[FLINK-25230] Harden type serialization in JSON plan

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.15.0
• Component/s: Table SQL / Planner
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Timo Walther
• Created: 09/Dec/21 08:25
• Updated: 14/Jan/22 08:15
• Resolved: 14/Jan/22 08:15

Description

1. Introduce two representations for LogicalType

Compact one (using asSerializableString):

// compact one
outputType: "ROW<i INT, s VARCHAR(2147483647)>"

// full one for all kinds of logical types (time attributes, char(0), inline structured, etc.)
outputType: {
  "root" : "ROW",
  "nullable" : true,
  "fields" : [ {
    "i" : "INT"
  }, {
    "s" : "VARCHAR(2147483647)"
  }]
}

2. Drop support of legacy types and symbol classes which should not be part of the plan

3. Rework DataView support (shorten, remove concrete classes, support any external type in accumulators)

4. Implement a DataTypeJsonDeSerializer

5. Replace RelDataTypeJsonDeSerializer with LogicalTypeJsonDeSerializer

Issue Links

• links to: GitHub Pull Request #18274
• links to: GitHub Pull Request #18342