ReorderColumnsOp.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
//
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package org.apache.doris.nereids.trees.plans.commands.info;

import org.apache.doris.alter.AlterOpType;
import org.apache.doris.analysis.AlterTableClause;
import org.apache.doris.analysis.ReorderColumnsClause;
import org.apache.doris.catalog.Column;
import org.apache.doris.catalog.Env;
import org.apache.doris.catalog.OlapTable;
import org.apache.doris.catalog.Table;
import org.apache.doris.common.AnalysisException;
import org.apache.doris.common.UserException;
import org.apache.doris.qe.ConnectContext;

import com.google.common.base.Strings;

import java.util.List;
import java.util.Map;

/**
 * ReorderColumnsOp
 */
public class ReorderColumnsOp extends AlterTableOp {
    private List<String> columnsByPos;
    private String rollupName;
    private Map<String, String> properties;

    public ReorderColumnsOp(List<String> cols, String rollup, Map<String, String> properties) {
        super(AlterOpType.SCHEMA_CHANGE);
        this.columnsByPos = cols;
        this.rollupName = rollup;
        this.properties = properties;
    }

    public List<String> getColumnsByPos() {
        return columnsByPos;
    }

    public String getRollupName() {
        return rollupName;
    }

    @Override
    public void validate(ConnectContext ctx) throws UserException {
        if (columnsByPos == null || columnsByPos.isEmpty()) {
            throw new AnalysisException("No column in reorder columns clause.");
        }

        Table table = Env.getCurrentInternalCatalog().getDbOrDdlException(tableName.getDb())
                .getTableOrDdlException(tableName.getTbl());
        if (table instanceof OlapTable) {
            OlapTable olapTable = (OlapTable) table;
            boolean seeValueColumn = false;
            for (String col : columnsByPos) {
                if (Strings.isNullOrEmpty(col)) {
                    throw new AnalysisException("Empty column in reorder columns.");
                }
                Column column = olapTable.getColumn(col);
                if (column != null) {
                    if (seeValueColumn && column.isKey()) {
                        throw new AnalysisException(String.format("Cannot add key column %s after value column", col));
                    }
                    seeValueColumn = seeValueColumn || !column.isKey();
                } else {
                    // throw new AnalysisException(
                    //         String.format("no column %s exists in table %s", col, tableName.getTbl()));
                }
            }
        }
    }

    @Override
    public AlterTableClause translateToLegacyAlterClause() {
        return new ReorderColumnsClause(columnsByPos, rollupName, properties);
    }

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

    @Override
    public boolean allowOpMTMV() {
        return false;
    }

    @Override
    public boolean needChangeMTMVState() {
        return false;
    }

    @Override
    public String toSql() {
        StringBuilder sb = new StringBuilder();
        sb.append("ORDER BY ");
        int idx = 0;
        for (String col : columnsByPos) {
            if (idx != 0) {
                sb.append(", ");
            }
            sb.append("`").append(col).append('`');
            idx++;
        }
        if (rollupName != null) {
            sb.append(" IN `").append(rollupName).append("`");
        }
        return sb.toString();
    }

    @Override
    public String toString() {
        return toSql();
    }
}