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Allow omitting one or both boundaries in an array slice specifier.

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Omitted boundaries represent the upper or lower limit of the corresponding
array subscript.  This allows simpler specification of many common
use-cases.

(Revised version of commit 9246af6799)

YUriy Zhuravlev
This commit is contained in:
Tom Lane
2015-12-22 21:05:16 -05:00
parent 0ba3f3bc65
commit 6efbded6e4
15 changed files with 302 additions and 33 deletions
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2
src/backend/parser/parse_target.c
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@ -650,7 +650,7 @@ transformAssignmentIndirection(ParseState *pstate,
if (IsA(n, A_Indices))
{
subscripts = lappend(subscripts, n);
if (((A_Indices *) n)->lidx != NULL)
if (((A_Indices *) n)->is_slice)
isSlice = true;
}
else if (IsA(n, A_Star))