fe/fe-core/src/main/java/org/apache/doris/analysis/CreateIndexClause.java

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// 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,
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// specific language governing permissions and limitations
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package org.apache.doris.analysis;

import org.apache.doris.alter.AlterOpType;
import org.apache.doris.catalog.Env;
import org.apache.doris.catalog.Index;
import org.apache.doris.common.AnalysisException;

import com.google.common.collect.Maps;

import java.util.Map;

public class CreateIndexClause extends AlterTableClause {
    // in which table the index on, only used when alter = false
    private TableName tableName;
    // index definition class
    private IndexDef indexDef;
    // when alter = true, clause like: alter table add index xxxx
    // when alter = false, clause like: create index xx on table xxxx
    private boolean alter;
    // index internal class
    private Index index;

    public CreateIndexClause(TableName tableName, IndexDef indexDef, boolean alter) {
        super(AlterOpType.SCHEMA_CHANGE);
        this.tableName = tableName;
        this.indexDef = indexDef;
        this.alter = alter;
    }

    @Override
    public Map<String, String> getProperties() {
        return Maps.newHashMap();
    }

    public Index getIndex() {
        return index;
    }

    public IndexDef getIndexDef() {
        return indexDef;
    }

    public boolean isAlter() {
        return alter;
    }

    public TableName getTableName() {
        return tableName;
    }

    @Override
    public void analyze(Analyzer analyzer) throws AnalysisException {
        if (indexDef == null) {
            throw new AnalysisException("index definition expected.");
        }
        indexDef.analyze();
        this.index = new Index(Env.getCurrentEnv().getNextId(), indexDef.getIndexName(),
                indexDef.getColumns(), indexDef.getIndexType(),
                indexDef.getProperties(), indexDef.getComment());
    }

    @Override
    public String toSql() {
        if (alter) {
            return indexDef.toSql();
        } else {
            return "CREATE " + indexDef.toSql(tableName.toSql());
        }
    }
}