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[MySQL] Optimizer hints

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go-jet 2022-09-29 13:33:00 +02:00
parent c9967d151e
commit f772f90336
12 changed files with 207 additions and 27 deletions
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23
mysql/select_statement.go
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@ -40,6 +40,8 @@ type SelectStatement interface {
jet.HasProjections
Expression
OPTIMIZER_HINTS(hints ...OptimizerHint) SelectStatement
DISTINCT() SelectStatement
FROM(tables ...ReadableTable) SelectStatement
WHERE(expression BoolExpression) SelectStatement
@ -65,9 +67,19 @@ func SELECT(projection Projection, projections ...Projection) SelectStatement {
func newSelectStatement(table ReadableTable, projections []Projection) SelectStatement {
newSelect := &selectStatementImpl{}
newSelect.ExpressionStatement = jet.NewExpressionStatementImpl(Dialect, jet.SelectStatementType, newSelect, &newSelect.Select,
&newSelect.From, &newSelect.Where, &newSelect.GroupBy, &newSelect.Having, &newSelect.Window, &newSelect.OrderBy,
&newSelect.Limit, &newSelect.Offset, &newSelect.For, &newSelect.ShareLock)
newSelect.ExpressionStatement = jet.NewExpressionStatementImpl(Dialect, jet.SelectStatementType, newSelect,
&newSelect.Select,
&newSelect.From,
&newSelect.Where,
&newSelect.GroupBy,
&newSelect.Having,
&newSelect.Window,
&newSelect.OrderBy,
&newSelect.Limit,
&newSelect.Offset,
&newSelect.For,
&newSelect.ShareLock,
)
newSelect.Select.ProjectionList = projections
if table != nil {
@ -100,6 +112,11 @@ type selectStatementImpl struct {
ShareLock jet.ClauseOptional
}
func (s *selectStatementImpl) OPTIMIZER_HINTS(hints ...OptimizerHint) SelectStatement {
s.Select.OptimizerHints = hints
return s
}
func (s *selectStatementImpl) DISTINCT() SelectStatement {
s.Select.Distinct = true
return s