Patch for BUG#30736: Row Size Too Large Error Creating a Table and

Inserting Data.

The problem was that under some circumstances Field class was not
properly initialized before calling create_length_to_internal_length()
function, which led to assert failure.

The fix is to do the proper initialization.

The user-visible problem was that under some circumstances
CREATE TABLE ... SELECT statement crashed the server or led
to wrong error message (wrong results).


mysql-test/r/select.result:
  Update result file.
mysql-test/t/select.test:
  Add a test case for BUG#30736: Row Size Too Large Error
  Creating a Table and Inserting Data.
sql/sql_table.cc:
  Move sql_field->decimals initialization before
  sql_field->create_length_to_internal_length() call.

1 files changed, 35 insertions, 0 deletions

diff --git a/mysql-test/r/select.result b/mysql-test/r/select.result
index ed120a1bbb8..76022053702 100644
--- a/mysql-test/r/select.result
+++ b/mysql-test/r/select.result
@@ -4096,4 +4096,39 @@ SELECT `x` FROM v3;
 x
 1
 DROP VIEW v1, v2, v3;
+
+#
+# Bug#30736: Row Size Too Large Error Creating a Table and
+# Inserting Data.
+#
+DROP TABLE IF EXISTS t1;
+DROP TABLE IF EXISTS t2;
+
+CREATE TABLE t1(
+c1 DECIMAL(10, 2),
+c2 FLOAT);
+
+INSERT INTO t1 VALUES (0, 1), (2, 3), (4, 5);
+
+CREATE TABLE t2(
+c3 DECIMAL(10, 2))
+SELECT
+c1 * c2 AS c3
+FROM t1;
+
+SELECT * FROM t1;
+c1	c2
+0.00	1
+2.00	3
+4.00	5
+
+SELECT * FROM t2;
+c3
+0.00
+6.00
+20.00
+
+DROP TABLE t1;
+DROP TABLE t2;
+
 End of 5.0 tests