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Digg  pg_field_prtlen
Returns the printed length
(PHP 4 >= 4.2.0, PHP 5)
Example 1929. Getting information about fields<?phpThe above example will output: column 0Code Examples / Notes » pg_field_prtlendjmaze@moocms
Or even easier to keep things simple on fetching SELECT a.attname AS name, t.typname AS type, a.attstorage AS i, CASE WHEN a.attlen = -1 THEN a.atttypmod ELSE a.attlen END AS size FROM pg_attribute a , pg_class c, pg_type t WHERE c.relname = 'moo_members' AND a.attrelid = c.oid AND a.atttypid = t.oid and a.attnum > 0 and not a.attisdropped r dot galovic
mysql_field_len () function and more for postgres ... problems ... * pg_field_prtlen ... gives the actual size of the field back (it shows the count of the content allready inside the field - not the possible max-len) * pg_filed_size ... can't be used for varchar or bpchar fields ...but there is a way to get the real-max-length of a field in postgreSQL via the system tables: //returns an array with infos of every field in the table (name, type, length, size) function SQLConstructFieldsInfo($TABLE, $DBCON) { $s="SELECT a.attname AS name, t.typname AS type, a.attlen AS size, a.atttypmod AS len, a.attstorage AS i FROM pg_attribute a , pg_class c, pg_type t WHERE c.relname = '$TABLE' AND a.attrelid = c.oid AND a.atttypid = t.oid"; if ($r = pg_query($DBCON,$s)) { $i=0; while ($q = pg_fetch_assoc($r)) { $a[$i]["type"]=$q["type"]; $a[$i]["name"]=$q["name"]; if($q["len"]<0 && $q["i"]!="x") { // in case of digits if needed ... (+1 for negative values) $a[$i]["len"]=(strlen(pow(2,($q["size"]*8)))+1); } else { $a[$i]["len"]=$q["len"]; } $a[$i]["size"]=$q["size"]; $i++; } return $a; } return null; } // usage $DBCON=pg_connect("host=YOUR-HOST port=YOUR-PORT dbname=YOUR-DB user=YOUR-USER password=YOUR-PASS"); $TABLE="YOUR-TABLENAME"; $RET=SQLConstructFieldsInfo($TABLE, $DBCON); $j = count($RET); for ($i=0; $i < $j; $i++) { echo " $i name=".$RET[$i]["name"]." type=".$RET[$i]["type"]." length=".$RET[$i]["len"]." size=".$RET[$i]["size"]." bytes"; } gregm
If you update the query to this: $s = "SELECT a.attname AS name, t.typname AS type, a.attlen AS size, a.atttypmod AS len, a.attstorage AS i FROM pg_attribute a , pg_class c, pg_type t WHERE c.relname = '$TABLE' AND a.attrelid = c.oid AND a.atttypid = t.oid and a.attnum > 0 and not a.attisdropped"; You get postgres to filter out the 'postgres' columns and get only your columns back. |
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pg_affected_rows pg_cancel_query pg_client_encoding pg_close pg_connect pg_connection_busy pg_connection_reset pg_connection_status pg_convert pg_copy_from pg_copy_to pg_dbname pg_delete pg_end_copy pg_escape_bytea pg_escape_string pg_execute pg_fetch_all_columns pg_fetch_all pg_fetch_array pg_fetch_assoc pg_fetch_object pg_fetch_result pg_fetch_row pg_field_is_null pg_field_name pg_field_num pg_field_prtlen pg_field_size pg_field_table pg_field_type_oid pg_field_type pg_free_result pg_get_notify pg_get_pid pg_get_result pg_host pg_insert pg_last_error pg_last_notice pg_last_oid pg_lo_close pg_lo_create pg_lo_export pg_lo_import pg_lo_open pg_lo_read_all pg_lo_read pg_lo_seek pg_lo_tell pg_lo_unlink pg_lo_write pg_meta_data pg_num_fields pg_num_rows pg_options pg_parameter_status pg_pconnect pg_ping pg_port pg_prepare pg_put_line pg_query_params pg_query pg_result_error_field pg_result_error pg_result_seek pg_result_status pg_select pg_send_execute pg_send_prepare pg_send_query_params pg_send_query pg_set_client_encoding pg_set_error_verbosity pg_trace pg_transaction_status pg_tty pg_unescape_bytea pg_untrace pg_update pg_version |
