method
optimizer_hints
v6.1.3.1 -
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Class: ActiveRecord::QueryMethods
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optimizer_hints(*args)
public
Specify optimizer hints to be used in the SELECT statement.
Example (for MySQL):
Topic.optimizer_hints("MAX_EXECUTION_TIME(50000)", "NO_INDEX_MERGE(topics)") # SELECT /*+ MAX_EXECUTION_TIME(50000) NO_INDEX_MERGE(topics) */ `topics`.* FROM `topics`
Example (for PostgreSQL with pg_hint_plan):
Topic.optimizer_hints("SeqScan(topics)", "Parallel(topics 8)") # SELECT /*+ SeqScan(topics) Parallel(topics 8) */ "topics".* FROM "topics"