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Send PLP_UNKNOWN for VARBINARY(MAX) too #132

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Send PLP_UNKNOWN for VARBINARY(MAX) too #132

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dfe8e09
Send PLP_NULL for VARBINARY(MAX) too to avoid exceptions
gizmo-1993 Mar 14, 2022
9cdd781
Fix typo
gizmo-1993 Mar 15, 2022
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13 changes: 12 additions & 1 deletion src/pytds/tds_types.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1155,7 +1155,18 @@ def write(self, w, val):
if val is None:
w.put_uint8(tds_base.PLP_NULL)
else:
w.put_uint8(len(val))
# Putting the actual length here causes an error when bulk inserting:
#
# While reading current row from host, a premature end-of-message
# was encountered--an incoming data stream was interrupted when
# the server expected to see more data. The host program may have
# terminated. Ensure that you are using a supported client
# application programming interface (API).
#
# See https://github.com/tediousjs/tedious/issues/197
# It is not known why this happens, but Microsoft's bcp tool
# uses PLP_UNKNOWN for nvarchar(max) as well.
w.put_uint8(tds_base.PLP_UNKNOWN)
if val:
w.put_uint(len(val))
w.write(val)
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