{"record":{"id":"e287a6be35f1f85b","repo":"apache/seatunnel","slug":"s-s-type-doesn-t-have-a-mapping-to-the-sql-dat","errorCode":null,"errorMessage":"%s (%s) type doesn't have a mapping to the SQL database column type","messagePattern":"(.+?) \\((.+?)\\) type doesn't have a mapping to the SQL database column type","errorType":"exception","errorClass":"UnsupportedOperationException","httpStatus":null,"severity":"error","filePath":"seatunnel-connectors-v2/connector-jdbc/src/main/java/org/apache/seatunnel/connectors/seatunnel/jdbc/internal/dialect/GenericTypeConverter.java","lineNumber":195,"sourceCode":"            case Types.ROWID:\n            default:\n                log.warn(\n                        \"JDBC type {} ({}) not currently supported\",\n                        sqlType,\n                        typeDefine.getNativeType());\n        }\n        return builder.build();\n    }\n\n    /**\n     * Convert {@link Column} to an external system's type definition.\n     *\n     * @param column\n     * @return\n     */\n    @Override\n    public BasicTypeDefine reconvert(Column column) {\n        throw new UnsupportedOperationException(\n                String.format(\n                        \"%s (%s) type doesn't have a mapping to the SQL database column type\",\n                        column.getName(), column.getDataType().getSqlType().name()));\n    }\n}\n","sourceCodeStart":177,"sourceCodeEnd":201,"githubUrl":"https://github.com/apache/seatunnel/blob/cf67b549a7a6c35fa0beb12d83c62892427ea919/seatunnel-connectors-v2/connector-jdbc/src/main/java/org/apache/seatunnel/connectors/seatunnel/jdbc/internal/dialect/GenericTypeConverter.java#L177-L201","documentation":"GenericTypeConverter.reconvert always throws UnsupportedOperationException with a message stating that the column's type has no mapping to a SQL database column type. reconvert() translates a SeaTunnel Column back into a database type definition; GenericTypeConverter has no reverse mappings, so any code path requiring DDL type generation from SeaTunnel types fails.","triggerScenarios":"Calling reconvert() on GenericTypeConverter — typically during auto table creation / schema_save_mode=CREATE_SCHEMA_WHEN_NOT_EXIST for a database that fell back to the generic dialect — with any Column whose reverse mapping is undefined.","commonSituations":"Auto-creating tables in an unsupported database where SeaTunnel must map SeaTunnel types to SQL DDL; enabling schema save mode on a DB without a dedicated type converter; writing DDL for exotic types through the generic dialect.","solutions":["Pre-create the target table manually so SeaTunnel does not need to generate DDL (schema_save_mode = ERROR_WHEN_SCHEMA_NOT_EXIST or DESTINATION)","Use a database with a dedicated JdbcDialect/TypeConverter that supports reconvert","Upgrade SeaTunnel if a converter for your database was added later","Implement a custom TypeConverter with reconvert mappings for your database"],"exampleFix":"// before\nschema_save_mode = \"CREATE_SCHEMA_WHEN_NOT_EXIST\"  # triggers reconvert on GenericTypeConverter\n// after\nschema_save_mode = \"ERROR_WHEN_SCHEMA_NOT_EXIST\"  # create the table manually first","handlingStrategy":"fallback","validationCode":"TypeConverter<BasicTypeDefine> tc;\ntry { tc = dialect.getTypeConverter(); } catch (UnsupportedOperationException e) { tc = null; }\nif (tc == null || requiresDdlAutoCreate(tc))\n    throw new IllegalArgumentException(\"Auto DDL unsupported for this DB; create tables manually and set schema_save_mode=ERROR_WHEN_SCHEMA_NOT_EXIST\");","typeGuard":null,"tryCatchPattern":"try {\n    catalog.createTable(...); // triggers reconvert\n} catch (UnsupportedOperationException e) {\n    LOG.warn(\"Type reconvert unsupported; create table manually, then retry with DESTINATION/ERROR schema mode\");\n}","preventionTips":["Pre-create target tables and avoid auto-DDL on generic/unsupported dialects","Use databases with dedicated TypeConverter implementations for schema-creation workflows","Test schema_save_mode settings against your dialect in staging","Upgrade SeaTunnel when a converter for your database becomes available"],"tags":["jdbc","type-converter","ddl","unsupported-operation"],"backgroundTag":"method-not-implemented","analyzedSha":"cf67b549a7a6c35fa0beb12d83c62892427ea919","analyzedAt":"2026-09-10T21:44:55.265Z","contentChangedAt":"2026-09-10T21:44:55.265Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}