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Posted to issues@calcite.apache.org by "jin xing (Jira)" <ji...@apache.org> on 2019/08/28 12:59:00 UTC
[jira] [Commented] (CALCITE-3301) View test when it occur
java.lang.AssertionError
[ https://issues.apache.org/jira/browse/CALCITE-3301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16917752#comment-16917752 ]
jin xing commented on CALCITE-3301:
-----------------------------------
Hi [~Water Cut Off] ,
Usually we talk about such issues on the mailing list.
For your question, maybe you can refer to *ReflectiveSchemaTest#testCreateView, RelBuilderTest#testExpandViewInRelBuilder. and RelBuilderTest#expandingConfig*.
I'm not sure if there are other better references.
Regards,
Jin
> View test when it occur java.lang.AssertionError
> --------------------------------------------------
>
> Key: CALCITE-3301
> URL: https://issues.apache.org/jira/browse/CALCITE-3301
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Water Cut Off
> Priority: Major
>
> * *{color:#00875a}I want to use calcite to parse view, and convert view to my own RelNode, but I am not sure how to use ViewExpander ,can you give me an example to solve this problem, thanks ?{color}*
>
> public class PrestoView implements RelOptTable.ViewExpander {
> private final SqlValidator validator;
> private final Prepare.CatalogReader catalogReader;
> private final RelOptCluster cluster;
> private final SqlToRelConverter.Config config;
> public PrestoView(SqlValidator validator, Prepare.CatalogReader catalogReader, RelOptCluster cluster, SqlToRelConverter.Config config)
> { this.validator = validator; this.catalogReader = catalogReader; this.cluster = cluster; this.config = config; }
> @Override
> public RelRoot expandView(RelDataType rowType, String queryString, List<String> schemaPath, List<String> viewPath) {
> try
> { SqlNode parsedNode = SqlParser.create(queryString).parseStmt(); SqlNode validatedNode = validator.validate(parsedNode); SqlToRelConverter converter = new SqlToRelConverter(this, validator, catalogReader, cluster, StandardConvertletTable.INSTANCE, config); return converter.convertQuery(validatedNode, false, true); }
> catch (SqlParseException e)
> { throw new RuntimeException("Error happened while expanding view.", e); }
> }
> --------------------------------------------------------------
> public class PrestoViewTable extends AbstractTable implements TranslatableTable {
> private final String vName;
> private final String viewSql;
> public PrestoViewTable(String vName, String viewSql)
> { super(); this.vName = vName; this.viewSql = viewSql; }
> public String getVName()
> { return vName; }
> @Override
> public RelNode toRel(RelOptTable.ToRelContext context, RelOptTable relOptTable)
> { return expandView(context, relOptTable.getRowType(), viewSql).rel; }
> @Override
> public RelDataType getRowType(final RelDataTypeFactory typeFactory) {
> RelDataTypeFactory.Builder builder = typeFactory.builder();
> builder.add("empid", new BasicSqlType(new RelDataTypeSystemImpl() {
> }, SqlTypeName.INTEGER));
> builder.add("deptno", new BasicSqlType(new RelDataTypeSystemImpl() {
> }, SqlTypeName.VARCHAR));
> return builder.build();
> }
> @Override
> public Schema.TableType getJdbcTableType()
> { return Schema.TableType.VIEW; }
> private RelRoot expandView(RelOptTable.ToRelContext context, RelDataType rowType, String queryString) {
> try {
> final RelRoot root = context.expandView(rowType, queryString, null, null);
> final RelNode rel = RelOptUtil.createCastRel(root.rel, rowType, true);
> // Expand any views
> final RelNode rel2 = rel.accept(new RelShuttleImpl() {
> @Override
> public RelNode visit(TableScan scan) {
> final RelOptTable table = scan.getTable();
> final TranslatableTable translatableTable = table.unwrap(TranslatableTable.class);
> if (translatableTable != null)
> { return translatableTable.toRel(context, table); }
> return super.visit(scan);
> }
> });
> return root.withRel(rel2);
> } catch (Exception e)
> { throw new RuntimeException("Error while parsing view definition: " + queryString, e); }
> }
> }
> ---------------------------------------------------------------------------
> public static SchemaPlus registerRootSchema(List<PrestoTable> tabList, List<PrestoViewTable> viewTables) {
> SchemaPlus rootSchema = Frameworks.createRootSchema(true);
> for (PrestoTable table : tabList)
> { rootSchema.add(table.getTableName(), table); }
> List<PrestoViewTable> vts = new ArrayList<>();
> PrestoViewTable pt = new PrestoViewTable("V_EMP", "select * from emp where empid>10");
> vts.add(pt);
> //
> // for (PrestoViewTable pv : viewTables)
> { // rootSchema.add(pv.getVName(), pv); // }
> return rootSchema;
> }
>
> {color:#00875a}----------------------------*Test----*---------------------------------------------------------------------------------------------------{color}
>
> public class CalciteTest {
> public static void main(String[] args)
> { // String sql = "select * from dept "; String sql1 = "select a.* from dept a left join emp b on a.deptno=b.deptno where a.name in('compute','aab') and b.deptno='aa' order by a.deptno limit 10"; String sql2 = "select a.name from dept a left join emp b on a.deptno=b.deptno where a.name in('compute','aab') and b.deptno='aa'"; String sql3 = "select count(distinct deptno) from dept where deptno='aa'"; String sql4 = "select * from v_emp"; // sqlToRelNode(sql); sqlToRelNode(sql4); }
> private static RelNode sqlToRelNode(String sql) {
> SchemaPlus rootSchema = CalciteUtils.registerRootSchema(createTables(), createVTables());
> //expandView(rootSchema);
> final FrameworkConfig fromworkConfig = Frameworks.newConfigBuilder().parserConfig(SqlParser.Config.DEFAULT).defaultSchema(rootSchema).traitDefs(ConventionTraitDef.INSTANCE, RelDistributionTraitDef.INSTANCE).build();
> try {
> //---------------------SQL to SqlNode---------------------------------
> SqlTypeFactoryImpl factory = new SqlTypeFactoryImpl(RelDataTypeSystem.DEFAULT);
> // sql parser
> SqlParser parser = SqlParser.create(sql, SqlParser.Config.DEFAULT);
> SqlNode parsed = parser.parseStmt();
> CalciteCatalogReader calciteCatalogReader = new CalciteCatalogReader(CalciteSchema.from(rootSchema), CalciteSchema.from(rootSchema).path(null), factory, new CalciteConnectionConfigImpl(new Properties()));
> // sql validate
> SqlValidator validator = SqlValidatorUtil.newValidator(SqlStdOperatorTable.instance(), calciteCatalogReader, factory, CalciteUtils.conformance(fromworkConfig));
> SqlNode validated = validator.validate(parsed);
> //---------------------Planner---------------------------------
> VolcanoPlanner planner = new PrestoVolcanoPlanner();
> planner.addRelTraitDef(ConventionTraitDef.INSTANCE);
> planner.addRelTraitDef(RelDistributionTraitDef.INSTANCE);
> final RelOptCluster relOptCluster = RelOptCluster.create(planner, new RexBuilder(new SqlTypeFactoryImpl(RelDataTypeSystem.DEFAULT)));
> //add RelMetadataProvider
> relOptCluster.setMetadataProvider(PrestoRelMetaDataProvider.INSTANCE);
> // SqlNode toRelNode
> final SqlToRelConverter.Config config = SqlToRelConverter.configBuilder().withConfig(fromworkConfig.getSqlToRelConverterConfig()).withTrimUnusedFields(false).withExpand(true).withConvertTableAccess(false).build();
> final SqlToRelConverter sqlToRelConverter = new SqlToRelConverter(new PrestoView(validator, calciteCatalogReader, relOptCluster, config), validator, calciteCatalogReader, relOptCluster, fromworkConfig.getConvertletTable(), config);
> RelRoot root = sqlToRelConverter.convertQuery(validated, false, true);
> root = root.withRel(sqlToRelConverter.flattenTypes(root.rel, true));
> RelNode relNode = root.rel;
> HepProgramBuilder builder = HepProgram.builder().addRuleInstance(FilterJoinRule.FilterIntoJoinRule.FILTER_ON_JOIN).addRuleInstance(FilterProjectTransposeRule.INSTANCE).addRuleInstance(FilterJoinRule.FILTER_ON_JOIN).addRuleInstance(ProjectMergeRule.INSTANCE).addRuleInstance(SemiJoinRule.PROJECT);
> HepPlanner hepPlanner = new HepPlanner(builder.build());
> hepPlanner.setRoot(relNode);
> relNode = hepPlanner.findBestExp();
> RelTraitSet desiredTraits = relOptCluster.traitSetOf(PrestoRel.CONVENTION);
> if (!relNode.getTraitSet().equals(desiredTraits))
> { relNode = planner.changeTraits(relNode, desiredTraits); }
> planner.setRoot(relNode);
> relNode = planner.findBestExp();
> System.out.println("-----------------------------------------------------------");
> System.out.println("The Best relational expression string:");
> System.out.println(RelOptUtil.toString(relNode, SqlExplainLevel.ALL_ATTRIBUTES));
> System.out.println("-----------------------------------------------------------");
> RelOptCost cost = planner.getCost(relNode, PrestoRelMetadataQuery.INSTANCE);
> System.out.println(cost.toString());
> System.out.println("-----------------------------------------------------------");
> } catch (Exception e)
> { e.printStackTrace(); }
> return null;
> }
> private static List<PrestoTable> createTables()
> { List<PrestoTable> tabList = new ArrayList<>(); String[] fields = new String[]\\{"DEPTNO", "NAME", "LEADER"}
> ;
> String[] fieldTypes = new String[]\{"int", "string", "string"};
> List<ColStatistics> cols = new ArrayList<>();
> cols.add(new ColStatistics("DEPTNO", 5));
> cols.add(new ColStatistics("NAME", 5));
> cols.add(new ColStatistics("LEADER", 5));
> PrestoTableInfo info1 = new PrestoTableInfo();
> info1.setFields(fields);
> info1.setFieldTypes(fieldTypes);
> info1.setRowCount(5d);
> info1.setTableName("DEPT");
> info1.setStatistics(cols);
> PrestoTable t1 = new PrestoTable(info1);
> String[] fields2 = new String[]\{"EMPID", "NAME", "DEPTNO", "SALARY"};
> String[] fieldTypes2 = new String[]\{"int", "string", "int", "double"};
> List<ColStatistics> cols2 = new ArrayList<>();
> cols2.add(new ColStatistics("EMPID", 50));
> cols2.add(new ColStatistics("NAME", 50));
> cols2.add(new ColStatistics("DEPTNO", 5));
> cols2.add(new ColStatistics("SALARY", 5));
> PrestoTableInfo info2 = new PrestoTableInfo();
> info2.setFields(fields2);
> info2.setFieldTypes(fieldTypes2);
> info2.setRowCount(50d);
> info2.setTableName("EMP");
> info2.setStatistics(cols2);
> PrestoTable t2 = new PrestoTable(info2);
> tabList.add(t1);
> tabList.add(t2);
> return tabList;
> }
> ===============================================
> *{color:#ff0000}ERROR:{color}*
> Exception in thread "main" java.lang.AssertionErrorException in thread "main" java.lang.AssertionError at org.apache.calcite.util.Pair.zip(Pair.java:202) at org.apache.calcite.rex.RexUtil.generateCastExpressions(RexUtil.java:134) at org.apache.calcite.rex.RexUtil.generateCastExpressions(RexUtil.java:116) at org.apache.calcite.plan.RelOptUtil.createCastRel(RelOptUtil.java:749) at org.apache.calcite.plan.RelOptUtil.createCastRel(RelOptUtil.java:722) at com.niwodai.pangu.datasearch.calcite.PrestoViewTable.expandView(PrestoViewTable.java:64) at com.niwodai.pangu.datasearch.calcite.PrestoViewTable.toRel(PrestoViewTable.java:42) at org.apache.calcite.prepare.RelOptTableImpl.toRel(RelOptTableImpl.java:269) at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewriteRel(RelStructuredTypeFlattener.java:694) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.calcite.util.ReflectUtil.invokeVisitorInternal(ReflectUtil.java:257) at org.apache.calcite.util.ReflectUtil.invokeVisitor(ReflectUtil.java:214) at org.apache.calcite.util.ReflectUtil$1.invokeVisitor(ReflectUtil.java:464) at org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRelVisitor.visit(RelStructuredTypeFlattener.java:768) at org.apache.calcite.rel.SingleRel.childrenAccept(SingleRel.java:72) at org.apache.calcite.rel.RelVisitor.visit(RelVisitor.java:44) at org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRelVisitor.visit(RelStructuredTypeFlattener.java:763) at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewrite(RelStructuredTypeFlattener.java:195) at org.apache.calcite.sql2rel.SqlToRelConverter.flattenTypes(SqlToRelConverter.java:468) at com.niwodai.pangu.datasearch.calcite.CalciteTest.sqlToRelNode(CalciteTest.java:97) at com.niwodai.pangu.datasearch.calcite.CalciteTest.main(CalciteTest.java:59)
>
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