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Allow forcing nullness of columns during bootstrap.

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Bootstrap determines whether a column is null based on simple builtin
rules. Those work surprisingly well, but nonetheless a few existing
columns aren't set correctly. Additionally there is at least one patch
sent to hackers where forcing the nullness of a column would be helpful.

The boostrap format has gained FORCE [NOT] NULL for this, which will be
emitted by genbki.pl when BKI_FORCE_(NOT_)?NULL is specified for a
column in a catalog header.

This patch doesn't change the marking of any existing columns.

Discussion: 20150215170014.GE15326@awork2.anarazel.de
This commit is contained in:
Andres Freund
2015-02-21 22:25:49 +01:00
parent 0627eff360
commit eb68379c38
9 changed files with 131 additions and 49 deletions
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9
doc/src/sgml/bki.sgml
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@ -75,9 +75,12 @@
<optional><literal>without_oids</></optional>
<optional><literal>rowtype_oid</> <replaceable>oid</></optional>
(<replaceable class="parameter">name1</replaceable> =
<replaceable class="parameter">type1</replaceable> <optional>,
<replaceable class="parameter">name2</replaceable> = <replaceable
class="parameter">type2</replaceable>, ...</optional>)
<replaceable class="parameter">type1</replaceable>
<optional>FORCE NOT NULL | FORCE NULL </optional> <optional>,
<replaceable class="parameter">name2</replaceable> =
<replaceable class="parameter">type2</replaceable>
<optional>FORCE NOT NULL | FORCE NULL </optional>,
...</optional>)
</term>
<listitem>