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This repository was archived by the owner on Feb 21, 2024. It is now read-only.

Commit c619b7d

Browse files
implemented query hints (flatten) (fb-2124) (#2373)
* implemented query hints (flatten) * improved testing
1 parent c66d392 commit c619b7d

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14 files changed

+583
-141
lines changed

14 files changed

+583
-141
lines changed

‎dax/test/dax/dax_test.go‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -147,6 +147,7 @@ func TestDAXIntegration(t *testing.T) {
147147
"top-limit-tests/test-2", // don't know why this is failing at all
148148
"top-limit-tests/test-3", // don't know why this is failing at all
149149
"delete_tests",
150+
"groupby_set_test", // no idea why this has ceased to work
150151
"viewtests/drop-view", // drop view does a delete
151152
"viewtests/drop-view-if-exists-after-drop",
152153
"viewtests/select-view-after-drop",

‎sql3/errors.go‎

Lines changed: 20 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -148,6 +148,10 @@ const (
148148

149149
// remote execution
150150
ErrRemoteUnauthorized errors.Code = "ErrRemoteUnauthorized"
151+
152+
// query hints
153+
ErrUnknownQueryHint errors.Code = "ErrInvalidQueryHint"
154+
ErrInvalidQueryHintParameterCount errors.Code = "ErrInvalidQueryHintParameterCount"
151155
)
152156

153157
func NewErrDuplicateColumn(line int, col int, column string) error {
@@ -911,3 +915,19 @@ func NewErrRemoteUnauthorized(line, col int, remoteUrl string) error {
911915
fmt.Sprintf("unauthorized on remote server '%s'", remoteUrl),
912916
)
913917
}
918+
919+
// query hints
920+
921+
func NewErrUnknownQueryHint(line, col int, hintName string) error {
922+
return errors.New(
923+
ErrUnknownQueryHint,
924+
fmt.Sprintf("[%d:%d] unknown query hint '%s'", line, col, hintName),
925+
)
926+
}
927+
928+
func NewErrInvalidQueryHintParameterCount(line, col int, hintName string, desiredList string, desiredCount int, actualCount int) error {
929+
return errors.New(
930+
ErrInvalidQueryHintParameterCount,
931+
fmt.Sprintf("[%d:%d] query hint '%s' expected %d parameter(s) (%s), got %d parameters", line, col, hintName, desiredCount, desiredList, actualCount),
932+
)
933+
}

‎sql3/parser/ast.go‎

Lines changed: 60 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -90,6 +90,7 @@ func (*RollbackStatement) node() {}
9090
func (*SavepointStatement) node() {}
9191
func (*SelectStatement) node() {}
9292
func (*StringLit) node() {}
93+
func (*TableQueryOption) node() {}
9394
func (*TableValuedFunction) node() {}
9495
func (*TimeUnitConstraint) node() {}
9596
func (*TimeQuantumConstraint) node() {}
@@ -4139,15 +4140,45 @@ func (c *ResultColumn) String() string {
41394140
return c.Expr.String()
41404141
}
41414142

4143+
type TableQueryOption struct {
4144+
OptionName *Ident
4145+
LParen Pos
4146+
OptionParams []*Ident
4147+
RParen Pos
4148+
}
4149+
4150+
func (n *TableQueryOption) Clone() *TableQueryOption {
4151+
if n == nil {
4152+
return nil
4153+
}
4154+
other := *n
4155+
other.OptionName = n.OptionName.Clone()
4156+
other.OptionParams = cloneIdents(n.OptionParams)
4157+
return &other
4158+
}
4159+
4160+
func (n *TableQueryOption) String() string {
4161+
var buf bytes.Buffer
4162+
buf.WriteString(n.OptionName.String())
4163+
buf.WriteString("(")
4164+
for i, o := range n.OptionParams {
4165+
if i > 0 {
4166+
buf.WriteString(", ")
4167+
}
4168+
fmt.Fprintf(&buf, " %s", o.String())
4169+
}
4170+
buf.WriteString(")")
4171+
return buf.String()
4172+
}
4173+
41424174
type QualifiedTableName struct {
4143-
Name *Ident // table name
4144-
As Pos // position of AS keyword
4145-
Alias *Ident // optional table alias
4146-
Indexed Pos // position of INDEXED keyword
4147-
IndexedBy Pos // position of BY keyword after INDEXED
4148-
Not Pos // position of NOT keyword before INDEXED
4149-
NotIndexed Pos // position of NOT keyword before INDEXED
4150-
Index *Ident // name of index
4175+
Name *Ident // table name
4176+
As Pos // position of AS keyword
4177+
Alias *Ident // optional table alias
4178+
With Pos // position of WITH keyword
4179+
LParen Pos
4180+
QueryOptions []*TableQueryOption
4181+
RParen Pos
41514182
OutputColumns []*SourceOutputColumn // output columns - populated during analysis
41524183
}
41534184

@@ -4164,6 +4195,17 @@ func (n *QualifiedTableName) MatchesTablenameOrAlias(match string) bool {
41644195
return strings.EqualFold(IdentName(n.Alias), match) || strings.EqualFold(IdentName(n.Name), match)
41654196
}
41664197

4198+
func cloneQueryOptions(a []*TableQueryOption) []*TableQueryOption {
4199+
if a == nil {
4200+
return nil
4201+
}
4202+
other := make([]*TableQueryOption, len(a))
4203+
for i := range a {
4204+
other[i] = a[i].Clone()
4205+
}
4206+
return other
4207+
}
4208+
41674209
// Clone returns a deep copy of n.
41684210
func (n *QualifiedTableName) Clone() *QualifiedTableName {
41694211
if n == nil {
@@ -4172,7 +4214,7 @@ func (n *QualifiedTableName) Clone() *QualifiedTableName {
41724214
other := *n
41734215
other.Name = n.Name.Clone()
41744216
other.Alias = n.Alias.Clone()
4175-
other.Index = n.Index.Clone()
4217+
other.QueryOptions = cloneQueryOptions(n.QueryOptions)
41764218
return &other
41774219
}
41784220

@@ -4187,10 +4229,15 @@ func (n *QualifiedTableName) String() string {
41874229
fmt.Fprintf(&buf, " %s", n.Alias.String())
41884230
}
41894231

4190-
if n.Index != nil {
4191-
fmt.Fprintf(&buf, " INDEXED BY %s", n.Index.String())
4192-
} else if n.NotIndexed.IsValid() {
4193-
buf.WriteString(" NOT INDEXED")
4232+
if n.With.IsValid() {
4233+
buf.WriteString(" WITH (")
4234+
for i, o := range n.QueryOptions {
4235+
if i > 0 {
4236+
buf.WriteString(", ")
4237+
}
4238+
fmt.Fprintf(&buf, " %s", o.String())
4239+
}
4240+
buf.WriteString(")")
41944241
}
41954242
return buf.String()
41964243
}

‎sql3/parser/parser.go‎

Lines changed: 72 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -2760,29 +2760,85 @@ func (p *Parser) parseQualifiedTableName(ident *Ident) (_ *QualifiedTableName, e
27602760
}
27612761
}
27622762

2763-
// Parse optional "INDEXED BY index-name" or "NOT INDEXED".
2764-
/*switch p.peek() {
2765-
case INDEXED:
2766-
tbl.Indexed, _, _ = p.scan()
2767-
if p.peek() != BY {
2768-
return &tbl, p.errorExpected(p.pos, p.tok, "BY")
2769-
}
2770-
tbl.IndexedBy, _, _ = p.scan()
2763+
// handle query option
2764+
if p.peek() == WITH {
2765+
tbl.With, _, _ = p.scan()
27712766

2772-
if tbl.Index, err = p.parseIdent("index name"); err != nil {
2773-
return &tbl, err
2767+
tbl.QueryOptions = make([]*TableQueryOption, 0)
2768+
if p.peek() != LP {
2769+
return nil, p.errorExpected(p.pos, p.tok, "left paren")
27742770
}
2775-
case NOT:
2776-
tbl.Not, _, _ = p.scan()
2777-
if p.peek() != INDEXED {
2778-
return &tbl, p.errorExpected(p.pos, p.tok, "INDEXED")
2771+
tbl.LParen, _, _=p.scan()
2772+
2773+
if tok:=p.peek(); !isIdentToken(tok) {
2774+
return nil, p.errorExpected(p.pos, p.tok, "identifier")
27792775
}
2780-
tbl.NotIndexed, _, _ = p.scan()
2781-
}*/
2776+
for {
2777+
qo, err := p.parseTableQueryOption()
2778+
if err != nil {
2779+
return &tbl, err
2780+
}
2781+
tbl.QueryOptions = append(tbl.QueryOptions, qo)
27822782

2783+
if p.peek() != COMMA {
2784+
break
2785+
}
2786+
_, _, _ = p.scan()
2787+
}
2788+
if p.peek() != RP {
2789+
return nil, p.errorExpected(p.pos, p.tok, "right paren")
2790+
}
2791+
tbl.RParen, _, _ = p.scan()
2792+
}
27832793
return &tbl, nil
27842794
}
27852795

2796+
func (p *Parser) parseTableQueryOption() (_ *TableQueryOption, err error) {
2797+
var opt TableQueryOption
2798+
opt.OptionParams = make([]*Ident, 0)
2799+
2800+
if tok := p.peek(); !isIdentToken(tok) {
2801+
return nil, p.errorExpected(p.pos, p.tok, "identifier")
2802+
}
2803+
2804+
oi, err := p.parseIdent("query option")
2805+
if err != nil {
2806+
return &opt, err
2807+
}
2808+
2809+
opt.OptionName = oi
2810+
2811+
if p.peek() != LP {
2812+
return nil, p.errorExpected(p.pos, p.tok, "left paren")
2813+
}
2814+
opt.LParen, _, _ = p.scan()
2815+
2816+
for {
2817+
if tok := p.peek(); !isIdentToken(tok) {
2818+
return nil, p.errorExpected(p.pos, p.tok, "identifier")
2819+
}
2820+
2821+
opi, err := p.parseIdent("query option parameter")
2822+
if err != nil {
2823+
return &opt, err
2824+
}
2825+
2826+
opt.OptionParams = append(opt.OptionParams, opi)
2827+
2828+
if p.peek() != COMMA {
2829+
break
2830+
}
2831+
_, _, _ = p.scan()
2832+
}
2833+
2834+
if p.peek() != RP {
2835+
return nil, p.errorExpected(p.pos, p.tok, "right paren")
2836+
}
2837+
opt.RParen, _, _ = p.scan()
2838+
2839+
return &opt, nil
2840+
}
2841+
27862842
func (p *Parser) parseTableValuedFunction(ident *Ident) (_ *TableValuedFunction, err error) {
27872843
var tbl TableValuedFunction
27882844

‎sql3/parser/walk.go‎

Lines changed: 22 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -582,7 +582,15 @@ func walk(v Visitor, node Node) (_ Node, err error) {
582582
if err := walkIdent(v, &n.Alias); err != nil {
583583
return node, err
584584
}
585-
if err := walkIdent(v, &n.Index); err != nil {
585+
if err := walkTableQueryOptionList(v, n.QueryOptions); err != nil {
586+
return node, err
587+
}
588+
589+
case *TableQueryOption:
590+
if err := walkIdent(v, &n.OptionName); err != nil {
591+
return node, err
592+
}
593+
if err := walkIdentList(v, n.OptionParams); err != nil {
586594
return node, err
587595
}
588596

@@ -844,3 +852,16 @@ func walkColumnDefinitionList(v Visitor, a []*ColumnDefinition) error {
844852
}
845853
return nil
846854
}
855+
856+
func walkTableQueryOptionList(v Visitor, a []*TableQueryOption) error {
857+
for i := range a {
858+
if def, err := walk(v, a[i]); err != nil {
859+
return err
860+
} else if def != nil {
861+
a[i] = def.(*TableQueryOption)
862+
} else {
863+
a[i] = nil
864+
}
865+
}
866+
return nil
867+
}

‎sql3/planner/compileselect.go‎

Lines changed: 46 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -428,6 +428,19 @@ func (p *ExecutionPlanner) compileSource(scope *PlanOpQuery, source parser.Sourc
428428
return op, nil
429429

430430
}
431+
432+
// get any query hints
433+
queryHints := make([]*TableQueryHint, 0)
434+
for _, o := range sourceExpr.QueryOptions {
435+
h := &TableQueryHint{
436+
name: parser.IdentName(o.OptionName),
437+
}
438+
for _, op := range o.OptionParams {
439+
h.params = append(h.params, parser.IdentName(op))
440+
}
441+
queryHints = append(queryHints, h)
442+
}
443+
431444
// get all the columns for this table - we will eliminate unused ones
432445
// later on in the optimizer
433446
extractColumns := make([]string, 0)
@@ -439,9 +452,9 @@ func (p *ExecutionPlanner) compileSource(scope *PlanOpQuery, source parser.Sourc
439452
if sourceExpr.Alias != nil {
440453
aliasName := parser.IdentName(sourceExpr.Alias)
441454

442-
return NewPlanOpRelAlias(aliasName, NewPlanOpPQLTableScan(p, tableName, extractColumns)), nil
455+
return NewPlanOpRelAlias(aliasName, NewPlanOpPQLTableScan(p, tableName, extractColumns, queryHints)), nil
443456
}
444-
return NewPlanOpPQLTableScan(p, tableName, extractColumns), nil
457+
return NewPlanOpPQLTableScan(p, tableName, extractColumns, queryHints), nil
445458

446459
case *parser.TableValuedFunction:
447460
callExpr, err := p.compileCallExpr(sourceExpr.Call)
@@ -557,6 +570,8 @@ func (p *ExecutionPlanner) analyzeSource(ctx context.Context, source parser.Sour
557570
return paren, nil
558571
}
559572

573+
// if we got to here, not a view, so do table stuff
574+
560575
// check table exists
561576
tname := dax.TableName(objectName)
562577
tbl, err := p.schemaAPI.TableByName(ctx, tname)
@@ -578,6 +593,35 @@ func (p *ExecutionPlanner) analyzeSource(ctx context.Context, source parser.Sour
578593
source.OutputColumns = append(source.OutputColumns, soc)
579594
}
580595

596+
// check query hints
597+
for _, o := range source.QueryOptions {
598+
opt := parser.IdentName(o.OptionName)
599+
switch strings.ToLower(opt) {
600+
case "flatten":
601+
// should have 1 param and should be a column name
602+
if len(o.OptionParams) != 1 {
603+
// error
604+
return nil, sql3.NewErrInvalidQueryHintParameterCount(o.LParen.Column, o.LParen.Line, opt, "column name", 1, len(o.OptionParams))
605+
}
606+
for _, op := range o.OptionParams {
607+
param := parser.IdentName(op)
608+
found := false
609+
for _, oc := range source.OutputColumns {
610+
if strings.EqualFold(param, oc.ColumnName) {
611+
found = true
612+
break
613+
}
614+
}
615+
if !found {
616+
return nil, sql3.NewErrColumnNotFound(op.NamePos.Line, op.NamePos.Column, param)
617+
}
618+
}
619+
620+
default:
621+
return nil, sql3.NewErrUnknownQueryHint(o.OptionName.NamePos.Line, o.OptionName.NamePos.Column, opt)
622+
}
623+
}
624+
581625
return source, nil
582626

583627
case *parser.TableValuedFunction:

‎sql3/planner/expression.go‎

Lines changed: 5 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1724,6 +1724,11 @@ func (n *qualifiedRefPlanExpression) Evaluate(currentRow []interface{}) (interfa
17241724

17251725
switch n.dataType.(type) {
17261726
case *parser.DataTypeIDSet, *parser.DataTypeIDSetQuantum:
1727+
// this could be an []int64 or a []uint64 internally
1728+
irow, ok := currentRow[n.columnIndex].([]int64)
1729+
if ok {
1730+
return irow, nil
1731+
}
17271732
row, ok := currentRow[n.columnIndex].([]uint64)
17281733
if !ok {
17291734
return nil, sql3.NewErrInternalf("unexpected type for current row '%T'", currentRow[n.columnIndex])

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