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Work around an SQLite limit that can cause a 1.0->2.0 upgrade error in very rare cases (in code from July 2008)

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This commit is contained in:
Dan Stillman 2010-03-15 07:16:05 +00:00
parent a8e03b1830
commit 65f493471f
1 changed files with 15 additions and 2 deletions
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17
chrome/content/zotero/xpcom/schema.js
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@ -1978,12 +1978,25 @@ Zotero.Schema = new function(){
var rows = Zotero.DB.columnQuery("SELECT GROUP_CONCAT(valueID) FROM itemDataValues GROUP BY value HAVING COUNT(*) > 1");
for each(var row in rows) {
var ids = row.split(',');
var id = parseInt(ids[0]);
var deleteIDs = [];
for (var j=1; j<ids.length; j++) {
deleteIDs.push(parseInt(ids[j]));
}
Zotero.DB.query("UPDATE itemData SET valueID=? WHERE valueID IN (" + deleteIDs.map(function () '?').join() + ")", [parseInt(ids[0])].concat(deleteIDs));
Zotero.DB.query("DELETE FROM itemDataValues WHERE valueID IN (" + deleteIDs.map(function () '?').join() + ")", deleteIDs);
var done = 0;
var max = 998; // compiled limit
var num = deleteIDs.length;
do {
var chunk = deleteIDs.splice(0, max);
Zotero.DB.query("UPDATE itemData SET valueID=? WHERE valueID IN (" + chunk.map(function () '?').join() + ")", [id].concat(chunk));
Zotero.DB.query("DELETE FROM itemDataValues WHERE valueID IN (" + chunk.map(function () '?').join() + ")", chunk);
done += chunk.length;
}
while (done < num);
}
Zotero.DB.query("CREATE UNIQUE INDEX itemDataValues_value ON itemDataValues(value)");