Unit msepqconnection

Description
Classes, Interfaces, Objects and Records
Types
Constants

Description

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Overview

Classes, Interfaces, Objects and Records

Name Description
Class tmsepqconnection Postgres differs from Firebird in ways relevant to MSEgui: there is no native CommitRetaining, MSEgui simulates it by opening a new transaction without refreshing the datasets; there are no named transactions, every transaction has its own connection; blobs are fetched with the record (not on demand, see bdo_cacheblobs); and a failed statement aborts the whole transaction (a rollback is required to continue) — pqco_usesavepoint masks this by wrapping every statement in a SAVEPOINT, at the cost of an extra round-trip per statement.

Types

pqconnectionoptionty = (...);
pqconnectionoptionsty = set of pqconnectionoptionty;

Constants

defaultpqconnectionoptionsty = [pqco_usesavepoint];

Description

Types

pqconnectionoptionty = (...);

pqco_usesavepoint (set by default) wraps every executed statement in a SAVEPOINT/RELEASE SAVEPOINT, rolling back to the savepoint on failure, so a single failed statement does not abort the whole Postgres transaction — at the cost of an extra round-trip per statement. pqco_closetransactiononfail closes the transaction on a failed statement instead.

Values
  • pqco_usesavepoint
  • pqco_closetransactiononfail
pqconnectionoptionsty = set of pqconnectionoptionty;

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Constants

defaultpqconnectionoptionsty = [pqco_usesavepoint];

This item has no description.

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