Index: trunk/ippTools/src/difftool.c
===================================================================
--- trunk/ippTools/src/difftool.c	(revision 21402)
+++ trunk/ippTools/src/difftool.c	(revision 23310)
@@ -45,4 +45,6 @@
 static bool donecleanupMode(pxConfig *config);
 static bool updatediffskyfileMode(pxConfig *config);
+static bool exportrunMode(pxConfig *config);
+static bool importrunMode(pxConfig *config);
 
 static bool setdiffRunState(pxConfig *config, psS64 diff_id, const char *state);
@@ -81,4 +83,6 @@
         MODECASE(DIFFTOOL_MODE_DONECLEANUP,           donecleanupMode);
         MODECASE(DIFFTOOL_MODE_UPDATEDIFFSKYFILE,     updatediffskyfileMode);
+        MODECASE(DIFFTOOL_MODE_EXPORTRUN,             exportrunMode);
+        MODECASE(DIFFTOOL_MODE_IMPORTRUN,             importrunMode);
         default:
             psAbort("invalid option (this should not happen)");
@@ -1437,2 +1441,150 @@
 }
 
+bool exportrunMode(pxConfig *config)
+{
+  typedef struct ExportTable {
+    char tableName[80];
+    char sqlFilename[80];
+  } ExportTable;
+  
+  int numExportFiles = 3;
+
+  PS_ASSERT_PTR_NON_NULL(config, NULL);
+
+  PXOPT_LOOKUP_S64(det_id, config->args, "-diff_id", true,  false);
+  PXOPT_LOOKUP_STR(outfile, config->args, "-outfile", true,  false);
+  PXOPT_LOOKUP_U64(limit,   config->args, "-limit",   false, false);
+
+  FILE *f = fopen (outfile, "w");
+  if (f == NULL) {
+    psError(PS_ERR_UNKNOWN, false, "failed to open output file");
+    return false;
+  }
+
+  psMetadata *where = psMetadataAlloc();
+  PXOPT_COPY_S64(config->args, where, "-diff_id", "diff_id", "==");
+
+  ExportTable tables [] = {
+    {"diffRun", "difftool_export_run.sql"},
+    {"diffInputSkyfile", "difftool_export_input_skyfile.sql"},
+    {"diffSkyfile", "difftool_export_skyfile.sql"},
+  };
+
+  for (int i=0; i < numExportFiles; i++) {
+    psString query = pxDataGet(tables[i].sqlFilename);
+    if (!query) {
+      psError(PXTOOLS_ERR_DATA, false, "failed to retreive SQL statement");
+      return false;
+    }
+
+    if (where && psListLength(where->list)) {
+      psString whereClause = psDBGenerateWhereSQL(where, NULL);
+      psStringAppend(&query, " %s", whereClause);
+      psFree(whereClause);
+    }
+
+    // treat limit == 0 as "no limit"
+    if (limit) {
+      psString limitString = psDBGenerateLimitSQL(limit);
+      psStringAppend(&query, " %s", limitString);
+      psFree(limitString);
+    }
+
+    if (!p_psDBRunQuery(config->dbh, query)) {
+      psError(PS_ERR_UNKNOWN, false, "database error");
+      psFree(query);
+      return false;
+    }
+    psFree(query);
+
+    psArray *output = p_psDBFetchResult(config->dbh);
+    if (!output) {
+      psError(PS_ERR_UNKNOWN, false, "database error");
+      return false;
+    }
+    if (!psArrayLength(output)) {
+      psTrace("regtool", PS_LOG_INFO, "no rows found");
+      psFree(output);
+      return true;
+    }
+
+    // we must write the export table in non-simple (true) format
+    if (!ippdbPrintMetadatas(f, output, tables[i].tableName, true)) {
+      psError(PS_ERR_UNKNOWN, false, "failed to print array");
+      psFree(output);
+      return false;
+    }
+    psFree(output);
+  }
+
+  fclose (f);
+
+  return true;
+}
+
+bool importrunMode(pxConfig *config)
+{
+  unsigned int nFail;
+  
+  int numImportTables = 2;
+  
+  char tables[2] [80] = {"diffInputSkyfile", "diffSkyfile"};
+
+  PS_ASSERT_PTR_NON_NULL(config, NULL);
+  
+  PXOPT_LOOKUP_STR(infile, config->args, "-infile", true,  false);
+
+  psMetadata *input = psMetadataConfigRead (NULL, &nFail, infile, false);
+
+  fprintf (stdout, "---- input ----\n");
+  psMetadataPrint (stderr, input, 1);
+
+  psMetadataItem *item = psMetadataLookup (input, "diffRun");
+  psAssert (item, "entry not in input?");
+  psAssert (item->type == PS_DATA_METADATA_MULTI, "entry not multi?");
+
+  psMetadataItem *entry = psListGet (item->data.list, 0);
+  assert (entry);
+  assert (entry->type == PS_DATA_METADATA);
+  diffRunRow *diffRun = diffRunObjectFromMetadata (entry->data.md);
+  diffRunInsertObject (config->dbh, diffRun);
+
+  // fprintf (stdout, "---- diff run ----\n");
+  // psMetadataPrint (stderr, entry->data.md, 1);
+
+  for (int i = 0; i < numImportTables; i++) {
+    item = psMetadataLookup (input, tables[i]);
+    psAssert (item, "entry not in input?");
+    psAssert (item->type == PS_DATA_METADATA_MULTI, "entry not multi?");
+  
+    switch (i) {
+      case 0:
+        for (int i = 0; i < item->data.list->n; i++) {
+          entry = psListGet (item->data.list, i);
+          assert (entry);
+          assert (entry->type == PS_DATA_METADATA);
+          diffInputSkyfileRow *diffInputSkyfile = diffInputSkyfileObjectFromMetadata (entry->data.md);
+          diffInputSkyfileInsertObject (config->dbh, diffInputSkyfile);
+
+          // fprintf (stdout, "---- row %d ----\n", i);
+          // psMetadataPrint (stderr, entry->data.md, 1);
+        }
+        break;
+        
+      case 1:
+        for (int i = 0; i < item->data.list->n; i++) {
+          entry = psListGet (item->data.list, i);
+          assert (entry);
+          assert (entry->type == PS_DATA_METADATA);
+          diffSkyfileRow *diffSkyfile = diffSkyfileObjectFromMetadata (entry->data.md);
+          diffSkyfileInsertObject (config->dbh, diffSkyfile);
+
+          // fprintf (stdout, "---- row %d ----\n", i);
+          // psMetadataPrint (stderr, entry->data.md, 1);
+        }
+        break;
+    }
+  }
+
+  return true;
+}