写入模式支持用户自定义GQL template

[xiajingchun]

[MuYiYong]

客户期望把下面的 procedure 能够通过 exchange 来调用，省去他自己省去做导数工具的工作
"""
CREATE PROCEDURE prepare_data(strAddress STRING, endAddress STRING, amount FLOAT, tstime LOCAL DATETIME) AS {
value start_node = value {match (v@Account{address:strAddress}) return v limit 1}
value end_node = value {match (v@Account{address:endAddress}) return v limit 1}
value edge = value {match (v@Account{address:strAddress})-[e@Transfer]->(v2@Account{address:endAddress}) return e limit 1}

//起点和终点不存在，创建起点/终点/边
if start_node is null and end_node is null then {
    INSERT OR UPDATE (@Account{address:strAddress, is_black: False, black_detail: [], is_hot: False, is_tag: False, tag_detail: [], in_count: 0, out_count: 1})-[@Transfer{sum: amount,first_time: tstime, last_time:tstime}]->(@Account{address:endAddress, is_black: False, black_detail: [], is_hot: False, is_tag: False, tag_detail: [], in_count: 1, out_count:0})
}
//起点存在，终点不存在，创建终点/边
elseif start_node is not null and end_node is null then {
    INSERT OR UPDATE (@Account{address:strAddress, out_count:start_node.out_count + 1})-[@Transfer{sum: amount,first_time: tstime, last_time:tstime}]->(@Account{address:endAddress, is_black: False, black_detail: [], is_hot: False, is_tag: False, tag_detail: [], in_count: 1, out_count:0})        
}
//起点不存在，终点存在，创建起点/边
elseif start_node is null and end_node is not null then {
    INSERT OR UPDATE (@Account{address:strAddress, is_black: False, black_detail: [], is_hot: False, is_tag: False, tag_detail: [], in_count: 0, out_count: 1})-[@Transfer{sum: amount,first_time: tstime, last_time:tstime}]->(@Account{address:endAddress, out_count:end_node.in_count + 1})
}
//起点和终点均存在
else {
    //且边不存在
    if edge is null then {
     INSERT OR UPDATE (@Account{address:strAddress})-[@Transfer{sum: amount,first_time: tstime, last_time:tstime}]->(@Account{address:endAddress})           
    }
    //边存在，更新边属性
    elseif edge is not null and edge.last_time < tstime then {
        INSERT OR UPDATE (@Account{address:strAddress})-[@Transfer{sum: amount + edge.sum ,first_time: edge.first_time, last_time:tstime}]->(@Account{address:endAddress}) 
    }
}

}
"""

"""
call prepare_data("T9yDWrFUSFhRB867o5vZX7xePyrkekfmMD","T9yDXQFY3JihARkz1GcWZ55jozoh4DeDEg",1,local_datetime("2023-02-19T10:33:00")) FINISH
"""