forked from CengSin/oracle
/
merge.go
49 lines (43 loc) · 964 Bytes
/
merge.go
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package clauses
import (
"gorm.io/gorm/clause"
)
type Merge struct {
Table clause.Table
Using []clause.Interface
On []clause.Expression
}
func (merge Merge) Name() string {
return "MERGE"
}
func MergeDefaultExcludeName() string {
return "exclude"
}
// Build build from clause
func (merge Merge) Build(builder clause.Builder) {
clause.Insert{}.Build(builder)
builder.WriteString(" USING (")
for idx, iface := range merge.Using {
if idx > 0 {
builder.WriteByte(' ')
}
builder.WriteString(iface.Name())
builder.WriteByte(' ')
iface.Build(builder)
}
builder.WriteString(") ")
builder.WriteString(MergeDefaultExcludeName())
builder.WriteString(" ON (")
for idx, on := range merge.On {
if idx > 0 {
builder.WriteString(", ")
}
on.Build(builder)
}
builder.WriteString(")")
}
// MergeClause merge values clauses
func (merge Merge) MergeClause(clause *clause.Clause) {
clause.Name = merge.Name()
clause.Expression = merge
}