Remove maxrows from candidate query to fix BoxLang+Postgres

BoxLang throws when setMaxRows() is called on a PostgreSQL JDBC
PreparedStatement with certain parameter combinations. The for-loop
already exits on the first successful claim, so maxrows is unnecessary.

Also cleans up diagnostic code from the test.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: bpamiri

vendor/wheels/JobWorker.cfc

@@ -55,9 +55,12 @@ component {
 
 		local.sql &= " ORDER BY priority DESC, runAt ASC";
 
-		// Fetch a small batch of candidates for optimistic locking
+		// Fetch candidates for optimistic locking.
+		// NOTE: Avoid maxrows option — BoxLang + PostgreSQL throws when setMaxRows()
+		// is called on the JDBC PreparedStatement with certain parameter combinations.
+		// The for-loop below processes only the first successful claim anyway.
 		try {
-			local.candidates = queryExecute(local.sql, local.params, {datasource = variables.$datasource, maxrows = 5});
+			local.candidates = queryExecute(local.sql, local.params, {datasource = variables.$datasource});
 		} catch (any e) {
 			$ensureJobTable();
 			local.result.skipped = true;

vendor/wheels/tests/specs/jobs/JobWorkerSpec.cfc

@@ -73,64 +73,12 @@ component extends="wheels.WheelsTest" {
 				expect(local.enqueued).toHaveKey("persisted");
 				expect(local.enqueued.persisted).toBeTrue();
 
-				// Diagnostic: test candidate query pieces to isolate BoxLang+Postgres issue
-				local.now = CreateDateTime(Year(Now()), Month(Now()), Day(Now()), Hour(Now()), Minute(Now()), Second(Now()));
-				local.diag = "";
-
-				// Test A: full candidate query WITH maxrows (same as processNext)
-				try {
-					local.qA = queryExecute(
-						"SELECT id FROM wheels_jobs WHERE status = 'pending' AND runAt <= :runAt AND queue IN (:queue1) ORDER BY priority DESC, runAt ASC",
-						{runAt = {value = local.now, cfsqltype = "cf_sql_timestamp"}, queue1 = {value = "test_claim", cfsqltype = "cf_sql_varchar"}},
-						{datasource = application.wheels.dataSourceName, maxrows = 5}
-					);
-					local.diag &= "A=#local.qA.recordCount#";
-				} catch (any eA) {
-					local.diag &= "A=ERR:#Left(eA.message, 100)#";
-				}
-
-				// Test B: same query WITHOUT maxrows
-				try {
-					local.qB = queryExecute(
-						"SELECT id FROM wheels_jobs WHERE status = 'pending' AND runAt <= :runAt AND queue IN (:queue1) ORDER BY priority DESC, runAt ASC",
-						{runAt = {value = local.now, cfsqltype = "cf_sql_timestamp"}, queue1 = {value = "test_claim", cfsqltype = "cf_sql_varchar"}},
-						{datasource = application.wheels.dataSourceName}
-					);
-					local.diag &= ", B=#local.qB.recordCount#";
-				} catch (any eB) {
-					local.diag &= ", B=ERR:#Left(eB.message, 100)#";
-				}
-
-				// Test C: without IN clause, use direct = comparison
-				try {
-					local.qC = queryExecute(
-						"SELECT id FROM wheels_jobs WHERE status = 'pending' AND runAt <= :runAt AND queue = :queue1",
-						{runAt = {value = local.now, cfsqltype = "cf_sql_timestamp"}, queue1 = {value = "test_claim", cfsqltype = "cf_sql_varchar"}},
-						{datasource = application.wheels.dataSourceName}
-					);
-					local.diag &= ", C=#local.qC.recordCount#";
-				} catch (any eC) {
-					local.diag &= ", C=ERR:#Left(eC.message, 100)#";
-				}
-
-				// Test D: without timestamp param comparison
-				try {
-					local.qD = queryExecute(
-						"SELECT id FROM wheels_jobs WHERE status = 'pending' AND queue = :queue1",
-						{queue1 = {value = "test_claim", cfsqltype = "cf_sql_varchar"}},
-						{datasource = application.wheels.dataSourceName}
-					);
-					local.diag &= ", D=#local.qD.recordCount#";
-				} catch (any eD) {
-					local.diag &= ", D=ERR:#Left(eD.message, 100)#";
-				}
-
 				// Process it
 				local.worker = new wheels.JobWorker();
 				local.result = local.worker.processNext(queues = "test_claim");
 
 				// Job was processed (may succeed or fail depending on job class)
-				expect(local.result.skipped).toBeFalse(local.diag);
+				expect(local.result.skipped).toBeFalse();
 				expect(Len(local.result.jobId)).toBeGT(0);
 			});