mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 10:22:10 +00:00
150 lines
5.7 KiB
SQL
150 lines
5.7 KiB
SQL
SELECT '-- argument validation';
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SELECT substring('hello', []); -- { serverError ILLEGAL_TYPE_OF_ARGUMENT }
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SELECT substring('hello', 1, []); -- { serverError ILLEGAL_TYPE_OF_ARGUMENT }
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SELECT substring(materialize('hello'), -1, -1);
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SELECT substring(materialize('hello'), 0); -- { serverError ZERO_ARRAY_OR_TUPLE_INDEX }
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SELECT '-- FixedString arguments';
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SELECT substring(toFixedString('hello', 16), 1, 8);
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SELECT substring(toFixedString(materialize('hello'), 16), 1, 8);
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SELECT substring(toFixedString(toString(number), 16), 1, 8) FROM system.numbers LIMIT 10;
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SELECT substring(toFixedString(toString(number), 4), 1, 3) FROM system.numbers LIMIT 995, 10;
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SELECT substring(toFixedString(toString(number), 4), 1, number % 5) FROM system.numbers LIMIT 995, 10;
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SELECT substring(toFixedString(toString(number), 4), 1 + number % 5) FROM system.numbers LIMIT 995, 10;
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SELECT substring(toFixedString(toString(number), 4), 1 + number % 5, 1 + number % 3) FROM system.numbers LIMIT 995, 10;
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SELECT '-- Enum arguments';
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DROP TABLE IF EXISTS tab;
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CREATE TABLE tab(e8 Enum8('hello' = -5, 'world' = 15), e16 Enum16('shark' = -999, 'eagle' = 9999)) ENGINE MergeTree ORDER BY tuple();
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INSERT INTO TABLE tab VALUES ('hello', 'shark'), ('world', 'eagle');
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-- positive offsets (slice from left)
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SELECT substring(e8, 1), substring (e16, 1) FROM tab;
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SELECT substring(e8, 2, 10), substring (e16, 2, 10) FROM tab;
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-- negative offsets (slice from right)
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SELECT substring(e8, -1), substring (e16, -1) FROM tab;
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SELECT substring(e8, -2, 10), substring (e16, -2, 10) FROM tab;
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-- zero offset/length
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SELECT substring(e8, 1, 0), substring (e16, 1, 0) FROM tab;
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SELECT '-- Constant enums';
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SELECT substring(CAST('foo', 'Enum8(\'foo\' = 1)'), 1, 1), substring(CAST('foo', 'Enum16(\'foo\' = 1111)'), 1, 2);
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DROP TABLE tab;
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SELECT '-- negative offset argument';
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SELECT substring('abc', number - 5) FROM system.numbers LIMIT 10;
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SELECT substring(materialize('abc'), number - 5) FROM system.numbers LIMIT 10;
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SELECT substring(toFixedString('abc', 3), number - 5) FROM system.numbers LIMIT 10;
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SELECT substring(materialize(toFixedString('abc', 3)), number - 5) FROM system.numbers LIMIT 10;
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SELECT substring('clickhouse', 2, -2);
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SELECT substring(materialize('clickhouse'), 2, -2);
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SELECT substring('clickhouse', materialize(2), -2);
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SELECT substring(materialize('clickhouse'), materialize(2), -2);
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SELECT substring('clickhouse', 2, materialize(-2));
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SELECT substring(materialize('clickhouse'), 2, materialize(-2));
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SELECT substring('clickhouse', materialize(2), materialize(-2));
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SELECT substring(materialize('clickhouse'), materialize(2), materialize(-2));
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SELECT '-- negative length argument';
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SELECT substring('abcdefgh', 2, -2);
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SELECT substring('abcdefgh', materialize(2), -2);
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SELECT substring('abcdefgh', 2, materialize(-2));
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SELECT substring('abcdefgh', materialize(2), materialize(-2));
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SELECT substring(cast('abcdefgh' AS FixedString(8)), 2, -2);
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SELECT substring(cast('abcdefgh' AS FixedString(8)), materialize(2), -2);
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SELECT substring(cast('abcdefgh' AS FixedString(8)), 2, materialize(-2));
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SELECT substring(cast('abcdefgh' AS FixedString(8)), materialize(2), materialize(-2));
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DROP TABLE IF EXISTS tab;
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CREATE TABLE tab (s String, l Int8, r Int8) ENGINE = Memory;
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INSERT INTO tab VALUES ('abcdefgh', 2, -2), ('12345678', 3, -3);
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SELECT substring(s, 2, -2) FROM tab;
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SELECT substring(s, l, -2) FROM tab;
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SELECT substring(s, 2, r) FROM tab;
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SELECT substring(s, l, r) FROM tab;
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DROP TABLE IF EXISTS tab;
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CREATE TABLE tab (s FixedString(8), l Int8, r Int8) ENGINE = Memory;
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INSERT INTO tab VALUES ('abcdefgh', 2, -2), ('12345678', 3, -3);
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SELECT substring(s, 2, -2) FROM tab;
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SELECT substring(s, l, -2) FROM tab;
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SELECT substring(s, 2, r) FROM tab;
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SELECT substring(s, l, r) FROM tab;
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DROP TABLE IF EXISTS tab;
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SELECT '-- negative offset and size';
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SELECT substring('abcdefgh', -2, -2);
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SELECT substring(materialize('abcdefgh'), -2, -2);
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SELECT substring(materialize('abcdefgh'), materialize(-2), materialize(-2));
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SELECT substring('abcdefgh', -2, -1);
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SELECT substring(materialize('abcdefgh'), -2, -1);
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SELECT substring(materialize('abcdefgh'), materialize(-2), materialize(-1));
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SELECT substring(cast('abcdefgh' AS FixedString(8)), -2, -2);
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SELECT substring(materialize(cast('abcdefgh' AS FixedString(8))), -2, -2);
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SELECT substring(materialize(cast('abcdefgh' AS FixedString(8))), materialize(-2), materialize(-2));
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SELECT substring(cast('abcdefgh' AS FixedString(8)), -2, -1);
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SELECT substring(materialize(cast('abcdefgh' AS FixedString(8))), -2, -1);
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SELECT substring(materialize(cast('abcdefgh' AS FixedString(8))), materialize(-2), materialize(-1));
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DROP TABLE IF EXISTS t;
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CREATE TABLE t
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(
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s String,
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l Int8,
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r Int8
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) ENGINE = Memory;
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INSERT INTO t VALUES ('abcdefgh', -2, -2),('12345678', -3, -3);
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SELECT substring(s, -2, -2) FROM t;
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SELECT substring(s, l, -2) FROM t;
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SELECT substring(s, -2, r) FROM t;
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SELECT substring(s, l, r) FROM t;
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SELECT '-';
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DROP TABLE IF EXISTS t;
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CREATE TABLE t(
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s FixedString(8),
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l Int8,
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r Int8
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) engine = Memory;
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INSERT INTO t VALUES ('abcdefgh', -2, -2),('12345678', -3, -3);
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SELECT substring(s, -2, -2) FROM t;
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SELECT substring(s, l, -2) FROM t;
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SELECT substring(s, -2, r) FROM t;
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SELECT substring(s, l, r) FROM t;
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DROP table if exists t;
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SELECT '-- UBSAN bug';
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/** NOTE: The behaviour of substring and substringUTF8 is inconsistent when negative offset is greater than string size:
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* substring:
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* hello
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* ^-----^ - offset -10, length 7, result: "he"
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* substringUTF8:
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* hello
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* ^-----^ - offset -10, length 7, result: "hello"
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* This may be subject for change.
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*/
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SELECT substringUTF8('hello, пÑ<C2BF>ивеÑ<C2B5>', -9223372036854775808, number) FROM numbers(16) FORMAT Null;
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SELECT '-- Alias';
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SELECT byteSlice('hello', 2, 2);
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