PostgreSQL 7.4.11 Documentation
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# 39.5. Missing Features

The following features are currently missing from PL/Perl, but they would make welcome contributions.

- PL/Perl functions cannot call each other directly (because they are anonymous subroutines inside Perl). There's presently no way for them to share global variables, either.

- PL/Perl cannot be used to write trigger functions.

- DBD::PgSPI or similar capability should be integrated into the standard PostgreSQL distribution.

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