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61 lines
1.4 KiB
61 lines
1.4 KiB
package clause
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import "sort"
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type Set []Assignment
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type Assignment struct {
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Column Column
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Value interface{}
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}
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func (set Set) Name() string {
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return "SET"
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}
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func (set Set) Build(builder Builder) {
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if len(set) > 0 {
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for idx, assignment := range set {
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if idx > 0 {
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builder.WriteByte(',')
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}
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builder.WriteQuoted(assignment.Column)
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builder.WriteByte('=')
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builder.AddVar(builder, assignment.Value)
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}
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} else {
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builder.WriteQuoted(Column{Name: PrimaryKey})
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builder.WriteByte('=')
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builder.WriteQuoted(Column{Name: PrimaryKey})
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}
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}
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// MergeClause merge assignments clauses
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func (set Set) MergeClause(clause *Clause) {
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copiedAssignments := make([]Assignment, len(set))
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copy(copiedAssignments, set)
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clause.Expression = Set(copiedAssignments)
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}
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func Assignments(values map[string]interface{}) Set {
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keys := make([]string, 0, len(values))
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for key := range values {
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keys = append(keys, key)
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}
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sort.Strings(keys)
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assignments := make([]Assignment, len(keys))
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for idx, key := range keys {
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assignments[idx] = Assignment{Column: Column{Name: key}, Value: values[key]}
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}
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return assignments
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}
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func AssignmentColumns(values []string) Set {
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assignments := make([]Assignment, len(values))
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for idx, value := range values {
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assignments[idx] = Assignment{Column: Column{Name: value}, Value: Column{Table: "excluded", Name: value}}
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}
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return assignments
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}
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