问题
I am importing data into SAP HANA using the CSV files.
When I try to import a column which has an array type then it results in the following error
ARRAY type is not compatible with PARAMETER TYPE
For example
CREATE COLUMN TABLE "SCHEMA"."TABLE"
( 'ID' INT,
'SUBJECTS' INT ARRAY)
The above query creates the table and when I run
INSERT INTO "SCHEMA"."TABLE" VALUES (1,ARRAY(1,2,3))
It inserts successfully into the HANA database.
But when I try
INSERT INTO "SCHEMA"."TABLE" VALUES (1,"{1,2,3}")
It does not work.So how can I import the array values in the CSV file to the column in HANA database.
回答1:
You could construct the INSERT statement in a loop but you still need to construct the ARRAY() call for every record.
Ok, here's the example you asked for. By now you should understand that there is no simple IMPORT command that would automatically insert arrays into a HANA table.
That leaves you with two options as I see it:
- you write a loader program that reads your CSV file and parses the array data {..., ... , ...} and makes INSERT statements with ARRAY functions out of it. or
- You load the data in two steps: 2.1 Load the data from the CSV as-is and put the array data into a CLOB column. 2.2. Add the array columns to the table and run a loop that takes the CLOB data, replaces the curly brackets with normal brackets and creates a dynamic SQL statement.
Like so:
create column table array_imp_demo as (
select owner_name , object_type, to_clob( '{'|| string_agg ( object_oid, ', ') || '}' )array_text
from ownership
group by owner_name, object_type);
select top 10 * from array_imp_demo;
/*
OWNER_NAME OBJECT_TYPE ARRAY_TEXT
SYS TABLE {142540, 142631, 142262, 133562, 185300, 142388, 133718, 142872, 133267, 133913, 134330, 143063, 133386, 134042, 142097, 142556, 142688, 142284, 133577, 185357, 142409, 133745, 142902, 133308, 133948, 134359, 143099, 133411, 134135, 142118, 142578, 142762, 142306, 133604, 142429, 133764, 142928, 133322, 133966, 134383, 143120, 133443, 134193, 142151, 142587, 142780, 142327, 133642, 142448, 133805, 142967, 185407, 133334, 133988, 134624, 143134, 133455, 134205, 142173, 142510, 142606, 142798, 142236, 133523, 142359, 133663, 142465, 133825, 142832, 133175, 133866, 134269, 143005, 133354, 134012, 134646, 143148, 133497, 134231, 142195, 142526, 142628, 142816, 142259, 133551, 142382, 133700, 142493, 133855, 142862, 133235, 133904, 134309, 143051, 133373, 134029, 142082, 143306, 133513, 134255, 142216, 142553, 142684, 142281, 133572, 185330, 142394, 133738, 142892, 133299, 133929, 134351, 143080, 133406, 134117, 142115, 142576, 142711, 142303, 133596, 142414, 133756, 142922, 185399, 133319, 133958, 134368, 143115,
SYSTEM TABLE {154821, 146065, 146057, 173960, 174000, 173983, 144132, 173970}
_SYS_STATISTICS TABLE {151968, 146993, 147245, 152026, 147057, 147023, 151822, 147175, 147206, 151275, 151903, 147198, 147241, 151326, 151798, 152010, 147016, 147039, 147068, 151804, 151810, 147002, 147202, 151264, 151850, 147186, 147114, 147228, 151300, 151792, 151992, 147030, 147062, 151840, 147181, 147210, 151289, 151754, 149419, 150274, 147791, 150574, 147992, 149721, 150672, 148132, 149894, 147042, 148434, 149059, 150071, 147518, 148687, 149271, 150221, 150877, 147716, 148913, 150388, 147957, 149675, 150634, 148102, 149829, 148267, 148979, 149976, 147494, 148663, 151107, 149224, 150178, 147667, 148855, 149532, 150306, 147925, 149602, 150598, 148080, 149792, 148179, 149926, 147417, 148547, 149186, 150107, 147568, 148804}
_SYS_EPM TABLE {143391, 143427, 143354, 143385, 143411, 143376, 143398, 143367, 143414, 143344, 175755}
_SYS_REPO TABLE {145086, 151368, 171680, 145095, 152081, 169183, 151443, 149941, 154366, 143985, 145116, 152104, 151496, 169029, 177728, 179047, 145065, 169760, 178767, 151659, 169112, 169258, 153736, 177757, 174923, 145074, 150726, 151697, 169133, 178956, 145083, 169171, 168992, 145092, 177665, 169178, 151378, 169271, 178881, 174911, 154128, 143980, 145101, 152098, 151481, 177720, 152504, 145062, 151570, 169102, 154058, 145071, 170733, 151687, 169130, 145080, 171629, 169166, 178846, 145089, 149588, 151373, 177614, 143976, 145098, 152087, 151458, 149955, 178907, 154386, 145059, 169605, 151529, 169035, 178579, 151176, 179178, 145068, 150709, 151670, 169124, 174905, 177778, 154244, 145077, 170883, 169158, 144072, 152681, 144285, 154415, 144620, 145268, 168884, 144895, 143512, 151428, 168774, 143750, 152337, 168558, 144114, 149559, 152719, 144327, 144674, 145508, 168924, 144939, 143578, 152135, 143793, 152392, 168587, 144151, 152753, 144370, 144720, 145722, 168960, 144990, 143626, 152174, 143832, 152435, 168620, 144188, 152785,
_SYS_TASK TABLE {146851, 146847, 146856, 146231, 146143, 146839, 146854, 146834, 146430, 146464, 146167, 146505, 146205, 146257, 146384, 146313, 146420, 146356, 146454, 146155, 146495, 146193, 146525, 146244, 146368, 146296, 146410, 146346, 146443, 146148, 146484, 146181, 146517, 146234, 146275, 146395, 146325}
_SYS_AFL TABLE {177209, 176741, 176522, 177243, 176777, 176692, 176201, 177294, 176929, 177328, 176967, 177383, 177105, 177015, 176826, 177143, 177056, 176866, 177215, 176748, 176550, 176474, 177249, 176784, 176699, 176218, 146871, 177300, 176935, 177335, 176973, 177389, 177111, 177021, 176835, 177156, 177062, 176883, 185427, 177221, 176755, 176572, 176487, 177261, 176790, 176706, 176398, 177306, 176941, 177341, 176979, 177397, 177119, 177033, 176843, 177162, 177069, 176889, 177228, 176762, 176589, 177267, 176799, 176713, 176416, 177313, 176953, 177348, 176991, 177404, 177127, 177040, 176849, 177173, 177075, 176895, 177195, 176732, 176507, 177234, 176768, 177274, 176805, 176720, 176448, 177285, 176921, 177319, 176959, 177354, 176997, 177375, 177095, 177007, 176818, 177411, 177133, 177047, 176858, 177179, 177081, 176911, 177201, 176738, 176519, 177241, 176775, 176690, 176196, 177280, 176814, 176727, 176464, 177291, 176927, 177326, 176965, 177360, 177003, 177381, 177103, 177013, 176824, 177141, 177053, 176864, 177191, 177091,
_SYS_XB TABLE {146971, 146957}
DEVDUDE TABLE {167121, 165374, 182658, 156616, 173111, 181568, 174901, 183413, 184432, 183498, 183470, 184464, 155821, 173102, 183613, 184495, 155857, 166744, 180454, 184547, 156234, 172096, 166765, 165548, 184649, 183399, 184357, 184577, 183477, 181594, 183537, 181572, 167201, 184685, 185467, 183406, 184422, 184610, 183491, 155842, 172923, 157723, 182636, 167895, 183463, 184454, 183505, 165542, 183606, 184488, 155849, 172749, 157626, 184527, 183449, 166759, 184627, 182827, 184347, 184568, 157619, 172118, 183530, 181556, 167137, 184670, 182642, 184411, 184598, 183484, 155835, 183456, 183593, 181584, 167328, 183421, 184443, 183586, 184474, 155828, 166392, 183620, 184517, 183435, 183442, 183512, 166753, 184557, 156598, 172106, 183523, 166771, 166568, 184660, 182630, 184381, 184587, 183428, 157681, 182649, 167264, 168236}
ADMIN TABLE {158520, 158925, 158982, 158492, 158571, 158583, 158560, 158541, 158744}
*/
Ok, let's just assume that this is the data that you managed to load from your CSV file into a table and that the ARRAY_DATA column is a big CLOB.
Now, the data is in the table, but you need to put it into an ARRAY column.
alter table array_imp_demo add (array_data integer array);
The unconvenient part follows now: creating a new UPDATE command for each record to transform the CLOB data into a proper ARRAY() function call. Be aware that this update command works correctly, because (OWNER, OBJECT_TYPE) are used as keys in this case.
do begin
declare vsqlmain nvarchar (50) :='UPDATE array_imp_demo set array_data = ARRAY ';
declare vsql nvarchar(5000);
declare cursor c_upd for
select OWNER_NAME, OBJECT_TYPE,
replace (replace (ARRAY_TEXT, '{', '(' ), '}', ')' ) array_data
from array_imp_demo;
for cur_row as c_upd do
vsql = :vsqlmain || cur_row.array_data;
vsql = :vsql || ' WHERE owner_name = ''' || cur_row.owner_name || '''';
vsql = :vsql || ' AND object_type = ''' || cur_row.object_type || '''';
exec :vsql;
end for;
end;
select * from array_imp_demo;
OWNER_NAME OBJECT_TYPE ARRAY_TEXT ARRAY_DATA
SYS TABLE {142540, 142631, 142262,... 142540, 142631, 142262,...
SYSTEM TABLE {154821, 146065, 146057,... 154821, 146065, 146057,...
_SYS_STATISTICS TABLE {151968, 146993, 147245,... 151968, 146993, 147245,...
_SYS_EPM TABLE {143391, 143427, 143354,... 143391, 143427, 143354,...
_SYS_REPO TABLE {145086, 151368, 171680,... 145086, 151368, 171680,...
After that you can drop the CLOB column.
Ok, that's about it from my side.
回答2:
Array storage types can currently only be created by using the ARRAY() function.
回答3:
Have you tried using CTL method to import data. I hope that might help.
来源：https://stackoverflow.com/questions/40102034/import-array-type-into-hana