Set asset pricing data column to null on updates from flow grpc (#562)

* set data column to null

* do not need it defined on insert

* add change log

CHANGELOG.md

@@ -46,6 +46,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * Docker images at tag `latest` for main branch merges [#551](https://github.com/provenance-io/explorer-service/pull/551)
 * Refactor account processing implementation to be more efficient [#552](https://github.com/provenance-io/explorer-service/issues/552)
 * Update keep alive times for flow api grpc calls [#558](https://github.com/provenance-io/explorer-service/pull/558)
+* Updates to asset pricing table will set data column to null [#562](https://github.com/provenance-io/explorer-service/pull/562)
 
 ### Bug Fixes
 

service/src/main/kotlin/io/provenance/explorer/domain/entities/Markers.kt

@@ -219,7 +219,7 @@ object AssetPricingTable : IdTable<Int>(name = "asset_pricing") {
     val pricing = decimal("pricing", 100, 50)
     val pricingDenom = varchar("pricing_denom", 256)
     val lastUpdated = datetime("last_updated")
-    val data = jsonb<AssetPricingTable, AssetPricing>("data", OBJECT_MAPPER)
+    val data = jsonb<AssetPricingTable, AssetPricing>("data", OBJECT_MAPPER).nullable()
 }
 
 class AssetPricingRecord(id: EntityID<Int>) : IntEntity(id) {
@@ -237,6 +237,7 @@ class AssetPricingRecord(id: EntityID<Int>) : IntEntity(id) {
             findUnique(markerDenom, pricingDenom)?.apply {
                 this.pricing = pricingAmount
                 this.lastUpdated = timestamp
+                this.data = null
             } ?: AssetPricingTable.insert {
                 it[this.markerId] = markerId
                 it[this.markerAddress] = markerAddress ?: ""