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Add trim_array() function.

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This has been in the SQL spec since 2008.  It's a pretty thin
wrapper around the array slice functionality, but the spec
says we should have it, so here it is.

Vik Fearing, reviewed by Dian Fay

Discussion: https://postgr.es/m/fc92ce17-9655-8ff1-c62a-4dc4c8ccd815@postgresfriends.org
This commit is contained in:
Tom Lane
2021-03-03 16:39:57 -05:00
parent 3769e11a31
commit 0a687c8f10
7 changed files with 100 additions and 2 deletions
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2
src/backend/catalog/sql_features.txt
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@@ -398,7 +398,7 @@ S301 Enhanced UNNEST YES
S401 Distinct types based on array types NO
S402 Distinct types based on distinct types NO
S403 ARRAY_MAX_CARDINALITY NO
S404 TRIM_ARRAY NO
S404 TRIM_ARRAY YES
T011 Timestamp in Information Schema NO
T021 BINARY and VARBINARY data types NO
T022 Advanced support for BINARY and VARBINARY data types NO