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pgsql: Add string_agg aggregate functions.

From: itagaki(at)postgresql(dot)org (Takahiro Itagaki)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Add string_agg aggregate functions.
Date: 2010-02-01 03:14:45
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Lists: pgsql-committers
Log Message:
Add string_agg aggregate functions. The one argument version concatenates
the input values into a string. The two argument version also does the same
thing, but inserts delimiters between elements.

Original patch by Pavel Stehule, reviewed by David E. Wheeler and me.

Modified Files:
        func.sgml (r1.498 -> r1.499)
        varlena.c (r1.174 -> r1.175)
        catversion.h (r1.581 -> r1.582)
        pg_aggregate.h (r1.70 -> r1.71)
        pg_proc.h (r1.566 -> r1.567)
        builtins.h (r1.345 -> r1.346)
        aggregates.out (r1.20 -> r1.21)
        aggregates.sql (r1.16 -> r1.17)

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