pgsql: doc: mention that INSERT can block because of unique indexes

doc: mention that INSERT can block because of unique indexes

Initial patch by David G. Johnston.

Reported-by: David G. Johnston

Discussion: /messages/by-id/CAKFQuwZpbdzceO41VE-xt1Xh8rWRRfgopTAK1wL9EhCo0Am-Sw@mail.gmail.com

Backpatch-through: 10

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/6959e971b35e7e6e10d61b95699cec7985d053b1

Modified Files
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doc/src/sgml/ref/insert.sgml | 5 +++++
1 file changed, 5 insertions(+)