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use super::*;
impl IndexBuilder for PostgresQueryBuilder {
fn prepare_table_index_expression(&self, create: &IndexCreateStatement, sql: &mut SqlWriter) {
if create.index.name.is_some() {
write!(sql, "CONSTRAINT ").unwrap();
self.prepare_index_name(&create.index.name, sql);
write!(sql, " ").unwrap();
}
self.prepare_index_prefix(create, sql);
self.prepare_index_columns(&create.index.columns, sql);
}
fn prepare_index_create_statement(&self, create: &IndexCreateStatement, sql: &mut SqlWriter) {
write!(sql, "CREATE ").unwrap();
self.prepare_index_prefix(create, sql);
write!(sql, "INDEX ").unwrap();
self.prepare_index_name(&create.index.name, sql);
write!(sql, " ON ").unwrap();
if let Some(table) = &create.table {
table.prepare(sql, self.quote());
}
self.prepare_index_type(&create.index_type, sql);
self.prepare_index_columns(&create.index.columns, sql);
}
fn prepare_index_drop_statement(&self, drop: &IndexDropStatement, sql: &mut SqlWriter) {
write!(sql, "DROP INDEX ").unwrap();
if let Some(name) = &drop.index.name {
write!(sql, "\"{}\"", name).unwrap();
}
}
fn prepare_index_type(&self, col_index_type: &Option<IndexType>, sql: &mut SqlWriter) {
if let Some(index_type) = col_index_type {
write!(
sql,
" USING {}",
match index_type {
IndexType::BTree => "BTREE".to_owned(),
IndexType::FullText => "GIN".to_owned(),
IndexType::Hash => "HASH".to_owned(),
IndexType::Custom(custom) => custom.to_string(),
}
)
.unwrap();
}
}
fn prepare_index_prefix(&self, create: &IndexCreateStatement, sql: &mut SqlWriter) {
if create.primary {
write!(sql, "PRIMARY KEY ").unwrap();
}
if create.unique {
write!(sql, "UNIQUE ").unwrap();
}
}
}
