[chore] bump db dependencies (#1366)

vendor/github.com/uptrace/bun/query_merge.go

@@ -0,0 +1,322 @@
+package bun
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+
+	"github.com/uptrace/bun/dialect"
+	"github.com/uptrace/bun/dialect/feature"
+	"github.com/uptrace/bun/internal"
+	"github.com/uptrace/bun/schema"
+)
+
+type MergeQuery struct {
+	baseQuery
+	returningQuery
+
+	using schema.QueryWithArgs
+	on    schema.QueryWithArgs
+	when  []schema.QueryAppender
+}
+
+var _ Query = (*MergeQuery)(nil)
+
+func NewMergeQuery(db *DB) *MergeQuery {
+	q := &MergeQuery{
+		baseQuery: baseQuery{
+			db:   db,
+			conn: db.DB,
+		},
+	}
+	if !(q.db.dialect.Name() == dialect.MSSQL || q.db.dialect.Name() == dialect.PG) {
+		q.err = errors.New("bun: merge not supported for current dialect")
+	}
+	return q
+}
+
+func (q *MergeQuery) Conn(db IConn) *MergeQuery {
+	q.setConn(db)
+	return q
+}
+
+func (q *MergeQuery) Model(model interface{}) *MergeQuery {
+	q.setModel(model)
+	return q
+}
+
+func (q *MergeQuery) Err(err error) *MergeQuery {
+	q.setErr(err)
+	return q
+}
+
+// Apply calls the fn passing the MergeQuery as an argument.
+func (q *MergeQuery) Apply(fn func(*MergeQuery) *MergeQuery) *MergeQuery {
+	if fn != nil {
+		return fn(q)
+	}
+	return q
+}
+
+func (q *MergeQuery) With(name string, query schema.QueryAppender) *MergeQuery {
+	q.addWith(name, query, false)
+	return q
+}
+
+func (q *MergeQuery) WithRecursive(name string, query schema.QueryAppender) *MergeQuery {
+	q.addWith(name, query, true)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *MergeQuery) Table(tables ...string) *MergeQuery {
+	for _, table := range tables {
+		q.addTable(schema.UnsafeIdent(table))
+	}
+	return q
+}
+
+func (q *MergeQuery) TableExpr(query string, args ...interface{}) *MergeQuery {
+	q.addTable(schema.SafeQuery(query, args))
+	return q
+}
+
+func (q *MergeQuery) ModelTableExpr(query string, args ...interface{}) *MergeQuery {
+	q.modelTableName = schema.SafeQuery(query, args)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+// Returning adds a RETURNING clause to the query.
+//
+// To suppress the auto-generated RETURNING clause, use `Returning("NULL")`.
+// Only for mssql output, postgres not supported returning in merge query
+func (q *MergeQuery) Returning(query string, args ...interface{}) *MergeQuery {
+	q.addReturning(schema.SafeQuery(query, args))
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *MergeQuery) Using(s string, args ...interface{}) *MergeQuery {
+	q.using = schema.SafeQuery(s, args)
+	return q
+}
+
+func (q *MergeQuery) On(s string, args ...interface{}) *MergeQuery {
+	q.on = schema.SafeQuery(s, args)
+	return q
+}
+
+// WhenInsert for when insert clause.
+func (q *MergeQuery) WhenInsert(expr string, fn func(q *InsertQuery) *InsertQuery) *MergeQuery {
+	sq := NewInsertQuery(q.db)
+	// apply the model as default into sub query, since appendColumnsValues required
+	if q.model != nil {
+		sq = sq.Model(q.model)
+	}
+	sq = sq.Apply(fn)
+	q.when = append(q.when, &whenInsert{expr: expr, query: sq})
+	return q
+}
+
+// WhenUpdate for when update clause.
+func (q *MergeQuery) WhenUpdate(expr string, fn func(q *UpdateQuery) *UpdateQuery) *MergeQuery {
+	sq := NewUpdateQuery(q.db)
+	// apply the model as default into sub query
+	if q.model != nil {
+		sq = sq.Model(q.model)
+	}
+	sq = sq.Apply(fn)
+	q.when = append(q.when, &whenUpdate{expr: expr, query: sq})
+	return q
+}
+
+// WhenDelete for when delete clause.
+func (q *MergeQuery) WhenDelete(expr string) *MergeQuery {
+	q.when = append(q.when, &whenDelete{expr: expr})
+	return q
+}
+
+// When for raw expression clause.
+func (q *MergeQuery) When(expr string, args ...interface{}) *MergeQuery {
+	q.when = append(q.when, schema.SafeQuery(expr, args))
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *MergeQuery) Operation() string {
+	return "MERGE"
+}
+
+func (q *MergeQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	if q.err != nil {
+		return nil, q.err
+	}
+
+	fmter = formatterWithModel(fmter, q)
+
+	b, err = q.appendWith(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	b = append(b, "MERGE "...)
+	if q.db.dialect.Name() == dialect.PG {
+		b = append(b, "INTO "...)
+	}
+
+	b, err = q.appendFirstTableWithAlias(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	b = append(b, " USING "...)
+	b, err = q.using.AppendQuery(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	b = append(b, " ON "...)
+	b, err = q.on.AppendQuery(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, w := range q.when {
+		b = append(b, " WHEN "...)
+		b, err = w.AppendQuery(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if q.hasFeature(feature.Output) && q.hasReturning() {
+		b = append(b, " OUTPUT "...)
+		b, err = q.appendOutput(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	// A MERGE statement must be terminated by a semi-colon (;).
+	b = append(b, ";"...)
+
+	return b, nil
+}
+
+//------------------------------------------------------------------------------
+
+func (q *MergeQuery) Scan(ctx context.Context, dest ...interface{}) error {
+	_, err := q.scanOrExec(ctx, dest, true)
+	return err
+}
+
+func (q *MergeQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
+	return q.scanOrExec(ctx, dest, len(dest) > 0)
+}
+
+func (q *MergeQuery) scanOrExec(
+	ctx context.Context, dest []interface{}, hasDest bool,
+) (sql.Result, error) {
+	if q.err != nil {
+		return nil, q.err
+	}
+
+	// Run append model hooks before generating the query.
+	if err := q.beforeAppendModel(ctx, q); err != nil {
+		return nil, err
+	}
+
+	// Generate the query before checking hasReturning.
+	queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
+	if err != nil {
+		return nil, err
+	}
+
+	useScan := hasDest || (q.hasReturning() && q.hasFeature(feature.InsertReturning|feature.Output))
+	var model Model
+
+	if useScan {
+		var err error
+		model, err = q.getModel(dest)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	query := internal.String(queryBytes)
+	var res sql.Result
+
+	if useScan {
+		res, err = q.scan(ctx, q, query, model, true)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		res, err = q.exec(ctx, q, query)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return res, nil
+}
+
+func (q *MergeQuery) String() string {
+	buf, err := q.AppendQuery(q.db.Formatter(), nil)
+	if err != nil {
+		panic(err)
+	}
+
+	return string(buf)
+}
+
+//------------------------------------------------------------------------------
+
+type whenInsert struct {
+	expr  string
+	query *InsertQuery
+}
+
+func (w *whenInsert) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	b = append(b, w.expr...)
+	if w.query != nil {
+		b = append(b, " THEN INSERT"...)
+		b, err = w.query.appendColumnsValues(fmter, b, true)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return b, nil
+}
+
+type whenUpdate struct {
+	expr  string
+	query *UpdateQuery
+}
+
+func (w *whenUpdate) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	b = append(b, w.expr...)
+	if w.query != nil {
+		b = append(b, " THEN UPDATE SET "...)
+		b, err = w.query.appendSet(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+	return b, nil
+}
+
+type whenDelete struct {
+	expr string
+}
+
+func (w *whenDelete) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	b = append(b, w.expr...)
+	b = append(b, " THEN DELETE"...)
+	return b, nil
+}