Wiki / Functions

Decompiles the internal form of an expression stored in the system catalogs, such as the default value for a column. If the expression might contain Vars, specify the OID of the relation they refer to as the second parameter; if no Vars are expected, passing zero is sufficient.

English manual coverage begins with PostgreSQL 7.1. Source history and runtime observations have their own recorded version boundaries.

group

info

group label

系统信息函数和操作符

lang

en

layout

table-new

pages

functions-info.html

prose only

false

pg_get_expr ( expr pg_node_tree, relation oid [, pretty boolean] ) → text → text

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