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170 lines
3.0 KiB
Plaintext
170 lines
3.0 KiB
Plaintext
--
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-- STRINGS
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-- Test various data entry syntaxes.
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--
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-- SQL92 string continuation syntax
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SELECT 'first line'
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' - next line'
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' - third line'
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AS "Three lines to one";
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Three lines to one
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-------------------------------------
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first line - next line - third line
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(1 row)
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-- illegal string continuation syntax
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SELECT 'first line'
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' - next line' /* this comment is not allowed here */
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' - third line'
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AS "Illegal comment within continuation";
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ERROR: parser: parse error at or near "'"
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--
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-- test conversions between various string types
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--
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SELECT CAST(f1 AS text) AS "text(char)" FROM CHAR_TBL;
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text(char)
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------------
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a
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ab
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abcd
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abcd
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(4 rows)
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SELECT CAST(f1 AS text) AS "text(varchar)" FROM VARCHAR_TBL;
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text(varchar)
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---------------
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a
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ab
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abcd
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abcd
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(4 rows)
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SELECT CAST(name 'namefield' AS text) AS "text(name)";
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text(name)
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------------
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namefield
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(1 row)
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SELECT CAST(f1 AS char(10)) AS "char(text)" FROM TEXT_TBL;
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char(text)
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------------
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doh!
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hi de ho n
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(2 rows)
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SELECT CAST(f1 AS char(10)) AS "char(varchar)" FROM VARCHAR_TBL;
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char(varchar)
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---------------
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a
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ab
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abcd
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abcd
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(4 rows)
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SELECT CAST(name 'namefield' AS char(10)) AS "char(name)";
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char(name)
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------------
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namefield
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(1 row)
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SELECT CAST(f1 AS varchar) AS "varchar(text)" FROM TEXT_TBL;
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varchar(text)
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-------------------
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doh!
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hi de ho neighbor
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(2 rows)
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SELECT CAST(f1 AS varchar) AS "varchar(char)" FROM CHAR_TBL;
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varchar(char)
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---------------
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a
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ab
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abcd
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abcd
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(4 rows)
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SELECT CAST(name 'namefield' AS varchar) AS "varchar(name)";
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varchar(name)
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---------------
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namefield
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(1 row)
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--
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-- test SQL92 string functions
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--
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SELECT TRIM(BOTH FROM ' bunch o blanks ') AS "bunch o blanks";
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bunch o blanks
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----------------
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bunch o blanks
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(1 row)
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SELECT TRIM(LEADING FROM ' bunch o blanks ') AS "bunch o blanks ";
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bunch o blanks
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------------------
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bunch o blanks
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(1 row)
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SELECT TRIM(TRAILING FROM ' bunch o blanks ') AS " bunch o blanks";
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bunch o blanks
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------------------
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bunch o blanks
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(1 row)
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SELECT TRIM(BOTH 'x' FROM 'xxxxxsome Xsxxxxx') AS "some Xs";
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some Xs
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---------
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some Xs
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(1 row)
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SELECT SUBSTRING('1234567890' FROM 3) AS "34567890";
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34567890
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----------
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34567890
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(1 row)
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SELECT SUBSTRING('1234567890' FROM 4 FOR 3) AS "456";
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456
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-----
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456
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(1 row)
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SELECT POSITION('4' IN '1234567890') AS "4";
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4
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---
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4
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(1 row)
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SELECT POSITION(5 IN '1234567890') AS "5";
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5
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---
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5
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(1 row)
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--
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-- test implicit type conversion
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--
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SELECT 'unknown' || ' and unknown' AS "Concat unknown types";
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Concat unknown types
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----------------------
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unknown and unknown
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(1 row)
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SELECT text 'text' || ' and unknown' AS "Concat text to unknown type";
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Concat text to unknown type
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-----------------------------
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text and unknown
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(1 row)
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SELECT text 'text' || char(10) ' and characters' AS "Concat text to char";
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Concat text to char
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---------------------
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text and chara
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(1 row)
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SELECT text 'text' || varchar ' and varchar' AS "Concat text to varchar";
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Concat text to varchar
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------------------------
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text and varchar
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(1 row)
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