If I lock the meta before check exists, will work this out.
Like
db.lockMeta(session);
if (getSchema().findTableOrView(session, data.tableName) != null) {
if (ifNotExists) {
return 0;
}
throw DbException.get(ErrorCode.TABLE_OR_VIEW_ALREADY_EXISTS_1,
data.tableName);
}
SO, here is a problem, should this part multi-thread-able ?
This affect all H2 create dml, maybe we should check if multi-thread is
enabled, we should lock the exists check.make the whole dml update is
single threaded.
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