1 files changed, 9 insertions, 0 deletions
diff --git a/src/s3select/example/expr_genrator.py b/src/s3select/example/expr_genrator.py
new file mode 100755
index 000000000..5905e9832
--- /dev/null
+++ b/src/s3select/example/expr_genrator.py
@@ -0,0 +1,9 @@
+import random
+import sys
+
+def expr(depth):
+    if depth==1 or random.random()<1.0/(2**depth-1): 
+        return str(int(random.random() * 100) + 1)+".0"
+    return '(' + expr(depth-1) + random.choice(['+','-','*','/']) + expr(depth-1) + ')'
+
+print (expr( int(sys.argv[1]) ))