feat: enhance DBeaver support for GaussDB catalogs

- Updated clone-build-deps.sh to include a new patch script for GaussDB database catalog support.
- Added patch-dbeaver-gaussdb-catalogs.sh to modify GenericDataSource.java for listing all databases in GaussDB using pg_database.

Author: BugsGuru

deploy/scripts/clone-build-deps.sh

@@ -22,8 +22,9 @@ echo "DBeaver branch: $DBEAVER_BRANCH"
 
 chmod a+x $SCRIPT_DIR/*sh
 
-# 对 dbeaver 打达梦、GaussDB 驱动补丁
+# 对 dbeaver 打达梦、GaussDB 驱动补丁及 GaussDB 数据库列表补丁
 "$SCRIPT_DIR/patch-dbeaver-dameng.sh" "$(pwd)/dbeaver"
 "$SCRIPT_DIR/patch-dbeaver-gaussdb.sh" "$(pwd)/dbeaver"
+"$SCRIPT_DIR/patch-dbeaver-gaussdb-catalogs.sh" "$(pwd)/dbeaver"
 
 echo "Clone and patch done. You can run build from cloudbeaver/deploy (e.g. ./build-backend.sh)."

deploy/scripts/patch-dbeaver-gaussdb-catalogs.sh

@@ -0,0 +1,112 @@
+#!/bin/bash
+# 让 Generic 驱动下使用 PostgreSQL JDBC 的数据源（如 GaussDB）通过 pg_database 列出所有数据库，
+# 而不是仅显示当前连接的数据库。
+# 用法: 传入 dbeaver 根目录
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [ -n "$1" ]; then
+    DBEAVER_ROOT="$1"
+else
+    DBEAVER_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)/../dbeaver"
+fi
+
+JAVA_FILE="${DBEAVER_ROOT}/plugins/org.jkiss.dbeaver.ext.generic/src/org/jkiss/dbeaver/ext/generic/model/GenericDataSource.java"
+if [ ! -f "$JAVA_FILE" ]; then
+    echo "GenericDataSource.java not found: $JAVA_FILE"
+    echo "Usage: $0 [dbeaver_root]"
+    exit 1
+fi
+
+if grep -q 'isPostgreSQLCompatible' "$JAVA_FILE"; then
+    echo "GenericDataSource already patched for PostgreSQL/GaussDB catalogs, skip."
+    exit 0
+fi
+
+python3 - "$JAVA_FILE" << 'PY'
+import sys
+path = sys.argv[1]
+with open(path, "r", encoding="utf-8", errors="replace") as f:
+    content = f.read()
+
+# 在 getCatalogsNames 方法开头、 "final List<String> catalogNames = new ArrayList<>();" 之后
+# 插入 isPostgreSQLCompatible 方法和 PostgreSQL 分支；并把原 try 保留为 else 分支
+old_sig = """    public List<String> getCatalogsNames(
+        @NotNull DBRProgressMonitor monitor,
+        @NotNull JDBCDatabaseMetaData metaData,
+        GenericMetaObject catalogObject,
+        @Nullable DBSObjectFilter catalogFilters
+    ) throws DBException {
+        final List<String> catalogNames = new ArrayList<>();
+        try {
+            try (JDBCResultSet dbResult = metaData.getCatalogs()) {"""
+
+new_block = """    /**
+     * True if this connection uses PostgreSQL JDBC (e.g. PostgreSQL, GaussDB, openGauss).
+     * Such drivers report only the current database from getCatalogs(); we use pg_database to list all.
+     */
+    private boolean isPostgreSQLCompatible() {
+        String driverClass = getContainer().getDriver().getDriverClassName();
+        if (driverClass != null && driverClass.contains("postgresql")) {
+            return true;
+        }
+        String url = getContainer().getConnectionConfiguration().getUrl();
+        return url != null && url.startsWith("jdbc:postgresql:");
+    }
+
+    public List<String> getCatalogsNames(
+        @NotNull DBRProgressMonitor monitor,
+        @NotNull JDBCDatabaseMetaData metaData,
+        GenericMetaObject catalogObject,
+        @Nullable DBSObjectFilter catalogFilters
+    ) throws DBException {
+        final List<String> catalogNames = new ArrayList<>();
+        // PostgreSQL JDBC getCatalogs() returns only the current database; use pg_database for full list
+        if (isPostgreSQLCompatible()) {
+            String pgDatabaseSql = "SELECT datname FROM pg_catalog.pg_database WHERE NOT datistemplate AND datallowconn ORDER BY datname";
+            try {
+                try (JDBCSession session = DBUtils.openMetaSession(monitor, this, "Read database list")) {
+                    try (JDBCStatement stmt = session.createStatement()) {
+                        try (JDBCResultSet rs = stmt.executeQuery(pgDatabaseSql)) {
+                            while (rs.next()) {
+                                String name = JDBCUtils.safeGetStringTrimmed(rs, 1);
+                                if (CommonUtils.isNotEmpty(name)) {
+                                    if (catalogFilters == null || catalogFilters.matches(name)) {
+                                        catalogNames.add(name);
+                                        monitor.subTask("Extract catalogs - " + name);
+                                    } else {
+                                        catalogsFiltered = true;
+                                    }
+                                    if (monitor.isCanceled()) {
+                                        break;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                if (catalogNames.size() == 1 && omitSingleCatalog) {
+                    catalogNames.clear();
+                }
+                return catalogNames;
+            } catch (SQLException e) {
+                if (metaModel.isCatalogsOptional()) {
+                    log.warn("Can't read database list from pg_database", e);
+                    return catalogNames;
+                }
+                throw new DBException("Error reading database list", e);
+            }
+        }
+        try {
+            try (JDBCResultSet dbResult = metaData.getCatalogs()) {"""
+
+if old_sig not in content:
+    sys.exit("Could not find getCatalogsNames insertion point in GenericDataSource.java")
+content = content.replace(old_sig, new_block, 1)
+
+with open(path, "w", encoding="utf-8") as f:
+    f.write(content)
+print("Patched GenericDataSource.java: PostgreSQL/GaussDB full database list via pg_database.")
+PY
+
+echo "Done."