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feat: add trigram index to tags (#6615)

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Fixes: chatwoot/product#796

This migration adds a trigram index to the tags table on the name column. This is used to speed up the search for tags by name, this is a heavy sub-query when generating reports where labels are involved.

Trigram indexes are used to speed up LIKE queries; they are not used for equality queries. This is because the index is not a btree index, it is a GIN index. This means that the index is not ordered and so cannot be used for equality queries.

Read more: https://www.postgresql.org/docs/current/pgtrgm.html

The index is created concurrently: https://thoughtbot.com/blog/how-to-create-postgres-indexes-concurrently-in
---------

Co-authored-by: Sojan <sojan@pepalo.com>
This commit is contained in:
Shivam Mishra
2023-03-08 18:11:07 +05:30
committed by GitHub
parent d59fd6b747
commit 0fe05dc1b9
2 changed files with 43 additions and 21 deletions
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43
db/schema.rb
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@@ -10,7 +10,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 2023_03_02_054408) do
ActiveRecord::Schema.define(version: 2023_03_06_100327) do
# These are extensions that must be enabled in order to support this database
enable_extension "pg_stat_statements"
@@ -153,26 +153,26 @@ ActiveRecord::Schema.define(version: 2023_03_02_054408) do
t.index ["message_id"], name: "index_attachments_on_message_id"
end
create_table 'audits', force: :cascade do |t|
t.bigint 'auditable_id'
t.string 'auditable_type'
t.bigint 'associated_id'
t.string 'associated_type'
t.bigint 'user_id'
t.string 'user_type'
t.string 'username'
t.string 'action'
t.jsonb 'audited_changes'
t.integer 'version', default: 0
t.string 'comment'
t.string 'remote_address'
t.string 'request_uuid'
t.datetime 'created_at'
t.index %w[associated_type associated_id], name: 'associated_index'
t.index %w[auditable_type auditable_id version], name: 'auditable_index'
t.index ['created_at'], name: 'index_audits_on_created_at'
t.index ['request_uuid'], name: 'index_audits_on_request_uuid'
t.index %w[user_id user_type], name: 'user_index'
create_table "audits", force: :cascade do |t|
t.bigint "auditable_id"
t.string "auditable_type"
t.bigint "associated_id"
t.string "associated_type"
t.bigint "user_id"
t.string "user_type"
t.string "username"
t.string "action"
t.jsonb "audited_changes"
t.integer "version", default: 0
t.string "comment"
t.string "remote_address"
t.string "request_uuid"
t.datetime "created_at"
t.index ["associated_type", "associated_id"], name: "associated_index"
t.index ["auditable_type", "auditable_id", "version"], name: "auditable_index"
t.index ["created_at"], name: "index_audits_on_created_at"
t.index ["request_uuid"], name: "index_audits_on_request_uuid"
t.index ["user_id", "user_type"], name: "user_index"
end
create_table "automation_rules", force: :cascade do |t|
@@ -816,6 +816,7 @@ ActiveRecord::Schema.define(version: 2023_03_02_054408) do
create_table "tags", id: :serial, force: :cascade do |t|
t.string "name"
t.integer "taggings_count", default: 0
t.index "lower((name)::text) gin_trgm_ops", name: "tags_name_trgm_idx", using: :gin
t.index ["name"], name: "index_tags_on_name", unique: true
end