in google-cloud-spanner-hibernate-dialect/src/main/java/com/google/cloud/spanner/hibernate/schema/SpannerSchemaMigrator.java [48:71]
public void doMigration(
Metadata metadata,
ExecutionOptions options,
ContributableMatcher contributableInclusionFilter,
TargetDescriptor targetDescriptor) {
// Add auxiliary database objects to batch DDL statements
metadata.getDatabase().addAuxiliaryDatabaseObject(new StartBatchDdl(Action.UPDATE));
metadata.getDatabase().addAuxiliaryDatabaseObject(new RunBatchDdl(Action.UPDATE));
DdlTransactionIsolator isolator = tool.getDdlTransactionIsolator(options);
try {
Connection connection = isolator.getIsolatedConnection();
SpannerDatabaseInfo spannerDatabaseInfo =
new SpannerDatabaseInfo(metadata.getDatabase(), connection.getMetaData());
tool.getSpannerTableExporter(options).init(metadata, spannerDatabaseInfo, Action.UPDATE);
tool.getForeignKeyExporter(options).init(spannerDatabaseInfo);
schemaMigrator.doMigration(metadata, options, contributableInclusionFilter, targetDescriptor);
} catch (SQLException e) {
throw new RuntimeException("Failed to update Spanner table schema.", e);
} finally {
isolator.release();
}
}