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f738cc9876
Turning REGEXP_REPLACE into two schema-qualified functions: - mariadb_schema.regexp_replace() - oracle_schema.regexp_replace() Fixing oracle_schema.regexp_replace(subj,pattern,replacement) to treat NULL in "replacement" as an empty string. Adding new classes implementing oracle_schema.regexp_replace(): - Item_func_regexp_replace_oracle - Create_func_regexp_replace_oracle Adding helper methods: - String *Item::val_str_null_to_empty(String *to) - String *Item::val_str_null_to_empty(String *to, bool null_to_empty) and reusing these methods in both Item_func_replace and Item_func_regexp_replace.
35 lines
1.3 KiB
Plaintext
35 lines
1.3 KiB
Plaintext
SET sql_mode=ORACLE;
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#
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# MDEV-29095 REGEXP_REPLACE treats empty strings different than REPLACE in ORACLE mode
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#
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CREATE TABLE t1 (replacement VARCHAR(10));
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INSERT INTO t1 VALUES (NULL), ('');
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SELECT replacement, REGEXP_REPLACE('abba','a',replacement) FROM t1 ORDER BY replacement;
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replacement REGEXP_REPLACE('abba','a',replacement)
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NULL bb
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bb
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DROP TABLE t1;
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SELECT REGEXP_REPLACE('abba','a',null);
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REGEXP_REPLACE('abba','a',null)
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bb
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EXPLAIN EXTENDED SELECT REPLACE('abba','a',null) ;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select replace('abba','a',NULL) AS "REPLACE('abba','a',null)"
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CREATE VIEW v1 AS SELECT REPLACE('abba','a',null) ;
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SHOW CREATE VIEW v1;
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View Create View character_set_client collation_connection
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v1 CREATE VIEW "v1" AS select replace('abba','a',NULL) AS "REPLACE('abba','a',null)" latin1 latin1_swedish_ci
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SELECT * FROM v1;
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REPLACE('abba','a',null)
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bb
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SET sql_mode=DEFAULT;
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SHOW CREATE VIEW v1;
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View Create View character_set_client collation_connection
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v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select oracle_schema.replace('abba','a',NULL) AS `REPLACE('abba','a',null)` latin1 latin1_swedish_ci
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SELECT * FROM v1;
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REPLACE('abba','a',null)
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bb
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DROP VIEW v1;
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