated,
+			OnUpdate:       onUpdate,
 			Nullable:       col.IsNullable(),
 			DatabaseSource: dbName,
 			Source:         tableName,
@@ -141,14 +145,17 @@ func ToDoltCol(tag uint64, col *sql.Column) (schema.Column, error) {
 		return schema.Column{}, err
 	}
 
-	defaultVal := ""
-	generatedVal := ""
+	var defaultVal, generatedVal, onUpdateVal string
 	if col.Default != nil {
 		defaultVal = col.Default.String()
 	} else {
 		generatedVal = col.Generated.String()
 	}
 
+	if col.OnUpdate != nil {
+		onUpdateVal = col.OnUpdate.String()
+	}
+
 	c := schema.Column{
 		Name:          col.Name,
 		Tag:           tag,
@@ -157,6 +164,7 @@ func ToDoltCol(tag uint64, col *sql.Column) (schema.Column, error) {
 		TypeInfo:      typeInfo,
 		Default:       defaultVal,
 		Generated:     generatedVal,
+		OnUpdate:      onUpdateVal,
 		Virtual:       col.Virtual,
 		AutoIncrement: col.AutoIncrement,
 		Comment:       col.Comment,

go/serial/schema.fbs

@@ -24,6 +24,9 @@ table TableSchema {
   secondary_indexes:[Index];
   checks:[CheckConstraint];
   collation:Collation;
+
+  // this field is necessary because older dolt clients weren't using TryAccessor for Columns, but are in TableSchemas
+  has_features_after_try_accessors:bool;
 }
 
 table Column {
@@ -55,6 +58,9 @@ table Column {
   hidden:bool;
   generated:bool;
   virtual:bool;
+
+  // sql on update value
+  on_update_value:string;
 }
 
 table Index {