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Merge pull request #1241 from openai0229/sqlite-database-export

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Sqlite database export
This commit is contained in:
ji
2024-03-22 11:16:31 +08:00
committed by GitHub
parent b659b69bcb c85616c455
commit 7a05bd0d4a
2 changed files with 106 additions and 3 deletions
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103
chat2db-server/chat2db-plugins/chat2db-sqlite/src/main/java/ai/chat2db/plugin/sqlite/SqliteDBManage.java
View File

@ -3,5 +3,108 @@ package ai.chat2db.plugin.sqlite;
import ai.chat2db.spi.DBManage;
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 exportDatabase(Connection connection, String databaseName, String schemaName, boolean containData) throws SQLException {
StringBuilder sqlBuilder = new StringBuilder();
exportTables(connection, databaseName, 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 {
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);
}
}
}
private void exportTable(Connection connection, 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);
}
}
}
}
private String format(String tableName) {
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()) {
exportView(connection, resultSet.getString("TABLE_NAME"), sqlBuilder);
}
}
}
private void exportView(Connection connection, String viewName, StringBuilder sqlBuilder) throws SQLException {
String sql = String.format("SELECT * FROM sqlite_master WHERE type = 'view' and name='%s';", viewName);
try (ResultSet resultSet = connection.createStatement().executeQuery(sql)) {
if (resultSet.next()) {
sqlBuilder.append("DROP VIEW IF EXISTS ").append(format(viewName)).append(";").append("\n")
.append(resultSet.getString("sql")).append(";").append("\n");
}
}
}
private void exportTriggers(Connection connection, StringBuilder sqlBuilder) throws SQLException {
String sql = "SELECT * FROM sqlite_master WHERE type = 'trigger';";
try (ResultSet resultSet = connection.createStatement().executeQuery(sql)) {
while (resultSet.next()) {
String triggerName = resultSet.getString("name");
exportTrigger(connection, triggerName, sqlBuilder);
}
}
}
private void exportTrigger(Connection connection, String triggerName, StringBuilder sqlBuilder) throws SQLException {
String sql = String.format("SELECT * FROM sqlite_master WHERE type = 'trigger' and name='%s';", triggerName);
try (ResultSet resultSet = connection.createStatement().executeQuery(sql)) {
if (resultSet.next()) {
sqlBuilder.append(resultSet.getString("sql")).append("\n");
}
}
}
}

6
chat2db-server/chat2db-plugins/chat2db-sqlite/src/main/java/ai/chat2db/plugin/sqlite/SqliteMetaData.java
View File

@ -21,7 +21,7 @@ import java.util.List;
import java.util.stream.Collectors;
public class SqliteMetaData extends DefaultMetaService implements MetaData {
public static String VIEW_DDL_SQL="SELECT * FROM sqlite_master WHERE type = 'view' and name='%s';";
private static String VIEW_DDL_SQL="SELECT * FROM sqlite_master WHERE type = 'view' and name='%s';";
@Override
public Table view(Connection connection, String databaseName, String schemaName, String viewName) {
Table view = new Table();
@ -35,8 +35,8 @@ public class SqliteMetaData extends DefaultMetaService implements MetaData {
return view;
}
public static final String TRIGGER_LIST_SQL = "SELECT * FROM sqlite_master WHERE type = 'trigger';";
public static String TRIGGER_DDL_SQL = "SELECT * FROM sqlite_master WHERE type = 'trigger' and name='%s';";
private static final String TRIGGER_LIST_SQL = "SELECT * FROM sqlite_master WHERE type = 'trigger';";
private static String TRIGGER_DDL_SQL = "SELECT * FROM sqlite_master WHERE type = 'trigger' and name='%s';";
@Override
public List<Trigger> triggers(Connection connection, String databaseName, String schemaName) {