{"record":{"id":"b6dceeb4ccb935b5","repo":"apache/beam","slug":"unable-to-parse-statement","errorCode":null,"errorMessage":"Unable to parse statement","messagePattern":"Unable to parse statement","errorType":"exception","errorClass":"ParseException","httpStatus":null,"severity":"error","filePath":"sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/BeamSqlEnv.java","lineNumber":152,"sourceCode":"  }\n\n  /**\n   * Registers a custom {@link SqlOperator} into the current session's operator table. This allows\n   * registering functions with non-fixed operand types (e.g. VARIADIC), which the schema-function\n   * auto-wrapping mechanism cannot express.\n   *\n   * <p>Only safe to call before the first SQL query is planned in this environment (otherwise the\n   * parser/validator operator table may have already been built without it).\n   */\n  public void registerSqlOperator(SqlOperator operator) {\n    connection.getExtraOperatorTable().add(operator);\n  }\n\n  public String explain(String sqlString) throws ParseException {\n    try {\n      return RelOptUtil.toString(planner.convertToBeamRel(sqlString, QueryParameters.ofNone()));\n    } catch (Exception e) {\n      throw new ParseException(\"Unable to parse statement\", e);\n    }\n  }\n\n  /** BeamSqlEnv's Builder. */\n  public static class BeamSqlEnvBuilder {\n    private static final String CALCITE_PLANNER =\n        \"org.apache.beam.sdk.extensions.sql.impl.CalciteQueryPlanner\";\n    private String queryPlannerClassName;\n    private CatalogManager catalogManager;\n    private @Nullable String currentSchemaName = null;\n    private Map<String, TableProvider> schemaMap;\n    private Set<Map.Entry<String, Function>> functionSet;\n    private boolean autoLoadUdfs;\n    private @Nullable PipelineOptions pipelineOptions;\n    private Collection<RuleSet> ruleSets;\n\n    private BeamSqlEnvBuilder(TableProvider tableProvider) {\n      if (tableProvider instanceof MetaStore) {","sourceCodeStart":134,"sourceCodeEnd":170,"githubUrl":"https://github.com/apache/beam/blob/12126d8942aaf848030c478b4c6a28c6af861c66/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/BeamSqlEnv.java#L134-L170","documentation":"BeamSqlEnv.explain converts a SQL string to a Beam relational plan for EXPLAIN output. Any failure anywhere in planning/parsing/validation (not just syntax) is wrapped as a ParseException with the fixed message 'Unable to parse statement' and the original cause attached.","triggerScenarios":"Calling BeamSqlEnv.explain(sql) where the SQL has syntax errors, references unknown tables/schemas, or fails any Calcite validation/optimization step.","commonSituations":"Typos in SQL, missing registered schema/table for the query, functions not found, malformed table provider config — all surface under this single message.","solutions":["Read the attached cause (e.getCause()) to see the real parse/validate error","Validate the SQL runs via parseQuery/executeQuery or the JDBC driver first","Register all schemas/tables referenced by the query before explaining","Fix SQL syntax per Calcite dialect (double quotes for identifiers, etc.)"],"exampleFix":"// before\nenv.explain(\"SELEC * FROM t\");\n// after\nenv.explain(\"SELECT * FROM t\");","handlingStrategy":"try-catch","validationCode":"// validate SQL by parsing first\nenv.parseQuery(sqlString);","typeGuard":null,"tryCatchPattern":"try { return env.explain(sql); } catch (ParseException e) { log.error(\"Plan failed for '{}'\", sql, e.getCause()); throw e; }","preventionTips":["Always inspect the cause, not the message","Register schemas before explaining","Test SQL via JDBC before explaining"],"tags":["sql","parsing","jdbc"],"backgroundTag":"sql-query-failed","analyzedSha":"12126d8942aaf848030c478b4c6a28c6af861c66","analyzedAt":"2026-09-13T01:50:10.254Z","contentChangedAt":"2026-09-13T01:50:10.254Z","schemaVersion":2},"datasetVersion":"2026-09-14T16:17:12.679Z"}