lsm/Orchard
1
0
Fork 0
mirror of https://github.com/OrchardCMS/Orchard.git synced 2025-04-05 10:56:56 +08:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

Incorrect NOLOCK position in queries where there is no table alias (#8783)

Browse Source 
"WITH(NOLOCK)" is positioned before the where clause if there is no alias for the table.
This commit is contained in:
Andrea Piovanelli 2024-04-11 20:27:03 +02:00 committed by GitHub
parent 441c6da145
commit e243e8e547
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 11 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/Orchard/Data/NoLockInterceptor.cs
View File

@ -42,7 +42,7 @@ namespace Orchard.Data {
return _shellSettings.DataTablePrefix + "_" + tableName;
}
// based on https://stackoverflow.com/a/39518098/2669614
public override SqlString OnPrepareStatement(SqlString sql) {
// only work on select queries
@ -167,7 +167,7 @@ namespace Orchard.Data {
}
}
// rebuild query
for(int i = 0; i < affectedCaptures.Count; i++) {
for (int i = 0; i < affectedCaptures.Count; i++) {
var inner = affectedCaptures[i];
for (int j = i + 1; j < affectedCaptures.Count; j++) {
var outer = affectedCaptures[j];
@ -203,7 +203,7 @@ namespace Orchard.Data {
public bool IsAltered { get; set; }
public void AddNoLockHints() {
Value = AddNoLockHints(Value, TableNames);
Value = AddNoLockHints(Value, TableNames);
}
private string AddNoLockHints(string query, IEnumerable<string> tableNames) {
@ -240,13 +240,19 @@ namespace Orchard.Data {
if (tableIndex == fromIndex + 1
|| parts[tableIndex - 1].Equals(",")) {
parts.Insert(tableIndex + 2, "WITH(NOLOCK)");
if (parts[tableIndex + 1].Equals("where", StringComparison.OrdinalIgnoreCase)) {
// There is no alias in the query, so we add "WITH(NOLOCK)" immediately after table name but before the "where" clause.
parts.Insert(tableIndex + 1, "WITH(NOLOCK)");
} else {
// We add "WITH(NOLOCK)" after the table alias.
parts.Insert(tableIndex + 2, "WITH(NOLOCK)");
}
} else {
// probably doing a join, so edit the next "on" and make it
// "WITH (NOLOCK) on"
for (int i = tableIndex + 1; i < whereIndex; i++) {
if (parts[i].Trim().Equals("WITH(NOLOCK)", StringComparison.OrdinalIgnoreCase)) {
// we processed this table anme already
// we processed this table name already.
break;
}
if (parts[i].Trim().Equals("on", StringComparison.OrdinalIgnoreCase)) {