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remove redundant code and optimize exception throwing

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This commit is contained in:
zgq
2024-03-28 14:49:40 +08:00
parent f425604b15
commit af467eb5fc
9 changed files with 54 additions and 228 deletions
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30
chat2db-server/chat2db-plugins/chat2db-mysql/src/main/java/ai/chat2db/plugin/mysql/MysqlDBManage.java
View File

@ -10,12 +10,6 @@ import java.sql.*;
import java.util.Objects;
public class MysqlDBManage extends DefaultDBManage implements DBManage {
@Override
public String exportDatabaseData(Connection connection, String databaseName, String schemaName, String tableName) throws SQLException {
StringBuilder sqlBuilder = new StringBuilder();
exportTableData(connection, tableName, sqlBuilder);
return sqlBuilder.toString();
}
@Override
public String exportDatabase(Connection connection, String databaseName, String schemaName, boolean containData) throws SQLException {
StringBuilder sqlBuilder = new StringBuilder();
@ -62,34 +56,12 @@ public class MysqlDBManage extends DefaultDBManage implements DBManage {
sqlBuilder.append("DROP TABLE IF EXISTS ").append(format(tableName)).append(";").append("\n")
.append(resultSet.getString("Create Table")).append(";").append("\n");
if (containData) {
exportTableData(connection, tableName, sqlBuilder);
exportTableData(connection, null,tableName, sqlBuilder);
}
}
}
}
private void exportTableData(Connection connection, String tableName, StringBuilder sqlBuilder) throws SQLException {
String sql = String.format("select * from %s", tableName);
try (ResultSet resultSet = connection.createStatement().executeQuery(sql)) {
ResultSetMetaData metaData = resultSet.getMetaData();
while (resultSet.next()) {
sqlBuilder.append("INSERT INTO ").append(tableName).append(" VALUES (");
for (int i = 1; i <= metaData.getColumnCount(); i++) {
String value = resultSet.getString(i);
if (Objects.isNull(value)) {
sqlBuilder.append("NULL");
} else {
sqlBuilder.append("'").append(value).append("'");
}
if (i < metaData.getColumnCount()) {
sqlBuilder.append(", ");
}
}
sqlBuilder.append(");\n");
}
sqlBuilder.append("\n");
}
}
private void exportViews(Connection connection, String databaseName, StringBuilder sqlBuilder) throws SQLException {
try (ResultSet resultSet = connection.getMetaData().getTables(databaseName, null, null, new String[]{"VIEW"})) {