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[feature](nereids)support show view command in nereids (#44698)
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151 changes: 151 additions & 0 deletions
151
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/ShowViewCommand.java
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| // Licensed to the Apache Software Foundation (ASF) under one | ||
| // or more contributor license agreements. See the NOTICE file | ||
| // distributed with this work for additional information | ||
| // regarding copyright ownership. The ASF licenses this file | ||
| // to you under the Apache License, Version 2.0 (the | ||
| // "License"); you may not use this file except in compliance | ||
| // with the License. You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, | ||
| // software distributed under the License is distributed on an | ||
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| // KIND, either express or implied. See the License for the | ||
| // specific language governing permissions and limitations | ||
| // under the License. | ||
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| package org.apache.doris.nereids.trees.plans.commands; | ||
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| import org.apache.doris.catalog.Column; | ||
| import org.apache.doris.catalog.Database; | ||
| import org.apache.doris.catalog.Env; | ||
| import org.apache.doris.catalog.ScalarType; | ||
| import org.apache.doris.catalog.Table; | ||
| import org.apache.doris.catalog.View; | ||
| import org.apache.doris.common.ErrorCode; | ||
| import org.apache.doris.common.ErrorReport; | ||
| import org.apache.doris.common.util.Util; | ||
| import org.apache.doris.mysql.privilege.PrivPredicate; | ||
| import org.apache.doris.nereids.NereidsPlanner; | ||
| import org.apache.doris.nereids.StatementContext; | ||
| import org.apache.doris.nereids.parser.NereidsParser; | ||
| import org.apache.doris.nereids.properties.PhysicalProperties; | ||
| import org.apache.doris.nereids.trees.plans.PlanType; | ||
| import org.apache.doris.nereids.trees.plans.commands.info.TableNameInfo; | ||
| import org.apache.doris.nereids.trees.plans.logical.LogicalPlan; | ||
| import org.apache.doris.nereids.trees.plans.visitor.PlanVisitor; | ||
| import org.apache.doris.nereids.util.PlanUtils; | ||
| import org.apache.doris.qe.ConnectContext; | ||
| import org.apache.doris.qe.OriginStatement; | ||
| import org.apache.doris.qe.ShowResultSet; | ||
| import org.apache.doris.qe.ShowResultSetMetaData; | ||
| import org.apache.doris.qe.StmtExecutor; | ||
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| import com.google.common.base.Strings; | ||
| import com.google.common.collect.Lists; | ||
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| import java.util.List; | ||
| import java.util.stream.Collectors; | ||
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| /** | ||
| * ShowViewCommand | ||
| */ | ||
| public class ShowViewCommand extends Command implements NoForward { | ||
| private static final ShowResultSetMetaData META_DATA = ShowResultSetMetaData.builder() | ||
| .addColumn(new Column("View", ScalarType.createVarchar(30))) | ||
| .addColumn(new Column("Create View", ScalarType.createVarchar(65535))) | ||
| .build(); | ||
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| private final String db; | ||
| private final TableNameInfo tbl; | ||
| private List<View> matchViews = Lists.newArrayList(); | ||
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| public ShowViewCommand(String db, TableNameInfo tbl) { | ||
| super(PlanType.SHOW_VIEW_COMMAND); | ||
| this.db = db; | ||
| this.tbl = tbl; | ||
| } | ||
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| @Override | ||
| public <R, C> R accept(PlanVisitor<R, C> visitor, C context) { | ||
| return visitor.visitShowViewCommand(this, context); | ||
| } | ||
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| private void validate(ConnectContext ctx) throws Exception { | ||
| if (!Strings.isNullOrEmpty(db)) { | ||
| // if user specify the `from db`, overwrite the db in `tbl` with this db. | ||
| // for example: | ||
| // show view from db1.tbl1 from db2; | ||
| // will be rewrote to: | ||
| // show view from db2.tbl1; | ||
| // this act same as in MySQL | ||
| tbl.setDb(db); | ||
| } | ||
| tbl.analyze(ctx); | ||
| // disallow external catalog | ||
| Util.prohibitExternalCatalog(tbl.getCtl(), this.getClass().getSimpleName()); | ||
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| String dbName = tbl.getDb(); | ||
| if (!Env.getCurrentEnv().getAccessManager().checkTblPriv( | ||
| ConnectContext.get(), tbl.getCtl(), dbName, tbl.getTbl(), PrivPredicate.SHOW)) { | ||
| ErrorReport.reportAnalysisException(ErrorCode.ERR_TABLEACCESS_DENIED_ERROR, "SHOW VIEW", | ||
| ConnectContext.get().getQualifiedUser(), | ||
| ConnectContext.get().getRemoteIP(), | ||
| dbName + ": " + tbl.getTbl()); | ||
| } | ||
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| Database database = Env.getCurrentInternalCatalog().getDbOrAnalysisException(dbName); | ||
| database.getOlapTableOrAnalysisException(tbl.getTbl()); | ||
| for (Table table : database.getViewsOnIdOrder()) { | ||
| View view = (View) table; | ||
| // get table refs instead of get tables because it don't need to check table's validity | ||
| List<TableNameInfo> tableNameInfos = getTableNames(ctx, view.getInlineViewDef()); | ||
| for (TableNameInfo tableNameInfo : tableNameInfos) { | ||
| tableNameInfo.analyze(ctx); | ||
| if (tableNameInfo.equals(tbl)) { | ||
| matchViews.add(view); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| private List<TableNameInfo> getTableNames(ConnectContext ctx, String sql) { | ||
| LogicalPlan unboundMvPlan = new NereidsParser().parseSingle(sql); | ||
| StatementContext statementContext = new StatementContext(ctx, | ||
| new OriginStatement(sql, 0)); | ||
| NereidsPlanner planner = new NereidsPlanner(statementContext); | ||
| if (ctx.getStatementContext() == null) { | ||
| ctx.setStatementContext(statementContext); | ||
| } | ||
| planner.planWithLock(unboundMvPlan, PhysicalProperties.ANY, ExplainCommand.ExplainLevel.ANALYZED_PLAN); | ||
| LogicalPlan logicalPlan = (LogicalPlan) planner.getCascadesContext().getRewritePlan(); | ||
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| return PlanUtils.getLogicalScanFromRootPlan(logicalPlan).stream() | ||
| .map(plan -> new TableNameInfo(plan.getTable().getFullQualifiers())).collect(Collectors.toList()); | ||
| } | ||
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| @Override | ||
| public void run(ConnectContext ctx, StmtExecutor executor) throws Exception { | ||
| validate(ctx); | ||
| List<List<String>> rows = Lists.newArrayList(); | ||
| for (View view : matchViews) { | ||
| view.readLock(); | ||
| try { | ||
| List<String> createViewStmt = Lists.newArrayList(); | ||
| Env.getDdlStmt(view, createViewStmt, null, null, false, true /* hide password */, -1L); | ||
| if (!createViewStmt.isEmpty()) { | ||
| rows.add(Lists.newArrayList(view.getName(), createViewStmt.get(0))); | ||
| } | ||
| } finally { | ||
| view.readUnlock(); | ||
| } | ||
| } | ||
| ShowResultSet resultSet = new ShowResultSet(META_DATA, rows); | ||
| if (executor.isProxy()) { | ||
| executor.setProxyShowResultSet(resultSet); | ||
| } else { | ||
| executor.sendResultSet(resultSet); | ||
| } | ||
| } | ||
| } |
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17 changes: 17 additions & 0 deletions
17
regression-test/data/nereids_p0/show/show_view_command.out
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,17 @@ | ||
| -- This file is automatically generated. You should know what you did if you want to edit this | ||
| -- !cmd -- | ||
| ttv1 CREATE VIEW `ttv1` AS select `internal`.`test_show_view_db2`.`t1`.`c1`, `internal`.`test_show_view_db2`.`t2`.`c2` from `internal`.`test_show_view_db2`.`t1` join `internal`.`test_show_view_db2`.`t2` on `internal`.`test_show_view_db2`.`t1`.`c2` = `internal`.`test_show_view_db2`.`t2`.`c2`; | ||
| ttv2 CREATE VIEW `ttv2` AS select `internal`.`test_show_view_db2`.`t1`.`c1` from `internal`.`test_show_view_db2`.`t1` where `internal`.`test_show_view_db2`.`t1`.`c2` = 1; | ||
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| -- !cmd -- | ||
| tv1 CREATE VIEW `tv1` AS select `internal`.`test_show_view_db1`.`t1`.`c1`, `internal`.`test_show_view_db1`.`t2`.`c2` from `internal`.`test_show_view_db1`.`t1` join `internal`.`test_show_view_db1`.`t2` on `internal`.`test_show_view_db1`.`t1`.`c2` = `internal`.`test_show_view_db1`.`t2`.`c2`; | ||
| tv2 CREATE VIEW `tv2` AS select `internal`.`test_show_view_db1`.`t1`.`c1` from `internal`.`test_show_view_db1`.`t1` where `internal`.`test_show_view_db1`.`t1`.`c2` = 1; | ||
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| -- !cmd -- | ||
| ttv1 CREATE VIEW `ttv1` AS select `internal`.`test_show_view_db2`.`t1`.`c1`, `internal`.`test_show_view_db2`.`t2`.`c2` from `internal`.`test_show_view_db2`.`t1` join `internal`.`test_show_view_db2`.`t2` on `internal`.`test_show_view_db2`.`t1`.`c2` = `internal`.`test_show_view_db2`.`t2`.`c2`; | ||
| ttv2 CREATE VIEW `ttv2` AS select `internal`.`test_show_view_db2`.`t1`.`c1` from `internal`.`test_show_view_db2`.`t1` where `internal`.`test_show_view_db2`.`t1`.`c2` = 1; | ||
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| -- !cmd -- | ||
| ttv1 CREATE VIEW `ttv1` AS select `internal`.`test_show_view_db2`.`t1`.`c1`, `internal`.`test_show_view_db2`.`t2`.`c2` from `internal`.`test_show_view_db2`.`t1` join `internal`.`test_show_view_db2`.`t2` on `internal`.`test_show_view_db2`.`t1`.`c2` = `internal`.`test_show_view_db2`.`t2`.`c2`; | ||
| ttv2 CREATE VIEW `ttv2` AS select `internal`.`test_show_view_db2`.`t1`.`c1` from `internal`.`test_show_view_db2`.`t1` where `internal`.`test_show_view_db2`.`t1`.`c2` = 1; | ||
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