Improved time needed for clob-to-table conversion.

jgebal · jgebal · commit a0e98ed19f15 · 2019-06-16T19:39:35.000+01:00
Timing before change (with dbms_lob.read):
`clob_to_table - Took:+000000000 00:00:00.012957000`
After change:
`clob_to_table - Took:+000000000 00:00:00.001236000`
Speed improved by order of magnitude.
diff --git a/source/core/ut_utils.pkb b/source/core/ut_utils.pkb
@@ -241,7 +241,9 @@ create or replace package body ut_utils is
   begin
     while l_offset <= l_length loop
       l_amount := a_max_amount - coalesce( length(l_last_line), 0 );
-      dbms_lob.read(a_clob, l_amount, l_offset, l_buffer);
+--      dbms_lob.read(a_clob, l_amount, l_offset, l_buffer);
+      l_buffer := substr(a_clob, l_offset, l_amount);
+      l_amount := length(l_buffer);
       l_offset := l_offset + l_amount;
 
       l_string_results := string_to_table( l_last_line || l_buffer, a_delimiter, l_skip_leading_delimiter );
