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Introduce parse_ident()

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SQL-layer function to split qualified identifier into array parts.

Author: Pavel Stehule with minor editorization by me and Jim Nasby
This commit is contained in:
Teodor Sigaev
2016-03-18 18:16:14 +03:00
parent 992b5ba30d
commit 3187d6de0e
10 changed files with 375 additions and 2 deletions
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26
doc/src/sgml/func.sgml
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@ -1818,6 +1818,32 @@
<entry><literal>900150983cd24fb0 d6963f7d28e17f72</literal></entry>
</row>
<row>
<entry>
<indexterm>
<primary>parse_ident</primary>
</indexterm>
<literal><function>parse_ident(<parameter>str</parameter> <type>text</type>,
[ <parameter>strictmode</parameter> <type>boolean</type> DEFAULT true ] )</function></literal>
</entry>
<entry><type>text[]</type></entry>
<entry>Split <parameter>qualified identifier</parameter> into array
<parameter>parts</parameter>. When <parameter>strictmode</parameter> is
false, extra characters after the identifier are ignored. This is useful
for parsing identifiers for objects like functions and arrays that may
have trailing characters. By default, extra characters after the last
identifier are considered an error, but if second parameter is false,
then chararacters after last identifier are ignored. Note that this
function does not truncate quoted identifiers. If you care about that
you should cast the result of this function to name[]. A non-printable
chararacters (like 0 to 31) are displayed as hexadecimal codes always,
what can be different from PostgreSQL internal SQL identifiers
processing, when the original escaped value is displayed.
</entry>
<entry><literal>parse_ident('"SomeSchema".someTable')</literal></entry>
<entry><literal>"SomeSchema,sometable"</literal></entry>
</row>
<row>
<entry>
<indexterm>