diff --git a/statediff/indexer/database/dump/indexer.go b/statediff/indexer/database/dump/indexer.go
index 5d9fb1c05..15a541b9c 100644
--- a/statediff/indexer/database/dump/indexer.go
+++ b/statediff/indexer/database/dump/indexer.go
@@ -500,3 +500,7 @@ func (sdi *StateDiffIndexer) Close() error {
 func (sdi *StateDiffIndexer) PushKnownGaps(startingBlockNumber *big.Int, endingBlockNumber *big.Int, checkedOut bool, processingKey int64) error {
 	return nil
 }
+
+func (sdi *StateDiffIndexer) QueryDb(queryString string) (string, error) {
+	return "", nil
+}
diff --git a/statediff/indexer/database/file/indexer.go b/statediff/indexer/database/file/indexer.go
index 9b7b2c00d..949aac6d1 100644
--- a/statediff/indexer/database/file/indexer.go
+++ b/statediff/indexer/database/file/indexer.go
@@ -482,3 +482,7 @@ func (sdi *StateDiffIndexer) Close() error {
 func (sdi *StateDiffIndexer) PushKnownGaps(startingBlockNumber *big.Int, endingBlockNumber *big.Int, checkedOut bool, processingKey int64) error {
 	return nil
 }
+
+func (sdi *StateDiffIndexer) QueryDb(queryString string) (string, error) {
+	return "", nil
+}
diff --git a/statediff/indexer/database/sql/indexer.go b/statediff/indexer/database/sql/indexer.go
index 512d7f772..275f8f303 100644
--- a/statediff/indexer/database/sql/indexer.go
+++ b/statediff/indexer/database/sql/indexer.go
@@ -554,7 +554,7 @@ func (sdi *StateDiffIndexer) Close() error {
 	return sdi.dbWriter.Close()
 }
 
-// CLEAN UP!!
+// Update the known gaps table with the gap information.
 func (sdi *StateDiffIndexer) PushKnownGaps(startingBlockNumber *big.Int, endingBlockNumber *big.Int, checkedOut bool, processingKey int64) error {
 	knownGap := models.KnownGapsModel{
 		StartingBlockNumber: startingBlockNumber.String(),
@@ -567,3 +567,16 @@ func (sdi *StateDiffIndexer) PushKnownGaps(startingBlockNumber *big.Int, endingB
 	}
 	return nil
 }
+
+// This is a simple wrapper function which will run QueryRow on the DB
+func (sdi *StateDiffIndexer) QueryDb(queryString string) (string, error) {
+	var name string
+	err := sdi.dbWriter.db.QueryRow(context.Background(), queryString).Scan(&name)
+	// err := sdi.dbWriter.db.QueryRow(context.Background(), "SELECT ename FROM emp ORDER BY sal DESC LIMIT 1;").Scan(&name)
+	if err != nil {
+		return "", err
+	}
+	fmt.Println(name)
+
+	return name, nil
+}
diff --git a/statediff/indexer/database/sql/mainnet_tests/indexer_test.go b/statediff/indexer/database/sql/mainnet_tests/indexer_test.go
index 02e6c86cf..b75ea1b7b 100644
--- a/statediff/indexer/database/sql/mainnet_tests/indexer_test.go
+++ b/statediff/indexer/database/sql/mainnet_tests/indexer_test.go
@@ -118,22 +118,28 @@ func tearDown(t *testing.T) {
 }
 
 func TestKnownGapsUpsert(t *testing.T) {
-	var blockNumber int64 = 111
-	startBlock := big.NewInt(blockNumber)
-	endBlock := big.NewInt(blockNumber + 10)
-
+	var startBlockNumber int64 = 111
+	var endBlockNumber int64 = 121
 	ind, err := setupDb(t)
 	if err != nil {
 		t.Fatal(err)
 	}
 	require.NoError(t, err)
 
+	testKnownGapsUpsert(t, startBlockNumber, endBlockNumber, ind)
+	//str, err := ind.QueryDb("SELECT MAX(block_number) FROM eth.header_cids") // Figure out the string.
+	queryString := fmt.Sprintf("SELECT starting_block_number from eth.known_gaps WHERE starting_block_number = %d AND ending_block_number = %d", startBlockNumber, endBlockNumber)
+	_, queryErr := ind.QueryDb(queryString) // Figure out the string.
+	require.NoError(t, queryErr)
+
+}
+func testKnownGapsUpsert(t *testing.T, startBlockNumber int64, endBlockNumber int64, ind interfaces.StateDiffIndexer) {
+	startBlock := big.NewInt(startBlockNumber)
+	endBlock := big.NewInt(endBlockNumber)
+
 	processGapError := ind.PushKnownGaps(startBlock, endBlock, false, 1)
 	if processGapError != nil {
 		t.Fatal(processGapError)
 	}
-
-	// Read data from the database!
-	// And compare
 	require.NoError(t, processGapError)
 }
diff --git a/statediff/indexer/database/sql/postgres/database.go b/statediff/indexer/database/sql/postgres/database.go
index 4b6f74cf5..33bfa9757 100644
--- a/statediff/indexer/database/sql/postgres/database.go
+++ b/statediff/indexer/database/sql/postgres/database.go
@@ -101,7 +101,8 @@ func (db *DB) InsertIPLDsStm() string {
 	return `INSERT INTO public.blocks (key, data) VALUES (unnest($1::TEXT[]), unnest($2::BYTEA[])) ON CONFLICT (key) DO NOTHING`
 }
 
+// InsertKnownGapsStm satisfies the sql.Statements interface
 func (db *DB) InsertKnownGapsStm() string {
-	return `INSERT INTO eth.known_gaps (starting_block_number, ending_block_number, checked_out, processing_key) VALUES ($1, $2, $3, $4)`
+	return `INSERT INTO eth.known_gaps (starting_block_number, ending_block_number, checked_out, processing_key) VALUES ($1, $2, $3, $4) ON CONFLICT (starting_block_number) DO NOTHING`
 	//return `INSERT INTO eth.known_gaps (starting_block_number, ending_block_number, checked_out, processing_key) VALUES (1, 2, true, 1)`
 }
diff --git a/statediff/indexer/database/sql/writer.go b/statediff/indexer/database/sql/writer.go
index ff06a424a..34ea5bbfc 100644
--- a/statediff/indexer/database/sql/writer.go
+++ b/statediff/indexer/database/sql/writer.go
@@ -184,6 +184,8 @@ func (w *Writer) upsertStorageCID(tx Tx, storageCID models.StorageNodeModel) err
 	return nil
 }
 
+// Upserts known gaps to the DB.
+// INSERT INTO eth.known_gaps (starting_block_number, ending_block_number, checked_out, processing_key) VALUES ($1, $2, $3, $4)
 func (w *Writer) upsertKnownGaps(knownGaps models.KnownGapsModel) error {
 	_, err := w.db.Exec(context.Background(), w.db.InsertKnownGapsStm(),
 		knownGaps.StartingBlockNumber, knownGaps.EndingBlockNumber, knownGaps.CheckedOut, knownGaps.ProcessingKey)
diff --git a/statediff/indexer/interfaces/interfaces.go b/statediff/indexer/interfaces/interfaces.go
index bf87c7f9a..62123418c 100644
--- a/statediff/indexer/interfaces/interfaces.go
+++ b/statediff/indexer/interfaces/interfaces.go
@@ -33,6 +33,7 @@ type StateDiffIndexer interface {
 	PushCodeAndCodeHash(tx Batch, codeAndCodeHash sdtypes.CodeAndCodeHash) error
 	ReportDBMetrics(delay time.Duration, quit <-chan bool)
 	PushKnownGaps(startingBlockNumber *big.Int, endingBlockNumber *big.Int, checkedOut bool, processingKey int64) error
+	QueryDb(queryString string) (string, error)
 	io.Closer
 }