Implements TRANSACTION_TAG and STATEMENT_TAG system variables #76
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This PR implements
TRANSACTION_TAG
andSTATEMENT_TAG
.STATEMENT_TAG
should beREQUEST_TAG
, but I have prioritized to be Spanner JDBC driver compatibility.BEGIN RW TAG <tag>
andBEGIN RO TAG <tag>
.Breaking changes
BEGIN RW TAG <tag>
andBEGIN RO TAG <tag>
are no longer supported.References