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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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42
chat2db-server/chat2db-plugins/chat2db-sqlite/src/main/java/ai/chat2db/plugin/sqlite/SqliteDBManage.java
View File

@ -5,44 +5,36 @@ import ai.chat2db.spi.jdbc.DefaultDBManage;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Objects;
public class SqliteDBManage 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();
exportTables(connection, databaseName, sqlBuilder, containData);
exportTables(connection, databaseName, schemaName,sqlBuilder, containData);
exportViews(connection, databaseName, sqlBuilder);
exportTriggers(connection, sqlBuilder);
return sqlBuilder.toString();
}
private void exportTables(Connection connection, String databaseName, StringBuilder sqlBuilder, boolean containData) throws SQLException {
private void exportTables(Connection connection, String databaseName, String schemaName, StringBuilder sqlBuilder, boolean containData) throws SQLException {
try (ResultSet resultSet = connection.getMetaData().getTables(databaseName, null, null, new String[]{"TABLE", "SYSTEM TABLE"})) {
while (resultSet.next()) {
exportTable(connection, resultSet.getString("TABLE_NAME"), sqlBuilder, containData);
exportTable(connection,schemaName, resultSet.getString("TABLE_NAME"), sqlBuilder, containData);
}
}
}
private void exportTable(Connection connection, String tableName, StringBuilder sqlBuilder, boolean containData) throws SQLException {
private void exportTable(Connection connection, String schemaName, String tableName, StringBuilder sqlBuilder, boolean containData) throws SQLException {
String sql = String.format("SELECT sql FROM sqlite_master WHERE type='table' AND name='%s'", tableName);
try (ResultSet resultSet = connection.createStatement().executeQuery(sql)) {
if (resultSet.next()) {
sqlBuilder.append("DROP TABLE IF EXISTS ").append(format(tableName)).append(";").append("\n")
.append(resultSet.getString("sql")).append(";").append("\n");
if (containData) {
exportTableData(connection, tableName, sqlBuilder);
exportTableData(connection,schemaName, tableName, sqlBuilder);
}
}
}
@ -52,30 +44,6 @@ public class SqliteDBManage extends DefaultDBManage implements DBManage {
return "\""+tableName+"\"";
}
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"})) {
while (resultSet.next()) {