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Improve documentation about CREATE TABLE ... LIKE.

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The docs failed to explain that LIKE INCLUDING INDEXES would not preserve
the names of indexes and associated constraints.  Also, it wasn't mentioned
that EXCLUDE constraints would be copied by this option.  The latter
oversight seems enough of a documentation bug to justify back-patching.

In passing, do some minor copy-editing in the same area, and add an entry
for LIKE under "Compatibility", since it's not exactly a faithful
implementation of the standard's feature.

Discussion: <20160728151154.AABE64016B@smtp.hushmail.com>
This commit is contained in:
Tom Lane
2016-07-28 13:26:58 -04:00
parent d9e74959a7
commit 46b773d4fe
2 changed files with 39 additions and 17 deletions
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4
src/backend/parser/parse_utilcmd.c
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@ -1143,7 +1143,9 @@ generateClonedIndexStmt(CreateStmtContext *cxt, Relation source_idx,
/*
* We don't try to preserve the name of the source index; instead, just
* let DefineIndex() choose a reasonable name.
* let DefineIndex() choose a reasonable name. (If we tried to preserve
* the name, we'd get duplicate-relation-name failures unless the source
* table was in a different schema.)
*/
index->idxname = NULL;