Thread: pgsql: Add overflow checks to int4 and int8 versions of generate_series

Add overflow checks to int4 and int8 versions of generate_series().

The previous code went into an infinite loop after overflow.  In fact,
an overflow is not really an error; it just means that the current
value is the last one we need to return.  So, just arrange to stop
immediately when overflow is detected.

Back-patch all the way.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/925079063fc429b94c52c5f9174c20157bc39e66

Modified Files
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src/backend/utils/adt/int.c  |    4 ++++
src/backend/utils/adt/int8.c |    4 ++++
2 files changed, 8 insertions(+), 0 deletions(-)