pgsql字段不区分大写

不区分大小写索引建立

drop index ems.sys_user_user_name;
create unique index   cclv_player_user_name     on ems.sys_user USING btree (LOWER(user_name));

字段不区分大小写

sudo tee /etc/yum.repos.d/pgdg-redhat-all.repo > /dev/null <<EOF
[pgdg-common]
name=PostgreSQL common RPMs for RHEL / Rocky \$releasever - \$basearch
baseurl=https://download.postgresql.org/pub/repos/yum/common/redhat/rhel-\$releasever-\$basearch
enabled=1
gpgcheck=0

[pgdg14]
name=PostgreSQL 14 for RHEL / Rocky \$releasever - \$basearch
baseurl=https://download.postgresql.org/pub/repos/yum/14/redhat/rhel-\$releasever-\$basearch
enabled=1
gpgcheck=0
EOF




sudo dnf makecache -y

sudo tee /etc/yum.repos.d/pgdg-redhat-all.repo > /dev/null <<EOF
[pgdg-common]
name=PostgreSQL common RPMs for RHEL / Rocky $releasever - $basearch
baseurl=https://download.postgresql.org/pub/repos/yum/common/redhat/rhel-$releasever-$basearch
enabled=1
gpgcheck=1

[pgdg14]
name=PostgreSQL 14 for RHEL / Rocky $releasever - $basearch
baseurl=https://download.postgresql.org/pub/repos/yum/14/redhat/rhel-$releasever-$basearch
enabled=1
gpgcheck=1
EOF

sudo dnf install -y postgresql14-contrib

sudo -u postgres psql -d cclv_data -c "CREATE EXTENSION IF NOT EXISTS citext;"

ALTER TABLE ems.sys_user 
ALTER COLUMN user_name TYPE citext USING user_name::citext;