Update gauss.go

replace Postgres comments to GaussDB

backend/plugin/db/gauss/gauss.go

@@ -6,18 +6,18 @@
  "fmt"
  "log/slog"
  "net"
  "regexp"
  "strings"
  "time"
  "strconv"
 
  //opengauss driver
  _ "gitee.com/opengauss/openGauss-connector-go-pq"
  //"github.com/jackc/pgx/v5"
  //"github.com/jackc/pgx/v5/stdlib"
 
  "github.com/pkg/errors"
  //"go.uber.org/multierr"
  "golang.org/x/crypto/ssh"
  "google.golang.org/protobuf/types/known/durationpb"
 
@@ -50,12 +50,12 @@
  db.Register(storepb.Engine_GAUSSDB, newDriver)
 }
 
-// Driver is the Postgres driver.
+// Driver is the GaussDB driver.
 type Driver struct {
  config db.ConnectionConfig
 
  db *sql.DB
  sshClient *ssh.Client
  // connectionString is the connection string registered by pgx.
  // Unregister connectionString if we don't need it.
  connectionString string
@@ -66,9 +66,9 @@
  return &Driver{}
 }
 
-// Open opens a Postgres driver.
+// Open opens a GaussDB driver.
 func (driver *Driver) Open(_ context.Context, _ storepb.Engine, config db.ConnectionConfig) (db.Driver, error) {
- // Require username for Postgres, as the guessDSN 1st guess is to use the username as the connecting database
+ // Require username for GaussDB, as the guessDSN 1st guess is to use the username as the connecting database
  // if database name is not explicitly specified.
  if config.Username == "" {
  return nil, errors.Errorf("user must be set")
@@ -119,7 +119,7 @@
  return driver.db
 }
 
-// Execute will execute the statement. For CREATE DATABASE statement, some types of databases such as Postgres
+// Execute will execute the statement. For CREATE DATABASE statement, some types of databases such as GaussDB
 // will not use transactions to execute the statement but will still use transactions to execute the rest of statements.
 func (driver *Driver) Execute(ctx context.Context, statement string, opts db.ExecuteOptions) (int64, error) {
  if opts.CreateDatabase {
@@ -151,10 +151,6 @@
  }
 
  if isSuperuserStatement(singleSQL.Text) {
- // CREATE EVENT TRIGGER statement only supports EXECUTE PROCEDURE in version 10 and before, while newer version supports both EXECUTE { FUNCTION | PROCEDURE }.
- // Since we use pg_dump version 14, the dump uses a new style even for an old version of PostgreSQL.
- // We should convert EXECUTE FUNCTION to EXECUTE PROCEDURE to make the restoration work on old versions.
- // https://www.postgresql.org/docs/14/sql-createeventtrigger.html
  if strings.Contains(strings.ToUpper(singleSQL.Text), "CREATE EVENT TRIGGER") {
  singleSQL.Text = strings.ReplaceAll(singleSQL.Text, "EXECUTE FUNCTION", "EXECUTE PROCEDURE")
  }
@@ -188,7 +184,7 @@
  }
  defer tx.Rollback()
  // Set the current transaction role to the database owner so that the owner of created objects will be the same as the database owner.
  //if _, err := tx.ExecContext(ctx, fmt.Sprintf("SET SESSION AUTHORIZATION '%s';", owner)); err != nil {
  if _, err := tx.ExecContext(ctx, "SET SESSION AUTHORIZATION DEFAULT;"); err != nil {
  return 0, err
  }
@@ -349,7 +345,7 @@
 }
 
 // QueryConn queries a SQL statement in a given connection.
 func (driver *Driver) QueryConn(ctx context.Context, conn *sql.Conn, statement string, queryContext *db.QueryContext) ([]*v1pb.QueryResult, error) {
 
  singleSQLs, err := pgparser.SplitSQL(statement)
  if err != nil {