feat(db): update Clickhouse type handling for boolean and add checksum function for boolean fields

Author: flarco

cmd/sling/sling_test.go

@@ -871,14 +871,14 @@ func runOneTask(t *testing.T, file g.FileItem, connType dbio.Type) {
 					correctType = iop.DatetimeType // clickhouse uses datetime
 				}
 				if correctType == iop.BoolType {
-					correctType = iop.TextType // clickhouse doesn't have bool
+					correctType = iop.IntegerType // clickhouse bool is integer
 				}
 				if correctType == iop.JsonType {
 					correctType = iop.TextType // clickhouse uses varchar(max) for json
 				}
 			case srcType == dbio.TypeDbClickhouse && tgtType == dbio.TypeDbPostgres:
 				if correctType == iop.BoolType {
-					correctType = iop.TextType // clickhouse doesn't have bool
+					correctType = iop.IntegerType //  clickhouse bool is integer
 				}
 				if correctType == iop.JsonType {
 					correctType = iop.TextType // clickhouse uses varchar(max) for json

core/dbio/templates/clickhouse.yaml

@@ -262,6 +262,7 @@ function:
   checksum_datetime: toUnixTimestamp64Nano(toDateTime64({field}, 6)) / 1000
   # checksum_datetime: toUnixTimestamp64Nano(toDateTime64({field}, 6)) / 1000
   checksum_decimal: ABS(CAST({field} as Nullable(Int64)))
+  checksum_boolean: length(case when {field} is null then '' when {field} > 0 then 'true' else 'false' end)
   now: now()
   cast_to_string: 'toString({field})'