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97 changes: 48 additions & 49 deletions jdbc-bridge/src/main/java/sqlkit/bridge/QueryExecutor.java
Original file line number Diff line number Diff line change
Expand Up @@ -4,70 +4,69 @@
import java.util.*;

/**
* Executes SQL queries against a JDBC connection and serializes results to JSON-compatible Maps.
* Executes SQL statements against a JDBC connection and serializes results to JSON-compatible Maps.
*/
public class QueryExecutor {

/**
* Execute a SQL query and return the result as a Map.
* Execute a SQL statement and return the result as a Map.
* <p>
* For SELECT queries, returns {columns: [...], rows: [[...], ...]}.
* For UPDATE/INSERT/DELETE, returns {rows_affected: N}.
* Uses {@link Statement#execute(String)} so no keyword sniffing is needed:
* statements that return rows (SELECT, WITH ... SELECT, INSERT ... RETURNING)
* yield {columns, rows}; everything else (INSERT/UPDATE/DELETE/MERGE/DDL)
* yields {rows_affected: N}.
*/
public static Map<String, Object> execute(Connection conn, String sql) throws Exception {
sql = sql.trim();

boolean isQuery;
String upper = sql.toUpperCase().trim();
isQuery = upper.startsWith("SELECT")
|| upper.startsWith("WITH")
|| upper.startsWith("EXPLAIN")
|| upper.startsWith("SHOW")
|| upper.startsWith("DESCRIBE")
|| upper.startsWith("PRAGMA");

if (isQuery) {
return executeQuery(conn, sql);
} else {
return executeUpdate(conn, sql);
}
}
try (Statement stmt = conn.createStatement()) {
boolean isResultSet = stmt.execute(sql);

private static Map<String, Object> executeQuery(Connection conn, String sql) throws Exception {
try (Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql)) {
List<String> columns = null;
List<List<Object>> rows = null;
long rowsAffected = 0;

ResultSetMetaData meta = rs.getMetaData();
int columnCount = meta.getColumnCount();
while (true) {
if (isResultSet) {
try (ResultSet rs = stmt.getResultSet()) {
ResultSetMetaData meta = rs.getMetaData();
int columnCount = meta.getColumnCount();

List<String> columns = new ArrayList<>();
for (int i = 1; i <= columnCount; i++) {
columns.add(meta.getColumnLabel(i));
}
List<String> resultColumns = new ArrayList<>();
for (int i = 1; i <= columnCount; i++) {
resultColumns.add(meta.getColumnLabel(i));
}

List<List<Object>> rows = new ArrayList<>();
while (rs.next()) {
List<Object> row = new ArrayList<>();
for (int i = 1; i <= columnCount; i++) {
row.add(getValue(rs, i));
List<List<Object>> resultRows = new ArrayList<>();
while (rs.next()) {
List<Object> row = new ArrayList<>();
for (int i = 1; i <= columnCount; i++) {
row.add(getValue(rs, i));
}
resultRows.add(row);
}
columns = resultColumns;
rows = resultRows;
}
} else {
int count = stmt.getUpdateCount();
if (count >= 0) {
rowsAffected = count;
}
}
isResultSet = stmt.getMoreResults();
if (!isResultSet && stmt.getUpdateCount() == -1) {
break;
}
rows.add(row);
}

Map<String, Object> result = new LinkedHashMap<>();
result.put("columns", columns);
result.put("rows", rows);
return result;
}
}

private static Map<String, Object> executeUpdate(Connection conn, String sql) throws Exception {
try (Statement stmt = conn.createStatement()) {
int affected = stmt.executeUpdate(sql);
Map<String, Object> result = new LinkedHashMap<>();
result.put("rows_affected", (long) affected);
result.put("columns", Collections.emptyList());
result.put("rows", Collections.emptyList());
if (rows != null) {
result.put("columns", columns);
result.put("rows", rows);
} else {
result.put("rows_affected", rowsAffected);
result.put("columns", Collections.emptyList());
result.put("rows", Collections.emptyList());
}
return result;
}
}
Expand Down
26 changes: 13 additions & 13 deletions src-tauri/Cargo.lock

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2 changes: 1 addition & 1 deletion src-tauri/Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -98,7 +98,7 @@ zip = { version = "2", features = [ "deflate" ] }
# TOML parsing (drivers.toml)
toml = "0.8"
sha2 = "0.10"
sqlparser = "0.55"
sqlparser = "0.62"
russh = "0.60"
axum = "0.8"
portpicker = "0.1.1"
Expand Down
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