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Add IS NOT DISTINCT FROM and IS DISTINCT FROM binary operators which are

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equivalent to IS and IS NOT, respectively, for compatability with PostgreSQL
and hence standard SQL.

FossilOrigin-Name: db27611e172102483eaede3981d473e3d5bf93d98bc68f480398b1573876349d
This commit is contained in:
drh
2022-05-12 11:45:20 +00:00
parent d59a388b61
commit 902e2602c2
4 changed files with 40 additions and 9 deletions
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24
test/expr.test
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@@ -181,29 +181,53 @@ if {[working_64bit_int]} {
}
test_expr expr-1.111 {i1=NULL, i2=8} {i1 IS i2} 0
test_expr expr-1.111b {i1=NULL, i2=8} {i1 IS NOT DISTINCT FROM i2} 0
test_expr expr-1.112 {i1=NULL, i2=NULL} {i1 IS i2} 1
test_expr expr-1.112b {i1=NULL, i2=NULL} {i1 IS NOT DISTINCT FROM i2} 1
test_expr expr-1.113 {i1=6, i2=NULL} {i1 IS i2} 0
test_expr expr-1.113b {i1=6, i2=NULL} {i1 IS NOT DISTINCT FROM i2} 0
test_expr expr-1.114 {i1=6, i2=6} {i1 IS i2} 1
test_expr expr-1.114b {i1=6, i2=6} {i1 IS NOT DISTINCT FROM i2} 1
test_expr expr-1.115 {i1=NULL, i2=8} \
{CASE WHEN i1 IS i2 THEN 'yes' ELSE 'no' END} no
test_expr expr-1.115b {i1=NULL, i2=8} \
{CASE WHEN i1 IS NOT DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} no
test_expr expr-1.116 {i1=NULL, i2=NULL} \
{CASE WHEN i1 IS i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.116b {i1=NULL, i2=NULL} \
{CASE WHEN i1 IS NOT DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.117 {i1=6, i2=NULL} \
{CASE WHEN i1 IS i2 THEN 'yes' ELSE 'no' END} no
test_expr expr-1.117b {i1=6, i2=NULL} \
{CASE WHEN i1 IS NOT DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} no
test_expr expr-1.118 {i1=8, i2=8} \
{CASE WHEN i1 IS i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.118b {i1=8, i2=8} \
{CASE WHEN i1 IS NOT DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.119 {i1=NULL, i2=8} {i1 IS NOT i2} 1
test_expr expr-1.119b {i1=NULL, i2=8} {i1 IS DISTINCT FROM i2} 1
test_expr expr-1.120 {i1=NULL, i2=NULL} {i1 IS NOT i2} 0
test_expr expr-1.120b {i1=NULL, i2=NULL} {i1 IS DISTINCT FROM i2} 0
test_expr expr-1.121 {i1=6, i2=NULL} {i1 IS NOT i2} 1
test_expr expr-1.121b {i1=6, i2=NULL} {i1 IS DISTINCT FROM i2} 1
test_expr expr-1.122 {i1=6, i2=6} {i1 IS NOT i2} 0
test_expr expr-1.122b {i1=6, i2=6} {i1 IS DISTINCT FROM i2} 0
test_expr expr-1.123 {i1=NULL, i2=8} \
{CASE WHEN i1 IS NOT i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.123b {i1=NULL, i2=8} \
{CASE WHEN i1 IS DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.124 {i1=NULL, i2=NULL} \
{CASE WHEN i1 IS NOT i2 THEN 'yes' ELSE 'no' END} no
test_expr expr-1.124b {i1=NULL, i2=NULL} \
{CASE WHEN i1 IS DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} no
test_expr expr-1.125 {i1=6, i2=NULL} \
{CASE WHEN i1 IS NOT i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.125b {i1=6, i2=NULL} \
{CASE WHEN i1 IS DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} yes
test_expr expr-1.126 {i1=8, i2=8} \
{CASE WHEN i1 IS NOT i2 THEN 'yes' ELSE 'no' END} no
test_expr expr-1.126b {i1=8, i2=8} \
{CASE WHEN i1 IS DISTINCT FROM i2 THEN 'yes' ELSE 'no' END} no
do_catchsql_test expr-1.127 {
SELECT 1 IS #1;