method
index_name_exists?
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Class: SchemaStatements
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index_name_exists?(table_name, index_name, default)
public
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# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 128 def index_name_exists?(table_name, index_name, default) exec_query( SELECT COUNT(*) FROM pg_class t INNER JOIN pg_index d ON t.oid = d.indrelid INNER JOIN pg_class i ON d.indexrelid = i.oid WHERE i.relkind = 'i' AND i.relname = '#{index_name}' AND t.relname = '#{table_name}' AND i.relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname = ANY (current_schemas(false)) ), 'SCHEMA').rows.first[0].to_i > 0 end