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cadc-tap-server-pg: Update README.md #185

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cadc-tap-server-pg: Update README.md #185

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15 changes: 13 additions & 2 deletions cadc-tap-server-pg/README.md
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# cadc-tap-server-pg 1.0.0

Offers PostgreSQL support to handle datatype conversions in ADQL.
Offers PostgreSQL support to handle datatype conversions and ADQL
transformations for a PostgreSQL+pgsphere backend database.

See [the example](example) for a sample implementation.
The `ca.nrc.cadc.tap.pg.PostgresDataTypeMapper` extends the default `BasicDataTypeMapper`
with pg+phsphere specific datatype support.

The `ca.nrc.cadc.tap.writer.format` package provides a FormatFactory and Format implementations
to support pg+phsphere specific datatypes.

The `ca.nrc.cadc.tap.parser` package provides various extensions of the `cadc-adql` ADQL
parser to support pg+phsphere specific ADQL transformations.

## example usage
The `youcat` TAP service makes use of all the features of this library.
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