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Allow "substring()" as an alias for "substr()" for compatibility with other

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SQL engines.

FossilOrigin-Name: aa2ee5754c9f8378c4d490ca756a6415042904477727f0d86e9c0190b5e8b275
This commit is contained in:
drh
2020-11-23 14:50:43 +00:00
parent 6a5e21149b
commit 1335ec7df7
4 changed files with 15 additions and 14 deletions
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9
test/substr.test
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@ -11,7 +11,6 @@
# This file implements regression tests for SQLite library. The
# focus of this file is testing the built-in SUBSTR() functions.
#
# $Id: substr.test,v 1.7 2009/02/03 13:10:54 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
@ -39,7 +38,7 @@ proc substr-test {id string i1 i2 result} {
set qstr '[string map {' ''} $string]'
do_test substr-$id.2 [subst {
execsql {
SELECT substr($qstr, $i1, $i2)
SELECT substring($qstr, $i1, $i2)
}
}] [list $result]
}
@ -55,7 +54,7 @@ proc subblob-test {id hex i1 i2 hexresult} {
}] [list $hexresult]
do_test substr-$id.2 [subst {
execsql {
SELECT hex(substr(x'$hex', $i1, $i2))
SELECT hex(substring(x'$hex', $i1, $i2))
}
}] [list $hexresult]
}
@ -93,7 +92,7 @@ do_test substr-1.92 {
db eval {SELECT ifnull(substr('abcdefg',NULL,1),'nil')}
} nil
do_test substr-1.93 {
db eval {SELECT ifnull(substr('abcdefg',NULL),'nil')}
db eval {SELECT ifnull(substring('abcdefg',NULL),'nil')}
} nil
do_test substr-1.94 {
db eval {SELECT ifnull(substr('abcdefg',1,NULL),'nil')}
@ -149,7 +148,7 @@ proc substr-2-test {id string idx result} {
set qstr '[string map {' ''} $string]'
do_test substr-$id.2 [subst {
execsql {
SELECT substr($qstr, $idx)
SELECT substring($qstr, $idx)
}
}] [list $result]
}