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This patch improves handling of NULLs in textual fields in ColumnStore. Previously empty strings were considered NULLs and it could be a problem if data scheme allows for empty strings. It was also one of major reasons of behavior difference between ColumnStore and other engines in MariaDB family. Also, this patch fixes some other bugs and incorrect behavior, for example, incorrect comparison for "column <= ''" which evaluates to constant True for all purposes before this patch.
169 lines
2.8 KiB
Plaintext
169 lines
2.8 KiB
Plaintext
DROP DATABASE IF EXISTS json_quote_db;
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CREATE DATABASE json_quote_db;
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USE json_quote_db;
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# ----------------------------------------------------------------------
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# Test of JSON_QUOTE, JSON_UNQUOTE function.
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# ----------------------------------------------------------------------
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CREATE TABLE t1(l LONGTEXT) ENGINE = columnstore;
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INSERT INTO
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t1
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VALUES
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(NULL);
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SELECT
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JSON_QUOTE(l, NULL)
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FROM
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t1;
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ERROR 42000: Incorrect parameter count in the call to native function 'JSON_QUOTE'
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SELECT
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JSON_QUOTE(l, 'bar')
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FROM
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t1;
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ERROR 42000: Incorrect parameter count in the call to native function 'JSON_QUOTE'
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SELECT
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JSON_UNQUOTE(l, NULL)
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FROM
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t1;
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ERROR 42000: Incorrect parameter count in the call to native function 'JSON_UNQUOTE'
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SELECT
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JSON_UNQUOTE(l, 'bar')
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FROM
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t1;
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ERROR 42000: Incorrect parameter count in the call to native function 'JSON_UNQUOTE'
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# Null arg
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SELECT
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JSON_QUOTE(l)
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FROM
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t1;
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JSON_QUOTE(l)
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NULL
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SELECT
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JSON_UNQUOTE(l)
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FROM
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t1;
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JSON_UNQUOTE(l)
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NULL
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# Calling based on encodings
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TRUNCATE t1;
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INSERT INTO
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t1
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VALUES
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('abc');
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SELECT
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l AS raw,
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JSON_QUOTE(CONVERT(l USING ascii)) AS quote_ascii,
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JSON_QUOTE(CONVERT(l USING latin1)) AS quote_latin1,
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JSON_QUOTE(CONVERT(l USING utf8)) AS quote_utf8,
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JSON_QUOTE(CONVERT(l USING utf8mb4)) AS quote_utf8mb4
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FROM
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t1;
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raw quote_ascii quote_latin1 quote_utf8 quote_utf8mb4
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abc "abc" "abc" "abc" "abc"
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# Chinese characters (normal in console,abnormal in test)
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CREATE TABLE t2(l VARCHAR(50)) ENGINE = columnstore;
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INSERT INTO
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t2
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VALUES
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(X'e68891');
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SELECT
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*
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FROM
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t2;
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l
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我
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SET
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NAMES 'utf8';
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# All should be the Chinese "I" i.e. 我
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SELECT
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JSON_QUOTE(CONVERT(l USING utf8)) AS quote_utf8,
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JSON_COMPACT(JSON_QUOTE(CONVERT(l USING utf8))) AS compact_quote_utf8,
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JSON_QUOTE(CONVERT(l USING utf8mb4)) AS quote_utf8mb4,
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JSON_UNQUOTE(CONVERT(l USING utf8)) AS unquote_utf8
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FROM
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t2;
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quote_utf8 compact_quote_utf8 quote_utf8mb4 unquote_utf8
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"我" "我" "我" 我
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# Do nothing
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TRUNCATE t1;
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INSERT INTO
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t1
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VALUES
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('"');
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SELECT
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JSON_QUOTE(l),
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JSON_UNQUOTE(l)
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FROM
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t1;
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JSON_QUOTE(l) JSON_UNQUOTE(l)
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"\"" "
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TRUNCATE t1;
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INSERT INTO
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t1
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VALUES
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('""');
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SELECT
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JSON_UNQUOTE(l),
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CHAR_LENGTH(JSON_UNQUOTE(l))
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FROM
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t1;
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JSON_UNQUOTE(l) CHAR_LENGTH(JSON_UNQUOTE(l))
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0
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TRUNCATE t1;
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INSERT INTO
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t1
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VALUES
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('"" ');
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SELECT
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JSON_UNQUOTE(l)
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FROM
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t1;
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JSON_UNQUOTE(l)
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# Inconrrect type e.g. Integer
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CREATE TABLE t3(i INT) ENGINE = columnstore;
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INSERT INTO
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t3
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VALUES
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(123);
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SELECT
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JSON_QUOTE(i)
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FROM
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t3;
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JSON_QUOTE(i)
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NULL
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SELECT
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JSON_UNQUOTE(i)
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FROM
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t3;
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JSON_UNQUOTE(i)
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123
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# Round trip
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TRUNCATE t1;
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INSERT INTO
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t1
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VALUES
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('abc');
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SELECT
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JSON_UNQUOTE(JSON_COMPACT(JSON_QUOTE(l)))
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FROM
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t1;
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JSON_UNQUOTE(JSON_COMPACT(JSON_QUOTE(l)))
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abc
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SELECT
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JSON_UNQUOTE(
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JSON_UNQUOTE(
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JSON_UNQUOTE(JSON_QUOTE(JSON_QUOTE(JSON_QUOTE(l))))
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)
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)
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FROM
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t1;
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JSON_UNQUOTE(
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JSON_UNQUOTE(
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JSON_UNQUOTE(JSON_QUOTE(JSON_QUOTE(JSON_QUOTE(l))))
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)
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)
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abc
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DROP TABLE t1;
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# DROP TABLE t2;
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DROP TABLE t3;
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DROP DATABASE json_quote_db;
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