module ActiveRecord::ConnectionAdapters::Materialize::DatabaseStatements
Public Instance Methods
begin_db_transaction()
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Begins a transaction.
# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 134 def begin_db_transaction execute "BEGIN" end
begin_isolated_db_transaction(isolation)
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# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 138 def begin_isolated_db_transaction(isolation) begin_db_transaction execute "SET TRANSACTION ISOLATION LEVEL #{transaction_isolation_levels.fetch(isolation)}" end
commit_db_transaction()
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Commits a transaction.
# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 144 def commit_db_transaction execute "COMMIT" end
exec_delete(sql, name = nil, binds = [])
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# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 117 def exec_delete(sql, name = nil, binds = []) execute_and_clear(sql, name, binds) { |result| result.cmd_tuples } end
Also aliased as: exec_update
exec_query(sql, name = "SQL", binds = [], prepare: false)
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# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 103 def exec_query(sql, name = "SQL", binds = [], prepare: false) execute_and_clear(sql, name, binds, prepare: prepare) do |result| types = {} fields = result.fields fields.each_with_index do |fname, i| ftype = result.ftype i fmod = result.fmod i types[fname] = get_oid_type(ftype, fmod, fname) end ActiveRecord::Result.new(fields, result.values, types) end end
exec_rollback_db_transaction()
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Aborts a transaction.
# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 149 def exec_rollback_db_transaction execute "ROLLBACK" end
execute(sql, name = nil)
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Executes an SQL statement, returning a PG::Result object on success or raising a PG::Error exception otherwise. Note: the PG::Result object is manually memory managed; if you don't need it specifically, you may want consider the exec_query
wrapper.
# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 87 def execute(sql, name = nil) if preventing_writes? && write_query?(sql) raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}" end materialize_transactions result = nil log(sql, name) do ActiveSupport::Dependencies.interlock.permit_concurrent_loads do result = execute_async_and_raise(sql) end end result end
explain(arel, binds = [])
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# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 9 def explain(arel, binds = []) sql = "EXPLAIN #{to_sql(arel, binds)}" Materialize::ExplainPrettyPrinter.new.pp(exec_query(sql, "EXPLAIN", binds)) end
Private Instance Methods
build_truncate_statements(table_names)
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# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 170 def build_truncate_statements(table_names) ["TRUNCATE TABLE #{table_names.map(&method(:quote_table_name)).join(", ")}"] end
execute_async_and_raise(sql)
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Known issue: PG::InternalError: ERROR: At least one input has no complete timestamps yet github.com/MaterializeInc/materialize/issues/2917
# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 156 def execute_async_and_raise(sql) @connection.async_exec(sql) rescue PG::InternalError => error if error.message.include? "At least one input has no complete timestamps yet" raise ::Materialize::Errors::IncompleteInput, error.message else raise end end
execute_batch(statements, name = nil)
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# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 166 def execute_batch(statements, name = nil) execute(combine_multi_statements(statements)) end
suppress_composite_primary_key(pk)
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# File lib/active_record/connection_adapters/materialize/database_statements.rb, line 174 def suppress_composite_primary_key(pk) pk unless pk.is_a?(Array) end