feat: basic firebird analyser

plugins/dbgate-plugin-firebird/src/backend/helpers.js

@@ -0,0 +1,54 @@
+function getDataTypeString(column) {
+  if (!column) {
+    return null;
+  }
+  const { DATATYPECODE, SCALE, LENGTH, NUMBERPRECISION } = column;
+
+  switch (DATATYPECODE) {
+    case 7:
+      return 'SMALLINT';
+
+    case 8:
+      return 'INTEGER';
+
+    case 9:
+      return 'BIGINT';
+
+    case 10:
+      return 'FLOAT';
+
+    case 11:
+      return 'DOUBLE PRECISION';
+
+    case 12:
+      return 'DATE';
+
+    case 13:
+      return 'TIME';
+
+    case 14:
+      return `CHAR(${LENGTH})`;
+
+    case 16:
+      return `DECIMAL(${NUMBERPRECISION}, ${SCALE})`;
+
+    case 27:
+      return 'DOUBLE PRECISION';
+
+    case 35:
+      return 'BLOB';
+
+    case 37:
+      return `VARCHAR(${LENGTH})`;
+
+    case 261:
+      return 'CSTRING';
+
+    default:
+      return `UNKNOWN (${DATATYPECODE})`;
+  }
+}
+
+module.exports = {
+  getDataTypeString,
+};