Add indexing for isbn and issn.
Dan Weston
This commit is contained in:
Bruce Momjian
parent
407bd1c29b
commit
eb4e4fd262
1 changed files with 188 additions and 2 deletions
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@ -1,7 +1,7 @@
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--
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-- PostgreSQL code for ISSNs.
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--
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-- $Id: isbn_issn.sql.in,v 1.2 2000/06/19 13:53:39 momjian Exp $
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-- $Id: isbn_issn.sql.in,v 1.3 2002/06/23 21:20:38 momjian Exp $
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--
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@ -116,7 +116,7 @@ create operator <> (
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--
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-- PostgreSQL code for ISBNs.
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--
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-- $Id: isbn_issn.sql.in,v 1.2 2000/06/19 13:53:39 momjian Exp $
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-- $Id: isbn_issn.sql.in,v 1.3 2002/06/23 21:20:38 momjian Exp $
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--
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--
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-- Input and output functions and the type itself:
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@ -223,6 +223,192 @@ create operator <> (
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procedure = isbn_ne
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);
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-------------------------------------------------
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-- Create default operator class for 'isbn' --
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-- Needed to create index or primary key --
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-------------------------------------------------
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-- Register new operator class with system catalog pg_opclass
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insert into pg_opclass
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(opcamid, opcname, opcintype, opcdefault, opckeytype)
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values ((select oid from pg_am where amname = 'btree'),
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'isbn_ops',
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(select oid from pg_type where typname = 'isbn'),
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true,
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0);
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-- Verify that new operator class was added to pg_opclass
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-- select oid,* from pg_opclass where opcname = 'isbn_ops';
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-- Identify comparison operators for 'isbn' type
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select o.oid as opoid, o.oprname
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into temp table isbn_ops_tmp
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from pg_operator o, pg_type t
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where o.oprleft = t.oid
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and o.oprright = t.oid
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and t.typname = 'isbn';
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-- Make sure all 5 needed order ops are there (<, <=, =, >=, >)
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-- Operator <> will be present but is not needed
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-- select * from isbn_ops_tmp order by opoid;
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-- Associate B-tree strategy 1 with <
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 1, false, c.opoid
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from pg_opclass opcl, isbn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'isbn_ops'
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and c.oprname = '<';
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-- Associate B-tree strategy 2 with <=
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 2, false, c.opoid
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from pg_opclass opcl, isbn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'isbn_ops'
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and c.oprname = '<=';
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-- Associate B-tree strategy 3 with =
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 3, false, c.opoid
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from pg_opclass opcl, isbn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'isbn_ops'
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and c.oprname = '=';
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-- Associate B-tree strategy 4 with >=
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 4, false, c.opoid
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from pg_opclass opcl, isbn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'isbn_ops'
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and c.oprname = '>=';
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-- Associate B-tree strategy 5 with >
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 5, false, c.opoid
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from pg_opclass opcl, isbn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'isbn_ops'
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and c.oprname = '>';
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-- Register 'isbn' comparison function
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create function isbn_cmp(isbn, isbn)
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returns integer
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as '$libdir/isbn_issn'
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language c;
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-- Make sure that function was correctly registered
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-- select oid, proname from pg_proc where proname = 'isbn_cmp';
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-- Associate default btree operator class with 'isbn' comparison function
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insert into pg_amproc
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(amopclaid, amprocnum, amproc)
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select opcl.oid, 1, p.oid
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from pg_opclass opcl, pg_proc p
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'isbn_ops'
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and p.proname = 'isbn_cmp';
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-------------------------------------------------
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-- Create default operator class for 'issn' --
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-- Needed to create index or primary key --
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-------------------------------------------------
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-- Register new operator class with system catalog pg_opclass
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insert into pg_opclass
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(opcamid, opcname, opcintype, opcdefault, opckeytype)
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values ((select oid from pg_am where amname = 'btree'),
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'issn_ops',
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(select oid from pg_type where typname = 'issn'),
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true,
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0);
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-- Verify that new operator class was added to pg_opclass
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-- select oid,* from pg_opclass where opcname = 'issn_ops';
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-- Identify comparison operators for 'issn' type
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select o.oid as opoid, o.oprname
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into temp table issn_ops_tmp
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from pg_operator o, pg_type t
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where o.oprleft = t.oid
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and o.oprright = t.oid
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and t.typname = 'issn';
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-- Make sure all 5 needed order ops are there (<, <=, =, >=, >)
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-- Operator <> will be present but is not needed
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-- select * from issn_ops_tmp order by opoid;
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-- Associate B-tree strategy 1 with <
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 1, false, c.opoid
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from pg_opclass opcl, issn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'issn_ops'
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and c.oprname = '<';
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-- Associate B-tree strategy 2 with <=
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 2, false, c.opoid
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from pg_opclass opcl, issn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'issn_ops'
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and c.oprname = '<=';
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-- Associate B-tree strategy 3 with =
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 3, false, c.opoid
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from pg_opclass opcl, issn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'issn_ops'
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and c.oprname = '=';
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-- Associate B-tree strategy 4 with >=
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 4, false, c.opoid
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from pg_opclass opcl, issn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'issn_ops'
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and c.oprname = '>=';
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-- Associate B-tree strategy 5 with >
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insert into pg_amop
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(amopclaid, amopstrategy, amopreqcheck, amopopr)
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select opcl.oid, 5, false, c.opoid
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from pg_opclass opcl, issn_ops_tmp c
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'issn_ops'
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and c.oprname = '>';
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-- Register 'issn' comparison function
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create function issn_cmp(issn, issn)
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returns integer
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as '$libdir/issn_issn'
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language c;
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-- Make sure that function was correctly registered
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-- select oid, proname from pg_proc where proname = 'issn_cmp';
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-- Associate default btree operator class with 'issn' comparison function
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insert into pg_amproc
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(amopclaid, amprocnum, amproc)
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select opcl.oid, 1, p.oid
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from pg_opclass opcl, pg_proc p
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where opcamid = (select oid from pg_am where amname = 'btree')
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and opcname = 'issn_ops'
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and p.proname = 'issn_cmp';
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--
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-- eof
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--
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