flyrain commented on code in PR #1843:
URL: https://github.com/apache/polaris/pull/1843#discussion_r2138513484
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persistence/relational-jdbc/src/main/java/org/apache/polaris/persistence/relational/jdbc/DatasourceOperations.java:
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@@ -55,64 +55,71 @@ public class DatasourceOperations {
private final DataSource datasource;
private final RelationalJdbcConfiguration relationalJdbcConfiguration;
- private final DatabaseType databaseType;
+ private volatile DatabaseType databaseType;
private final Random random = new Random();
public DatasourceOperations(
- DataSource datasource,
- DatabaseType databaseType,
- RelationalJdbcConfiguration relationalJdbcConfiguration) {
+ DataSource datasource, RelationalJdbcConfiguration
relationalJdbcConfiguration) {
this.datasource = datasource;
- this.databaseType = databaseType;
this.relationalJdbcConfiguration = relationalJdbcConfiguration;
}
- public DatabaseType getDatabaseType() {
+ protected DatabaseType getDatabaseType() throws SQLException {
+ if (databaseType == null) {
+ synchronized (this) {
+ if (databaseType == null) {
+ try (Connection connection = datasource.getConnection()) {
+ String productName =
connection.getMetaData().getDatabaseProductName();
+ return DatabaseType.fromDisplayName(productName);
+ }
+ }
+ }
Review Comment:
Can we set it in the constructor?
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