Function build_nested_json

cpp/deeplake_pg/extension_init.cpp:325–349

Build nested JSON from path: ["a", "b", "c"] with value "v" -> {"a": {"b": {"c": "v"}}}

// Build nested JSON from path: ["a", "b", "c"] with value "v" -> {"a": {"b": {"c": "v"}}}
std::string build_nested_json(const std::vector<std::string>& path, const std::string& value)
{
    if (path.empty())
        return "";

    StringInfoData json;
    initStringInfo(&json);

    // Open braces for each level
    for (size_t i = 0; i < path.size(); i++) {
        appendStringInfo(&json, "{\"%s\":", path[i].c_str());
    }

    // Add value
    appendStringInfo(&json, "\"%s\"", value.c_str());

    // Close braces
    for (size_t i = 0; i < path.size(); i++) {
        appendStringInfoChar(&json, '}');
    }

    std::string result(json.data);
    pfree(json.data);
    return result;
}

// Transform ->> expressions into @> containment for JSONB index usage
void transform_jsonb_arrow_quals(Node** nodeptr)