com.huaweicloud.dws.client.executor.MergeExecutor Maven / Gradle / Ivy

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package com.huaweicloud.dws.client.executor;

import com.huaweicloud.dws.client.DwsConfig;
import com.huaweicloud.dws.client.exception.DwsClientException;
import com.huaweicloud.dws.client.model.Record;
import com.huaweicloud.dws.client.model.TableSchema;
import com.huaweicloud.dws.client.util.JdbcUtil;
import com.huaweicloud.dws.client.util.LocalUtil;
import lombok.extern.slf4j.Slf4j;

import java.sql.Connection;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @ProjectName: dws-connector
 * @ClassName: MergeExecutor
 * @Description: merge执行器
 * @Date: 2023/1/17 17:00
 * @Version: 1.0
 */
@Slf4j
public class MergeExecutor {
    public void execute(List records, Connection connection, DwsConfig config, String table, String fromTable) throws DwsClientException {
        long start = System.currentTimeMillis();
        Record first = records.get(0);
        TableSchema schema = first.getTableSchema();
        List keys = schema.getPrimaryKeyNames();
        List insertColumns = schema.getColumnNames().stream().filter(first::isSet).collect(Collectors.toList());
        // 更新时去除主键字段 还有用户忽略的字段
        boolean isUpdateAll = "upsert from ".equals(getType()) && LocalUtil.getTableConfig().isUpdateAll();
        List updateColumns = insertColumns.stream().filter(key -> !(schema.isPrimaryKey(key) && !isUpdateAll) && !first.isIgnoreUpdate(key)).collect(Collectors.toList());
        String mergeIntoSql = getExecuteSql(config, table, fromTable, keys, insertColumns, updateColumns);
        try {
            if (config.getTableConfig(schema.getTableName()).isEnableHstoreUpsertAutocommit()) {
                JdbcUtil.executeSql(connection, "set enable_hstore_upsert_autocommit=on;");
            }
            try {
                connection.prepareStatement(mergeIntoSql).execute();
            } finally {
                if (config.getTableConfig(schema.getTableName()).isEnableHstoreUpsertAutocommit()) {
                    JdbcUtil.executeSql(connection, "set enable_hstore_upsert_autocommit=off;");
                }
            }
            log.info("{} successful. table = {}, use time = {}, data size = {}", getType(),
                    schema.getTableName().getFullName(), System.currentTimeMillis() - start, records.size());
        } catch (Exception e) {
            log.error("{} fail. sql = {}", getType(), mergeIntoSql, e);
            throw DwsClientException.fromException(e);
        }

    }

    protected String getExecuteSql(DwsConfig config, String table, String fromTable, List keys, List insertColumns, List updateColumns) {
        return JdbcUtil.getMergeIntoSql(table, fromTable, keys, updateColumns, insertColumns, config.getConflictStrategy());
    }

    protected String getType() {
        return "merge";
    }
}