{"title":"Indeks model khusus PostgreSQL","version":"5.1","locale":"id","docname":"ref/contrib/postgres/indexes","url":"/id/5.1/ref/contrib/postgres/indexes/","canonical":"https://djangodocs.dev/id/5.1/ref/contrib/postgres/indexes/","summary":"Berikut adalah indexes khusus PostgreSQL tersedia dari modul django.contrib.postgres.indexes . BloomIndex Link to this heading # class BloomIndex ( * expressions ,…","html":"

Indeks model khusus PostgreSQLLink to this heading#

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Berikut adalah indexes khusus PostgreSQL tersedia dari modul django.contrib.postgres.indexes.

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BloomIndexLink to this heading#

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\nclass BloomIndex(*expressions, length=None, columns=(), **options)Link to this definition#
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Creates a bloom index.

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To use this index access you need to activate the bloom extension on\nPostgreSQL. You can install it using the\nBloomExtension migration\noperation.

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Provide an integer number of bits from 1 to 4096 to the length\nparameter to specify the length of each index entry. PostgreSQL's default\nis 80.

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The columns argument takes a tuple or list of up to 32 values that are\ninteger number of bits from 1 to 4095.

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BrinIndexLink to this heading#

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\nclass BrinIndex(*expressions, autosummarize=None, pages_per_range=None, **options)Link to this definition#
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Creates a BRIN index.

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Lihat parameter autosummarize menjadi True untuk mengadakan automatic summarization untuk dilakukan oleh autovacuum.

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Argumen pages_per_range megnambil integer positif.

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BTreeIndexLink to this heading#

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\nclass BTreeIndex(*expressions, fillfactor=None, deduplicate_items=None, **options)Link to this definition#
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Membuat sebuah indeks B-Tree.

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Sediakan nilai integer dari 10 ke 100 pada parameter fillfactor untuk mengatur bagaimana halaman indeks dibungkus. Awalan PostgreSQL adalah 90.

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Provide a boolean value to the deduplicate_items parameter to control\nwhether deduplication is enabled. PostgreSQL enables deduplication by\ndefault.

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GinIndexLink to this heading#

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\nclass GinIndex(*expressions, fastupdate=None, gin_pending_list_limit=None, **options)Link to this definition#
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Membuat sebuah gin index.

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To use this index on data types not in the built-in operator classes,\nyou need to activate the btree_gin extension on\nPostgreSQL. You can install it using the\nBtreeGinExtension migration\noperation.

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Setel parameter fastupdate menjadi False untuk meniadakan GIN Fast Update Technique yang diadakan secara awalan di PostgreSQL.

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Provide an integer number of kilobytes to the gin_pending_list_limit\nparameter to tune the maximum size of the GIN pending list which is used\nwhen fastupdate is enabled.

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GistIndexLink to this heading#

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\nclass GistIndex(*expressions, buffering=None, fillfactor=None, **options)Link to this definition#
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Membuat sebuah GiST index. Indeks-indeks ini otomatis dibuat pada bidang spasial dengan spatial_index=True. Mereka juga berguna pada jenis lain, seperti HStoreField atau range fields.

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To use this index on data types not in the built-in gist operator classes,\nyou need to activate the btree_gist extension on PostgreSQL.\nYou can install it using the\nBtreeGistExtension migration\noperation.

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Setel parameter buffering menjadi True atau False untuk secara manual mengadakan atau meniadakan buffering build dari indeks.

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Sediakan nilai integer dari 10 ke 100 pada parameter fillfactor untuk mengatur bagaimana halaman indeks dibungkus. Awalan PostgreSQL adalah 90.

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HashIndexLink to this heading#

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\nclass HashIndex(*expressions, fillfactor=None, **options)Link to this definition#
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Membuat sebuah indeks campuran.

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Sediakan nilai integer dari 10 ke 100 pada parameter fillfactor untuk mengatur bagaimana halaman indeks dibungkus. Awalan PostgreSQL adalah 90.

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SpGistIndexLink to this heading#

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\nclass SpGistIndex(*expressions, fillfactor=None, **options)Link to this definition#
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Membuat sebuah SP-GiST index.

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Sediakan nilai integer dari 10 ke 100 pada parameter fillfactor untuk mengatur bagaimana halaman indeks dibungkus. Awalan PostgreSQL adalah 90.

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OpClass() expressionsLink to this heading#

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\nclass OpClass(expression, name)Link to this definition#
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An OpClass() expression represents the expression with a custom\noperator class that can be used to define functional indexes, functional\nunique constraints, or exclusion constraints. To use it, you need to add\n'django.contrib.postgres' in your INSTALLED_APPS. Set the\nname parameter to the name of the operator class.

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Sebagai contoh:

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Index(\n    OpClass(Lower("username"), name="varchar_pattern_ops"),\n    name="lower_username_idx",\n)\n
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creates an index on Lower('username') using varchar_pattern_ops.

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UniqueConstraint(\n    OpClass(Upper("description"), name="text_pattern_ops"),\n    name="upper_description_unique",\n)\n
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creates a unique constraint on Upper('description') using\ntext_pattern_ops.

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ExclusionConstraint(\n    name="exclude_overlapping_ops",\n    expressions=[\n        (OpClass("circle", name="circle_ops"), RangeOperators.OVERLAPS),\n    ],\n)\n
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creates an exclusion constraint on circle using circle_ops.

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