build(deps): bump github.com/jackc/pgx/v4 from 4.13.0 to 4.15.0

Bumps [github.com/jackc/pgx/v4](https://github.com/jackc/pgx) from 4.13.0 to 4.15.0.
- [Release notes](https://github.com/jackc/pgx/releases)
- [Changelog](https://github.com/jackc/pgx/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jackc/pgx/compare/v4.13.0...v4.15.0)

---
updated-dependencies:
- dependency-name: github.com/jackc/pgx/v4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/jackc/pgx/v4/batch.go

@@ -3,6 +3,7 @@ package pgx
 import (
 	"context"
 	"errors"
+	"fmt"
 
 	"github.com/jackc/pgconn"
 )
@@ -41,19 +42,23 @@ type BatchResults interface {
 	// QueryRow reads the results from the next query in the batch as if the query has been sent with Conn.QueryRow.
 	QueryRow() Row
 
+	// QueryFunc reads the results from the next query in the batch as if the query has been sent with Conn.QueryFunc.
+	QueryFunc(scans []interface{}, f func(QueryFuncRow) error) (pgconn.CommandTag, error)
+
 	// Close closes the batch operation. This must be called before the underlying connection can be used again. Any error
 	// that occurred during a batch operation may have made it impossible to resyncronize the connection with the server.
-	// In this case the underlying connection will have been closed.
+	// In this case the underlying connection will have been closed. Close is safe to call multiple times.
 	Close() error
 }
 
 type batchResults struct {
-	ctx  context.Context
-	conn *Conn
-	mrr  *pgconn.MultiResultReader
-	err  error
-	b    *Batch
-	ix   int
+	ctx    context.Context
+	conn   *Conn
+	mrr    *pgconn.MultiResultReader
+	err    error
+	b      *Batch
+	ix     int
+	closed bool
 }
 
 // Exec reads the results from the next query in the batch as if the query has been sent with Exec.
@@ -61,6 +66,9 @@ func (br *batchResults) Exec() (pgconn.CommandTag, error) {
 	if br.err != nil {
 		return nil, br.err
 	}
+	if br.closed {
+		return nil, fmt.Errorf("batch already closed")
+	}
 
 	query, arguments, _ := br.nextQueryAndArgs()
 
@@ -111,6 +119,11 @@ func (br *batchResults) Query() (Rows, error) {
 		return &connRows{err: br.err, closed: true}, br.err
 	}
 
+	if br.closed {
+		alreadyClosedErr := fmt.Errorf("batch already closed")
+		return &connRows{err: alreadyClosedErr, closed: true}, alreadyClosedErr
+	}
+
 	rows := br.conn.getRows(br.ctx, query, arguments)
 
 	if !br.mrr.NextResult() {
@@ -135,6 +148,37 @@ func (br *batchResults) Query() (Rows, error) {
 	return rows, nil
 }
 
+// QueryFunc reads the results from the next query in the batch as if the query has been sent with Conn.QueryFunc.
+func (br *batchResults) QueryFunc(scans []interface{}, f func(QueryFuncRow) error) (pgconn.CommandTag, error) {
+	if br.closed {
+		return nil, fmt.Errorf("batch already closed")
+	}
+
+	rows, err := br.Query()
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		err = rows.Scan(scans...)
+		if err != nil {
+			return nil, err
+		}
+
+		err = f(rows)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	return rows.CommandTag(), nil
+}
+
 // QueryRow reads the results from the next query in the batch as if the query has been sent with QueryRow.
 func (br *batchResults) QueryRow() Row {
 	rows, _ := br.Query()
@@ -149,6 +193,11 @@ func (br *batchResults) Close() error {
 		return br.err
 	}
 
+	if br.closed {
+		return nil
+	}
+	br.closed = true
+
 	// log any queries that haven't yet been logged by Exec or Query
 	for {
 		query, args, ok := br.nextQueryAndArgs()