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Diffstat (limited to 'doc/development/sql.md')
| -rw-r--r-- | doc/development/sql.md | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/development/sql.md b/doc/development/sql.md index 7101bf7fb4b..029874011c4 100644 --- a/doc/development/sql.md +++ b/doc/development/sql.md @@ -80,7 +80,7 @@ USING GIN(column_name gin_trgm_ops); ``` The key here is the `GIN(column_name gin_trgm_ops)` part. This creates a -[GIN index](https://www.postgresql.org/docs/current/gin.html) +[GIN index](https://www.postgresql.org/docs/current/gin.html) with the operator class set to `gin_trgm_ops`. These indexes _can_ be used by `ILIKE` / `LIKE` and can lead to greatly improved performance. One downside of these indexes is that they can easily get quite large (depending @@ -397,7 +397,7 @@ default. While `WHERE IN` and `WHERE EXISTS` can be used to produce the same data it is recommended to use `WHERE EXISTS` whenever possible. While in many cases -PostgreSQL can optimise `WHERE IN` quite well there are also many cases where +PostgreSQL can optimize `WHERE IN` quite well there are also many cases where `WHERE EXISTS` performs (much) better. In Rails you have to use this by creating SQL fragments: |