60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package clause
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type OnConflict struct {
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Columns []Column
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Where Where
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TargetWhere Where
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OnConstraint string
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DoNothing bool
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DoUpdates Set
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UpdateAll bool
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}
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func (OnConflict) Name() string {
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return "ON CONFLICT"
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}
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// Build build onConflict clause
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func (onConflict OnConflict) Build(builder Builder) {
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if onConflict.OnConstraint != "" {
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builder.WriteString("ON CONSTRAINT ")
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builder.WriteString(onConflict.OnConstraint)
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builder.WriteByte(' ')
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} else {
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if len(onConflict.Columns) > 0 {
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builder.WriteByte('(')
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for idx, column := range onConflict.Columns {
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if idx > 0 {
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builder.WriteByte(',')
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}
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builder.WriteQuoted(column)
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}
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builder.WriteString(`) `)
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}
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if len(onConflict.TargetWhere.Exprs) > 0 {
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builder.WriteString(" WHERE ")
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onConflict.TargetWhere.Build(builder)
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builder.WriteByte(' ')
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}
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}
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if onConflict.DoNothing {
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builder.WriteString("DO NOTHING")
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} else {
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builder.WriteString("DO UPDATE SET ")
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onConflict.DoUpdates.Build(builder)
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}
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if len(onConflict.Where.Exprs) > 0 {
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builder.WriteString(" WHERE ")
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onConflict.Where.Build(builder)
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builder.WriteByte(' ')
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}
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}
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// MergeClause merge onConflict clauses
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func (onConflict OnConflict) MergeClause(clause *Clause) {
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clause.Expression = onConflict
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}
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