Fix PgVectorStore doDelete function as batch

Signed-off-by: CChuYong <[email protected]>

Author: CChuYong

vector-stores/spring-ai-pgvector-store/src/main/java/org/springframework/ai/vectorstore/pgvector/PgVectorStore.java

@@ -319,12 +319,21 @@ private Object convertIdToPgType(String id) {
 
 	@Override
 	public void doDelete(List<String> idList) {
-		int updateCount = 0;
-		for (String id : idList) {
-			int count = this.jdbcTemplate.update("DELETE FROM " + getFullyQualifiedTableName() + " WHERE id = ?",
-					UUID.fromString(id));
-			updateCount = updateCount + count;
-		}
+		String sql = "DELETE FROM " + getFullyQualifiedTableName() + " WHERE id = ?";
+
+		this.jdbcTemplate.batchUpdate(sql, new BatchPreparedStatementSetter() {
+
+			@Override
+			public void setValues(PreparedStatement ps, int i) throws SQLException {
+				var id = idList.get(i);
+				StatementCreatorUtils.setParameterValue(ps, 1, SqlTypeValue.TYPE_UNKNOWN, convertIdToPgType(id));
+			}
+
+			@Override
+			public int getBatchSize() {
+				return idList.size();
+			}
+		});
 	}
 
 	@Override