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added information_schema.schemata listing all available table schemas
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58 changes: 58 additions & 0 deletions
58
sql/src/main/java/io/crate/metadata/information/InformationSchemataTableInfo.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| * Licensed to CRATE Technology GmbH ("Crate") under one or more contributor | ||
| * license agreements. See the NOTICE file distributed with this work for | ||
| * additional information regarding copyright ownership. Crate 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. | ||
| * | ||
| * However, if you have executed another commercial license agreement | ||
| * with Crate these terms will supersede the license and you may use the | ||
| * software solely pursuant to the terms of the relevant commercial agreement. | ||
| */ | ||
|
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| package io.crate.metadata.information; | ||
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| import com.google.common.collect.ImmutableList; | ||
| import com.google.common.collect.ImmutableMap; | ||
| import io.crate.metadata.ColumnIdent; | ||
| import io.crate.metadata.ReferenceIdent; | ||
| import io.crate.metadata.ReferenceInfo; | ||
| import io.crate.metadata.TableIdent; | ||
| import io.crate.planner.RowGranularity; | ||
| import io.crate.types.DataType; | ||
| import io.crate.types.DataTypes; | ||
|
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| public class InformationSchemataTableInfo extends InformationTableInfo { | ||
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| public static final String NAME = "schemata"; | ||
| public static final TableIdent IDENT = new TableIdent(InformationSchemaInfo.NAME, NAME); | ||
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| public static class Columns { | ||
| public static final ColumnIdent SCHEMA_NAME = new ColumnIdent("schema_name"); | ||
| } | ||
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| public static class ReferenceInfos { | ||
| public static final ReferenceInfo SCHEMA_NAME = info(Columns.SCHEMA_NAME, DataTypes.STRING); | ||
| } | ||
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| private static ReferenceInfo info(ColumnIdent columnIdent, DataType dataType) { | ||
| return new ReferenceInfo(new ReferenceIdent(IDENT, columnIdent), RowGranularity.DOC, dataType); | ||
| } | ||
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| protected InformationSchemataTableInfo(InformationSchemaInfo schemaInfo) { | ||
| super(schemaInfo, IDENT, | ||
| ImmutableList.of(Columns.SCHEMA_NAME), | ||
| ImmutableMap.of(Columns.SCHEMA_NAME, ReferenceInfos.SCHEMA_NAME), | ||
| ImmutableList.of(ReferenceInfos.SCHEMA_NAME) | ||
| ); | ||
| } | ||
| } |
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49 changes: 49 additions & 0 deletions
49
...src/main/java/io/crate/operation/reference/information/InformationSchemataExpression.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| /* | ||
| * Licensed to CRATE Technology GmbH ("Crate") under one or more contributor | ||
| * license agreements. See the NOTICE file distributed with this work for | ||
| * additional information regarding copyright ownership. Crate 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. | ||
| * | ||
| * However, if you have executed another commercial license agreement | ||
| * with Crate these terms will supersede the license and you may use the | ||
| * software solely pursuant to the terms of the relevant commercial agreement. | ||
| */ | ||
|
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| package io.crate.operation.reference.information; | ||
|
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| import io.crate.metadata.ReferenceInfo; | ||
| import io.crate.metadata.information.InformationSchemataTableInfo; | ||
| import io.crate.metadata.information.RowCollectExpression; | ||
| import io.crate.metadata.table.SchemaInfo; | ||
| import org.apache.lucene.util.BytesRef; | ||
|
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| public abstract class InformationSchemataExpression<T> extends RowCollectExpression<SchemaInfo, T> { | ||
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| public static final SchemataSchemaNameExpression SCHEMA_NAME_EXPRESSION = new SchemataSchemaNameExpression(); | ||
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| protected InformationSchemataExpression(ReferenceInfo info) { | ||
| super(info); | ||
| } | ||
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| private static class SchemataSchemaNameExpression extends InformationSchemataExpression<BytesRef> { | ||
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| protected SchemataSchemaNameExpression() { | ||
| super(InformationSchemataTableInfo.ReferenceInfos.SCHEMA_NAME); | ||
| } | ||
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| @Override | ||
| public BytesRef value() { | ||
| return new BytesRef(this.row.name()); | ||
| } | ||
| } | ||
| } |
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