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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.
27 lines
738 B
Plaintext
27 lines
738 B
Plaintext
SET sql_mode=ORACLE;
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--echo #
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--echo # MDEV-29095 REGEXP_REPLACE treats empty strings different than REPLACE in ORACLE mode
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--echo #
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#SELECT REGEXP_REPLACE(null,'a','b') ;
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#SELECT REGEXP_REPLACE('ab',null,'b') ;
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#SELECT REGEXP_REPLACE('ab','a',null) ;
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#SELECT REGEXP_REPLACE('ab',null,null) ;
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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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DROP TABLE t1;
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SELECT REGEXP_REPLACE('abba','a',null);
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EXPLAIN EXTENDED SELECT 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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SELECT * FROM v1;
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SET sql_mode=DEFAULT;
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SHOW CREATE VIEW v1;
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SELECT * FROM v1;
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DROP VIEW v1;
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