Source Postgres : Fast query for estimate messages

airbyte-config/init/src/main/resources/seed/source_definitions.yaml

@@ -1338,7 +1338,7 @@
 - name: Postgres
   sourceDefinitionId: decd338e-5647-4c0b-adf4-da0e75f5a750
   dockerRepository: airbyte/source-postgres
-  dockerImageTag: 1.0.38
+  dockerImageTag: 1.0.39
   documentationUrl: https://docs.airbyte.com/integrations/sources/postgres
   icon: postgresql.svg
   sourceType: database

airbyte-config/init/src/main/resources/seed/source_specs.yaml

@@ -11476,7 +11476,7 @@
     supportsNormalization: false
     supportsDBT: false
     supported_destination_sync_modes: []
-- dockerImage: "airbyte/source-postgres:1.0.38"
+- dockerImage: "airbyte/source-postgres:1.0.39"
   spec:
     documentationUrl: "https://docs.airbyte.com/integrations/sources/postgres"
     connectionSpecification:

airbyte-integrations/connectors/source-postgres-strict-encrypt/Dockerfile

@@ -16,5 +16,5 @@ ENV APPLICATION source-postgres-strict-encrypt
 
 COPY --from=build /airbyte /airbyte
 
-LABEL io.airbyte.version=1.0.38
+LABEL io.airbyte.version=1.0.39
 LABEL io.airbyte.name=airbyte/source-postgres-strict-encrypt

airbyte-integrations/connectors/source-postgres/Dockerfile

@@ -16,5 +16,5 @@ ENV APPLICATION source-postgres
 
 COPY --from=build /airbyte /airbyte
 
-LABEL io.airbyte.version=1.0.38
+LABEL io.airbyte.version=1.0.39
 LABEL io.airbyte.name=airbyte/source-postgres

airbyte-integrations/connectors/source-postgres/src/main/java/io/airbyte/integrations/source/postgres/PostgresQueryUtils.java

@@ -26,7 +26,7 @@ public class PostgresQueryUtils {
 
   public static final String TABLE_ESTIMATE_QUERY =
       """
-            SELECT (SELECT COUNT(*) FROM %s) AS %s,
+            SELECT (select reltuples::int8 as count from pg_class c JOIN pg_catalog.pg_namespace n ON n.oid=c.relnamespace where nspname='%s' AND relname='%s') AS %s,
             pg_relation_size('%s') AS %s;
       """;
 

airbyte-integrations/connectors/source-postgres/src/main/java/io/airbyte/integrations/source/postgres/PostgresSource.java

@@ -557,13 +557,20 @@ protected void estimateFullRefreshSyncSize(final JdbcDatabase database,
       final String fullTableName =
           getFullyQualifiedTableNameWithQuoting(schemaName, tableName, getQuoteString());
 
-      final List<JsonNode> tableEstimateResult = getFullTableEstimate(database, fullTableName);
+      final List<JsonNode> tableEstimateResult = getFullTableEstimate(database, fullTableName, schemaName, tableName);
 
       if (!tableEstimateResult.isEmpty() && tableEstimateResult.get(0).has(ROW_COUNT_RESULT_COL) &&
           tableEstimateResult.get(0).has(TOTAL_BYTES_RESULT_COL)) {
         final long syncRowCount = tableEstimateResult.get(0).get(ROW_COUNT_RESULT_COL).asLong();
         final long syncByteCount = tableEstimateResult.get(0).get(TOTAL_BYTES_RESULT_COL).asLong();
 
+        // The fast count query can return negative or otherwise invalid results for small tables. In this
+        // case, we can skip emitting an
+        // estimate trace altogether since the sync will likely complete quickly.
+        if (syncRowCount <= 0) {
+          return;
+        }
+
         // Here, we double the bytes estimate to account for serialization. Perhaps a better way to do this
         // is to
         // read a row and Stringify it to better understand the accurate volume of data sent over the wire.
@@ -588,20 +595,23 @@ protected void estimateIncrementalSyncSize(final JdbcDatabase database,
       final String fullTableName =
           getFullyQualifiedTableNameWithQuoting(schemaName, tableName, getQuoteString());
 
-      final List<JsonNode> tableEstimateResult = getFullTableEstimate(database, fullTableName);
+      final List<JsonNode> tableEstimateResult = getFullTableEstimate(database, fullTableName, schemaName, tableName);
 
       final long tableRowCount = tableEstimateResult.get(0).get(ROW_COUNT_RESULT_COL).asLong();
       final long tableByteCount = tableEstimateResult.get(0).get(TOTAL_BYTES_RESULT_COL).asLong();
 
+      // The fast count query can return negative or otherwise invalid results for small tables. In this
+      // case, we can skip emitting an
+      // estimate trace altogether since the sync will likely complete quickly.
+      if (tableRowCount <= 0) {
+        return;
+      }
+
       final long syncRowCount;
       final long syncByteCount;
 
       syncRowCount = getIncrementalTableRowCount(database, fullTableName, cursorInfo, cursorFieldType);
-      if (tableRowCount == 0) {
-        syncByteCount = 0;
-      } else {
-        syncByteCount = (tableByteCount / tableRowCount) * syncRowCount;
-      }
+      syncByteCount = (tableByteCount / tableRowCount) * syncRowCount;
 
       // Here, we double the bytes estimate to account for serialization. Perhaps a better way to do this
       // is to
@@ -615,10 +625,14 @@ protected void estimateIncrementalSyncSize(final JdbcDatabase database,
     }
   }
 
-  private List<JsonNode> getFullTableEstimate(final JdbcDatabase database, final String fullTableName) throws SQLException {
+  private List<JsonNode> getFullTableEstimate(final JdbcDatabase database,
+                                              final String fullTableName,
+                                              final String schemaName,
+                                              final String tableName)
+      throws SQLException {
     // Construct the table estimate query.
     final String tableEstimateQuery =
-        String.format(TABLE_ESTIMATE_QUERY, fullTableName, ROW_COUNT_RESULT_COL, fullTableName, TOTAL_BYTES_RESULT_COL);
+        String.format(TABLE_ESTIMATE_QUERY, schemaName, tableName, ROW_COUNT_RESULT_COL, fullTableName, TOTAL_BYTES_RESULT_COL);
     LOGGER.debug("table estimate query: {}", tableEstimateQuery);
     final List<JsonNode> jsonNodes = database.bufferedResultSetQuery(conn -> conn.createStatement().executeQuery(tableEstimateQuery),
         resultSet -> JdbcUtils.getDefaultSourceOperations().rowToJson(resultSet));