[CALCITE-5614] Allow serializing + deserializing Sarg #31
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This allows dependent projects to run tests using Bazel. (Previously, DiffRepository would give errors because Bazel has packaged the .xml files it needs inside JAR files.) Close apache#2750
Related to CALCITE-5346.
Previously we relied on the parser to map unrecognized datatypes to a known type using SqlAlienSystemTypeNameSpec. This worked but made it difficult to change or add new types as necessary. One would have to update at least 3 different parsers (babel, core, server) to make a change.
This change allows for declaring user-defined types at the root of a schema model and allows for easy type alias mapping. These data types are shared by all schema in the model so cast and DDL expressions do not need to scope data type references to a particular sub-schema.
For example:
```
inline: {
version: '1.0',
types: [
{
name: 'BOOL',
type: 'BOOLEAN'
},
{
name: 'BYTES',
type: 'VARBINARY'
},
...
],
```
Allows for `CAST("true" as BOOL)`
…ME, TIMESTAMP, DATETIME (apache#27)
…de node) (apache#28) * Add tests to fix later * Update test * Add in type field to RelJson.toJson and update tests * CALCITE-5607 / Serialize return type during RelJson.toJson(RexNode node) * Update test comment --------- Co-authored-by: Oliver Lee <oliverlee@google.com>
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