slack-19.0: optimize sqlutils.ToSqlite3Dialect

Signed-off-by: Tim Vaillancourt <tim@timvaillancourt.com>

go/vt/external/golib/sqlutils/sqlite_dialect.go

@@ -116,19 +116,19 @@ func ToSqlite3CreateTable(statement string) string {
 }
 
 func ToSqlite3Insert(statement string) string {
+	statement = applyConversions(statement, sqlite3GeneralConversions)
 	return applyConversions(statement, sqlite3InsertConversions)
 }
 
 func ToSqlite3Dialect(statement string) (translated string) {
+	if IsInsert(statement) {
+		return ToSqlite3Insert(statement)
+	}
 	if IsCreateTable(statement) {
 		return ToSqlite3CreateTable(statement)
 	}
 	if IsAlterTable(statement) {
 		return ToSqlite3CreateTable(statement)
 	}
-	statement = applyConversions(statement, sqlite3GeneralConversions)
-	if IsInsert(statement) {
-		return ToSqlite3Insert(statement)
-	}
-	return statement
+	return applyConversions(statement, sqlite3GeneralConversions)
 }

go/vt/external/golib/sqlutils/sqlite_dialect_test.go

@@ -312,3 +312,22 @@ func TestToSqlite3Dialect(t *testing.T) {
 		})
 	}
 }
+
+func BenchmarkToSqlite3Dialect_Insert(b *testing.B) {
+	statement := `INSERT ignore INTO database_instance
+				(alias, hostname, port, last_checked, last_attempted_check, last_check_partial_success, server_id, server_uuid,
+				version, major_version, version_comment, binlog_server, read_only, binlog_format,
+				binlog_row_image, log_bin, log_replica_updates, binary_log_file, binary_log_pos, source_host, source_port, replica_net_timeout, heartbeat_interval,
+				replica_sql_running, replica_io_running, replication_sql_thread_state, replication_io_thread_state, has_replication_filters, supports_oracle_gtid, oracle_gtid, source_uuid, ancestry_uuid, executed_gtid_set, gtid_mode, gtid_purged, gtid_errant, mariadb_gtid, pseudo_gtid,
+				source_log_file, read_source_log_pos, relay_source_log_file, exec_source_log_pos, relay_log_file, relay_log_pos, last_sql_error, last_io_error, replication_lag_seconds, replica_lag_seconds, sql_delay, data_center, region, physical_environment, replication_depth, is_co_primary, has_replication_credentials, allow_tls, semi_sync_enforced, semi_sync_primary_enabled, semi_sync_primary_timeout, semi_sync_primary_wait_for_replica_count, semi_sync_replica_enabled, semi_sync_primary_status, semi_sync_primary_clients, semi_sync_replica_status, last_discovery_latency, last_seen)
+		VALUES
+				(?, ?, ?, NOW(), NOW(), 1, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, NOW())
+		ON DUPLICATE KEY UPDATE
+				alias=VALUES(alias), hostname=VALUES(hostname), port=VALUES(port), last_checked=VALUES(last_checked), last_attempted_check=VALUES(last_attempted_check), last_check_partial_success=VALUES(last_check_partial_success), server_id=VALUES(server_id), server_uuid=VALUES(server_uuid), version=VALUES(version), major_version=VALUES(major_version), version_comment=VALUES(version_comment), binlog_server=VALUES(binlog_server), read_only=VALUES(read_only), binlog_format=VALUES(binlog_format), binlog_row_image=VALUES(binlog_row_image), log_bin=VALUES(log_bin), log_replica_updates=VALUES(log_replica_updates), binary_log_file=VALUES(binary_log_file), binary_log_pos=VALUES(binary_log_pos), source_host=VALUES(source_host), source_port=VALUES(source_port), replica_net_timeout=VALUES(replica_net_timeout), heartbeat_interval=VALUES(heartbeat_interval), replica_sql_running=VALUES(replica_sql_running), replica_io_running=VALUES(replica_io_running), replication_sql_thread_state=VALUES(replication_sql_thread_state), replication_io_thread_state=VALUES(replication_io_thread_state), has_replication_filters=VALUES(has_replication_filters), supports_oracle_gtid=VALUES(supports_oracle_gtid), oracle_gtid=VALUES(oracle_gtid), source_uuid=VALUES(source_uuid), ancestry_uuid=VALUES(ancestry_uuid), executed_gtid_set=VALUES(executed_gtid_set), gtid_mode=VALUES(gtid_mode), gtid_purged=VALUES(gtid_purged), gtid_errant=VALUES(gtid_errant), mariadb_gtid=VALUES(mariadb_gtid), pseudo_gtid=VALUES(pseudo_gtid), source_log_file=VALUES(source_log_file), read_source_log_pos=VALUES(read_source_log_pos), relay_source_log_file=VALUES(relay_source_log_file), exec_source_log_pos=VALUES(exec_source_log_pos), relay_log_file=VALUES(relay_log_file), relay_log_pos=VALUES(relay_log_pos), last_sql_error=VALUES(last_sql_error), last_io_error=VALUES(last_io_error), replication_lag_seconds=VALUES(replication_lag_seconds), replica_lag_seconds=VALUES(replica_lag_seconds), sql_delay=VALUES(sql_delay), data_center=VALUES(data_center), region=VALUES(region), physical_environment=VALUES(physical_environment), replication_depth=VALUES(replication_depth), is_co_primary=VALUES(is_co_primary), has_replication_credentials=VALUES(has_replication_credentials), allow_tls=VALUES(allow_tls),
+				semi_sync_enforced=VALUES(semi_sync_enforced), semi_sync_primary_enabled=VALUES(semi_sync_primary_enabled), semi_sync_primary_timeout=VALUES(semi_sync_primary_timeout), semi_sync_primary_wait_for_replica_count=VALUES(semi_sync_primary_wait_for_replica_count), semi_sync_replica_enabled=VALUES(semi_sync_replica_enabled), semi_sync_primary_status=VALUES(semi_sync_primary_status), semi_sync_primary_clients=VALUES(semi_sync_primary_clients), semi_sync_replica_status=VALUES(semi_sync_replica_status),
+				last_discovery_latency=VALUES(last_discovery_latency), last_seen=VALUES(last_seen)
+       `
+	for i := 0; i < b.N; i++ {
+		ToSqlite3Dialect(statement)
+	}
+}