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Support renaming an existing value of an enum type.

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Not much to be said about this patch: it does what it says on the tin.

In passing, rename AlterEnumStmt.skipIfExists to skipIfNewValExists
to clarify what it actually does.  In the discussion of this patch
we considered supporting other similar options, such as IF EXISTS
on the type as a whole or IF NOT EXISTS on the target name.  This
patch doesn't actually add any such feature, but it might happen later.

Dagfinn Ilmari Mannsåker, reviewed by Emre Hasegeli

Discussion: <CAO=2mx6uvgPaPDf-rHqG8=1MZnGyVDMQeh8zS4euRyyg4D35OQ@mail.gmail.com>
This commit is contained in:
Tom Lane
2016-09-07 16:11:56 -04:00
parent bd180b6079
commit 0ab9c56d0f
10 changed files with 209 additions and 30 deletions
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3
src/backend/nodes/copyfuncs.c
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@ -3375,10 +3375,11 @@ _copyAlterEnumStmt(const AlterEnumStmt *from)
AlterEnumStmt *newnode = makeNode(AlterEnumStmt);
COPY_NODE_FIELD(typeName);
COPY_STRING_FIELD(oldVal);
COPY_STRING_FIELD(newVal);
COPY_STRING_FIELD(newValNeighbor);
COPY_SCALAR_FIELD(newValIsAfter);
COPY_SCALAR_FIELD(skipIfExists);
COPY_SCALAR_FIELD(skipIfNewValExists);
return newnode;
}