| 1 | BMXPRS ; IHS/OIT/HMW - BMX WINDOWS UTILS ;
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| 2 | ;;4.1000;BMX;;Apr 17, 2011
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| 3 | ;
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| 4 | ;
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| 5 | PARSE(X) ;EP-Parse SQL Statement into array
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| 6 | ;Input SQL statement as X
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| 7 | ;Returns BMXTK() array
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| 8 | ;Errors returned in BMXERR
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| 9 | ;
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| 10 | D PRE
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| 11 | Q:$D(BMXERR)
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| 12 | D POST
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| 13 | Q
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| 14 | ;
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| 15 | POST2 ;EP - Remove commas from BMXTK
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| 16 | N J,K
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| 17 | S J=0 F S J=$O(BMXTK(J)) Q:'+J D
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| 18 | . S K=$O(BMXTK(J))
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| 19 | . I +K,","=$G(BMXTK(K)) D
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| 20 | . . K BMXTK(K)
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| 21 | . . D PACK(J)
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| 22 | . . Q
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| 23 | . Q
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| 24 | Q
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| 25 | ;
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| 26 | POST ;
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| 27 | ;Combine multi-character operators
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| 28 | N J
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| 29 | S J=0 F S J=$O(BMXTK(J)) Q:'+J D
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| 30 | . I ">"=BMXTK(J) D Q
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| 31 | . . I "="[$G(BMXTK(J+1)) D Q
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| 32 | . . . S BMXTK(J)=BMXTK(J)_"="
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| 33 | . . . K BMXTK(J+1)
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| 34 | . . . D PACK(J)
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| 35 | . . I "<"[$G(BMXTK(J+1)) D Q
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| 36 | . . . S BMXTK(J)="<"_BMXTK(J)
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| 37 | . . . K BMXTK(J+1)
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| 38 | . . . D PACK(J)
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| 39 | . I "<"=BMXTK(J) D Q
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| 40 | . . I "=>"[$G(BMXTK(J+1)) D
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| 41 | . . . S BMXTK(J)=BMXTK(J)_BMXTK(J+1)
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| 42 | . . . K BMXTK(J+1)
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| 43 | . . . D PACK(J)
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| 44 | . I "="=BMXTK(J) D Q
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| 45 | . . I "<>"[$G(BMXTK(J+1)) D
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| 46 | . . . S BMXTK(J)=BMXTK(J+1)_BMXTK(J)
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| 47 | . . . K BMXTK(J+1)
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| 48 | . . . D PACK(J)
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| 49 | Q
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| 50 | ;
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| 51 | PACK(J) ;
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| 52 | F S J=$O(BMXTK(J)) Q:'+J D
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| 53 | . S BMXTK(J-1)=BMXTK(J)
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| 54 | . K BMXTK(J)
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| 55 | Q
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| 56 | ;
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| 57 | PRE N P,T,Q,Q1,A,B S (P,T,Q)=0,BMXTK="",A=0
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| 58 | START S A=A+1
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| 59 | S B=$E(X,A)
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| 60 | I B="" G B5
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| 61 | I 'Q G QUOTE
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| 62 | I B=$C(39) G QUOTE
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| 63 | S BMXTK=BMXTK_B G START
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| 64 | QUOTE I B'=$C(39) G SPACE
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| 65 | I Q G QUOTE2
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| 66 | ;S Q=1,BMXTK=B G START
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| 67 | S Q=1,BMXTK=BMXTK_B G START
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| 68 | QUOTE2 S Q1=B,A=A+1,B=$E(X,A)
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| 69 | I B']"" G QUOTE3
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| 70 | I B'=$C(39) G QUOTE3
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| 71 | S BMXTK=BMXTK_Q1_B G START
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| 72 | QUOTE3 S A=A-1,B=Q1,BMXTK=BMXTK_B,Q=0 G START
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| 73 | SPACE I B'=" " G OP
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| 74 | I BMXTK]"" S T=T+1,BMXTK(T)=BMXTK,BMXTK=""
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| 75 | G START
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| 76 | OP I "=><"'[B G OPAREN
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| 77 | I BMXTK]"" S T=T+1,BMXTK(T)=BMXTK,BMXTK=""
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| 78 | S T=T+1,BMXTK(T)=B,BMXTK=""
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| 79 | G START
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| 80 | OPAREN I B'="(" G CPAREN
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| 81 | S P=P+1
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| 82 | I BMXTK]"" S T=T+1,BMXTK(T)=BMXTK,BMXTK=""
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| 83 | S T=T+1,BMXTK(T)=B G START
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| 84 | CPAREN I B'=")" G B2
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| 85 | I P G B1
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| 86 | G B0
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| 87 | ;
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| 88 | B0 S BMXERR="SQL SYNTAX ERROR" D ERROR G B5
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| 89 | B1 S P=P-1
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| 90 | I BMXTK]"" S T=T+1,BMXTK(T)=BMXTK,BMXTK=""
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| 91 | S T=T+1,BMXTK(T)=B G START
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| 92 | B2 I B'="," G B3
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| 93 | S T=T+1,BMXTK(T)=BMXTK,T=T+1,BMXTK(T)=",",BMXTK="" G START
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| 94 | B3 S BMXTK=BMXTK_B
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| 95 | B4 G START
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| 96 | B5 I BMXTK]"" S T=T+1,BMXTK(T)=BMXTK
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| 97 | I $D(BMXERR) G B6
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| 98 | I P S BMXERR="SQL SYNTAX ERROR: MATCHING PARENTHESIS NOT FOUND" D ERROR
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| 99 | E I Q S BMXERR="SQL SYNTAX ERROR: MATCHING QUOTE NOT FOUND" D ERROR
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| 100 | I P>0 G START
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| 101 | B6 Q
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| 102 | ;
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| 103 | ERROR ;W !,"ERROR=",BMXERR,! Q
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| 104 | Q
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