SYSTEM CATALOG · System catalog

pg_pltemplate

PostgreSQL documentation ↗Source definition ↗

The catalog pg_pltemplate stores “template” information for procedural languages. A template for a language allows the language to be created in a particular database by a simple CREATE LANGUAGE command, with no need to specify implementation details. Unlike most system catalogs, pg_pltemplate is shared across all databases of a cluster: there is only one copy of pg_pltemplate per cluster, not one per database. This allows the information to be accessible in each database as it is needed.

First seen PG 9.0Last seen PG 12Columns 8

9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19^β3

Checked column by column against a PostgreSQL 12.22 instance · Raw measurement record ↗

Columns PostgreSQL 12

pg_pltemplate

COLUMN	TYPE	DESCRIPTION
`tmplname`	`name`NOT NULL	Name of the language this template is for
`tmpltrusted`	`boolean`NOT NULL	True if language is considered trusted
`tmpldbacreate`	`boolean`NOT NULL	True if language may be created by a database owner
`tmplhandler`	`text`NOT NULL	Name of call handler function
`tmplinline`	`text`	Name of anonymous-block handler function, or null if none
`tmplvalidator`	`text`	Name of validator function, or null if none
`tmpllibrary`	`text`NOT NULL	Path of shared library that implements language
`tmplacl`	`aclitem[]`	Access privileges for template (not actually used)

Columns marked "implicit" are not included in SELECT *; some early statistics views are completed from same-version source, and the extra provenance is shown in the column description.

Common system columns 6

System attributes PostgreSQL provides, normally not expanded by SELECT *. Kept separately so they are not mixed in with ordinary columns.

Columns	Type	attnum
`tableoid`	`oid`	-6
`cmax`	`cid`	-5
`xmax`	`xid`	-4
`cmin`	`cid`	-3
`xmin`	`xid`	-2
`ctid`	`tid`	-1

Column evolution matrix

Hover a cell for the column type

PresentAdded / type or attribute changeRemoved

COLUMN	13	14	15	16	17	18	19
`tmplname`	−	–	–	–	–	–	–
`tmpltrusted`	−	–	–	–	–	–	–
`tmpldbacreate`	−	–	–	–	–	–	–
`tmplhandler`	−	–	–	–	–	–	–
`tmplinline`	−	–	–	–	–	–	–
`tmplvalidator`	−	–	–	–	–	–	–
`tmpllibrary`	−	–	–	–	–	–	–
`tmplacl`	−	–	–	–	–	–	–

9.0 is the coverage baseline; a column already present in the baseline is not marked as added. The matrix aligns columns by name, so a rename appears as the old column removed and a new column added.

Evolution timeline

Changes between adjacent majors

PostgreSQL 13 ← 12Catalog removed

− tmplname− tmpltrusted− tmpldbacreate− tmplhandler− tmplinline− tmplvalidator− tmpllibrary− tmplacl

PostgreSQL 10 ← 9.6

Catalog description updated

PostgreSQL 9.5 ← 9.4

~ tmplhandler: not_null: false → true~ tmpllibrary: not_null: false → true

PostgreSQL 9.1 ← 9.0

1 column description updates

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