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Editorial Team
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Asked: 2026-05-27T23:01:03+00:00

I am trying to understand the way functions are called in this tutorial http://docs.phonegap.com/en/1.3.0/phonegap_storage_storage.md.html#SQLResultSetList

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I am trying to understand the way functions are called in this tutorial
http://docs.phonegap.com/en/1.3.0/phonegap_storage_storage.md.html#SQLResultSetList

(* I tried googling about call back function but still don’t get these )

  1. at the end there is db.transaction(populateDB, errorCB, successCB); does that mean it will call function populateDB and if it fails it call errorCB and if it success it call successCB ? or what are the sequence of the function calls ?

  2. Then upper to that there is tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB);
     What does [ ] mean ? And again what is the sequence of function called as now querySuccess is before errorCB ( unlike the Q1. case ) ?

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1 Answer

  1. Editorial Team
    1. Yes it will execute populateDB, then successCB on success, and errorCB on error
    2. [] means empty array, and again by their names it looks like querySucces will be execute on success, and errorCB on error,

    but check the api documentation for those functions (transaction and executeSql) to see what each argument is for, it should tell you the purpose of each argument

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