diff options
| -rw-r--r-- | mysql-test/main/column_compression.result | 16 | ||||
| -rw-r--r-- | mysql-test/main/column_compression.test | 16 | ||||
| -rw-r--r-- | sql/field.h | 6 |
3 files changed, 37 insertions, 1 deletions
diff --git a/mysql-test/main/column_compression.result b/mysql-test/main/column_compression.result index c521a208589..f4eb0461ed3 100644 --- a/mysql-test/main/column_compression.result +++ b/mysql-test/main/column_compression.result @@ -1403,3 +1403,19 @@ SELECT CHAR_LENGTH(a), CHAR_LENGTH(b), LEFT(a, 10), LEFT(b, 10) FROM t1; CHAR_LENGTH(a) CHAR_LENGTH(b) LEFT(a, 10) LEFT(b, 10) 254 254 aaaaaaaaaa aaaaaaaaaa DROP TABLE t1; +# +# MDEV-16134 Wrong I_S.COLUMNS.CHARACTER_XXX_LENGTH value for compressed columns +# +CREATE TABLE t1 +( +a VARCHAR(10) CHARACTER SET latin1 COMPRESSED, +b VARCHAR(10) CHARACTER SET utf8 COMPRESSED +); +SELECT COLUMN_NAME, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH +FROM INFORMATION_SCHEMA.COLUMNS +WHERE TABLE_SCHEMA='test' AND TABLE_NAME='t1' AND COLUMN_NAME IN ('a','b') +ORDER BY COLUMN_NAME; +COLUMN_NAME CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH +a 10 10 +b 10 30 +DROP TABLE t1; diff --git a/mysql-test/main/column_compression.test b/mysql-test/main/column_compression.test index 5590c995396..cdd9adb254d 100644 --- a/mysql-test/main/column_compression.test +++ b/mysql-test/main/column_compression.test @@ -120,3 +120,19 @@ CREATE TABLE t1(a TINYTEXT COMPRESSED, b TINYTEXT) CHARACTER SET utf8; INSERT INTO t1 VALUES (REPEAT(_latin1'a', 254), REPEAT(_latin1'a', 254)); SELECT CHAR_LENGTH(a), CHAR_LENGTH(b), LEFT(a, 10), LEFT(b, 10) FROM t1; DROP TABLE t1; + + +--echo # +--echo # MDEV-16134 Wrong I_S.COLUMNS.CHARACTER_XXX_LENGTH value for compressed columns +--echo # + +CREATE TABLE t1 +( + a VARCHAR(10) CHARACTER SET latin1 COMPRESSED, + b VARCHAR(10) CHARACTER SET utf8 COMPRESSED +); +SELECT COLUMN_NAME, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH +FROM INFORMATION_SCHEMA.COLUMNS +WHERE TABLE_SCHEMA='test' AND TABLE_NAME='t1' AND COLUMN_NAME IN ('a','b') +ORDER BY COLUMN_NAME; +DROP TABLE t1; diff --git a/sql/field.h b/sql/field.h index 50ee5b7784d..baed1511837 100644 --- a/sql/field.h +++ b/sql/field.h @@ -1737,7 +1737,7 @@ public: Information_schema_character_attributes information_schema_character_attributes() const { - return Information_schema_character_attributes(field_length, + return Information_schema_character_attributes(max_display_length(), char_length()); } friend class Create_field; @@ -3448,6 +3448,10 @@ private: str.append(STRING_WITH_LEN(" /*!100301 COMPRESSED*/")); } uint32 max_display_length() const { return field_length - 1; } + uint32 char_length() const + { + return (field_length - 1) / field_charset->mbmaxlen; + } int cmp_max(const uchar *a_ptr, const uchar *b_ptr, uint max_len); /* |