Reformatted some fixed-font texts for better output. (297f653d) · Commits · Software / OSDI20 Artifacts / mariadb

Docs/manual.texi

+33 −22

Original line number	Diff line number	Diff line
		@@ -598,7 +598,8 @@ Full operator and function support in the @code{SELECT} and @code{WHERE}
		parts of queries. For example:

		@example
		mysql> SELECT CONCAT(first_name, " ", last_name) FROM tbl_name
		mysql> SELECT CONCAT(first_name, " ", last_name)
		FROM tbl_name
		WHERE income/dependents > 10000 AND age > 30;
		@end example

		@@ -885,7 +886,9 @@ any problems with dates until the year 2030:
		mysql> DROP TABLE IF EXISTS y2k;
		Query OK, 0 rows affected (0.01 sec)

		mysql> CREATE TABLE y2k (date date, date_time datetime, time_stamp timestamp);
		mysql> CREATE TABLE y2k (date date,
		date_time datetime,
		time_stamp timestamp);
		Query OK, 0 rows affected (0.00 sec)

		mysql> INSERT INTO y2k VALUES
		@@ -2581,7 +2584,9 @@ The default transaction isolation level is @code{SERIALIZABLE}.
		@xref{SET TRANSACTION}.
		@end itemize

		This is the same as using @code{--sql-mode=REAL_AS_FLOAT,PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE,SERIALIZE,ONLY_FULL_GROUP_BY}.
		This is the same as using
		@code{--sql-mode=REAL_AS_FLOAT,PIPES_AS_CONCAT,ANSI_QUOTES,
		IGNORE_SPACE,SERIALIZE,ONLY_FULL_GROUP_BY}.


		@node Extensions to ANSI, Differences from ANSI, ANSI mode, Compatibility
		@@ -2802,7 +2807,7 @@ arguments.)

		@item The @code{BIT_COUNT()}, @code{CASE}, @code{ELT()},
		@code{FROM_DAYS()}, @code{FORMAT()}, @code{IF()}, @code{PASSWORD()},
		@code{ENCRYPT()}, @code{md5()}, @code{ENCODE()}, @code{DECODE()},
		@code{ENCRYPT()}, @code{MD5()}, @code{ENCODE()}, @code{DECODE()},
		@code{PERIOD_ADD()}, @code{PERIOD_DIFF()}, @code{TO_DAYS()}, or
		@code{WEEKDAY()} functions.

		@@ -2899,13 +2904,15 @@ SELECT table1.* FROM table1,table2 WHERE table1.id=table2.id;
		The queries:
		@example
		SELECT * FROM table1 WHERE id NOT IN (SELECT id FROM table2);
		SELECT * FROM table1 WHERE NOT EXISTS (SELECT id FROM table2 where table1.id=table2.id);
		SELECT * FROM table1 WHERE NOT EXISTS (SELECT id FROM table2
		WHERE table1.id=table2.id);
		@end example

		Can be rewritten as:

		@example
		SELECT table1.* FROM table1 LEFT JOIN table2 ON table1.id=table2.id where table2.id IS NULL
		SELECT table1.* FROM table1 LEFT JOIN table2 ON table1.id=table2.id
		WHERE table2.id IS NULL;
		@end example

		For more complicated subqueries you can often create temporary tables
		@@ -2956,8 +2963,8 @@ ANSI SQL syntax @code{INSERT INTO ... SELECT ...}, which is basically
		the same thing. @xref{INSERT SELECT}.

		@example
		INSERT INTO tblTemp2 (fldID) SELECT tblTemp1.fldOrder_ID FROM tblTemp1 WHERE
		tblTemp1.fldOrder_ID > 100;
		INSERT INTO tblTemp2 (fldID) SELECT tblTemp1.fldOrder_ID
		FROM tblTemp1 WHERE tblTemp1.fldOrder_ID > 100;
		@end example

		Alternatively, you can use @code{SELECT INTO OUTFILE...} or @code{CREATE
		@@ -3492,15 +3499,17 @@ the hidden columns when executing @code{DISTINCT}
		An example of this is:

		@example
		SELECT DISTINCT mp3id FROM band_downloads WHERE userid = 9 ORDER BY id
		DESC;
		SELECT DISTINCT mp3id FROM band_downloads
		WHERE userid = 9 ORDER BY id DESC;
		@end example

		and

		@example
		SELECT DISTINCT band_downloads.mp3id, FROM band_downloads,band_mp3
		WHERE band_downloads.userid = 9 AND band_mp3.id = band_downloads.mp3id
		SELECT DISTINCT band_downloads.mp3id
		FROM band_downloads,band_mp3
		WHERE band_downloads.userid = 9
		AND band_mp3.id = band_downloads.mp3id
		ORDER BY band_downloads.id DESC;
		@end example

		@@ -3737,8 +3746,10 @@ items.price=month.price where items.id=month.id;};
		@item
		Derived tables.
		@example
		select a.col1, b.col2 from (select max(col1) as col1 from root_table ) a,
		other_table b where a.col1=b.col1
		SELECT a.col1, b.col2
		FROM (SELECT MAX(col1) AS col1 FROM root_table) a,
		other_table b
		WHERE a.col1=b.col1;
		@end example

		This could be done by automatically creating temporary tables for the
		@@ -3879,12 +3890,12 @@ Make @code{LOAD DATA INFILE} understand syntax like:
		@example
		LOAD DATA INFILE 'file_name.txt' INTO TABLE tbl_name
		TEXT_FIELDS (text_field1, text_field2, text_field3)
		SET table_field1=concatenate(text_field1, text_field2), table_field3=23
		SET table_field1=concatenate(text_field1, text_field2),
		table_field3=23
		IGNORE text_field3

		This can be used to skip over extra columns in the text file, or update columns
		based on expressions of the read data...
		@end example
		This can be used to skip over extra columns in the text file,
		or update columns based on expressions of the read data...
		@item
		@code{LOAD DATA INFILE 'file_name' INTO TABLE 'table_name' ERRORS TO err_table_name}
		This would cause any errors and warnings to be logged into the err_table_name