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Add PgxScanner interface

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Enables types to support database/sql at the same time as pgx.

fixes #232
This commit is contained in:
Jack Christensen
2017-02-02 20:20:31 -06:00
parent 63e482f6bc
commit a52a6bd555
6 changed files with 90 additions and 7 deletions
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doc.go
+6 -5
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@@ -157,14 +157,15 @@ Custom Type Support
pgx includes support for the common data types like integers, floats, strings,
dates, and times that have direct mappings between Go and SQL. Support can be
added for additional types like point, hstore, numeric, etc. that do not have
direct mappings in Go by the types implementing Scanner and Encoder.
direct mappings in Go by the types implementing ScannerPgx and Encoder.
Custom types can support text or binary formats. Binary format can provide a
large performance increase. The natural place for deciding the format for a
value would be in Scanner as it is responsible for decoding the returned data.
However, that is impossible as the query has already been sent by the time the
Scanner is invoked. The solution to this is the global DefaultTypeFormats. If a
custom type prefers binary format it should register it there.
value would be in ScannerPgx as it is responsible for decoding the returned
data. However, that is impossible as the query has already been sent by the time
the ScannerPgx is invoked. The solution to this is the global
DefaultTypeFormats. If a custom type prefers binary format it should register it
there.
pgx.DefaultTypeFormats["point"] = pgx.BinaryFormatCode