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fastRows iterator doco updated to clarify what happens

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when break a fastRows loop
This commit is contained in:
JamesP
2015-09-05 11:47:28 +10:00
parent da2d0845b8
commit 5b11ce27c4
1 changed files with 7 additions and 3 deletions
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10
lib/impure/db_mysql.nim
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@@ -140,9 +140,13 @@ proc properFreeResult(sqlres: mysql.PRES, row: cstringArray) =
iterator fastRows*(db: DbConn, query: SqlQuery,
args: varargs[string, `$`]): Row {.tags: [FReadDB].} =
## executes the query and iterates over the result dataset. This is very
## fast, but potenially dangerous: If the for-loop-body executes another
## query, the results can be undefined. For MySQL this is the case!.
## executes the query and iterates over the result dataset.
##
## This is very fast, but potenially dangerous. Use this iterator only
## if you require ALL the rows.
##
## Breaking the fastRows() iterator during a loop will cause the next
## database query to raise an [EDb] exception ``Commands out of sync``.
rawExec(db, query, args)
var sqlres = mysql.useResult(db)
if sqlres != nil: