String getSchemaNameFromMetaData(DatabaseMetaData metaData, RegionMapping regionMapping,
      String catalogFilter) throws SQLException {
    String schemaFilter = regionMapping.getSchema();
    if (schemaFilter == null || schemaFilter.isEmpty()) {
      if ("PostgreSQL".equals(metaData.getDatabaseProductName())) {
        schemaFilter = "public";
      } else {
        return DEFAULT_SCHEMA;
      }
    }
    try (ResultSet schemas = metaData.getSchemas(catalogFilter, "%")) {
      return findMatchInResultSet(schemaFilter, schemas, "TABLE_SCHEM", "schema");
    }
  }
If the region mapping has been given a table name then return it.
Otherwise return the region mapping's region name as the table name.
geode-connectors/src/main/java/org/apache/geode/connectors/jdbc/internal/TableMetaDataManager.java